Spiffy Color 1
| Volume Number: | | 6
|
| Issue Number: | | 11
|
| Column Tag: | | Color Workshop
|
Related Info: Color Quickdraw Memory Manager
Spiffy Color Demo 
By John A. Love, III, Springfield, VA
Note: Source code files accompanying article are located on MacTech CD-ROM or source code disks.
Spiffy Color Effects Demo
Part I
[John is a member of theWashington Apple Pi Users’ Group from the greater Washington D.C. metropolitan area and can be reached on Applelink {D3471} and on GEnie {J.LOVE7}]
Although the application file on the MacTutor disk is named “Rotation Demo”, the color effects illustrated are more inclusive, as follows:
a) Rotation.
b) Dissolve.
c) Text Scrolling & Un-Rolling. Select the “About ...” Menu item to observe these.
d) PICT/PICT2 scrolling.
e) Just for hex, press “z” or “Z” and enjoy!!
In addition, you’ll observe color menus, color windows, color icons, color Scroll Bars, color CuRSoRs and rotating CURSors (sorry, the latter are in “yucky” black-and-white). Found the hidden treasure(e) in the source listing yet-- I know it’s old stuff to some of you, but I’m still fascinated by it. Finally, you’ll listen to the joyous sound of Macintosh Developer Tech Support’s (MacDTS) mascot, DogCow™. All of this is in a MultiFinder™-aware demo package.
By the way, this daggum demo has successfully run on a:
• Mac IIx with Apple’s standard color monitor
• Mac IIci with Raster Op’s monitor & their 24-bit color card { will miracles never cease ????? }
• MacIIci mated with Radius’ Two Page Display and Apple’s standard color monitor, with my window entirely on one or the other. Pleeeeese don’t ask about my window overlapping both !!!!!
• I’m still looking for some rich soul with a Mac IIfx
I wrote this demo using Symantec’s THINKPascal© {Version 3.Ø} in conjunction with my all-time favorite assembler, “McAssembly©”, authored by Dave McWherter and formerly distributed by Signature Software. Followers of MacTutor may recall an article of mine in April, 1989, wherein I described “McAssembly©” in reasonable detail. Dave also authored a super text-processing DA, Vantage™, distributed by Preferred Publishers, which I also talked about in that same article.
As a programmer, I have only one regret; namely, I have just received Version 3.Ø of THINKPascal© which is MacApp™-compatible. I am still learning MacApp™ so I wrote the demo in the procedural mode. Since it is now April, maybe by the time this article is printed, I will feel more at ease with MacApp™.
Speaking of MacApp™, if you’re just beginning to program using MacApp™ or are thinking of starting but the thought scares ‘the-heck-out-of-you’ because of its reported complexity, I whole-heartedly suggest you get the following docs from APDA:
a) Introduction to MacApp v. 2.0 and Object-Oriented- Programming, Beta Draft
b) MacApp v. 2.0 Tutorial, Beta Draft
c) MacApp v. 2.0 Cookbook, Beta Draft
They are really excellent!!! They cover the waterfront, yet adhere to the KISS principle.
Before I progress to some of the programming goodies, let me say that beyond any doubt whatsoever, I would never have ‘gotten to first base’ without the patient assists of Mr. Jon Zap from MacDTS. His tutorials via Applelink™ were superb. In addition, take a gander at some of Mr. SkippyWhite’s great off-screen device code on “Phil and Dave’s Excellent CD”. Because I relied principally on off-screen pixmaps, vice off-screen devices, I used only a tiny portion of Skippy White’s code. ‘How-some-ever’, I learned a heck-of-a-lot. Good stuff ... Thanks Jon & Skippy!!!!!
Before I end this thing, I would like to share with you some of my findings while working in the color world. I’ll try to be brief simply because by the time the source listings end below, Kirk Chase will be ready to kill me:
Color Controls
Some wierd goings-on here as described in the following code-segment in my “UpActionProc”:
{1}
newCtlValue := oldCtlValue - 1; { Decrement 1 line }
{ _SetCtlValue appears buggy for a Mac II set to black-and- }
{ white. Works okay in color, though ????? }
temp := ctl^^.contrlRect;
InsetRect(temp, 1, 1);
ClipRect(temp);
SetCtlValue(ctl, newCtlValue);
ClipRect(ctl^^.contrlOwner^.portRect); { Reset. }
Actually the above craziness is necessary anytime I call _SetCtlValue or something comparable such as _SetCtlMax; for example, in my “DoPeriodic” PROC wherein I look to see if the ctlMax needs to be reset which it must be when I either resize the window or zoom it. Please don’t ask me why this craziness is required!!!!! By the way, my scrolling code is simply Dan Weston’s Assembly code converted to Pascal (see his positively super two book series about programming in Assembly).
Color Menus
Nothing fancy here. I simply used RMaker™ to construct a “mctb” resource with ID=0 because that is the resource loaded when _InitMenus is executed. Within this resource, the so-called menubar entry led, followed by the appropriate exceptions to this menubar entry; for example, a particular menu title or a particular menu item. Without these exceptions, the leading menubar entry takes care of the whole thing.
I suppose I could have constructed “mctb” resources for each individual menu, with matching IDs. These resources are loaded by _GetMenu. However, since the effect for my particular demo is the same, I chose the “ID=0” approach.
Rotation in Color
I used John Olsen’s bit rotation scheme as originally published in MacTutor (February,1988). John’s code was in Assembly language, so I continued his example. Its conversion to color turned out to be a bear because I kept getting bus errors. There is nothing fancy about its conversion to color -- simply rotate pixels, rather than bits.
Dissolve in Color
I used Mike Morton’s dissolve scheme that he wrote in Assembly language and originally published in MacTutor (December,1985). Dig up this oldie and track down Mike’s subroutine that he entitles “Convert” and that’s the only place that multiple bits-per-pixel enter the picture. It took me longer to find that ‘antique’ issue of MacTutor than it did to implement the required changes.
Scrolling PICTs ...
Just to convey some idea of the speed & resultant efficiency of creating and using off-screen bitmaps/pixmaps, the following code could have been used to scroll the PICT drawn in the content region of the active window in response to a mouseDown Event in one of its scroll bars:
{2}
PROCEDURE ScrollContents (ctl: ControlHandle; dh, dv: INTEGER);
VAR
window: WindowPtr;
oldClip: RgnHandle;
myPic: PicHandle;
BEGIN
window := ctl^^.contrlOwner; { We KNOW this is the GrafPort.}
oldClip := NewRgn;
GetClip(oldClip);
{ I placed it here, vice in the windowPic field--so sue me. }
myPic := PicHandle(WindowPeek(window)^.refCon);
;
ClipRect(windPICTrect); { These rects are globals. }
EraseRect(windPICTrect);
OffsetRect(scrolledFullPICTrect, dh, dv);
DrawPicture(myPic, scrolledFullPICTrect);
;
SetClip(oldClip);
ValidRect(windPICTrect); { NO updates please !! }
DisposeRgn(oldClip);
END; { ScrollContents }
This works; however, the effects of _EraseRect are visible. In short, as you scroll the PICT, the image blinks ... even on a MacII set to black-and-white. The method of choice then becomes creating an off-screen bitmap/pixmap, scrolling it off-screen and finally _CopyBits-ing it on-screen. Granted ... in color the PICT does blink, but only slightly and in black-and-white on a MacII there is no blinking that I can discern, anyway.
Zooming a window in response to a keypress
This last ‘goodie’ has nothing to do with strictly color, but applies also to black-and-white. “Inside Macintosh”, Volume IV, stipulates that “ZoomWindow is in no way tied to the TrackBox function...”. Neat!! So, take a gander:
{3}
PROCEDURE HandleKey;
VAR
keyASCII: INTEGER;
key: char;
BEGIN
IF NOT applWind THEN
EXIT(HandleKey);
;
IF BitAnd(Event.modifiers, $0F00) = cmdKey THEN { ONLY the Command
Key }
HandleMenu
ELSE
BEGIN
keyASCII := BitAnd(Event.message, CharCodeMask);
key := CHR(keyASCII);
IF (key = ‘z’) | (key = ‘Z’) THEN
doZoom(FrontWindow, nextState) { More on “nextState” below. }
ELSE
SysBeep(10);
END; { ELSE no leading Command key }
END; { HandleKey }
The key is to keep your ‘doZoom’ PROC separate so your ‘HandleMouse’ PROC looks something like:
{4}
PROCEDURE HandleMouse;
VAR
...
BEGIN
CASE windowLoc OF { windowLoc + others below = Globals }
...
inZoomOut, inZoomIn:
IF TrackBox(TheWindow, Event.where, windowLoc) THEN
doZoom(TheWindow, windowLoc);
...
END; { CASE }
END; { HandleMouse }
But ... (there’s always one!! in every crowd) ... I’ve got to determine what ‘state’ the window is currently in, the userState that depicts the to-be-zoomed-out state or the stdState that depicts the to-be-zoomed-in state. Well, that part’s easy--my “nextState” global (see my HandleKey PROC above) is:
a) initialized to inZoomOut upon start--up.
b) set to inZoomOut at the end of my windowLoc: inZoomIn code.
c) set to inZoomIn at the end of my windowLoc: inZoomOut code.
d) set to inZoomOut at the end of my ‘doGrow’ PROC.
The real rub comes within the windowLoc = ‘inDrag’ part of my ‘HandleMouse’ PROC:
{6}
inDrag:
BEGIN
...
{ DragWindow forces the Mouse to stay inside of tempRect }
{ which has already been quantified }
DragWindow(TheWindow, Event.where, tempRect);
{ The following craziness ????? is required ’cause I zoom }
{ the window in response to a keypress. I call SizeWindow }
{ with NO effective change just to re-quantify the user }
{ State in the WStateRec(ord. }
WITH TheWindow^.portRect DO
SizeWindow(TheWindow, right - left, bottom - top, FALSE); { NO update
!! }
GetMouse(mouseLoc);
LocalToGlobal(mouseLoc);
IF PtInRect(mouseLoc, tempRect) THEN
{ It’s a drag, allright !! }
nextState := inZoomOut;
{ ELSE NO change !! }
END; { inDrag }
Color CuRSoRs
Color Cursors are wierd, just plain wierd. In the black-and-white world, the call to change the Cursor is always to the ROM pair, _GetCursor and _SetCursor. Watch out, color
a) _GetCCursor once and only upon an Activate/Resume Event.
b) _DisposCCursor upon a DeActivate/Suspend Event.
c) _SetCCursor when your _PtInRect call returns TRUE but also set a flag, to whit:
{7}
IF NOT stillColorCrsr AND PtInRect( ) THEN
BEGIN
SetCCursor(yourCrsrHdl);
stillColorCrsr := TRUE;
END;
As I said, ‘Watch Out!!!
Just in case the sub-title of this article failed to catch your eye, namely the “Part I”, there’s something deliberately missing from this month’s article due to length restrictions. That which is missing is ALL the assembly source code and the “RMaker” source code your patience will be rewarded next month.
