TweetFollow Us on Twitter

Help Function
Volume Number:3
Issue Number:4
Column Tag:C Workshop

List Manager Inspires Help Function Solution

By William Rausch, Battele Pacific Northwest Labs, Richland, WA

I’ve always liked the method of presenting “on-line help” information used by the Excel™ program. When I received the LightSpeed C™ V2.01 upgrade for the 128K ROMS, I created a similar kind of help function while learning how to use some of the List Manager routines. This article presents my “help” function, and explains how to implement it in C, using the List Manager.

The help dialog box is shown in Figure 1. It contains an OK button and two boxes, one for the list of topics and one to show the help information for the currently selected topic. The help function builds the list of topics dynamically, using an STR# resource number passed to it by the calling routine. Each string in the STR# resouce contains a topic and a reference number. The reference number is the ID of a HELP resource. Whenever the user selects a topic, the ASCII text from the corresponding HELP resource is displayed in a scrollable TextEdit record.

The code shown in Listing 1 consists of a very simple main() and an equally simple do_about() function, and the routines that make up the help function: do_help(), read_help(), show_help(), help_filter(), and help_action().

do_help() is called to start things off. It takes a single parameter, the ID of the STR# resource that contains the help topics to be displayed. By using a parameter in this way, it should be easy to introduce some context sensitivity into the help that gets displayed. do_help() reads in the STR# resource and gets the number of topics in the list. It reads the dialog resource for the help dialog window. The help_list user item is then read in to get its dimensions. This information (dimensions and number of topics) is used to create the empty list structure with a call to the List Manager routine LNew(). Note that the List Manager requires that the dimensions include room for the scroll bar (if one is present).

The read_help() function gets the individual strings from the STR# resource and parses each one for a topic and an ID number. A backslash is used as the delimeter marking the end of the topic and the start of the ID number. As each topic is read in, it is added to the topic list by calling the List Manager routine LSetCell(). Its corresponding HELP ID number is stored in the array help_id[]. Finally, the List Manager routine LSetSelect() is called to select the first cell as the starting point and LDoDraw() is called to make the list visible.

The show_help() function sets up the help text box by getting its dimensions from the second user item in the dialog resource. (As with the topic list box, the user item is large enough to include the scroll bar as well.) The font and size are then specified. After some experimenting, I settled on 10-pt Geneva font. There is no reason you couldn’t select some other font for your application though.

Once the help box is prepared, we load it with the HELP resource that corresponds to the first topic in the list (since that topic is selected when the help dialog first appears on the screen). This is done by merely reading in the HELP resource designated by help_id[0]. A HELP resource is merely composed of ASCII text, and it is copied directly into the TextEdit record using the TEInsert() routine. Finally, the need for a vertical scroll bar is checked, and if it is, then it is activated and the proper maximum value is set using SetCtlMax(). Then, we repeatedly call ModalDialog() until the user clicks OK (or hits Return). At that time we dispose of the various data structures and return.

Fig. 1 Our help function demo in action!

The interaction with the user is controlled by the help_filter() function passed to ModalDialog() as a filterProc. (Note that help_filter() is declared as ’Boolean Pascal‘. This is because it will be called by the ROM routines and needs to conform to the expected way of passing parameters.) Since it gets to examine every single event that occurs while the modal dialog is running, it is very easy to respond to user actions. Basically, the routine is nothing but a switch statement on the type of event. On an updateEvt it redraws the user items (our two boxes). On a keyDown it checks to see if it was a Return and, if so, tells the calling routine that the OK button was selected. On a mouseDown, it may perform a number of activities as we will see. For any other event, it does nothing.

To handle a mouseDown event, the function first checks to see if the mouse was clicked in a scroll bar. If it was clicked in our help box scroll bar, TrackControl() is called. TrackControl() is called with or without an actionProc depending on whether the mouseDown occured in the “thumb” or elsewhere in the scroll bar. If the mouseDown occured in the thumb, the help text is scrolled after the call to TrackControl() returns. If the mouseDown occured in some other part of the scroll bar (up or down arrow, up or down page), the function help_action() is passed as an actionProc. (As with the filterProc previously discussed, it is declared as a ‘Pascal’ function, but of type void since it doesn’t return a value of any type.) help_action() merely checks the partcode it is passed, gets the current value of the scroll bar, and scrolls the text up or down as neccessary to accomodate the user’s actions. The up and down arrows cause the text to scroll one line at a time; the up and down pages cause the text to scroll five lines at a time.

Fig. 2 STR# Resources for topic headlines

If the click occurred in the List Manager’s scroll bar, call the routine LClick() to handle it. If the click was not in a scroll bar, check to see if it was inside the topic box. (A Rect is the first item of the List Manager’s data structure; hence the “*h.help_list” used for the PtInRect() call.) If so, call the LClick() routine and see if the user has selected a new topic. Do this by comparing the cell number returned from a call to LGetSelect() with the one saved in h.last_one. If the selected topic has changed, delete the help text currently stored in the TErecord and replace it with the HELP resource corresponding to the new topic. Then, update h.last_one with the new cell number.

