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trackcontrol problem with pop-up menu

Posted on 1998-09-05
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Last Modified: 2013-12-26
I thought that TrackControl took care of displaying the associated menu when a mousedown event occured in the control.

popDownHdl = GetNewControl( 130, myWindow); // System 7 pop-up

      switch (FindWindow(myEvent.where,&hitWindow))      {
                                    case inContent:
                                    
                                          GlobalToLocal(&myEvent.where);
                                          hitControl=FindControl(myEvent.where,myWindow,&hitControlHdl);
                                        if(hitControlHdl == popDownHdl)
                                          {      Handle selection
        }
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Question by:dwp090598
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Accepted Solution

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boonstra earned 200 total points
ID: 1291521
TrackControl does take care of displaying the menu when a mouseDown occurs.  The code snippet below works properly.  Things to check: (1) is your popDownHandle nil, (2) does your popup control have the correct procID (1008), (3) is the menu properly associated with the control ((**popDownHandle).contrlMin == menuID, or (4) are you sending the correct actionProc value to TrackControl (should be -1),

Working snippet:

ControlHandle popDownHandle;
.
      popDownHandle = GetNewControl(130, gWindow);
      if (popDownHandle==nil) DebugStr("\p nil control handle");
.

static void DoPopupMenu(Point pt,ControlHandle ctl)
{
      short part,menuItem;
      part = TrackControl(ctl,pt,(ControlActionUPP)-1);
      menuItem = GetControlValue(ctl);
      /* process menu selection */
}

static int DoMouse(EventRecord *ev)
{
      WindowPtr wind;
      short part;
      int res = 0;

      part = FindWindow(ev->where, &wind);
            
      switch (part) {
            case inContent:
            {
                  ControlHandle theControl;
                  int part;
                  Point pt;
                  pt = ev->where;
                  GlobalToLocal(&pt);
                  part = FindControl(pt, wind, &theControl);
                  if (theControl==popDownHandle) {
                        DoPopupMenu(pt,theControl);
                  }
                  break;
            }
                  
      }
      
      return res;
}

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