Figured out the treasure hidden in (e) yet ... if not, read on, for the source now begins:
Listing: rotInterface.p
UNIT rotInterface;
INTERFACE
{ ----------------------}
{ Memory Manager stuff: }
{ ----------------------}
FUNCTION NewClearHandle (logicalSize: Size): Handle;
INLINE
{ The PASCAL-supplied interface is }
{ denoted with "***": }
{ }
{ *** subq.w #4,sp }
{ *** move.l logicalSize,-(sp) }
{ $201F:move.l (sp)+,d0 }
{ $A322: _NewHandle,clear }
{ $31C00220:move.w d0,MemErr }
{ $2E88:move.l a0,(sp) }
{ *** move.l (sp)+,xxxx }
$201F, $A322, $31C0, $0220, $2E88;
FUNCTION NewSysHandle (logicalSize: Size): Handle;
INLINE
$201F, $A522, $31C0, $0220, $2E88;
FUNCTION NewSysClearHandle (logicalSize: Size): Handle;
INLINE
$201F, $A722, $31C0, $0220, $2E88;
FUNCTION NewClearPtr (logicalSize: Size): Ptr;
INLINE
$201F, $A31E, $31C0, $0220, $2E88;
FUNCTION NewSysPtr (logicalSize: Size): Ptr;
INLINE
$201F, $A51E, $31C0, $0220, $2E88;
FUNCTION NewSysClearPtr (logicalSize: Size): Ptr;
INLINE
$201F, $A71E, $31C0, $0220, $2E88;
{ ------------------ }
{ Keeping A5 around: }
{ ------------------ }
PROCEDURE PushA5;
INLINE
$2F0D; { MOVE.L A5,-(SP) }
PROCEDURE PopA5;
INLINE
$2A5F; { MOVE.L (SP)+,A5 }
{ will point to our parmeter block. Therefore, the value }
{ of CurrentA5 that we stored will be at - 4(A0). }
PROCEDURE GetMyA5;
INLINE
$2A68, $FFFC; { MOVE.L -4(A0),A5 }
{ ---------------------------------------------------- }
{ Assembly Language routines }
{ -> in “rotAsm.Lib”: }
{ ---------------------------------------------------- }
FUNCTION RotateBits (srcBits, dstBits: BitMap): OSErr;
PROCEDURE DissBits (srcBits, dstBits: BitMap; srcRect, dstRect: Rect);
IMPLEMENTATION
FUNCTION RotateBits (srcBits, dstBits: BitMap): OSErr;
external;
PROCEDURE DissBits (srcBits, dstBits: BitMap; srcRect, dstRect: Rect);
external;
END. { UNIT = rotInterface }
Listing: rotGlobals.p
UNIT rotGlobals;
INTERFACE
USES
Palettes;
{ --------------------------------- }
{ Global constants: }
{ --------------------------------- }
CONST
SP = ' ';
CurrentA5 = $904; { low-mem globals... }
GrayRgn = $9EE; { Handle to region drawn as desktop. }
ROM85Loc = $28E;
mBarHeightLoc = $BAA;
AppleMenuID = 1001; { My specific constants ... }
AboutItem = 1;
AdisabledItem = 2;
EditMenuId = 1002;
UndoItem = 1;
EdisabledItem = 2;
CutItem = 3;
CopyItem = 4;
PasteItem = 5;
ClearItem = 6;
GraphicsMenuID = 1003;
RotateItem = 1;
DissolveItem = 2;
GdisabledItem = 3;
QuitItem = 4;
monsterID = 128; { PICTs ... }
bwGigantorID = 129;
colorGigantorID = 130;
logoID = 131;
acurWorld = 128; { Rotating CURSors... }
acurDogCow = 129;
mainWindowID = 128;
horizScrollID = 128; { ... also, the CNTL’s refCon. }
vertScrollID = 129;
growBoxSize = 15;
scrollWidth = 16; { Samo-Samo }
scrollHeight = 16;
{ ---------- }
logoWindowID = 129;
pmWhite = 0; {Palette Mgr stuff...}
pmBlack = 1;
pmYellow = 2;
pmMagenta = 3;
pmRed = 4;
pmCyan = 5;
pmGreen = 6;
pmBlue = 7;
pmLtBlue = 8;
pmLtGray = 9;
IACScicnID = 128;
HANDcrsrID = 129;
{ --------------------------------------------------------------------------------------------------------------
}
{ ... for Error handling in my Off-screen map routine(s): }
{ --------------------------------------------------------------------------------------------------------------
}
NewPtrError = -10000;
NewHdlError = -15000;
CloneHdlError = -20000;
MaxDevError = -25000;
{ ------------------------------------ }
{ MultiFinder stuff: }
{ ------------------------------------ }
_WaitNextEvent = $A860;
_Unimplemented = $A89F;
SysEnvironsVersion = 1;
{ OSEvent is the event number of the suspend/resume and }
{ mouse-moved Events sent by MultiFinder. Once you }
{ determine that an event is an OSEvent, look at the High }
{ byte of the message sent with the event to determine }
{ which kind it is. To differentiate between suspend & }
{ resume, look at resumeMask bit. }
OSEvent = app4Evt;
suspendResumeMessage = 1;
mouseMovedMessage = $FA;
resumeMask = 1;
{ -------------------------- }
{ Global types: }
{ -------------------------- }
TYPE
RgnHandlePtr = ^RgnHandle;
wordPtr = ^INTEGER;
longPtr = ^LONGINT;
BitMapPtr = ^BitMap;
MyVBLType = RECORD
CurrA5: LONGINT; { Lost & Found!! }
MyVBL: VBLTask; { The actual Task }
END; { MyVBLType }
acurType = RECORD {Poetry in motion!!}
nbrCursors: INTEGER;
frameCounter: INTEGER;
cursorIDs: ARRAY[0..0] OF LONGINT; {in High word. }
END; { acurType }
acurPtr = ^acurType;
acurHandle = ^acurPtr;
WStatePtr = ^WStateData; { For zooming the window in }
WStateHdl = ^WStatePtr; { response to a keypress. }
{ -------------------------------------- }
{ Global variables: }
{ -------------------------------------- }
VAR
screen: Rect;
ROM: wordPtr;
mBarHt: INTEGER;
AppleMenu, EditMenu, GraphicsMenu: MenuHandle;
aMac2: BOOLEAN;
colorDepth: INTEGER;
monsterPicHdl: PicHandle;
fullPICTrect, windPICTrect: Rect;
TheWindow: WindowPtr;
windDef: INTEGER; { Variation Code }
horizControl, vertControl: ControlHandle;
Event: EventRecord;
windowLoc: INTEGER;
daWind, applWind: BOOLEAN;
currEdit, currGraphics: BOOLEAN;
myVBLRec: MyVBLType;
acurHdl: Handle;
CURS_ID0, nbrGlobe: INTEGER;
Done, InWindow: BOOLEAN;
WNE, InForeGround, justOpened, justBragging: BOOLEAN;
Sleep, finalTicks: LONGINT;
colorHandCrsr: CCrsrHandle;
stillColorCrsr: BOOLEAN;
CreateOffScreenError: OSErr; { usual off-screen stuff }
oldDevice, myMaxDevice: GDHandle;
offBitMapPtr, onScreenBitsPtr: BitMapPtr;
myBits: Ptr;
offGrafPort: GrafPort;
offGrafPtr, onBWScreen: GrafPtr;
offCGrafPort: CGrafPort;
offCGrafPtr, onCScreen: CGrafPtr;
ourCTHandle: CTabHandle;
scrolledFullPICTrect: Rect; { For scrolling. }
zoomBackIn: Rect; { For zooming ... }
nextState: INTEGER;
stateHandle: WStateHdl;
saveWindPICTrect, saveFullPICTrect,
saveScrolledFullPICTrect: Rect;
IMPLEMENTATION
END. { UNIT = rotGlobals }
Listing: rotMiscSubs.p
UNIT rotMiscSubs;
INTERFACE
USES
Palettes, Retrace, Sound, rotInterface, rotGlobals;
PROCEDURE InitManagers;
FUNCTION TestForMac2: BOOLEAN;
FUNCTION TestForColor: INTEGER;
PROCEDURE LocalGlobal (VAR r: Rect);
PROCEDURE GlobalLocal (VAR r: Rect);
FUNCTION WNEisImplemented: BOOLEAN;
PROCEDURE PlaySound (mySound: Str255);
PROCEDURE InstallVBLTask (rsrcID: INTEGER);
PROCEDURE RemoveVBLTask;
FUNCTION GetMouseMovement (gMouse0: Point): Size;
FUNCTION DoubleClick: BOOLEAN;
IMPLEMENTATION
PROCEDURE FatalSystemCrash;
BEGIN
ExitToShell;
END; { FatalSystemCrash }
PROCEDURE InitManagers;
BEGIN
MoreMasters;
MoreMasters;
MoreMasters;
MoreMasters;
InitGraf(@thePort);
InitFonts;
InitWindows;
InitMenus;
TEInit;
InitDialogs(@FatalSystemCrash);
;
FlushEvents(everyEvent, 0);
InitCursor;
END; { InitManagers }
{ ============================================== }
{ Test for a Mac II, or an SE30 for that matter: }
{ ============================================== }
FUNCTION TestForMac2: BOOLEAN;
VAR
theWorld: SysEnvRec;
error: OSErr;
BEGIN
TestForMac2 := FALSE; { Assume the old stuff !! }
error := SysEnvirons(1, theWorld);
IF error <> 0 THEN
EXIT(TestForMac2);
IF theWorld.machineType >= envMacII THEN
TestForMac2 := TRUE;
END; { TestForMac2 }
{ ======================================================== }
{ Test for the presence of a Mac with Color QuickDraw and }
{ a Color Monitor set to Color via the Control Panel or }
{ using the “Switch-A-Roo” FKEY. Return the color depth: }
{ ======================================================== }
FUNCTION TestForColor: INTEGER;
LABEL
100;
VAR
theWorld: SysEnvRec;
error: OSErr;
BEGIN
TestForColor := 1;{ Assume B&W }
error := SysEnvirons(1, theWorld);
IF error <> 0 THEN
EXIT(TestForColor);
IF NOT theWorld.hasColorQD THEN
GOTO 100;
TestForColor := GetGDevice^^.gdPMap^^.pixelSize;
100:
END; { TestForColor }
{ =================== }
{ A short-cut or two: }
{ =================== }
PROCEDURE LocalGlobal (VAR r: Rect);
BEGIN
LocalToGlobal(r.topLeft);
LocalToGlobal(r.botRight);
END; { LocalGlobal }
PROCEDURE GlobalLocal (VAR r: Rect);
BEGIN
GlobalToLocal(r.topLeft);
GlobalToLocal(r.botRight);
END; { GlobalLocal }
{ =================================== }
{ Common to the routines that follow: }
{ =================================== }
FUNCTION TrapAvailable (myTrapNbr: INTEGER; myTrapType:
TrapType): BOOLEAN;
VAR
UnimplementedTrapNbr: INTEGER;
BEGIN
{ LONGINT -> INTEGER }
UnimplementedTrapNbr := LoWord(BXOR(_Unimplemented, $A800));
TrapAvailable := (NGetTrapAddress(myTrapNbr, myTrapType) <> GetTrapAddress(UnimplementedTrapNbr));
END; { TrapAvailable }
{ ============================================== }
{ Check to see if _WaitNextEvent is implemented: }
{ ============================================== }
FUNCTION WNEisImplemented: BOOLEAN;
VAR
WNEtrapNbr: INTEGER;
theWorld: SysEnvRec;
discardError: OSErr;
BEGIN
WNEtrapNbr := LoWord(BXOR(_WaitNextEvent, $A800));
{ Since _WaitNextEvent and _HFSDispatch have the same trap }
{ number ( = $60 ), we can call “TrapAvailable” for }
{ _WaitNextEvent ONLY if we are on a machine that supports }
{ separate OS and ToolBox trap tables. Therefore, we }
{ need to check for a machineType that is >= 0. NOTE that }
{ even if we get an error calling _SysEnvirons, the }
{ compiler’s glue has filled-in the machineType field: }
discardError := SysEnvirons(SysEnvironsVersion, theWorld);
IF theWorld.machineType < 0 THEN
WNEisImplemented := FALSE
ELSE
WNEisImplemented := TrapAvailable(WNEtrapNbr, ToolTrap);
END; { WNEisImplemented }
{ ===================== }
{ Play it again, Sam !! }
{ ===================== }
PROCEDURE PlaySound (mySound: Str255);
CONST
_SndPlay = $A805;
VAR
SndPlayTrapNbr: INTEGER;
theWorld: SysEnvRec;
discardError: OSErr;
SndPlayIsImplemented: BOOLEAN;
sndHandle: Handle;
BEGIN
SndPlayTrapNbr := LoWord(BXOR(_SndPlay, $A800));
discardError := SysEnvirons(SysEnvironsVersion, theWorld);
IF theWorld.machineType < 0 THEN
SndPlayIsImplemented := FALSE
ELSE
SndPlayIsImplemented := TrapAvailable(SndPlayTrapNbr, ToolTrap);
;
sndHandle := GetNamedResource(‘snd ‘, mySound);
IF NOT SndPlayIsImplemented | (sndHandle = NIL) THEN
EXIT(PlaySound);
discardError := SndPlay(NIL, sndHandle, FALSE);
END; { PlaySound }
{ ======================== }
{ My spinning CURSor Task: }
{ ======================== }
PROCEDURE SpinTheBottle; { Love it !!! }
VAR
globe: cursHandle;
globeID: INTEGER;
BEGIN
PushA5;
GetMyA5;
globeID := CURS_ID0 + nbrGlobe - 1;
globe := GetCursor(globeID);
SetCursor(globe^^);
nbrGlobe := nbrGlobe - 1; { Reset stuff for next time }
IF nbrGlobe = 0 THEN
nbrGlobe := acurHandle(acurHdl)^^.nbrCursors;
myVBLRec.MyVBL.vblCount := 10;
PopA5;
END; { SpinTheBottle }
{ ============================= }
{ Round-and-around she goes ... }
{ ============================= }
PROCEDURE InstallVBLTask (rsrcID: INTEGER);
VAR
watch: cursHandle;
ignore: INTEGER;
BEGIN
acurHdl := GetResource(‘acur’, rsrcID);
IF acurHdl = NIL THEN
BEGIN
watch := GetCursor(watchCursor);
SetCursor(watch^^); { Reset later by HandleCursor. }
END { IF acurHdl = NIL }
ELSE
BEGIN
CURS_ID0 := HiWord(acurHandle(acurHdl)^^.cursorIDs[0]);
nbrGlobe := acurHandle(acurHdl)^^.nbrCursors;
;
WITH myVBLRec, MyVBL DO
BEGIN
CurrA5 := longPtr(CurrentA5)^;
vblAddr := @SpinTheBottle;
vblCount := 10; { Six times every second. }
qType := ORD(vType);
vblPhase := 0;
END; { WITH }
ignore := VInstall(@myVBLRec.MyVBL);
END; { ELSE }
END; { InstallVBLTask }
PROCEDURE RemoveVBLTask;
VAR
ignore: INTEGER;
BEGIN
IF acurHdl <> NIL THEN
ignore := VRemove(@myVBLRec.MyVBL);
acurHdl := NIL; { Mark as gone. }
{ CURSor reset later by “HandleCursor”.}
Sleep := 1; { ... so above happens under MultiFinder. }
stillColorCrsr := FALSE; { See “HandleCursor”. }
END; { RemoveVBLTask }
{ ===================================================== }
{ Returns vertical movement in High word and horizontal }
{ movement in low word, similar to _GrowWindow. }
{ }
{ Note the input Point is in GLOBAL coordinates. }
{ Otherwise, dragging a window will return 0 movement. }
{ ===================================================== }
FUNCTION GetMouseMovement (gMouse0: Point): Size;
VAR
mouseLoc: Point;
mouseDH, mouseDV: INTEGER;
sizeMove: Size;
BEGIN
GetMouse(mouseLoc);
LocalToGlobal(mouseLoc);
mouseDH := mouseLoc.h - gMouse0.h;
mouseDV := mouseLoc.v - gMouse0.v;
IF mouseDH < 0 THEN { Abs vals }
mouseDH := -mouseDH;
IF mouseDV < 0 THEN
mouseDV := -mouseDV;
sizeMove := mouseDV;
sizeMove := BSL(sizeMove, 16);
sizeMove := sizeMove + mouseDH;
GetMouseMovement := sizeMove;
END; { GetMouseMovement }
{ ================================= }
{ Note that the algorithm I used }
{ returns FALSE if we are dragging. }
{ ================================= }
FUNCTION DoubleClick: BOOLEAN;
VAR
startTime, endTime, doubleTime: LONGINT;
mouseLoc0: Point;
sizeMove: Size;
BEGIN { DoubleClick }
DoubleClick := FALSE; {Assume Nada!!}
doubleTime := GetDblTime;
startTime := TickCount; { Initial time. }
endTime := startTime;
GetMouse(mouseLoc0); { Initial mouse location. }
LocalToGlobal(mouseLoc0);
WHILE StillDown & ((endTime - startTime) <= doubleTime) DO { 1st mouse
click. }
endTime := TickCount; { Times out if dragging ... }
sizeMove := GetMouseMovement(mouseLoc0);
WHILE ((endTime - startTime) <= doubleTime) & (LoWord(sizeMove) <= 5)
& (HiWord(sizeMove) <= 5) DO
BEGIN
IF Button THEN
BEGIN
DoubleClick := TRUE; { 2nd time’s a charm !! }
Leave;
END; { IF Button }
endTime := TickCount;
sizeMove := GetMouseMovement(mouseLoc0);
END; { WHILE small delta Time AND small delta movement}
END; { DoubleClick }
END. { UNIT = rotMiscSubs }
Listing: OffscreenSubs.p
{ --------------------------------------------------------------------------
}
{ From: Apple MacDTS }
{ }
{ Some of “Skippy White’s Famous High }
{ Level Off-Screen Map Routines” }
{ }
{ These routines provide a high-level }
{ interface to the QuickDraw & Color }
{ Manager routines which allow the }
{ creation and manipulation of }
{ off-screen bitmaps and pixmaps. They }
{ are designed to run on any machine }
{ with 128K or later ROMs. }
{ }
{ NOTE that I’ve modified some of }
{ Skippy’s routines and, therefore, any }
{ resultant errors in syntax or logic }
{ belong solely to me. }
{ --------------------------------------------------------------------------
}
UNIT OffscreenSubs;
INTERFACE
USES
rotInterface, rotGlobals, rotMiscSubs;
FUNCTION GetMaxAreaDevice (globalRect: Rect): GDHandle;
FUNCTION CreateOffScreen (VAR myRect: Rect): OSErr;
PROCEDURE ToOnScreen;
PROCEDURE DisposOffScreen;
IMPLEMENTATION
{ ********** }
FUNCTION GetMaxAreaDevice (globalRect: Rect): GDHandle;
{ Find largest overlap device for given global rectangle. }
VAR
area: LONGINT;
maxArea: LONGINT;
device: GDHandle;
intersection: Rect;
BEGIN
GetMaxAreaDevice := NIL;
maxArea := 0;
device := GetDeviceList;
WHILE device <> NIL DO
BEGIN
IF TestDeviceAttribute(device, screenDevice) THEN
IF TestDeviceAttribute(device, screenActive) THEN
IF SectRect(globalRect, device^^.gdRect, intersection) THEN
BEGIN
WITH intersection DO
area := LONGINT(right - left) * LONGINT(bottom - top);
IF area > maxArea THEN
BEGIN
GetMaxAreaDevice := device;
maxArea := area;
END; { IF area > maxArea }
END; { IF SectRect ... }
device := GetNextDevice(device);
END; { WHILE device <> NIL }
END; { GetMaxAreaDevice }
{ ************************************* }
{ For scrolling & other nifty stuff ... }
{ ************************************* }
FUNCTION CreateOffScreen (VAR myRect: Rect): OSErr;
{ Reference: Tech Note #120 }
{ with special thanks to Jon Zap of MacDTS }
{ NOTE: Local window coords are input but local screen }
{ coordinates are returned for drawing purposes. }
VAR
offRowBytes: LONGINT;
sizeOfOff: LONGINT;
localRect, globRect: Rect;
i, maxDepth: INTEGER;
err: OSErr;
PROCEDURE ErrorOut (error: OSErr);
BEGIN
CreateOffScreen := error;
EXIT(CreateOffScreen);
END; { ErrorOut }
BEGIN { CreateOffScreen }
CreateOffScreen := noErr;
globRect := myRect;
{ We’re about to switch the Port to off-screen: }
LocalGlobal(globRect);
IF colorDepth = 1 THEN
BEGIN
offGrafPtr := @offGrafPort;
OpenPort(offGrafPtr);
maxDepth := 1;
END { IF colorDepth = 1 }
ELSE
BEGIN
myMaxDevice := GetMaxAreaDevice(globRect);
IF myMaxDevice = NIL THEN
ErrorOut(MaxDevError);
oldDevice := GetGDevice;
SetGDevice(myMaxDevice);
offCGrafPtr := @offCGrafPort; { Initialize this guy. }
OpenCPort(offCGrafPtr);
maxDepth := offCGrafPtr^.portPixMap^^.pixelSize;
END; { ELSE: colorDepth > 1 }
{ Before we do ANYthing more, we set the off-screen’s }
{ visRgn to the FULL size of the input rect so the }
{ image stays whole if the window has been dragged }
{ partly beyond the physical edge(s) of the screen. }
{ Otherwise, the visRgn^^.rgnBBox in local coordinates }
{ remains equal to screenBits.bounds as inited when }
{ _Open(C)Port was called: }
IF colorDepth > 1 THEN
RectRgn(offCGrafPort.visRgn, globRect)
ELSE
RectRgn(offGrafPort.visRgn, globRect);
localRect := globRect;
GlobalLocal(localRect);
WITH localRect DO
BEGIN
offRowBytes := (maxDepth * (right - left) + 15) DIV 16; { # of words.