Any other type of event is ignored by the filterProc and is left to the ModalDialog() function to handle. When the user finally clicks the OK button (or hits Return), the while() loop surrrounding the call to ModalDialog() (in show_help()) completes and we clean up after ourselves by disposing of the various data structures we created.

The help dialog resource just contains three items:

1) an OK button

2) a user item for the help text

3) a user item for the topic list

This resource is easy to create using ResEdit. It doesn’t matter what shape or size the user items are or where in the dialog they are located. Just make sure that they include enough space for the scroll bars to fit alongside your text.

The HELP resources are just ASCII text. I created mine using ResEdit 1.1-D. It would be easy to write a simple program that would take text from an editor file and convert it into a HELP resource. No special formatting is necessary (however, be sure to use just normal printing ASCII characters that TextEdit knows how to handle). The topic lists are just as simple. Create an STR# resource, where each string contains the topic, a backslash, and the ID number of a HELP resource (see Figure 2). [To give you the big picture of how this is done, the resource file was "de-compiled" with DeRez and "re-compiled" with Rez. The resource listing at the end of the article is the Rez input file, with the hex data for the help strings removed to save space. Note that the STR# resources in Rez format appear to have an extra backslash, but this is apparently the Rez formatting character as figure 2 clearly shows a single backslash seperating our topic from the ID number of the help resource. -Ed]

To conclude, I think that this on-line help function is an easily implemented, yet powerful, method of presenting information to a user. The major advantage when compared to Excel and other such programs is that it allows you to more easily peruse information about multiple topics. The ability to easily present context sensitive help is another bonus.

Fig. 3 LS C Link Window

Listing 1: C source code for the help demo program
/************************************************
 * help.c - demo program shows a new way to
 *          present on-line help
 *
 * Bill Rausch, Jan 1987
 * Uses LightSpeed C™ (Think Technologies, Inc.)
 ***********************************************/

#include <EventMgr.h>
#include <MenuMgr.h>
#include <WindowMgr.h>
#include <ToolboxUtil.h>
#include <DialogMgr.h>
#include <FontMgr.h>
#include <TextEdit.h>
#include <ListMgr.h>
#include <strings.h>
#include <pascal.h>

#define NULL 0L
#define ACTIVATE 0
#define INACTIVATE 255

#define FILEID 256
#define ABOUT 1 
#define HELP 2
#define QUIT 3

#define HELP_DLG 256
#define HELP_OK 1
#define HELP_BOX 2
#define HELP_LIST 3

#define HELP_STR 256 /* STR# containing topics */
#define MAX_HELPS 100 /* application dependent */

struct {
  Rect text_box;    /* user item dimensions */
  Rect topic_box;   /* user item dimensions */
  TEHandle text;
  ListHandle topics;
  Rect d_rect;      /* TextEdit's dest rect */
  Rect v_rect;      /* TextEdit's view rect */
  int offset;       /* d_rect vertical shift */
  int lines_vis;    /* number of lines visible */
  ControlHandle text_scroll;
  int max_text;     /* max value of scroller */
  int help_id[MAX_HELPS]; /* topics’ HELP IDs */
  int num_topics;   /* how many topics? */
  int last_one;     /* last cell clicked in */
  } h;

pascal Boolean help_filter();
Boolean show_help();
pascal void help_action();

/************************************************
 * Trivial main(), just enough to use a single 
 * menu with only three items: About..., Help...,
 * and Quit. No DAs, no windows, no command key
 * equivalents or other key strokes. */
main()
  {
  EventRecord the_event;
  WindowPtr which_window;
  int menu_id, item_number;
  long menu_code;
  int window_code;
  MenuHandle filemenu;
  
  FlushEvents(everyEvent, 0);
  InitGraf(&thePort);
  InitFonts();
  InitWindows();
  InitMenus();
  TEInit();
  InitDialogs(NULL);
  
  filemenu = GetMenu(FILEID);
  InsertMenu(filemenu, 0);
  DrawMenuBar();
  InitCursor();
  
  for (;;)  /* event loop */
    {
    if (GetNextEvent(everyEvent, &the_event)) 
      {
      if (the_event.what == mouseDown)
        {
        window_code=FindWindow(the_event.where,&which_window);
        if (window_code == inMenuBar)
          {
          menu_code = MenuSelect(the_event.where);
          menu_id = HiWord(menu_code);
          item_number = LoWord(menu_code);
          if (menu_id == FILEID)
            {
            if (item_number == ABOUT)
              do_about(
          "Help demo - Bill Rausch - Jan. 1987",
          "LightSpeed C™ by Think Technologies");
            else if (item_number == HELP)
              do_help(HELP_STR);
            else if (item_number == QUIT)
              ExitToShell();
            else
              SysBeep(1);
            }
          HiliteMenu(0);
          DrawMenuBar();
          }
        else
          SysBeep(1);
        }
      else
        SysBeep(1);
      }
    }
  }

