here's a piece of code that is crashing the system (from a Codewarrior C++
app skeleton)
It is similar to the call structure I have.
If I call the drawing code from withing the AppHandleEvent, it will NOT
work.
Only if I call it from FrmDrawOpen will it work.
Why is that?
Can the system be changing the current drawing window without changing it
back to
the main form?
/***********************************************************************
*
* FUNCTION: MainFormHandleEvent
*
* DESCRIPTION: This routine is the event handler for the
* "MainForm" of this application.
*
* PARAMETERS: eventP - a pointer to an EventType structure
*
* RETURNED: true if the event has handle and should not be passed
* to a higher level handler.
*
* REVISION HISTORY:
*
*
***********************************************************************/
static Boolean MainFormHandleEvent(EventPtr eventP)
{
Boolean handled = false;
FormPtr frmP;
RectangleType rc;
switch (eventP->eType)
{
case menuEvent:
return MainFormDoCommand(eventP->data.menu.itemID);
case frmOpenEvent:
frmP = FrmGetActiveForm();
MainFormInit( frmP);
FrmDrawForm ( frmP);
rc.topLeft.x = rc.topLeft.y = 15;
rc.extent.x = rc.extent.y = 25;
WinDrawRectangleFrame(rectangleFrame, &rc);
handled = true;
break;
default:
break;
}
return handled;
}
/***********************************************************************
*
* FUNCTION: AppHandleEvent
*
* DESCRIPTION: This routine loads form resources and set the event
* handler for the form loaded.
*
* PARAMETERS: event - a pointer to an EventType structure
*
* RETURNED: true if the event has handle and should not be passed
* to a higher level handler.
*
* REVISION HISTORY:
*
*
***********************************************************************/
static Boolean AppHandleEvent(EventPtr eventP)
{
UInt16 formId;
FormPtr frmP;
RectangleType rc;
if (eventP->eType == frmLoadEvent)
{
// Load the form resource.
formId = eventP->data.frmLoad.formID;
frmP = FrmInitForm(formId);
FrmSetActiveForm(frmP);
// Set the event handler for the form. The handler of the currently
// active form is called by FrmHandleEvent each time is receives an
// event.
switch (formId)
{
case MainForm:
FrmSetEventHandler(frmP, MainFormHandleEvent);
/* DOES NOT WORK
rc.topLeft.x = rc.topLeft.y = 15;
rc.extent.x = rc.extent.y = 25;
WinDrawRectangleFrame(rectangleFrame, &rc);
*/
break;
default:
// ErrFatalDisplay("Invalid Form Load Event");
break;
}
return true;
}
else if ( eventP->eType == frmOpenEvent )
{
/* DOES NOT WORK
rc.topLeft.x = rc.topLeft.y = 15;
rc.extent.x = rc.extent.y = 25;
WinDrawRectangleFrame(rectangleFrame, &rc);
*/
}
return false;
}
- Darren Lee Ang
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