}
IF ODD(offRowBytes) THEN {Made even.}
offRowBytes := offRowBytes + 1;
offRowBytes := offRowBytes * 2; { Back to bytes. }
sizeOfOff := LONGINT(bottom - top) * offRowBytes;
END; { WITH }
myBits := NewClearPtr(sizeOfOff); { Allocate space for the pixel image.}
IF MemError <> noErr THEN
ErrorOut(NewPtrError);
{ NOTE that we’re filling in the BitMap/PixMap fields of }
{ the new Port directly, so we do NOT call _ SetPortBits }
{ or _SetCPortPix later: }
IF colorDepth > 1 THEN
BEGIN
WITH offCGrafPtr^.portPixMap^^ DO
BEGIN
baseAddr := myBits;
rowBytes := offRowBytes + $8000; { Be a PixMap. }
bounds := localRect;
END; { WITH }
offBitMapPtr := BitMapPtr(offCGrafPtr^.portPixMap^);
END { IF colorDepth > 1 }
ELSE { “Yucky” black-and-white. }
BEGIN
WITH offGrafPtr^.portBits DO
BEGIN
baseAddr := myBits;
rowBytes := offRowBytes;
bounds := localRect;
END;
offBitMapPtr := @offGrafPtr^.portBits;
END;
IF colorDepth > 1 THEN
BEGIN
{ Next, we clone the color table of the maxDevice }
{ and put it into our off-screen pixel map. }
ourCTHandle := myMaxDevice^^.gdPMap^^.pmTable;
err := HandToHand(Handle(ourCTHandle));
IF err <> noErr THEN
ErrorOut(CloneHdlError);
FOR i := 0 TO ourCTHandle^^.ctSize DO
ourCTHandle^^.ctTable[i].value := i;
{ The following is required to convert }
{ GDevice cluts to Pixmap cluts. }
ourCTHandle^^.ctFlags:=
BAND(ourCTHandle^^.ctFlags, $7FFF);
ourCTHandle^^.ctSeed := GetCTSeed;
offCGrafPtr^.portPixMap^^.pmTable :=
ourCTHandle; { --> the off-screen map. }
END; { IF colorDepth > 1 }
myRect := localRect; { Return local screen coordinates.}
END; { CreateOffScreen }
{ ******************* }
{ Back to “Square 1”: }
{ ******************* }
PROCEDURE ToOnScreen;
BEGIN
IF colorDepth > 1 THEN
BEGIN
GetCWMgrPort(onCScreen);
SetPort(GrafPtr(onCScreen));
SetGDevice(oldDevice);
onScreenBitsPtr := BitMapPtr(onCScreen^.portPixMap^);
END { IF colorDepth > 1 }
ELSE
BEGIN
GetWMgrPort(onBWScreen);
SetPort(onBWScreen);
onScreenBitsPtr := @onBWScreen^.portBits;
END; { ELSE = “Yucky” black-and-white }
END; { ToOnScreen}
{ **************************** }
{ Out with the new. }
{ Whoops -- I meant the old !! }
{ **************************** }
PROCEDURE DisposOffScreen;
LABEL
100, 200;
BEGIN
IF CreateOffScreenError = MaxDevError THEN
EXIT(DisposOffScreen)
ELSE IF CreateOffScreenError = NewPtrError THEN
GOTO 200
ELSE IF CreateOffScreenError = CloneHdlError THEN
GOTO 100;
{ noErr ... }
IF colorDepth > 1 THEN
DisposHandle(Handle(ourCTHandle));
100:
DisposPtr(myBits);
200:
IF colorDepth > 1 THEN
CloseCPort(offCGrafPtr)
ELSE
ClosePort(offGrafPtr);
END; { DisposOffScreen }
END. { UNIT = OffscreenSubs }
| Continued in next frame
|
|
|
| Volume Number: | | 6
|
| Issue Number: | | 11
|
| Column Tag: | | Color Workshop
|
Related Info: Color Quickdraw Memory Manager
Spiffy Color Demo (code) 
By John A. Love, III, Springfield, VA
Listing: rotScrollSubs.p
UNIT rotScrollSubs; { Thanks, Dan Weston !!!!! }
INTERFACE
USES
Palettes, rotGlobals, rotMiscSubs, OffScreenSubs;
PROCEDURE ScrollText (myText: QDPtr; box: Rect);
PROCEDURE Scroll (ctl: ControlHandle; part: INTEGER; Pt: Point);
FUNCTION DrawMyControl (ctl: ControlHandle): BOOLEAN;
FUNCTION ScrollHoriz (windPtr: WindowPtr): ControlHandle;
FUNCTION ScrollVert (windPtr: WindowPtr): ControlHandle;
PROCEDURE ScrollShow (windPtr: WindowPtr);
PROCEDURE ScrollHide (windPtr: WindowPtr);
PROCEDURE InvalidScroll (windPtr: WindowPtr);
PROCEDURE ValidScroll (windPtr: WindowPtr);
PROCEDURE ScrollResize (windPtr: WindowPtr);
PROCEDURE SetMaxCtls (windPtr: WindowPtr);
PROCEDURE SetCtlsToMin (windPtr: WindowPtr);
VAR
window: WindowPtr;
VertOrHoriz: LONGINT;
oldCtlValue: INTEGER;
stillThere: INTEGER;
temp: Rect;
IMPLEMENTATION
{ ----------------------------------------------------------------------------------------
}
{ Scrolls your text string from right to left. }
{ ----------------------------------------------------------------------------------------
}
PROCEDURE ScrollText (myText: QDPtr; box: Rect);
LABEL
100, 200, 300, 400, 500, 600;
VAR
myPort: GrafPtr;
buffer: ARRAY[0..255] OF SignedByte;
textBuf: QDPtr;
boxWidth: INTEGER;
leftJustify: BOOLEAN;
x0, y0: INTEGER;
widthSpace: INTEGER;
textLen: SignedByte;
bufWidth: INTEGER;
firstChar: INTEGER;
lastChar: INTEGER;
charCount: INTEGER;
finalTicks: LONGINT;
BEGIN
GetPort(myPort);
ClipRect(myPort^.portRect);
textLen := myText^;
IF textLen = 0 THEN { Null string. }
EXIT(ScrollText);
textBuf := QDPtr(ORD4(@buffer));
{ Include the length byte. }
textLen := SignedByte(ORD(textLen) + 1);
BlockMove(Ptr(myText), Ptr(textBuf), size(textLen));
;
buffer[0] := textLen; { textLen = textLen + 1 from above.}
{ Add a trailing space. }
buffer[ORD(textLen)] := SignedByte(SP);
widthSpace := CharWidth(SP);
WITH box DO
BEGIN
boxWidth := right - left;
y0 := bottom - top;
IF y0 < 10 THEN { NOT tall enough !! }
EXIT(ScrollText);
y0 := (y0 - 6) DIV 2;
y0 := bottom - y0; { y0 = bottom - 7 for box.tall=20 }
END;
leftJustify := FALSE; { Assume right-justified text. }
;
firstChar := 1; { Start AFTER length byte. }
lastChar := 1;
charCount := 1;
{ Scroll the text: }
100:
bufWidth := TextWidth(textBuf, firstChar, charCount);
IF bufWidth > boxWidth THEN { Text does NOT fit !! }
BEGIN
firstChar := firstChar + 1; { Drop 1st character and }
charCount := charCount - 1; { try for fit again. }
leftJustify := TRUE;
GOTO 100;
END; { IF bufWidth > boxWidth }
{ it Fits }
200:
EraseRect(box);
x0 := box.right - bufWidth;
IF x0 < box.left THEN
{ Needed ONLY for very short strings. }
leftJustify := TRUE;
IF leftJustify THEN
x0 := box.left;
{ y0 := box.bottom - 7; }
MoveTo(x0, y0);
DrawText(textBuf, firstChar, charCount);
lastChar := lastChar + 1;
IF lastChar <= ORD(textLen) THEN
{ Haven’t reached end of string. }
GOTO 400;
IF leftJustify THEN { We’ve reached the left edge. }
GOTO 300;
{ Not to left edge yet. }
bufWidth := bufWidth + widthSpace;
Delay(10, finalTicks); { ... otherwise too quick. }
GOTO 200;
{ At left edge. }
300:
firstChar := firstChar + 1;
charCount := charCount - 1;
IF charCount = 0 THEN { All characters moved left. }
GOTO 600; { Fini !! }
GOTO 500;
{ Next character. }
400:
charCount := charCount + 1; { Bump the length. }
500:
Delay(10, finalTicks); { ... otherwise too quick. }
GOTO 100; { Scroll again. }
{ Fini!! }
600:
ValidRect(box); { No Updates, please }
END; { ScrollText }
{ -------------------------------------------------------- }
{ Scroll PICTure displayed in }
{ the window’s content region: }
{ -------------------------------------------------------- }
PROCEDURE ScrollContents (ctl: ControlHandle; dh, dv: INTEGER);
VAR
oldClip: RgnHandle;
myPic: PicHandle;
gWindPICTrect, kWindPICTrect, oldScrolledRect, newScrolledRect: Rect;
BEGIN
{ GetPort(oldPort); -- we KNOW it’s the passed window. }
{ window := ctl^^.contrlOwner; }
oldClip := NewRgn;
GetClip(oldClip);
myPic := PicHandle(WindowPeek(window)^.refCon);
gWindPICTrect := windPICTrect;
LocalGlobal(gWindPICTrect);
oldScrolledRect := scrolledFullPICTrect;
CreateOffScreenError := CreateOffScreen(oldScrolledRect);
kWindPICTrect := gWindPICTrect;
WITH screenBits.bounds DO { See “DoRotate”. }
OffsetRect(kWindPICTrect, left, top);
IF CreateOffScreenError = noErr THEN
BEGIN
ClipRect(oldScrolledRect); { Same ole stuff ... }
EraseRect(oldScrolledRect);
DrawPicture(myPic, oldScrolledRect);
;
ToOnScreen;
;
{ Scrolling up & down the avenue. }
newScrolledRect := oldScrolledRect;
OffsetRect(newScrolledRect, dh, dv);
OffsetRect(scrolledFullPICTrect, dh, dv); { ... for next time. }
;
BackColor(whiteColor);
ForeColor(blackColor);
ClipRect(kWindPICTrect);
EraseRect(kWindPICTrect); { Erase old image. }
CopyBits(offBitMapPtr^, onScreenBitsPtr^, oldScrolledRect, newScrolledRect,
srcCopy, NIL);
END; { IF CreateOffScreenError = noErr }
DisposOffScreen;
SetPort(window); { Re-group ... }
SetClip(oldClip);
ValidRect(windPICTrect); { NO updates please !! }
DisposeRgn(oldClip);
END; { ScrollContents }
{ ------------------------------------------------------------------------------------------------------------
}
{ Mouse clicked on the line arrows: }
{ }
{ NOTE: As a matter of academic principle, avoid speed }
{ penalities associated with TRAP overhead if possible. }
{ ------------------------------------------------------------------------------------------------------------
}
PROCEDURE UpActionProc (ctl: ControlHandle; part: INTEGER);
VAR
newCtlValue: INTEGER; { # of lines }
dv, dh, difference: INTEGER; { # of pixels }
BEGIN
IF part = 0 THEN { Mouse moved OUTSIDE the Control !! }
EXIT(UpActionProc);
oldCtlValue := ctl^^.contrlValue;
dv := 12; {Vertical, NOT sideways !!}
dh := 0;
difference := (oldCtlValue - ctl^^.contrlMin) * 12;
IF difference = 0 THEN { Prevent flickering. }
EXIT(UpActionProc);
IF difference < dv THEN
dv := difference;
{ Decrement one line’s worth. }
newCtlValue := oldCtlValue - 1;
temp := ctl^^.contrlRect;
{ Just because SetCtlValue is buggy for a Mac II set to }
{ black-and-white. Set to color, it works okay, though? }
InsetRect(temp, 1, 1);
ClipRect(temp);
SetCtlValue(ctl, newCtlValue);
ClipRect(window^.portRect); { Reset. }
IF VertOrHoriz = horizScrollID THEN
BEGIN
dh := dv; {Sideways, NOT vertical !}
dv := 0;
END; { IF }
ScrollContents(ctl, dh, dv);
Delay(8, finalTicks); { ... otherwise too fast. }
END; { UpActionProc }
{ ------------------------------------------------------------------
}
{ Mouse clicked on the line arrows: }
{ ------------------------------------------------------------------
}
PROCEDURE DownActionProc (ctl: ControlHandle; part: INTEGER);
VAR
newCtlValue: INTEGER;
dv, dh, difference: INTEGER;
BEGIN
IF part = 0 THEN { Mouse moved OUTSIDE the Control !! }
EXIT(DownActionProc);
oldCtlValue := ctl^^.contrlValue;
dv := 12; {Vertical, NOT sideways !}
dh := 0;
difference := (ctl^^.contrlMax - oldCtlValue) * 12;
IF difference = 0 THEN { Prevent flickering. }
EXIT(DownActionProc);
IF difference < dv THEN
dv := difference;
{ Bump it one line’s worth. }
newCtlValue := oldCtlValue + 1;
temp := ctl^^.contrlRect;
InsetRect(temp, 1, 1);
ClipRect(temp);
SetCtlValue(ctl, newCtlValue);
ClipRect(window^.portRect); { Reset. }
IF VertOrHoriz = horizScrollID THEN
BEGIN
dh := dv; {Sideways, NOT vertical !}
dv := 0;
END; { IF }
ScrollContents(ctl, -dh, -dv);
Delay(8, finalTicks);
END; { DownActionProc }
{ ------------------------------------------------------ }
{ Our main Scrolling routine: }
{ ------------------------------------------------------ }
PROCEDURE Scroll (ctl: ControlHandle; part: INTEGER; Pt: Point);
{ ------------------------------------------------------------------