/***********************************************/
/* creates alert-like box, waits for mouseDown */
do_about(text1, text2)    
char *text1, *text2;
  {
  long dummy;
  Rect box;
  Rect line;
  GrafPtr old_port;
  WindowPtr window;
  EventRecord an_event;
  
  SetRect(&line, 6, 5, 345, 25);
  SetRect(&box, 75, 125, 425, 180);
  window = NewWindow(NULL, &box, "", TRUE,
                     dBoxProc, -1L, TRUE, NULL);
  GetPort(&old_port);
  SetPort(window);
  
  TextFont(systemFont);
  TextBox(text1, (long)strlen(text1), &line,
          teJustCenter);
  OffsetRect(&line, 0, 28);
  TextBox(text2, (long)strlen(text2), &line,
          teJustCenter);
  
  do { 
    GetNextEvent(everyEvent, &an_event);
    } while (an_event.what != mouseDown);
    
  DisposeWindow(window);
  SetPort(old_port);
  }

/************************************************
 * Help routine that makes use of the List 
 * Manager to present user with a list of topics
 * and help text about each one. The topics are
 * stored as a STR# resource and the help texts
 * are stored as HELP resources. Each topic 
 * string contains the number of its associated
 * HELP resource.
 * Note: requires Geneva 10 font to be present */
do_help(str_id)
int str_id;
  {
  DialogPtr the_dialog;
  Handle scr_handle;      /* scratch variable */
  int scratch;            /* scratch variable */
  Str255 scr_str;         /* scratch variable */
  Rect hdata_rect;  /* for list manager setup */
  Point cell_size;  /* for list manager setup */
  Handle topics;    /* for list manager setup */
  int *n_t_ptr;
  GrafPtr old_port;
  
  /* Read STR#, get number topics */
  topics = GetResource('STR#', str_id);
  h.num_topics = *(int *)(*topics);
  
  /* Read dialog box resource */
  the_dialog = GetNewDialog(HELP_DLG, NULL, -1L);
  GetPort(&old_port);    /* save where we were */
  SetPort(the_dialog);
  
  /* get user item for topic list */
  GetDItem(the_dialog, HELP_LIST, &scratch,
           &scr_handle, &h.topic_box);
  InsetRect(&h.topic_box, 1, 1);
  /* leave room for vertical scroll bar */
  h.topic_box.right -= 15;
  SetRect(&hdata_rect, 0, 0, 1, h.num_topics);
  SetPt(&cell_size, h.topic_box.right - 
        h.topic_box.left, 16);
  
  h.topics = LNew(&h.topic_box, &hdata_rect, 
                  cell_size, 0, the_dialog,
                  FALSE, FALSE, FALSE, TRUE);
  (*h.topics)->selFlags = lOnlyOne;
  /* restore rect for framing */
  InsetRect(&h.topic_box, -1, -1);
  read_help(h.topics,h.num_topics,h.help_id,str_id);
                       
  if (!show_help(the_dialog, h.topics, 
                 h.help_id))
    do_about("show_help()",
             "returned an error.");
    
  SetPort(old_port);    /* put us back */
  }

/************************************************
 * Read the topics from the STR# resource. Add
 * them to the List as they are read. Also, save
 * the IDs in an array for use later in finding
 * the proper HELP resource to display for each
 * topic. */
read_help(topics, num_topics, help_id, 
                  str_id)
ListHandle topics;
int num_topics;
int help_id[];
int str_id;
  {
  int i;
  Str255 a_topic;
  Point the_cell;
  char *id_number;
  Str255 strvar;
  
  for (i=0; i<num_topics; i++)
    {
    GetIndString(a_topic, str_id, i+1);
    PtoCstr(a_topic);
    id_number = strchr(a_topic, (char)'\\');
    
    /* terminate topic and point to number */
    *id_number++ = '\0';
    help_id[i] = atoi(id_number);
    
    SetPt(&the_cell, 0, i);
    LSetCell(a_topic, strlen(a_topic), the_cell,
             topics);
    }
               
  SetPt(&the_cell, 0, 0);
  LSetSelect((Boolean)TRUE, the_cell, topics);
  LDoDraw((Boolean)TRUE, topics);
  }