}
{ Scroll contents of window to }
{ match pre-set Scroll Bar setting: }
{ ------------------------------------------------------------------
}
PROCEDURE ScrollToThumbPosition (ctl: ControlHandle);
VAR
newCtlValue, dh, dv: INTEGER;
BEGIN
dh := 0;
dv := 0;
newCtlValue := ctl^^.contrlValue;
IF VertOrHoriz = horizScrollID THEN
dh := -(newCtlValue - oldCtlValue) * 12 { Normally, * teLineHite }
ELSE { = vertScrollID }
dv := -(newCtlValue - oldCtlValue) * 12;
ScrollContents(ctl, dh, dv);
Delay(8, finalTicks);
END; { ScrollToThumbPosition }
{ ----------------------------------------------------------------------------------------------
}
{ Thumb goes UP; text, PICTure etc. scrolls DOWN: }
{ ----------------------------------------------------------------------------------------------
}
PROCEDURE DoPageUp (ctl: ControlHandle);
VAR
partControl, newCtlValue, dv, ctlDelta: INTEGER;
newPoint: Point;
BEGIN
WITH window^.portRect DO
BEGIN
IF VertOrHoriz = horizScrollID THEN
dv := right - left - growBoxSize;
{ = (right+1-left) - scrollWidth }
IF VertOrHoriz = vertScrollID THEN
dv := bottom - top - growBoxSize;
{ = (bottom+1-top) - scrollHeight }
END; { WITH window^.portRect }
ctlDelta := dv;
{ Normally divide by teLineHite, a field of TERecord whose }
{ Handle is usually stored in wRefCon field of WindowRecord: }
ctlDelta := (ctlDelta DIV 12) - 1;
{ Leave 1 line }
WHILE StillDown DO
BEGIN
GetMouse(newPoint);
partControl := TestControl(ctl, newPoint);
IF partControl = inPageUp THEN
{ Still INSIDE Control ... }
BEGIN
oldCtlValue := ctl^^.contrlValue;
newCtlValue := oldCtlValue - ctlDelta;
temp := ctl^^.contrlRect;
InsetRect(temp, 1, 1);
ClipRect(temp);
{ Compensates if newCtlValue overshoots ctlMin. }
SetCtlValue(ctl, newCtlValue);
ClipRect(window^.portRect);
ScrollToThumbPosition(ctl);
END; { IF partControl = inPageUp }
END; { WHILE StillDown }
END; { DoPageUp }
{ ----------------------------------------------------------------------------------------------
}
{ Thumb goes DOWN; text, PICTure etc. scrolls UP: }
{ ----------------------------------------------------------------------------------------------
}
PROCEDURE DoPageDown (ctl: ControlHandle);
VAR
partControl, newCtlValue, dv, ctlDelta: INTEGER;
newPoint: Point;
BEGIN
WITH window^.portRect DO
BEGIN
IF VertOrHoriz = horizScrollID THEN
dv := right - left - growBoxSize
ELSE { = vertScrollID }
dv := bottom - top - growBoxSize;
END; { WITH window^.portRect }
ctlDelta := (dv DIV 12) - 1;
WHILE StillDown DO
BEGIN
GetMouse(newPoint);
partControl := TestControl(ctl, newPoint);
IF partControl = inPageDown THEN
{ Still INSIDE Control ... }
BEGIN
oldCtlValue := ctl^^.contrlValue;
newCtlValue := oldCtlValue + ctlDelta;
temp := ctl^^.contrlRect;
InsetRect(temp, 1, 1);
ClipRect(temp);
{ Compensates if newCtlValue overshoots ctlMax. }
SetCtlValue(ctl, newCtlValue);
ClipRect(window^.portRect);
ScrollToThumbPosition(ctl);
END; { IF partControl = inPageDown }
END; { WHILE StillDown }
END; { DoPageDown }
BEGIN { Scroll }
window := ctl^^.contrlOwner;
SetPort(window);
VertOrHoriz := ctl^^.contrlRFcon; {Up/Down or sideways??}
oldCtlValue := GetCtlValue(ctl);
CASE part OF
inUpButton:
stillThere := TrackControl(ctl, Pt, @UpActionProc);
inDownButton:
stillThere := TrackControl(ctl, Pt, @DownActionProc);
inPageUp:
DoPageUp(ctl);
inPageDown:
DoPageDown(ctl);
inThumb:
BEGIN
temp := ctl^^.contrlRect;
InsetRect(temp, 1, 1);
ClipRect(temp);
IF TrackControl(ctl, Pt, NIL) <> 0 THEN
ScrollToThumbPosition(ctl);
ClipRect(window^.portRect); { Reset. }
END; { InThumb }
OTHERWISE
BEGIN
END; { OTHERWISE }
END; { CASE }
END; { Scroll }
------------------------------------------------------ }
{ Does she or doesn’t she ?? }
{ ---------------------------------------------------- }
FUNCTION DrawMyControl (ctl: ControlHandle): BOOLEAN;
BEGIN
IF (ctl <> NIL) & (ctl^^.contrlMax > ctl^^.contrlMin) THEN
DrawMyControl := TRUE
ELSE
DrawMyControl := FALSE;
END; { DrawMyControl }
{ ---------------------------------------------------------------- }
{ Retrieve Control Handle, if any: }
{ ---------------------------------------------------------------- }
FUNCTION ScrollHoriz (windPtr: WindowPtr): ControlHandle;
VAR
ourControl: ControlHandle;
BEGIN
ourControl := WindowPeek(windPtr)^.controlList;
WHILE ourControl <> NIL DO
BEGIN
IF ourControl^^.contrlRFcon = horizScrollID THEN
LEAVE;
ourControl := ourControl^^.nextControl;
END; { WHILE ourControl <> NIL }
ScrollHoriz := ourControl;
END; { ScrollHoriz }
FUNCTION ScrollVert (windPtr: WindowPtr): ControlHandle;
VAR
ourControl: ControlHandle;
BEGIN
ourControl := WindowPeek(windPtr)^.controlList;
WHILE ourControl <> NIL DO
BEGIN
IF ourControl^^.contrlRFcon = vertScrollID THEN
LEAVE;
ourControl := ourControl^^.nextControl;
END; { WHILE }
ScrollVert := ourControl;
END; { ScrollVert }
{ ------------------------------------ }
{ Hello, or GoodBye: }
{ ------------------------------------ }
PROCEDURE ScrollShow (windPtr: WindowPtr);
VAR
ctlHndl: ControlHandle;
BEGIN
ctlHndl := ScrollVert(windPtr);
IF DrawMyControl(ctlHndl) THEN {Tests for NIL ctlHndl.}
ShowControl(ctlHndl);
{ ---------- }
ctlHndl := ScrollHoriz(windPtr);
;
IF DrawMyControl(ctlHndl) THEN
ShowControl(ctlHndl);
END; { ScrollShow }
PROCEDURE ScrollHide (windPtr: WindowPtr);
VAR
ctlHndl: ControlHandle;
BEGIN
ctlHndl := ScrollVert(windPtr);
IF DrawMyControl(ctlHndl) THEN
HideControl(ctlHndl);
{ ---------- }
ctlHndl := ScrollHoriz(windPtr);
;
IF DrawMyControl(ctlHndl) THEN
HideControl(ctlHndl);
END; { ScrollHide }
{ ----------------------------------------------------------------------------------------------------
}
{ Explicitly include the Scroll Bars in the window’s }
{ Update region. This Update region will purposely }
{ overlap the Grow Box. }
{ ----------------------------------------------------------------------------------------------------
}
PROCEDURE InvalidScroll (windPtr: WindowPtr);
VAR
updateRect: rect;
BEGIN
IF DrawMyControl(ScrollVert(windPtr)) THEN
BEGIN
updateRect := windPtr^.portRect;
InsetRect(updateRect, -1, -1); { Include window frame. }
updateRect.left := updateRect.right - scrollWidth;
InvalRect(updateRect);
END; { IF }
IF DrawMyControl(ScrollHoriz(windPtr)) THEN
BEGIN
updateRect := windPtr^.portRect;
InsetRect(updateRect, -1, -1);
updateRect.top := updateRect.bottom - scrollHeight;
InvalRect(updateRect);
END; { IF }
END; { InvalidScroll }
PROCEDURE ValidScroll (windPtr: WindowPtr);
VAR
updateRect: rect;
BEGIN
IF DrawMyControl(ScrollVert(windPtr)) THEN
BEGIN
updateRect := windPtr^.portRect;
InsetRect(updateRect, -1, -1);
updateRect.left := updateRect.right - scrollWidth;
ValidRect(updateRect);
END; { IF }
IF DrawMyControl(ScrollHoriz(windPtr)) THEN
BEGIN
updateRect := windPtr^.portRect;
InsetRect(updateRect, -1, -1);
updateRect.top := updateRect.bottom -
scrollHeight;
ValidRect(updateRect);
END; { IF }
END; { ValidScroll }
PROCEDURE ScrollResize (windPtr: WindowPtr);
VAR
contentRect: Rect;
ctlHndl: ControlHandle;
ctlWidth, ctlHeight, ctlTop, ctlLeft: INTEGER;
BEGIN
contentRect := windPtr^.portRect;
{ Remember, the portRect does NOT include the window frame, }
{ whereas the Scroll Bar and Grow Box sizes do: }
InsetRect(contentRect, -1, -1);
ClipRect(contentRect); { Sigh !! }
ScrollHide(windPtr); { Hide-and-Go Seek !! }
ctlHndl := ScrollVert(windPtr);
IF ctlHndl <> NIL THEN
BEGIN
WITH contentRect DO
BEGIN
ctlHeight := bottom - top - growBoxSize;
ctlTop := top;
ctlLeft := right - scrollWidth;
END; { WITH contentRect }
SizeControl(ctlHndl, scrollWidth, ctlHeight);
MoveControl(ctlHndl, ctlLeft, ctlTop);
END; { IF ctlHndl <> NIL }
{ ---------- }
ctlHndl := ScrollHoriz(windPtr);
IF ctlHndl <> NIL THEN
BEGIN
WITH contentRect DO
BEGIN
ctlWidth := right - left - growBoxSize;
ctlTop := bottom - scrollHeight;
ctlLeft := left;
END; { WITH contentRect }
SizeControl(ctlHndl, ctlWidth, scrollHeight);
MoveControl(ctlHndl, ctlLeft, ctlTop);
END; { IF ctlHndl <> NIL }
ScrollShow(windPtr);{ Peek-a-Boo !! }
ValidScroll(windPtr);
ClipRect(windPtr^.portRect); { Reset. }
END; { ScrollResize }
{ --------------------------------------------------------------------------------------------------------------
}
{ Set ONLY the maximum value(s) because the attached CNTL }
{ resources(s) specify the minimum -- generally zero. }
{ --------------------------------------------------------------------------------------------------------------
}
PROCEDURE SetMaxCtls (windPtr: WindowPtr);
VAR
oldClip: RgnHandle;
ctlHndl: ControlHandle;
dest, view: INTEGER;
PROCEDURE SetMaxCtlValue (ctl: ControlHandle; excess: INTEGER);
VAR
maxValue: INTEGER;
temp: Rect;
BEGIN
IF excess <= 0 THEN
maxValue := ctl^^.contrlMin
{ Inactivates Control since max = min. }
ELSE { PICTure taller than window }
maxValue := (excess + 11) DIV 12;
{ ... by this much [rounded up]. }
IF maxValue <> ctl^^.contrlMax THEN
BEGIN
temp := ctl^^.contrlRect;
InsetRect(temp, 1, 1);
ClipRect(temp);
SetCtlMax(ctl, maxValue);
END;
END; { SetMaxCtlValue }
BEGIN { SetMaxCtls }
oldClip := NewRgn;
GetClip(oldClip);
ctlHndl := ScrollVert(windPtr);
IF ctlHndl <> NIL THEN
BEGIN
WITH windPICTrect DO { from my GetPicRects Proc. }
view := bottom - top;
WITH fullPICTrect DO { Ditto. }
dest := bottom - top;
SetMaxCtlValue(ctlHndl, dest - view);
END; { IF ctlHndl <> NIL }
{ ---------- }
ctlHndl := ScrollHoriz(windPtr);
IF ctlHndl <> NIL THEN
BEGIN
WITH windPICTrect DO
view := right - left;
WITH fullPICTrect DO
dest := right - left;
SetMaxCtlValue(ctlHndl, dest - view);
END; { IF ctlHndl <> NIL }
SetClip(oldClip);
DisposeRgn(oldClip);
END; { SetMaxCtls }
{ --------------------------------------------------------------------
}
{ Called by the “HandleMouse” PROC: }
{ --------------------------------------------------------------------
}
PROCEDURE SetCtlsToMin (windPtr: WindowPtr);
VAR
oldClip: RgnHandle;
PROCEDURE SetCtlValueToMin (ctl: ControlHandle);
VAR
temp: Rect;
BEGIN
IF ctl = NIL THEN
EXIT(SetCtlValueToMin);
temp := ctl^^.contrlRect;
InsetRect(temp, 1, 1); {See comments in “UpActionProc”.}
ClipRect(temp);
SetCtlValue(ctl, GetCtlMin(ctl));
END; { SetCtlValueToMin }
BEGIN { SetCtlsToMin }
oldClip := NewRgn;
GetClip(oldClip);
;
SetCtlValueToMin(ScrollHoriz(windPtr));
SetCtlValueToMin(ScrollVert(windPtr));
;
SetClip(oldClip);
DisposeRgn(oldClip);
END; { SetCtlsToMin }
END. { UNIT = rotScrollSubs }
Listing: rotWindowSubs.p
UNIT rotWindowSubs;
INTERFACE
USES
Palettes, rotInterface, rotGlobals, rotMiscSubs, rotScrollSubs;
FUNCTION GetWindowPartColor (window: WindowPtr; part: INTEGER; VAR color:
RGBColor): BOOLEAN;