/************************************************
 * Set up the help text for the first topic in 
 * the list. Call ModalDialog (with a filterProc
 * to do all the work). Loop until user clicks
 * OK. */
Boolean show_help(the_dialog, topics, help_id)
DialogPtr the_dialog;
ListHandle topics;
int help_id[];
  {
  GrafPtr old_port;
  int item_hit;     /* returned by ModalDialog */
  int scr_int;       /* scratch variable */
  Handle scr_handle; /* scratch variable */
  Boolean done = FALSE;
  int i, buf_size;
  Rect scroll_rect;
  Handle the_help;
  
  /* get user item for help text */
  GetDItem(the_dialog, HELP_BOX, &scr_int, 
           &scr_handle, &h.text_box);
  /* leave room for scroll bar */
  h.text_box.right -= 16;
  scroll_rect.right = h.text_box.right + 15;
  scroll_rect.left = h.text_box.right - 1;
  scroll_rect.top = h.text_box.top;
  scroll_rect.bottom = h.text_box.bottom;
  h.text_scroll = NewControl(the_dialog, 
                          &scroll_rect, "", TRUE, 
                          0, 0, 0, 16, NULL);
  HiliteControl(h.text_scroll, INACTIVATE);
  
  /* Set up TextEdit record for the help text */
  h.d_rect.top = h.text_box.top + 1; 
  h.d_rect.left = h.text_box.left + 1;
  h.d_rect.right = h.text_box.right - 1;
  h.d_rect.bottom = 20000;    /* infinity */
  h.v_rect = h.text_box;
  InsetRect(&h.v_rect, 1, 1);
  h.text = TENew(&h.d_rect, &h.v_rect);
  (*h.text)->txFont = geneva;
  (*h.text)->txSize = 10;
  
  h.last_one = 0;    /* 1st topic selected */
  h.offset = 0;      /* at top left corner now */
  h.lines_vis = (h.v_rect.bottom - h.v_rect.top) 
                / (*h.text)->lineHeight;
  
  /* put 1st topic’s text into help box */
  the_help = GetResource('HELP', help_id[0]);
  buf_size = SizeResource(the_help);
  TEDeactivate(h.text);
  TESetSelect(32767L, 32767L, h.text);
  HLock(the_help);
  TEInsert(*the_help, (long)buf_size, h.text);
  HUnlock(the_help);
  
  /* vertical scroll bar necessary? */
  if ((*h.text)->nLines > h.lines_vis)
    {
    HiliteControl(h.text_scroll, ACTIVATE);
    h.max_text = (((*h.text)->nLines) - 
            h.lines_vis) * (*h.text)->lineHeight;
    SetCtlMax(h.text_scroll, h.max_text); 
    }

  ShowWindow(the_dialog);
  do {
    ModalDialog(help_filter, &item_hit);
    if (item_hit == HELP_OK)
      done = TRUE;
    } while (!done);
    
  TEDispose(h.text);
  LDispose(h.topics);
  DisposDialog(the_dialog);
  return TRUE;
  }


/************************************************
 * This routine handles activating and updating 
 * of the scroller and the box area. We must 
 * handle mouse downs in the scroller and text 
 * box, passing back TRUE, and pass FALSE back 
 * for everything else so the Dialog Manager does
 * his thing on the other items. */
pascal Boolean help_filter(dp, ep, ip)
WindowPtr dp;
EventRecord *ep;
int *ip;
  {
  int part;
  ControlHandle ch;
  char tempchar;  /* check keydown for RETURN */
  Point mouse_loc;
  int start_value, end_value, dummy, delta;
  long a_cell;
  int cell_num;
  Handle the_help;
  int buf_size;
  int scr_int;       /* scratch variable */
  Handle scr_handle; /* scratch variable */
  Rect scr_rect;     /* scratch variable */
  
  switch(ep->what)
    {
    case updateEvt:
      /* is the update event for this window? */
      if (ep->message == (long)dp)
        {
        /* outline default button */
        GetDItem(dp, HELP_OK, &scr_int, 
                 &scr_handle, &scr_rect);
        InsetRect(&scr_rect, -4, -4);
        PenSize(3, 3);
        FrameRoundRect(&scr_rect, 16, 16);
        PenNormal();
        /* draw boxes around topics, text */
        FrameRect(&h.topic_box);
        FrameRect(&h.text_box);
        /* update contents of boxes */
        EraseRect(&h.v_rect);
        TEUpdate(&h.v_rect, h.text);
        LUpdate(dp->visRgn, h.topics);
        }
      return FALSE;

    case keyDown: 
      /* convert return key to OK button */
      tempchar = BitAnd(ep->message, 
                        charCodeMask);
      if (tempchar == '\r')
        {
        *ip = HELP_OK;
        return TRUE;
        }
      return FALSE;
      
    case mouseDown:
      /* get our own copy of coordinates */
      mouse_loc = ep->where;
      GlobalToLocal(&mouse_loc);
      
      part = FindControl(mouse_loc, dp, &ch); 
      if (part > 0)
        {
        /* is click in a scroll bar? */
        if (ch == h.text_scroll)
          {
          if (part == inThumb)
            {
            if(TrackControl(ch, mouse_loc, NULL))
              {
              /* reposition help text */
              delta = h.offset - 
                      GetCtlValue(h.text_scroll);
              TEScroll(0, delta, h.text);
              h.offset -= delta;
              }
            }
          else
            TrackControl(ch, mouse_loc, 
                         help_action);
          return TRUE;
          }
        else if (ch == (*h.topics)->vScroll)
          {
          LClick(mouse_loc, ep->modifiers, 
                 h.topics);
          return TRUE;
          }
        else
          return FALSE;
        }
      else if (PtInRect(mouse_loc, *h.topics))
        {
        /* click was in topics list so find which
         * topic was selected and display the
         * proper HELP resource */
        LClick(mouse_loc, ep->modifiers, 
               h.topics);
        a_cell = 0;
        if (LGetSelect(TRUE, &a_cell, h.topics))
          cell_num = HiWord(a_cell);
        if (cell_num >= 0 && 
            cell_num != h.last_one)
          {
          /* get rid of the old text */
          TEDeactivate(h.text);
          TESetSelect(0L, 32767L, h.text);
          TEDelete(h.text);
          if (cell_num < h.num_topics)
            {
            the_help = GetResource('HELP', 
                          h.help_id[cell_num]);
            buf_size = SizeResource(the_help);
            }
          else /* no topic selected so no help */
            buf_size = 0;
          if (buf_size > 0)
            {
            HLock(the_help);
            TEInsert(*the_help, (long)buf_size, 
                     h.text);
            HUnlock(the_help);
            }
          
          /* reset the scroll bar */
          SetCtlValue(h.text_scroll, 0);
          /* reposition the help text */
          delta = h.offset - 
                  GetCtlValue(h.text_scroll);
          TEScroll(0, delta, h.text);
          h.offset -= delta;
          /* scroll bar necessary? */
          if ((*h.text)->nLines > h.lines_vis)
            {
            HiliteControl(h.text_scroll, 
                          ACTIVATE);
            h.max_text = (((*h.text)->nLines) - 
                         h.lines_vis) * 
                         (*h.text)->lineHeight;
            SetCtlMax(h.text_scroll, h.max_text); 
            }
          else
            HiliteControl(h.text_scroll, 
                          INACTIVATE);
          /* finally, save the new topic */
          h.last_one = cell_num;
          }
        return TRUE;
        }
      return FALSE;
  
    default:
      return FALSE;
    }
  } 

/************************************************
 * This routine is called by the Toolbox while 
 * executing the TrackControl() routine. It has 
 * to take care of scrolling the text when the 
 * up/down arrow and page parts of the scrollbar 
 * are clicked in. */
pascal void help_action(the_scroll, partcode)
ControlHandle the_scroll;
int partcode;
  {
  int value, delta;
  
  switch (partcode)
    {
    case inUpButton:
      value = GetCtlValue(the_scroll);
      value = (value-(*h.text)->lineHeight > 0)
       ? value-(*h.text)->lineHeight 
       : 0;
      SetCtlValue(the_scroll, value);
      break;
    case inPageUp:  /* move 6 lines at a time */
      value = GetCtlValue(the_scroll);
      value = (value-6*(*h.text)->lineHeight > 0)
       ? value-6*(*h.text)->lineHeight 
       : 0;
      SetCtlValue(the_scroll, value);
      break;
    case inDownButton:
      value = GetCtlValue(the_scroll);
      value = (value + (*h.text)->lineHeight < 
               h.max_text) 
       ? value + (*h.text)->lineHeight 
       : h.max_text;
      SetCtlValue(the_scroll, value);
      break;
    case inPageDown:/* move 6 lines at a time */
      value = GetCtlValue(the_scroll);
      value = (value + 6*(*h.text)->lineHeight < 
              h.max_text) 
       ? value + 6*(*h.text)->lineHeight 
       : h.max_text;
      SetCtlValue(the_scroll, value);
      break;
    }
  
  delta = h.offset - GetCtlValue(h.text_scroll);
  TEScroll(0, delta, h.text);
  h.offset -= delta;
  }

/*********************************************************
 * atoi.c - much smaller than unix & stdio libraries 
 *
 * WN Rausch
 * January 1987
 **********************************************************/

#include <MacTypes.h>
#include <pascal.h>
#include <strings.h>

#define isspace(c) (c == ' ' || c == '\t')
#define ZERO 48

/*********************************************************/
atoi(string)
register char *string;   /* must be NULL terminated */
  {
  register long answer = 0L;
  Boolean negative = FALSE;
  
  while (isspace(*string))
   string++;
  if (*string == '-')
   negative = TRUE;  
  while (*string)
   {
   answer = (answer * 10) + (*string - ZERO);
   string++;
   }  
  if (negative)
   answer = 0 - answer; 
  return (int)answer;
  }