PROCEDURE SetWindowPalette (wPtr: WindowPtr; plttID: INTEGER);
PROCEDURE CalcWindowFrame (window: WindowPtr; VAR r: Rect);
PROCEDURE DisplayWindow (window: WindowPtr);
PROCEDURE CloseOurWindow (wPtr: WindowPtr);
PROCEDURE DoCloseAll;
PROCEDURE ZoomRect (sourceR, destR: Rect);
IMPLEMENTATION
{ ---------------------------------------- }
{ Finder’s keepers ... }
{ ---------------------------------------- }
FUNCTION GetWindowPartColor (window: WindowPtr; part: INTEGER; VAR color:
RGBColor): BOOLEAN;
VAR
auxWindowHdl: AuxWinHndl;
windowCTab: CTabHandle;
BEGIN
{ Assume NADA !! }
GetWindowPartColor := FALSE;
IF GetAuxWin(window, auxWindowHdl) THEN
BEGIN
windowCTab := auxWindowHdl^^.awCTable;
IF (part < 0) | (part > windowCTab^^.ctSize) THEN
{ Color me paranoid !! }
EXIT(GetWindowPartColor);
color := windowCTab^^.ctTable[part].rgb;
GetWindowPartColor := TRUE;
END; { IF window has a AuxWinRec }
END; { GetWindowPartColor }
{ ---------------------------------------------- }
{ ... in living Color !! }
{ ---------------------------------------------- }
PROCEDURE SetWindowPalette (wPtr: WindowPtr; plttID: INTEGER);
VAR
pal: PaletteHandle;
BEGIN
IF NOT aMac2 THEN
EXIT(SetWindowPalette);
pal := GetNewPalette(plttID);
IF Handle(pal) <> NIL THEN
BEGIN
SetPalette(wPtr, pal, TRUE);
ActivatePalette(wPtr);
END; { IF Handle(pal) <> NIL }
END; { SetWindowPalette }
{ ------------------------------------------------------------------------
}
{ CanNOT use the “structRgn” field of }
{ window since this region hdl will be }
{ NIL if the window is NOT visible. }
{ ------------------------------------------------------------------------
}
PROCEDURE CalcWindowFrame (window: WindowPtr; VAR r: Rect);
CONST
frame = 1;
shadow = 1;
title = 18;
VAR
windDef: INTEGER;
BEGIN
windDef := GetWVariant(window);
r := window^.portRect;
InsetRect(r, -frame, -frame);
IF (windDef = 0) OR (windDef > 3) THEN
r.top := r.top - title; { Window has a title bar. }
IF (windDef = documentProc) OR (windDef = altDBoxProc) OR (windDef =
noGrowDocProc) OR (windDef = zoomDocProc) THEN
BEGIN
r.bottom := r.bottom + shadow;
r.right := r.right + shadow;
END; { Window has a shadow frame. }
END; { CalcWindowFrame }
{ ---------------------------------------------------- }
{ Before showing the window, }
{ center it on the screen. }
{ ---------------------------------------------------- }
PROCEDURE DisplayWindow (window: WindowPtr);
CONST
frame = 1;
{ shadow = 1; - considered within CalcWindowFrame PROC }
title = 18;
VAR
wFrameRect: rect;
temp: INTEGER;
Pt: Point;
BEGIN
CalcWindowFrame(window, wFrameRect);
;
windDef := GetWVariant(window); { In DoActivate, also. }
WITH screen DO
temp := bottom - top;
WITH wFrameRect DO
temp := temp - (bottom - top); { screen ht - window ht }
{ temp := temp + mBarHt; -- NO!! because }
{ screen based on GrayRgn, NOT screenBits. }
temp := temp DIV 2;
temp := temp + frame;
IF (windDef = 0) OR (windDef > 3) THEN
temp := temp + title; { Window has a title bar. }
Pt.v := screen.top + temp;
{ ---------- }
WITH screen DO
temp := right - left;
WITH wFrameRect DO
temp := temp - (right - left); { screen - window width }
Pt.h := screen.left + temp DIV 2;
MoveWindow(window, Pt.h, Pt.v, TRUE);
ShowWindow(window);
ScrollResize(window);
END; { DisplayWindow }
{ ---------------------------------------------- }
{ One at a time, folks !! }
{ ---------------------------------------------- }
PROCEDURE CloseOurWindow (wPtr: WindowPtr);
VAR
myPic: PicHandle;
pal: PaletteHandle;
aux: BOOLEAN;
auxWind: AuxWinHndl;
BEGIN
IF aMac2 THEN
BEGIN
pal := GetPalette(wPtr);
IF pal <> NIL THEN
DisposePalette(pal);
aux := GetAuxWin(wPtr, auxWind);
IF aux THEN
ReleaseResource(Handle(auxWind));
END; { IF aMac2 }
myPic := GetWindowPic(wPtr);
IF myPic <> NIL THEN
BEGIN
HUnlock(Handle(myPic));
ReleaseResource(Handle(myPic));
END; { IF myPic <> NIL }
horizControl := ScrollHoriz(wPtr);
IF horizControl <> NIL THEN
{ Calls ReleaseResource(Handle(AuxCtlHndl)); }
DisposeControl(horizControl);
{ -------- }
vertControl := ScrollVert(wPtr);
IF vertControl <> NIL THEN
DisposeControl(vertControl);
{ -------- }
DisposeWindow(wPtr);
END; { CloseOurWindow }
{ --------------------------------------------------------------------------------------------------------
}
{ DoCloseAll is called from the “Quit” command on the }
{ main Menu, and when we close our main window. }
{ --------------------------------------------------------------------------------------------------------
}
PROCEDURE DoCloseAll;
VAR
window: WindowPeek;
BEGIN
window := WindowPeek(FrontWindow);
WHILE window <> NIL DO
BEGIN
IF window^.windowKind < 0 THEN
CloseDeskAcc(window^.windowKind)
ELSE
CloseOurWindow(WindowPtr(window));
window := window^.nextWindow;
END; { WHILE window <> NIL }
END; { DoCloseAll }
PROCEDURE ZoomRect (sourceR, destR: Rect); {Global coords}
CONST
DragPatternLoc = $A34;
pixPatID = 128;
VAR
oldPort: GrafPtr;
oldWindow: WindowPtr;
bigGrafPort: GrafPort;
bigGrafPtr: GrafPtr;
bigCGrafPort: CGrafPort;
bigCGrafPtr: CGrafPtr;
union, srcRect, dstRect, box: Rect;
increment, delTop, delLeft, delBottom, delRight, i: INTEGER;
aux: BOOLEAN;
frameColor: RGBColor;
bwDragPattern: Pattern;
cDragPattern: PixPatHandle;
BEGIN
IF EqualRect(sourceR, destR) THEN
EXIT(ZoomRect);
UnionRect(sourceR, destR, union);
IF (NOT EqualRect(union, sourceR)) & (NOT EqualRect(union, destR)) THEN
EXIT(ZoomRect); { One does NOT enclose the other !! }
GetPort(oldPort);
oldWindow := FrontWindow;
IF (oldWindow <> NIL) & (colorDepth > 1) THEN
aux := GetWindowPartColor(oldWindow, wFrameColor, frameColor);
IF colorDepth = 1 THEN
BEGIN
bigGrafPtr := @bigGrafPort;
OpenPort(bigGrafPtr);
SetPort(bigGrafPtr);
END { IF colorDepth = 1 }
ELSE
BEGIN
bigCGrafPtr := @bigCGrafPort;
OpenCPort(bigCGrafPtr);
SetPort(GrafPtr(bigCGrafPtr));
END;
srcRect := sourceR;
dstRect := destR;
GlobalLocal(srcRect);
GlobalLocal(dstRect);
increment := 5;
delTop := (dstRect.top - srcRect.top) DIV increment;
delLeft := (dstRect.left - srcRect.left) DIV increment;
delBottom := (dstRect.bottom - srcRect.bottom) DIV increment;
delRight := (dstRect.right - srcRect.right) DIV increment;
bwDragPattern := PatPtr(DragPatternLoc)^;
PenPat(bwDragPattern); { My default state ... }
PenMode(patXor);
IF colorDepth > 1 THEN { in color }
BEGIN
cDragPattern := GetPixPat(pixPatID);
IF cDragPattern <> NIL THEN
BEGIN
IF (oldWindow <> NIL) & aux THEN
MakeRGBPat(cDragPattern, frameColor);
PenPixPat(cDragPattern);
END; { IF cDragPattern <> NIL }
END; { in color }
{ Start AWAY from source AND stop short of destination. }
box := srcRect;
FOR i := 1 TO (increment - 1) DO
BEGIN
WITH box DO
SetRect(box, left + delLeft, top + delTop, right + delRight, bottom
+ delBottom);
FrameRect(box);
;
Delay(15, finalTicks); { Hang on, Mac !! }
END; { FOR }
PenNormal;
IF colorDepth > 1 THEN
BEGIN
CloseCPort(bigCGrafPtr);
{ Done by _CloseCPort: }
{ IF cDragPattern <> NIL THEN }
{ DisposPixPat(cDragPattern); }
END
ELSE { B&W }
ClosePort(bigGrafPtr);
SetPort(oldPort);
END; { ZoomRect }
END. { UNIT = rotWindowSubs }
Listing: Rotate.p
PROGRAM Rotate;
{$I-}
USES
Palettes, rotInterface, rotGlobals, rotMiscSubs, OffscreenSubs, rotScrollSubs,
rotWindowSubs;
LABEL
100;
{ ---------------------------------------------- }
{ Guess what this does ?? }
{ ---------------------------------------------- }
PROCEDURE HandleCursor;
VAR
mouse: Point;
CURS_Hdl: CursHandle;
BEGIN
IF daWind OR NOT InForeGround THEN
EXIT(HandleCursor);
{ DAs & other applications roll their own }
GetMouse(mouse);
IF PtInRect(mouse, FrontWindow^.portRect) THEN
BEGIN
InWindow := TRUE;
;
IF aMac2 THEN
BEGIN
IF colorHandCrsr <> NIL THEN {Activate Event 1st! }
IF NOT stillColorCrsr THEN { ROM problem. }
BEGIN
SetCCursor(colorHandCrsr);
stillColorCrsr := TRUE;
END; { IF...IF }
END { IF aMac2 }
ELSE { NOT aMac2 }
InitCursor;
END { IF PtInRect(...) }
ELSE { NOT PtInRect() }
BEGIN
InWindow := FALSE;
InitCursor;
stillColorCrsr:= FALSE
END; { ELSE }
END; { HandleCursor }
{ ------------------------------------------ }
{ To be or not to be !! }
{ ------------------------------------------ }
PROCEDURE SetEnable (menu: MenuHandle; item: INTEGER; enabled: BOOLEAN);
BEGIN
IF enabled THEN
EnableItem(menu, item)
ELSE
DisableItem(menu, item);
END; { SetEnable }
{ --------------------------------------------------------------------------------------------------------------
}
{ PeriodicMenus is called before action is taken on menu }
{ commands to correctly enable or disable the “Edit” Menu }
{ in case a Desk Accessory owns the front window or no }
{ window is up, respectively. The latter affects }
{ individual items in other Menu(s). }
{----------------------------------------------------------------------------------------------------------------
}
PROCEDURE PeriodicMenus;
VAR
FW: WindowPeek;
BEGIN
FW := WindowPeek(FrontWindow);
daWind := (FW <> NIL) & (FW^.windowKind < 0);
{ Used by HandleCursor. }
applWind := (FW <> NIL) & (NOT daWind);
IF applWind <> currGraphics THEN
{ No need to repeat yourself !! }
BEGIN
SetEnable(GraphicsMenu, RotateItem, applWind);
SetEnable(GraphicsMenu, DissolveItem, applWind);
currGraphics := applWind; { Reset. }
END;
IF daWind = currEdit THEN
{ Avoid a flickering Menu Bar. }
EXIT(PeriodicMenus);
currEdit := daWind; { Reset. }
IF daWind THEN { the WHOLE thing !! }
EnableItem(EditMenu, 0)
ELSE
DisableItem(EditMenu, 0);
DrawMenuBar;
END; { PeriodicMenus }
{ -------------------- }
{ Bye-Bye !! }
{ -------------------- }
PROCEDURE DoQuit;
BEGIN
HUnlock(Handle(monsterPicHdl));
ReleaseResource(Handle(monsterPicHdl));
IF aMac2 & (colorHandCrsr <> NIL) THEN
DisposCCursor(colorHandCrsr);
DoCloseAll;
Done := TRUE;
END; { DoQuit }
{ ---------------- }
{ Enjoy !! }
{ ---------------- }
PROCEDURE SpiffyRoll;
LABEL
100, 200, 300;
VAR
bragging: WindowPtr;
logoPicHdl: PicHandle;
bragRect: Rect;
tempX, tempY: INTEGER;
rollRect: Rect;
maskPercent: INTEGER;
BEGIN
{ I get here ONLY when I have a window. }
bragging := FrontWindow;
IF bragging = NIL THEN { ... but just in case !! }
GOTO 300;
logoPicHdl := PicHandle(GetWRefCon(bragging));
IF logoPicHdl = NIL THEN
GOTO 200;
bragRect := bragging^.portRect;
WITH bragRect DO
BEGIN
IF (ScrollVert(bragging) <> NIL) | (ScrollHoriz(bragging) <> NIL) THEN
BEGIN
right := (right + 1) - scrollWidth;
bottom := (bottom + 1) - scrollHeight;
END; { IF there are Scroll Bar(s) }
tempX := right - left;
tempY := bottom - top;
END; { WITH bragRect }
{ Because I know my WINDow & PICT sizes, }
{ tempX & tempY are always > 0: }
WITH logoPicHdl^^.picFrame DO
BEGIN
tempX := tempX - (right - left);
tempY := tempY - (bottom - top);