/* Resource File for Help.rsrc in Rez MPW Format. Note that the help 
string resources are given here in ascii format and should be typed in 
with ResEdit as in this form, Rez probably will gag. */

resource 'DITL' (256, "help", purgeable) {
 { /* array DITLarray: 3 elements */
 /* [1] */
 {244, 171, 263, 243},
 Button {
 enabled,
 "OK"
 };
 /* [2] */
 {36, 172, 231, 401},
 UserItem {
 enabled
 };
 /* [3] */
 {36, 7, 231, 165},
 UserItem {
 enabled
 }
 }
};
resource 'DLOG' (256, "help", purgeable) {
 {40, 52, 314, 460},
 dBoxProc,
 invisible,
 noGoAway,
 0x0,
 256,
 "help"
};
resource 'MENU' (256, "File", preload) {
 256,
 textMenuProc,
 allEnabled,
 enabled,
 "File",
 { /* array: 3 elements */
 /* [1] */
 "About...", noIcon, noKey, noMark, plain;
 /* [2] */
 "Help demo...", noIcon, noKey, noMark, plain;
 /* [3] */
 "Quit", noIcon, noKey, noMark, plain
 }
};
resource 'STR#' (256, "help topics") {
 { /* array StringArray: 17 elements */
 /* [1] */
 "Introduction\\1";
 /* [2] */
 "More info about HELP\\7";
 /* [3] */
 "And even more\\4";
 /* [4] */
 "Dummy topic 1\\100";
 /* [5] */
 "Dummy topic 2\\101";
 /* [6] */
 "   Dummy sub-topic 2.1\\200";
 /* [7] */
 "   Dummy sub-topic 2.2\\201";
 /* [8] */
 "Dummy topic 3\\400";
 /* [9] */
 "Dummy topic 4\\333";
 /* [10] */
 "   Dummy sub-topic 4.1\\334";
 /* [11] */
 "   Dummy sub-topic 4.2\\332";
 /* [12] */
 "Dummy topic 5\\300";
 /* [13] */
 "Dummy topic 6\\500";
 /* [14] */
 "   Dummy sub-topic 6.1\\332";
 /* [15] */
 "   Dummy sub-topic 6.2\\332";
 /* [16] */
 "   Dummy sub-topic 6.3\\332";
 /* [17] */
 " Dummy sub-topic 7\\335"
 }
};
data 'HELP' (1, "intro", purgeable) {
 This demo program is used to demonstrate the multi-topic on-line help 
function. As many as 100 distinct help topics can exist. (This is adjustable 
by changing the value in: “#define MAX_HELP 100” in help.c)
   Use ResEdit to create the HELP resources (they’re just simple ASCII 
text), or write your own program to create them. 
 Feel free to use this code in your applications. I’d appreciate comments.
 William Rausch
 Battelle, Pacific Northwest Labs
 Math/1406
 Battelle Blvd.
 Richland, WA 99352
 509-375-2249
};

data 'HELP' (100, purgeable) {
 These are just some words. 
};
data 'HELP' (101, purgeable) {
 These are just some words to take space up so that the scroll bar will 
operate. 
};
data 'HELP' (4, "stillmore", purgeable) {
    The help dialog contains an OK button and two boxes, one for the 
list of topics and one to show the help information for the currently 
selected topic. The function builds the list of topics dynamically, using 
a STR# resource number passed to it by the calling routine.
    Each string in the STR# resouce contains a topic and a reference 
number. The reference number is the ID of a HELP resource. Whenever the 
user selects a topic, the ASCII text from the corresponding HELP resource 
is displayed in this scrollable TextEdit record. 
};
data 'HELP' (200, purgeable) {
 MacTutor™ is a great magazine for Macintosh programmers. 
};
data 'HELP' (201, purgeable) {
  Not much here. This must be a dull topic.
};
data 'HELP' (300, purgeable) {
  This will be a HELP resource someday. 
};
data 'HELP' (7, "morehelp", purgeable) {
 It is very easy to create the HELP resources using ResEdit from Apple 
Computer. The version I used is “1.1 minus D”. The biggest improvement 
I’ve noticed is that now you can edit unknown resources as hex or ASCII. 
To create this resource, I just typed into the ASCII portion of the window. 
  
 I’ve also used an editor and ResEdit together in Switcher and that works 
OK too. Set the editor to autowrap though, because you don’t want extraneous 
carriage returns in your HELP resource. Desk Accessory editors work well 
also. 
};
data 'HELP' (500, purgeable) {
 I don’t have much to say here. 
};
data 'HELP' (333, purgeable) {
 Note that any printing characters can be used: ™£¢•¶§. 
};
data 'HELP' (332, purgeable) {
   This particular HELP resource is referenced by several different topics. 
In many cases this can be a useful feature, as many key words may apply 
to the same concept. 
};
data 'HELP' (334, purgeable) {
 This is number 334. 
};
data 'HELP' (400, purgeable) {
 This is number 400. 
};
data 'HELP' (335, purgeable) {
 The very last one is this one for topic seven. 
};
 

Community Search:
MacTech Search:

Software Updates via MacUpdate

SpamSieve 2.9.38 - Robust spam filter fo...
SpamSieve is a robust spam filter for major email clients that uses powerful Bayesian spam filtering. SpamSieve understands what your spam looks like in order to block it all, but also learns what... Read more
TeamViewer 15.0.8397 - Establish remote...
TeamViewer gives you remote control of any computer or Mac over the Internet within seconds or can be used for online meetings. Find out why more than 200 million users trust TeamViewer! Free for non... Read more
SteerMouse 5.4.3 - Powerful third-party...
SteerMouse is an advanced driver for USB and Bluetooth mice. SteerMouse can assign various functions to buttons that Apple's software does not allow, including double-clicks, modifier clicks,... Read more
Toast Titanium 18.2.1 - The ultimate med...
Roxio Toast Titanium, the leading DVD burner for Mac, makes burning even better, adding Roxio Secure Burn to protect your files on disc and USB in Mac- or Windows-compatible formats. Get more style... Read more
HoudahSpot 5.0.11 - Advanced file-search...
HoudahSpot is a versatile desktop search tool. Use HoudahSpot to locate hard-to-find files and keep frequently used files within reach. HoudahSpot will immediately feel familiar. It works just the... Read more
ClipGrab 3.8.6 - Download videos from Yo...
ClipGrab is a free downloader and converter for YouTube, Vimeo, Facebook and many other online video sites. It converts downloaded videos to MPEG4, MP3 or other formats in just one easy step Version... Read more
ExpanDrive 7.4.0 - Access cloud storage...
ExpanDrive builds cloud storage in every application, acts just like a USB drive plugged into your Mac. With ExpanDrive, you can securely access any remote file server directly from the Finder or... Read more
Adobe Dreamweaver CC 2020 20.0 - Build w...
Dreamweaver CC 2020 is available as part of Adobe Creative Cloud for as little as $20.99/month (or $9.99/month if you're a previous Dreamweaver customer). Adobe Dreamweaver CC 2020 allows you to... Read more
Eye Candy 7.2.3.85 - 30 professional Pho...
Eye Candy renders realistic effects that are difficult or impossible to achieve in Photoshop alone, such as Fire, Chrome, and the new Lightning. Effects like Animal Fur, Smoke, and Reptile Skin are... Read more
Sparkle Pro 2.8.5 - Visual website creat...
Sparkle Pro will change your mind if you thought building websites wasn't for you. Sparkle is the intuitive site builder that lets you create sites for your online portfolio, team or band pages, or... Read more

Latest Forum Discussions

See All

Pre-register for Hello Kitty AR: Kawaii...
Hello Kitty — the cute cat that launched a multi-billion-pound franchise — has been brought to life… sort of. Sanrio has teamed up with the Bublar Group to create a new mobile game that uses AR tech to turn the real world into Hello Kitty’s... | Read more »
Gorgeous and tranquil puzzler Spring Fal...
One-man indie studio SPARSE//GameDev has now launched its tranquil puzzler, Spring Falls. It's described as "a peaceful puzzle game about water, erosion, and watching things grow". [Read more] | Read more »
Black Desert Mobile gets an official rel...
Pearl Abyss has just announced that its highly-anticipated MMO, Black Desert Mobile, will launch globally for iOS and Android on December 11th. [Read more] | Read more »
Another Eden receives new a episode, cha...
Another Eden, WFS' popular RPG, has received another update that brings new story content to the game alongside a few new heroes to discover. [Read more] | Read more »
Overdox guide - Tips and tricks for begi...
Overdox is a clever battle royale that changes things up by adding MOBA mechanics and melee combat to the mix. This new hybrid game can be quite a bit to take in at first, so we’ve put together a list of tips to help you get a leg up on the... | Read more »
Roterra Extreme - Great Escape is a pers...
Roterra Extreme – Great Escape has been described by developers Dig-It Games as a mini-sequel to their acclaimed title Roterra: Flip the Fairytale. It continues that game's tradition of messing with which way is up, tasking you with solving... | Read more »
Hearthstone: Battlegrounds open beta lau...
Remember earlier this year when auto battlers were the latest hotness? We had Auto Chess, DOTA Underlords, Chess Rush, and more all gunning for our attention. They all had their own reasons to play, but, at least from where I'm standing, most... | Read more »
The House of Da Vinci 2 gets a new gamep...
The House of Da Vinci launched all the way back in 2017. Now, developer Blue Brain Games is gearing up to deliver a second dose of The Room-inspired puzzling. Some fresh details have now emerged, alongside the game's first official trailer. [Read... | Read more »
Shoot 'em up action awaits in Battl...
BattleBrew Productions has just introduced another entry into its award winning, barrelpunk inspired, BattleSky Brigade series. Whilst its previous title BattleSky Brigade TapTap provided fans with idle town building gameplay, this time the... | Read more »
Arcade classic R-Type Dimensions EX blas...
If you're a long time fan of shmups and have been looking for something to play lately, Tozai Games may have just released an ideal game for you on iOS. R-Type Dimensions EX brings the first R-Type and its sequel to iOS devices. [Read more] | Read more »