END; { WITH logoPicHdl^^.picFrame }
WITH bragRect DO
BEGIN
top := top + tempY DIV 2;
bottom := top + (logoPicHdl^^.picFrame.bottom - logoPicHdl^^.picFrame.top);
left := left + tempX DIV 2;
right := left + (logoPicHdl^^.picFrame.right - logoPicHdl^^.picFrame.left);
END; { WITH bragRect }
{ ------------------------------------------------ }
{ Place my PICTure into an }
{ off screen BitMap. }
{ ------------------------------------------------ }
{ Local window coordinates are input; }
{ local screen coordinates are returned.}
CreateOffScreenError := CreateOffScreen(bragRect);
IF CreateOffScreenError <> noErr THEN
GOTO 100;
ClipRect(bragRect); { Draw off-screen. }
EraseRect(bragRect); { Eliminate all stray matter. }
DrawPicture(logoPicHdl, bragRect);
ToOnScreen; { Back to “Square 1”. }
BackColor(whiteColor);
ForeColor(blackColor);
{ ---------- }
ClipRect(bragRect);
rollRect := bragRect;
maskPercent := 1;
WHILE maskPercent <= 100 DO
BEGIN
WITH bragRect DO
rollRect.bottom := top + ((bottom - top) * maskPercent) DIV 100;
CopyBits(offBitMapPtr^, onScreenBitsPtr^, rollRect, rollRect, srcCopy,
NIL);
IF colorDepth = 1 THEN
Delay(10, finalTicks) { Black-and-white too doggone fast !! }
ELSE
Delay(7, finalTicks); { Color a tad better. }
maskPercent := maskPercent + 1;
END; { WHILE maskPercent <= 100 }
{ ---------- }
Delay(240, finalTicks); {Take a gander at its beauty !!}
100:
DisposOffScreen;
HUnlock(Handle(logoPicHdl));
ReleaseResource(Handle(logoPicHdl));
200:
CloseOurWindow(bragging); {Activates window behind it.}
300:
RemoveVBLTask;
SysBeep(10); { Wake Up Call !! }
END; { SpiffyRoll }
{ -------------------------------------------------------- }
{ Now for Mike Morton’s spiffy }
{ dissolve stuff ... }
{ -------------------------------------------------------- }
PROCEDURE SpiffyDissolve;
LABEL
100, 200;
VAR
oldPort: GrafPtr;
gigantorPicHdl: picHandle;
gigantorRect: Rect;
tempX, tempY: INTEGER;
offBitMap, onScreenBits: BitMap;
BEGIN
GetPort(oldPort);
IF colorDepth > 1 THEN
gigantorPicHdl := GetPicture(colorGigantorID)
{ They’re SO ugly, they’re cute !! }
ELSE
gigantorPicHdl := GetPicture(bwGigantorID);
IF gigantorPicHdl = NIL THEN
GOTO 200;
HLock(Handle(gigantorPicHdl));
WITH gigantorPicHdl^^.picFrame DO
{ First, center the PICTure ... }
BEGIN
tempX := right - left;
tempY := bottom - top;
END;
WITH oldPort^.portRect DO
BEGIN
tempX := right - left - tempX;
tempX := left + tempX DIV 2;
tempY := bottom - top - tempY;
tempY := top + tempY DIV 2;
END;
{ I KNOW that the portRect of the attached WINDow is larger }
{ than the PICT, so I did NOT need to test above for fit. }
WITH gigantorRect DO
BEGIN
top := tempY;
left := tempX;
bottom := top + gigantorPicHdl^^.picFrame.bottom - gigantorPicHdl^^.picFrame.top;
right := left + gigantorPicHdl^^.picFrame.right - gigantorPicHdl^^.picFrame.left;
END;
{ --------------------------------------------------------------------------------------
}
{ Place my PICTure into an off screen BitMap }
{ --------------------------------------------------------------------------------------
}
CreateOffScreenError := CreateOffScreen(gigantorRect);
IF CreateOffScreenError <> noErr THEN
GOTO 100;
ClipRect(gigantorRect); { Draw off-screen ... }
EraseRect(gigantorRect);
DrawPicture(gigantorPicHdl, gigantorRect);
ToOnScreen; { Then, back to “Square 1” ... }
ClipRect(gigantorRect);
{ So funny colorization doesn’t happen. }
BackColor(whiteColor);
ForeColor(blackColor);
DissBits(offBitMapPtr^, onScreenBitsPtr^, gigantorRect, gigantorRect);
{ -------------------------------------------------------------- }
{ Now, wasn’t that neat, folks !! }
{ -------------------------------------------------------------- }
100:
DisposOffScreen;
SetPort(oldPort);
HUnlock(Handle(gigantorPicHdl));
ReleaseResource(Handle(gigantorPicHdl));
200:
Delay(60, finalTicks);
END; { SpiffyDissolve }
{ --------------------------------------------------------------------------
}
{ DoApple is the code for the “Apple” }
{ Menu. The other two Menus follow. }
{ NOTE: CanNOT use “TheWindow” from the }
{ FindWindow call in the MainEventLoop }
{ because TheWindow = NIL for a }
{ windowLoc = inMenuBar: }
{ --------------------------------------------------------------------------
}
PROCEDURE DoApple (item: INTEGER);
CONST
MyString = ‘Programming by I•A•C•S Software and John A. Love, III of
the Washington Apple Pi Users’ Group’;
VAR
oldPort: GrafPtr;
window, bragging: WindowPtr;
logoPicHdl: PicHandle;
skipScroll: BOOLEAN;
scrollStr: Str255;
IACSBuffer: QDPtr;
IACSBox: Rect;
tempX, tempY: INTEGER;
accName: Str255;
accNumber: INTEGER;
oldForeColor, oldBackColor, contentColor: RGBColor;
BEGIN
CASE item OF
AboutItem:
BEGIN
IF NOT applWind THEN { NO window. }
EXIT(DoApple);
skipScroll := FALSE; { Everything's cool !! }
window := FrontWindow;
{ Determine the visible part of the window's }
{ content region, LESS any Scroll Bar(s): }
IACSBox := window^.portRect; { For starters ... }
;
WITH IACSBox DO
BEGIN
IF (ScrollVert(window) <> NIL) | (ScrollHoriz(window) <> NIL) THEN
BEGIN
right := (right + 1) - scrollWidth;
bottom := (bottom + 1) - scrollHeight;
END; { IF }
END; { WITH IACSBox }
;
LocalGlobal(IACSBox);
WITH screenBits.bounds DO
BEGIN
IF IACSBox.top < top THEN
IACSBox.top := top;
IF IACSBox.left < left THEN
IACSBox.left := left;
IF IACSBox.bottom > bottom THEN
IACSBox.bottom := bottom;
IF IACSBox.right > right THEN
IACSBox.right := right;
END; { WITH screenBits.bounds }
GlobalLocal(IACSBox);
;
WITH IACSBox DO
BEGIN
tempX := right - left;
tempY := bottom - top;
top := top + (tempY - 20) DIV 2;
bottom := top + 20;
left := left + 10;
right := right - 10;
END;
;
IF (tempX < 40) OR (tempY < 20) THEN
skipScroll := TRUE; { NOT wide or tall enough !! }
InstallVBLTask(acurWorld);
{ ========== }
IF NOT skipScroll THEN
BEGIN
scrollStr := MyString;
IACSBuffer := QDPtr(ORD4(@scrollStr));
IF colorDepth > 1 THEN
BEGIN
GetBackColor(oldBackColor);
PmBackColor(pmLtGray);
GetForeColor(oldForeColor);
PmForeColor(pmRed);
END; { IF colorDepth > 1 }
ScrollText(IACSBuffer, IACSBox); { ********** }
IF colorDepth > 1 THEN
BEGIN
IF GetWindowPartColor(window, wContentColor, contentColor) THEN
RGBBackColor(contentColor)
ELSE
RGBBackColor(oldBackColor);
RGBForeColor(oldForeColor);
END; { IF colorDepth > 1 }
;
EraseRect(IACSBox); { In above background color. }
InvalRect(IACSBox); { --> an Update Event. }
END; { IF NOT skipScroll }
{ ========== }
bragging := GetNewWindow(logoWindowID, NIL, WindowPtr(-1));
{ ////////// }
IF bragging <> NIL THEN
BEGIN
logoPicHdl := GetPicture(logoID);
SetWRefCon(bragging, LONGINT(logoPicHdl)); { Save for retrieval in
"SpiffyRoll". }
IF logoPicHdl <> NIL THEN
BEGIN
HLock(Handle(logoPicHdl));
;
SetPort(bragging);
DisplayWindow(bragging);
;
justBragging := TRUE;
ValidRect(bragging^.portRect); { ... so we don't draw in the darn
thing !! }
END; { IF logoPicHdl <> NIL }
END; { IF bragging <> NIL }
{ ////////// }
END; { AboutItem }
{ NEVER seen -- shown for completeness, only. }
AdisabledItem:
BEGIN
END; { AdisabledItem }
OTHERWISE
BEGIN
GetPort(oldPort);
;
GetItem(AppleMenu, item, accName);
accNumber := OpenDeskAcc(accName);
;
SetPort(oldPort);
END; { OTHERWISE }
END; { CASE...OF }
END; { DoApple }
PROCEDURE DoEdit (item: INTEGER);
BEGIN
IF SystemEdit(item - 1) THEN
EXIT(DoEdit); { DAs do their own thing !! }
CASE item OF
UndoItem, EdisabledItem, CutItem, CopyItem, PasteItem, ClearItem:
BEGIN
END;
END; { CASE...OF }
END; { DoEdit }
{ --------------------------------------------------------------------------------------------
}
{ Jon Zap definitely scored a homer on this one: }
{ This is truly a journey into CopyBits ‘Hell’ }
{ --------------------------------------------------------------------------------------------
}
PROCEDURE DoGraphics (item: INTEGER);
LABEL
100, 200;
VAR
oldPort: GrafPtr;
kFullPICTrect, gWindPICTrect, kWindPICTrect: Rect; {g:global & k:local}
offBitMap, rotBitMap1, rotBitMap2,
rotBitMap3, rotBitMap4: BitMap;
rotBitMapPtr1, rotBitMapPtr2,
rotBitMapPtr3, rotBitMapPtr4: BitMapPtr;
onScreenRgn: Rgnhandle;
copyRect: Rect;
myRotHdl1, myRotHdl2, myRotHdl3, myRotHdl4: Handle;
rotPixMap1, rotPixMap2,
rotPixMap3, rotPixMap4: PixMapHandle;
err: OSErr;
toooooFast: BOOLEAN;
PROCEDURE ErrorOut (iteration: INTEGER; rotBitMap: BitMap; error: OSErr);
VAR
rotHandle: Handle;
BEGIN
IF iteration > 1 THEN
{ Disposes of stuff even if NO error. }
BEGIN
rotHandle := RecoverHandle(rotBitMap.baseAddr);
HUnlock(rotHandle);
DisposHandle(rotHandle);
END; { IF }
IF error = memFullErr THEN
GOTO 100;
END; { ErrorOut }
BEGIN { DoGraphics }
CASE item OF
RotateItem:
BEGIN
IF NOT applWind THEN { Whoops !! }
EXIT(DoRotate);
GetPort(oldPort); { Where in the ?!*!? are we }
{ ------------------------------------------------------------------------
}
{ Place my PICTure into an off screen }
{ BitMap so we can rotate this dude !! }
{ }
{ ... should be old-hat by now. }
{ ------------------------------------------------------------------------
}
SetPort(FrontWindow);
InstallVBLTask(acurDogCow);
{ Round-and-around she goes ... }
{ We’re about to switch the Port off-screen: }
{ NOTE: keep original rects intact by using copies. }
kFullPICTrect := scrolledFullPICTrect;
gWindPICTrect := windPICTrect;
LocalGlobal(gWindPICTrect);
CreateOffScreenError := CreateOffScreen(kFullPICTrect);
IF CreateOffScreenError <> noErr THEN
GOTO 200;
offBitMap := offBitMapPtr^;
{ We canNOT call _GlobalToLocal here because we’ve changed }
{ the portBits.bounds rect of our off-screen port within }
{ “CreateOffScreen”. See “_GlobalToLocal” within Inside Mac. }
kWindPICTrect := gWindPICTrect;
WITH screenBits.bounds DO { Bounds BEFORE change. }
OffsetRect(kWindPICTrect, left, top);
IF colorDepth > 1 THEN
BEGIN
rotPixMap1 := NewPixMap; { Everything but the Color Table. It comes
next ...}
CopyPixMap(offCGrafPtr^.portPixMap, rotPixMap1);
rotBitMapPtr1 := BitMapPtr(rotPixMap1^);
;
rotPixMap2 := NewPixMap;
CopyPixMap(offCGrafPtr^.portPixMap, rotPixMap2);
rotBitMapPtr2 := BitMapPtr(rotPixMap2^);
;
rotPixMap3 := NewPixMap;
CopyPixMap(offCGrafPtr^.portPixMap, rotPixMap3);
rotBitMapPtr3 := BitMapPtr(rotPixMap3^);
;
rotPixMap4 := NewPixMap;
CopyPixMap(offCGrafPtr^.portPixMap, rotPixMap4);
rotBitMapPtr4 := BitMapPtr(rotPixMap4^);
END { IF colorDepth > 1 }
ELSE
BEGIN
rotBitMapPtr1 := BitMapPtr(NewClearPtr(SIZEOF(BitMap)));
rotBitMapPtr2 := BitMapPtr(NewClearPtr(SIZEOF(BitMap)));
rotBitMapPtr3 := BitMapPtr(NewClearPtr(SIZEOF(BitMap)));
rotBitMapPtr4 := BitMapPtr(NewClearPtr(SIZEOF(BitMap)));
END; { ELSE }
rotBitMap1 := rotBitMapPtr1^;
rotBitMap2 := rotBitMapPtr2^;