Price Scanner via MacPrices.net

13″ 2.4GHz MacBook Pros available for up to $...
Apple has a full line of Certified Refurbished 2019 13″ 2.4GHz 4-Core Touch Bar MacBook Pros available starting at $1529 and up to $300 off MSRP. Apple’s one-year warranty is included, shipping is... Read more
New at T-Mobile: Switch to T-Mobile, and get...
T-Mobile is offering a free 64GB iPhone 8 for new customers who switch to T-Mobile and open a new line of service. Eligible trade-in required, and discount applied over a 24 month period. The fine... Read more
Xfinity Mobile’s Black Friday Apple savings:...
Take $250 off the purchase of any iPhone at Xfinity Mobile with a new line activation, and transfer of phone number to Xfinity Mobile, through December 8, 2019. This includes Apple’s new iPhone 11... Read more
2019 13″ 1.4GHz MacBook Pros available starti...
Apple has a full line of Certified Refurbished 2019 13″ 1.4GHz 4-Core Touch Bar MacBook Pros available starting at $1099 and up to $230 off MSRP. Apple’s one-year warranty is included, shipping is... Read more
Save up to $350 on a 21″ or 27″ iMac with the...
Apple has Certified Refurbished 2019 21″ & 27″ iMacs available starting at $929 and up to $350 off the cost of new models. Apple’s one-year warranty is standard, shipping is free, and each iMac... Read more
Early Holiday 2019 Sale: B&H again offers...
B&H Photo has 10.2″ iPads on sale again for $30 off Apple’s MSRP, starting at $299, as part of their early Holiday 2019 sale. Overnight shipping is free to many addresses in the US: – 10.2″ 32GB... Read more
Apple iMacs on sale today at B&H Photo fo...
B&H Photo has new 2019 21″ and 27″ 5K iMacs on stock today and on sale for up to $150 off Apple’s MSRP. Overnight shipping is free to many locations in the US. These are the same iMacs sold by... Read more
2018 4 and 6-Core Mac minis on sale today for...
Apple resellers are offering new 2018 4-Core and 6-Core Mac minis for $80-$100 off MSRP for a limited time. B&H Photo has the new 2018 4-Core and 6-Core Mac minis on sale for up to $100 off Apple... Read more
Early Holiday 2019 sale at B&H Photo: 12....
B&H Photo has new 12.9″ iPad Pros on sale for up to $120 off Apple’s MSRP as part of their early Holiday 2019 sale. Overnight shipping is free to many addresses in the US: – 12.9″ 64GB WiFi iPad... Read more
8-Core iMac Pro on sale today for $4499 at B...
B&H Photo has the base 8-Core 3.2GHz 32GB/1TB iMac Pro on sale today for $4499 — $500 off Apple’s MSRP. Shipping is free. Their price is the lowest available for a new iMac Pro from any Apple... Read more

Jobs Board

*Apple* Health Benefit Specialist - Call Cen...
Description ** Apple Health Benefit Specialist - Call Center (MAS 3/MACSC)** **Olympia, WA Multiple Positions** *The ideal candidate for this position will have Read more
Hair Stylist - *Apple* Blossom Mall - JCPen...
Hair Stylist - Apple Blossom Mall Location:Winchester, VA, United States- Apple Blossom Mall 1850 Apple Blossom Dr Job ID:1065040Salon Professionals Job Read more
*Apple* Mobility Pro - Best Buy (United Stat...
**747088BR** **Job Title:** Apple Mobility Pro **Job Category:** Store Associates **Store NUmber or Department:** 000297-Reston-Store **Job Description:** At Best Read more
Nurse Practitioner - Field Based (San Bernard...
Nurse Practitioner - Field Based (San Bernardino, CA, Apple Valley, Hesperia) **Location:** **United States** **Requisition #:** PS30312 **Post Date:** Nov 11, 2019 Read more
Best Buy *Apple* Computing Master - Best Bu...
**747061BR** **Job Title:** Best Buy Apple Computing Master **Job Category:** Store Associates **Store NUmber or Department:** 000647-Kildeer-Store **Job Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.