rotBitMap3 := rotBitMapPtr3^;
rotBitMap4 := rotBitMapPtr4^;
{ -------------------------------------- }
{ Draw off-screen ... }
{ -------------------------------------- }
ClipRect(kFullPICTrect);
{ Eliminate all stray matter. }
EraseRect(kFullPICTrect);
DrawPicture(monsterPicHdl, kFullPICTrect);
{ -------------------------------------------- }
{ Back to “Square 1” ... }
{ -------------------------------------------- }
ToOnScreen;
ClipRect(kWindPICTrect);
{ ---------------------------------------------------- }
{ Now, for the fun stuff ... }
{ ---------------------------------------------------- }
{ So funny colorization doesn’t happen. }
BackColor(whiteColor);
ForeColor(blackColor);
{ Black-and-white TOOOOO fast !! } toooooFast := aMac2 & (colorDepth
= 1);
err := RotateBits(offBitMap, rotBitMap1);
ErrorOut(1, offBitMap, err);
IF colorDepth > 1 THEN
BlockMove(Ptr(@rotBitMap1), Ptr(rotPixMap1^), SIZEOF(BitMap));
EraseRect(kWindPICTrect);
copyRect := rotBitMap1.bounds;
IF colorDepth = 1 THEN
CopyBits(rotBitMap1, onBWScreen^.portBits, copyRect, copyRect, srcCopy,
NIL)
ELSE
CopyBits(BitMapPtr(rotPixMap1^)^, BitMapPtr(onCScreen^.portPixMap^)^,
copyRect, copyRect, srcCopy, NIL);
IF toooooFast THEN
Delay(90, finalTicks);
{ +++++ }
err := RotateBits(rotBitMap1, rotBitMap2);
ErrorOut(2, rotBitMap1, err);
IF colorDepth > 1 THEN
BlockMove(Ptr(@rotBitMap2), Ptr(rotPixMap2^), SIZEOF(BitMap));
EraseRect(kWindPICTrect);
copyRect := rotBitMap2.bounds;
IF colorDepth = 1 THEN
CopyBits(rotBitMap2, onBWScreen^.portBits, copyRect, copyRect, srcCopy,
NIL)
ELSE
CopyBits(BitMapPtr(rotPixMap2^)^, BitMapPtr(onCScreen^.portPixMap^)^,
copyRect, copyRect, srcCopy, NIL);
IF toooooFast THEN
Delay(90, finalTicks);
{ +++++ }
err := RotateBits(rotBitMap2, rotBitMap3);
ErrorOut(3, rotBitMap2, err);
IF colorDepth > 1 THEN
BlockMove(Ptr(@rotBitMap3), Ptr(rotPixMap3^), SIZEOF(BitMap));
EraseRect(kWindPICTrect);
copyRect := rotBitMap3.bounds;
IF colorDepth = 1 THEN
CopyBits(rotBitMap3, onBWScreen^.portBits, copyRect, copyRect, srcCopy,
NIL)
ELSE
CopyBits(BitMapPtr(rotPixMap3^)^, BitMapPtr(onCScreen^.portPixMap^)^,
copyRect, copyRect, srcCopy, NIL);
IF toooooFast THEN
Delay(90, finalTicks);
{ +++++ }
err := RotateBits(rotBitMap3, rotBitMap4);
ErrorOut(4, rotBitMap3, err);
IF colorDepth > 1 THEN
BlockMove(Ptr(@rotBitMap4), Ptr(rotPixMap4^), SIZEOF(BitMap));
EraseRect(kWindPICTrect);
copyRect := rotBitMap4.bounds;
IF colorDepth = 1 THEN
CopyBits(rotBitMap4, onBWScreen^.portBits, copyRect, copyRect, srcCopy,
NIL)
ELSE
CopyBits(BitMapPtr(rotPixMap4^)^, BitMapPtr(onCScreen^.portPixMap^)^,
copyRect, copyRect, srcCopy, NIL);
myRotHdl4 := RecoverHandle(rotBitMap4.baseAddr);
{ The last straggler ... }
HUnlock(myRotHdl4);
DisposHandle(myRotHdl4);
{ --------------------------------------------------------------
}
{ Now, wasn’t that neat, folks !! }
{ --------------------------------------------------------------
}
100:
IF colorDepth > 1 THEN
BEGIN
DisposHandle(Handle(ourCTHandle));
DisposPixMap(rotPixMap1);
DisposPixMap(rotPixMap2);
DisposPixMap(rotPixMap3);
DisposPixMap(rotPixMap4);
END { IF colorDepth > 1 }
ELSE
BEGIN
DisposPtr(Ptr(rotBitMapPtr1));
DisposPtr(Ptr(rotBitMapPtr2));
DisposPtr(Ptr(rotBitMapPtr3));
DisposPtr(Ptr(rotBitMapPtr4));
END; { ELSE }
200:
DisposOffScreen;
SetPort(oldPort);
RemoveVBLTask;
END; { RotateItem }
DissolveItem:
BEGIN
IF NOT applWind THEN { Whoops !! }
EXIT(DoGraphics);
;
GetPort(oldPort);
{ ------------------- }
{ Here we go again !! }
{ ------------------- }
kFullPICTrect := scrolledFullPICTrect;
LocalGlobal(kFullPICTrect);
;
kWindPICTrect := windPICTrect;
CreateOffScreenError := CreateOffScreen(kWindPICTrect);
IF CreateOffScreenError <> noErr THEN
GOTO 300;
;
WITH screenBits.bounds DO
{ _GlobalToLocal }
OffsetRect(kFullPICTrect, left, top);
ClipRect(kWindPICTrect);
EraseRect(kWindPICTrect); { ... a clean slate. }
;
BackColor(whiteColor);
ForeColor(blackColor);
;
onScreenRgn := NewRgn;
RectRgn(onScreenRgn, screenBits.bounds);
CopyBits(oldPort^.portBits, offBitMapPtr^, windPICTrect, kWindPICTrect,
srcCopy, onScreenRgn);
DisposeRgn(onScreenRgn);
ToOnScreen;
ClipRect(kWindPICTrect);
EraseRect(kWindPICTrect);
WITH screenBits.bounds DO { Bomb-aroo if dissolving OFF screen !! }
BEGIN
IF kWindPICTrect.top < top THEN
kWindPICTrect.top := top;
IF kWindPICTrect.left < left THEN
kWindPICTrect.left := left;
IF kWindPICTrect.bottom > bottom THEN
kWindPICTrect.bottom := bottom;
IF kWindPICTrect.right > right THEN
kWindPICTrect.right := right;
END; { WITH }
;
ignore := SectRect(kWindPICTrect, kFullPICTrect, kFullPICTrect); {
Just the pic. }
DissBits(offBitMapPtr^, onScreenBitsPtr^, kFullPICTrect, kFullPICTrect);
300:
DisposOffScreen;
SetPort(oldPort);
END; { DissolveItem }
GdisabledItem:
BEGIN
END; { RdisabledItem }
QuitItem:
DoQuit;
OTHERWISE
BEGIN
END; { OTHERWISE }
END; { CASE...OF }
END; { DoGraphics }
{ --------------------------------------------------------------------------
}
{ HandleMenu is the top level dispatch }
{ routine for menu commands. The item }
{ selected is passed to the appropriate }
{ menu handler. }
{ --------------------------------------------------------------------------
}
PROCEDURE HandleMenu;
VAR
menuCode: LONGINT;
charCode: INTEGER;
BEGIN
IF Event.what = MouseDown THEN
menuCode := MenuSelect(Event.where)
ELSE
BEGIN
charCode := BitAnd(Event.message, CharCodeMask);
menuCode := MenuKey(CHR(charCode));
END; { ELSE }
CASE HiWord(menuCode) OF
AppleMenuID:
DoApple(LoWord(menuCode));
EditMenuID:
DoEdit(LoWord(menuCode));
GraphicsMenuID:
DoGraphics(LoWord(menuCode));
OTHERWISE
IF Event.what = KeyDown THEN
SysBeep(10);
END; { CASE }
HiLiteMenu(0)
END; { HandleMenu }
PROCEDURE SetUpMenus;
BEGIN
AppleMenu := GetMenu(AppleMenuID);
InsertMenu(AppleMenu, 0);
AddResMenu(AppleMenu, ‘DRVR’); { + DAs }
;
EditMenu := GetMenu(EditMenuID);
InsertMenu(EditMenu, 0);
DisableItem(EditMenu, 0); { The WHOLE thing !! }
currEdit := FALSE;
;
GraphicsMenu := GetMenu(GraphicsMenuID);
InsertMenu(GraphicsMenu, 0);
currGraphics := TRUE;
DrawMenuBar;
END; { SetUpMenus }
{ ----------------------------------------------------------------------------------------------------------------
}
{ Quantify two rectangles for our PICTure. The 1st is the }
{ window’s portRect, less any Scroll Bar area. The 2nd is }
{ for the full PICTure centered in the window. If the }
{ PICTure is too large to fit, then he topLeft of this }
{ “fullPICTrect” is shoved toward the window's topLeft. }
{ ----------------------------------------------------------------------------------------------------------------
}
PROCEDURE GetPicRects (window: WindowPtr);
LABEL
100;
VAR
myWindowPic: picHandle;
tempX, tempY: INTEGER;
BEGIN
windPICTrect := window^.portRect;
;
WITH windPICTrect DO {Clip to this before drawing PICT.}
BEGIN
IF (ScrollVert(window) <> NIL) | (ScrollHoriz(window) <> NIL) THEN
BEGIN
right := (right + 1) - scrollWidth;
bottom := (bottom + 1) - scrollHeight;
END; { IF }
END; { WITH }
myWindowPic := picHandle(GetWRefCon(window));
IF myWindowPic = NILTHEN
BEGIN
fullPICTrect := windPICTrect;
GOTO 100;
END; { IF myWindowPic = NIL }
WITH windPICTrect DO
BEGIN
tempX := right - left;
tempY := bottom - top;
END; { WITH }
WITH myWindowPic^^.picFrame DO
BEGIN
tempX := tempX - (right - left); {window - PICT width}
tempY := tempY - (bottom - top); {window - PICT height}
END; { WITH }
IF tempX < 0 THEN
tempX := 0;
IF tempY < 0 THEN
tempY := 0;
WITH fullPICTrect DO {_DrawPicture within this for 1:1}
BEGIN
top := windPICTrect.top + tempY DIV 2;
bottom := top + (myWindowPic^^.picFrame.bottom - myWindowPic^^.picFrame.top);
left := windPICTrect.left + tempX DIV 2;
right := left + (myWindowPic^^.picFrame.right - myWindowPic^^.picFrame.left);
END; { WITH }
100:
scrolledFullPICTrect := fullPICTrect;
{ I lied ... a 3rd rect for scrolling. }
END; { GetPicRects }
PROCEDURE RememberPicRects;
BEGIN
saveWindPICTrect := windPICTrect;
saveFullPICTrect := fullPICTrect;
saveScrolledFullPICTrect := scrolledFullPICTrect;
END; { RememberPicRects }
{ ---------- }
PROCEDURE ResetPicRects;
BEGIN
windPICTrect := saveWindPICTrect;
fullPICTrect := saveFullPICTrect;
scrolledFullPICTrect := saveScrolledFullPICTrect;
END; { ResetPicRects }
{ ---------- }
PROCEDURE ResetCtls (windPtr: WindowPtr);
VAR
oldClip: RgnHandle;
HCtlValue, VCtlValue: INTEGER;
PROCEDURE SetMyCtlValue (ctlHndl: ControlHandle; value: INTEGER);
VAR
temp: Rect;
BEGIN
IF ctlHndl = NIL THEN
EXIT(SetMyCtlValue);
temp := ctlHndl^^.contrlRect;
InsetRect(temp, 1, 1);
ClipRect(temp);
SetCtlValue(ctlHndl, value);
END; { SetMyCtlValue }
BEGIN { ResetCtls }
oldClip := NewRgn;
GetClip(oldClip);
HCtlValue := -(scrolledFullPICTrect.left - fullPICTrect.left) DIV 12;
VCtlValue := -(scrolledFullPICTrect.top - fullPICTrect.top) DIV 12;
SetMyCtlValue(ScrollHoriz(windPtr), HCtlValue);
SetMyCtlValue(ScrollVert(windPtr), VCtlValue);
SetClip(oldClip);
DisposeRgn(oldClip);
END; { ResetCtls }
{ --------------------------------------------------------------------------------------------------------
}
{ Make a separate PROC so we can zoom independently of }
{ _TrackBox, for example, in response to a Menu }
{ selection or a keypress: }
{ --------------------------------------------------------------------------------------------------------
}
PROCEDURE doZoom (window: WindowPtr; partCode: INTEGER);
VAR
oldPort: GrafPtr;
tempRect, srcZoomRect, dstZoomRect: Rect;
PROCEDURE AdjustWindRect (window: WindowPtr; VAR r: Rect);
CONST
frame = 1;
shadow = 1;
title = 18;
VAR
windDef: INTEGER;
BEGIN { AdjustWindRect }
windDef := GetWVariant(window);
InsetRect(r, -frame, -frame);
{ ---- }
IF (windDef = 0) OR (windDef > 3) THEN
r.top := r.top - title; { Window has a title bar. }
{ ---- }
IF (windDef = documentProc) OR (windDef = altDBoxProc) OR (windDef =
noGrowDocProc) OR (windDef = zoomDocProc) THEN
WITH r DO { Window has a shadow frame. }
BEGIN
bottom := bottom + shadow;
right := right + shadow;
END; { WITH r }
END; { AdjustWindRect }
BEGIN { doZoom }
IF NOT applWind THEN
EXIT(doZoom);
GetPort(oldPort);
SetPort(window);
CASE partCode OF
inZoomOut:
BEGIN
IF NOT WindowPeek(window)^.spareFlag THEN
BEGIN { no Zoom box. }
tempRect := screen;
InsetRect(tempRect, 2, 2); { Max zoom rect. }
CalcWindowFrame(window, srcZoomRect);
LocalGlobal(srcZoomRect);
zoomBackIn := srcZoomRect; { Save for ... }
dstZoomRect := tempRect;
END
ELSE { has a Zoom box. }
BEGIN
stateHandle := WStateHdl(WindowPeek(window)^.dataHandle);
WITH stateHandle^^ DO
BEGIN
srcZoomRect := userState;
dstZoomRect := stdState;
{ ONLY portRects ... so we need to adjust the sizes: }
AdjustWindRect(window, srcZoomRect);
AdjustWindRect(window, dstZoomRect);
END; { WITH stateHandle^^ }
END; { ELSE has a Zoom box }
{ ---------- }
ZoomRect(srcZoomRect, dstZoomRect);
PlaySound('ZoomOut');
ShowHide(window, FALSE); { NOW, wave the magic wand.}
InvalidScroll(window);
RememberPicRects;
ZoomWindow(window, partCode, TRUE);
GetPicRects(window); { ... for NEW portRect. }
ScrollResize(window);
InvalidScroll(window);
ShowHide(window, TRUE);
nextState := inZoomIn;
END; { inZoomOut }
inZoomIn:
BEGIN
IF NOT WindowPeek(window)^.spareFlag THEN
BEGIN
tempRect := screen;
InsetRect(tempRect, 2, 2); { Max zoom rect. }
srcZoomRect := tempRect;
dstZoomRect := zoomBackIn;
END { no Zoom box. }
ELSE
BEGIN
stateHandle := WStateHdl(WindowPeek(window)^.dataHandle);
WITH stateHandle^^ DO
BEGIN
srcZoomRect := stdState;
dstZoomRect := userState;
AdjustWindRect(window, srcZoomRect);
AdjustWindRect(window, dstZoomRect);
END; { WITH stateHandle^^ }
END; { ELSE has a Zoom box }
{ ---------- }
ZoomRect(srcZoomRect, dstZoomRect);
PlaySound('ZoomIn');
ShowHide(window, FALSE); { Magic wand time !! }
InvalidScroll(window);
ZoomWindow(window, partCode, TRUE);
ScrollResize(window);
ResetPicRects;
SetMaxCtls(window);{ For IMMEDIATE seeing of }
ResetCtls(window); {former control values -- SIGH!!}
InvalidScroll(window);
ShowHide(window, TRUE);
nextState := inZoomOut;
END; { inZoomIn }
OTHERWISE { Nada !! }
BEGIN
END;
END; { CASE }
SetPort(oldPort);
END; { doZoom }
PROCEDURE HandleMouse;
VAR
tempRect: rect;
newSize: LONGINT;
windWidth, windHt: INTEGER;
mouseLoc: Point;
theControl: ControlHandle;
partControl: INTEGER;
BEGIN
CASE windowLoc OF
inDesk:
BEGIN
END; { inDesk }
inMenuBar:
HandleMenu;
inSysWindow:
SystemClick(Event, TheWindow); { A DA window. }
inContent:
BEGIN
IF TheWindow <> FrontWindow THEN
BEGIN
SelectWindow(TheWindow);
{ Generates an Activate Event. }
EXIT(HandleMouse);
END; { IF TheWindow <> FrontWindow }
mouseLoc := Event.where;
GlobalToLocal(mouseLoc);
partControl := FindControl(mouseLoc, TheWindow, theControl);
IF partControl <> 0 THEN
Scroll(theControl, partControl, mouseLoc)
ELSE IF DoubleClick THEN
doGraphics(QuitItem);
END; { inContent }
inDrag:
BEGIN
IF DoubleClick & (nextState = inZoomOut) THEN
BEGIN
doZoom(TheWindow, inZoomOut);
EXIT(HandleMouse);
END; { IF ... }
tempRect := screen;
WITH TheWindow^.portRect DO
BEGIN
windWidth := right - left;
windHt := bottom - top;
END; { WITH TheWindow^.portRect }
WITH tempRect DO
BEGIN
left := left + windWidth DIV 10;
right := right - windWidth DIV 10;
IF (windHt DIV 10 > mBarHt) THEN
BEGIN
top := top + windHt DIV 10;
bottom := bottom - windHt DIV 10;
END
ELSE
BEGIN
top := top + mBarHt;
bottom := bottom - mBarHt;
END; { ELSE }
END; { WITH tempRect }
{ _DragWindow forces the Mouse to stay inside of tempRect. }
DragWindow(TheWindow, Event.where, tempRect);
{ This craziness ????? is required because I zoom the }
{ window in response to a keypress. I call _SizeWindow }
{ with NO effective change just to re-quantify the }
{ userState in the WStateRec(ord). }
WITH TheWindow^.portRect DO
SizeWindow(TheWindow, right - left, bottom - top, FALSE); { NO update
!! }
GetMouse(mouseLoc);
LocalToGlobal(mouseLoc);
IF PtInRect(mouseLoc, tempRect) THEN
{ It’s a drag, allright !! }
nextState := inZoomOut;
{ ELSE NO change !! }
END; { inDrag }
inGrow:
BEGIN
WITH screen DO
BEGIN
SetRect(tempRect, left, top, right - left, bottom - top);
InsetRect(tempRect, mBarHt, mBarHt);
END; { WITH screen }
newSize := GrowWindow(TheWindow, Event.where, tempRect);
IF newSize = 0 THEN
EXIT(HandleMouse); { NO change. }
EraseRect(TheWindow^.portRect); { The OLD portRect.}
{ InvalRect(TheWindow^.portRect); -- passed TRUE to _SizeWindow.
}
SizeWindow(TheWindow, LoWord(newSize), HiWord(newSize), TRUE);
GetPicRects(TheWindow);
{_SizeWindow’s NEW portRect affects our picFrame.}
ScrollResize(TheWindow);
SetCtlsToMin(TheWindow);
InvalRect(TheWindow^.portRect);
nextState := inZoomOut;
END; { inGrow }
inGoAway:
BEGIN
IF TrackGoAway(TheWindow, Event.where) THEN
DoQuit;
END; { inGoAway }
inZoomOut, inZoomIn:
IF TrackBox(TheWindow, Event.where, windowLoc) THEN
doZoom(TheWindow, windowLoc);
END; { CASE }
END; { HandleMouse }
PROCEDURE HandleKey;
VAR
keyASCII: INTEGER;
key: char;
BEGIN
IF NOT applWind THEN
EXIT(HandleKey);
IF BitAnd(Event.modifiers, $0F00) = cmdKey THEN
{ ONLY the Command Key }
HandleMenu
ELSE
BEGIN
keyASCII := BitAnd(Event.message, CharCodeMask);
key := CHR(keyASCII);
IF (key = ‘z’) | (key = ‘Z’) THEN
doZoom(FrontWindow, nextState)
ELSE
SysBeep(10);
END; { ELSE no Command Key }
END; { HandleKey }
{ ===================================================== }
{ HandleUpdate re-draws any controls, text, or PICTs as }
{ well as the Grow Icon. }
{ ===================================================== }
PROCEDURE HandleUpdate;
VAR
oldPort: GrafPtr;
window: WindowPtr;
HcntlHdl, VcntlHdl: ControlHandle;
BEGIN
GetPort(oldPort);
window := WindowPtr(Event.message);
SetPort(window);
HcntlHdl := ScrollHoriz(window);
VcntlHdl := ScrollVert(window);
BeginUpDate(window);
ClipRect(window^.portRect);
EraseRect(window^.portRect);
DrawControls(window);
IF (HcntlHdl <> NIL) | (VcntlHdl <> NIL) THEN
DrawGrowIcon(window);
{ Clip to the window LESS Scroll Bar(s). }
ClipRect(windPICTrect);
DrawPicture(monsterPicHdl, scrolledFullPICTrect);
{ ... but still draw 1:1 }
ClipRect(window^.portRect);
{ Reset to see Scroll Bars move and be highlighted -- Sigh !! }
EndUpdate(window);
SetPort(oldPort)
END; { HandleUpdate }
{ ----------------------------------------------------------------------------------------------------
}
{ Need to separate them because we’re trying to make }
{ this blasted thing MultiFinder-compatible: }
{ ----------------------------------------------------------------------------------------------------
}
PROCEDURE DoActivate (window: WindowPtr);
VAR
HcntlHdl, VcntlHdl: ControlHandle;
BEGIN
SetPort(window);
windDef := GetWVariant(window); {In DisplayWindow, also.}
HcntlHdl := ScrollHoriz(window);
IF HcntlHdl <> NIL THEN
HiliteControl(HcntlHdl, 0);
VcntlHdl := ScrollVert(window);
IF VcntlHdl <> NIL THEN
HiliteControl(VcntlHdl, 0);
IF (HcntlHdl <> NIL) | (VcntlHdl <> NIL) THEN
DrawGrowIcon(window);
IF aMac2 & (colorHandCrsr = NIL) THEN
{ Color me paranoid !! }
colorHandCrsr := GetCCursor(HANDcrsrID);
END; { DoActivate }
PROCEDURE DoDeactivate (window: WindowPtr);
VAR
HcntlHdl, VcntlHdl: ControlHandle;
BEGIN
HcntlHdl := ScrollHoriz(window);
IF HcntlHdl <> NIL THEN
HiliteControl(HcntlHdl, 255);
VcntlHdl := ScrollVert(window);
IF VcntlHdl <> NIL THEN
HiliteControl(VcntlHdl, 255);
IF (HcntlHdl <> NIL) | (VcntlHdl <> NIL) THEN
DrawGrowIcon(window);
IF aMac2 & (colorHandCrsr <> NIL) THEN
BEGIN
DisposCCursor(colorHandCrsr);
colorHandCrsr := NIL; { Mark as gone !! }
stillColorCrsr := FALSE;
END; { IF aMac2 & () }
END; { DoDeactivate }
PROCEDURE HandleActivate;
VAR
window: WindowPtr;
BEGIN
window := WindowPtr(Event.message);
IF ODD(Event.modifiers) THEN
DoActivate(window)
ELSE
DoDeactivate(window);
END; { HandleActivate }
PROCEDURE DoPeriodic;
VAR
ignoreError: OSErr;
BEGIN
IF NOT WNE THEN
SystemTask;
colorDepth := TestForColor;
PeriodicMenus; { Feeds HandleCursor. }
HandleCursor;
IF Sleep = 1 THEN
Sleep := GetCaretTime; { Reset after special effects. }
IF applWind & InForeGround THEN
BEGIN
SetMaxCtls(FrontWindow);
IF justOpened THEN
BEGIN
justOpened := FALSE;{ Just once, Sam !! }
SpiffyDissolve;
{ Retrieve Scroll Bars AFTER the }
{ dissolve so they don’t get in the way:}
horizControl := GetNewControl(horizScrollID, TheWindow);
vertControl := GetNewControl(vertScrollID, TheWindow);
ScrollResize(TheWindow);
GetPicRects(TheWindow);
InvalRect(TheWindow^.portRect); {NOW do Update !!}
END; { IF justOpened }
IF justBragging THEN
BEGIN
justBragging := FALSE;
SpiffyRoll;
END; { IF justBragging }
END; { IF applWind & InForeGround }
END; { DoPeriodic }
PROCEDURE MainEventLoop;
VAR
ignoreResult: BOOLEAN;
BEGIN
REPEAT
IF WNE THEN
ignoreResult := WaitNextEvent(everyEvent, Event, Sleep, NIL)
ELSE
ignoreResult := GetNextEvent(everyEvent, Event);
CASE Event.what OF
NullEvent:
DoPeriodic;
MouseDown:
BEGIN
{ Fills in 'TheWindow'. }
windowLoc := FindWindow(Event.where, TheWindow);
HandleMouse;
END;
MouseUp:
BEGIN
END;
KeyDown, AutoKey:
HandleKey;
KeyUp:
BEGIN
END;
UpdateEvt:
HandleUpdate;
DiskEvt:
BEGIN
MouseDown:
BEGIN
windowLoc := FindWindow(Event.where, TheWindow);
{ Fills in ‘TheWindow’. }
HandleMouse;
END;
MouseUp:
BEGIN
END;
KeyDown, AutoKey:
HandleKey;
KeyUp:
BEGIN
END;
UpdateEvt:
HandleUpdate;
DiskEvt:
BEGIN
END;
ActivateEvt:
HandleActivate;
NetworkEvt, DriverEvt:
BEGIN
END;
App1Evt, App2Evt, App3Evt:
BEGIN
END;
OSEvent: { MultiFinder Event = app4Evt }
BEGIN
CASE BSR(Event.message, 24) OF { High byte }
mouseMovedMessage:
HandleCursor;
suspendResumeMessage:
BEGIN
IF BAND(Event.message, resumeMask) <> 0 THEN
BEGIN
InForeGround := TRUE;
DoActivate(FrontWindow)
END { Resume }
ELSE { Suspend }
BEGIN
InForeGround := FALSE;
DoDeactivate(FrontWindow);
END; { ELSE }
END; { suspendResumeMessage }
OTHERWISE
END; { CASE BSR(Event.message, 24) OF }
END; { MultiFinder Event }
OTHERWISE
END; { CASE Event.what OF }
UNTIL Done;
END; { MainEventLoop }
BEGIN { Program }
InitManagers; { The usual stuff ... }
PlaySound(‘Oops’);
Done := FALSE;
aMac2 := TestForMac2;
colorHandCrsr := NIL;
stillColorCrsr := FALSE;
InForeGround := TRUE; { Assume UniFinder. }
WNE := WNEisImplemented;
Sleep := GetCaretTime;
acurHdl := NIL; { See “RemoveVBLTask”. }
nextState := inZoomOut;
SetUpMenus;
screen := RgnHandlePtr(GrayRgn)^^^.rgnBBox;
ROM := wordPtr(ROM85Loc);
IF ROM^ > 0 THEN
mBarHt := wordPtr(mBarHeightLoc)^
ELSE
mBarHt := 20;
monsterPicHdl := GetPicture(monsterID);
IF Handle(monsterPicHdl) = NIL THEN
GOTO 100;
HLock(Handle(monsterPicHdl));
IF aMac2 THEN
TheWindow := GetNewCWindow(mainWindowID, NIL, WindowPtr(-1))
ELSE
TheWindow := GetNewWindow(mainWindowID, NIL, WindowPtr(-1));
IF TheWindow = NIL THEN
BEGIN
HUnlock(Handle(monsterPicHdl));
ReleaseResource(Handle(monsterPicHdl));
GOTO 100;
END; { IF TheWindow = NIL }
SetPort(TheWindow);
{ Retrieve Scroll Bars AFTER the dissolve }
{ so they don’t get drawn pre-maturely. }
SetWindowPalette(TheWindow, mainWindowID);
{ Palette ID = Window ID. }
SetWRefCon(TheWindow, LONGINT(monsterPicHdl));
{ Save for scrolling later. }
DisplayWindow(TheWindow);
ValidRect(TheWindow^.portRect);
{ Postpone Update until AFTER the dissolve. }
justOpened := TRUE; { See “DoPeriodic” ... }
justBragging := FALSE;
MainEventLoop;
PlaySound(‘Moof’);
100:
ExitToShell;
END. { Program }
