I found that the program does not go into the below if statement in the
penDownEvent case,
why and how can I correct this?
if (RctPtInRectangle(eventP->screenX,
eventP->screenY, &gDrawRect))
thx!!
"KEN" <[EMAIL PROTECTED]> �b�l�� news:[EMAIL PROTECTED] �����g...
> I want to write a simple doodling program just for the stylus to draw
> something
> I modified the MainFormHandleEvent of the simple Hello Palm and added
some
> global variables as shown below.
> But I found that it doesn't work and it shows nothing when I draw using
> stylus.
> Any problem with this program ?
>
>
> // Global variables
> RectangleType gDrawRect;
> Int16 gX, gY;
> Boolean gPenDown;
>
> static Boolean MainFormHandleEvent(EventType * eventP)
> {
> Boolean handled = false;
> FormType * frmP;
>
> switch (eventP->eType)
> {
> case menuEvent:
> return MainFormDoCommand(eventP->data.menu.itemID);
>
> case frmOpenEvent:
> frmP = FrmGetActiveForm();
> MainFormInit(frmP);
> FrmDrawForm(frmP);
> handled = true;
> break;
>
> case frmUpdateEvent:
> break;
>
> case penDownEvent:
> if (RctPtInRectangle(eventP->screenX,
> eventP->screenY, &gDrawRect))
> {
> gX = eventP->screenX;
> gY = eventP->screenY;
> gPenDown = true;
> handled = true;
> }
> break;
>
> case penMoveEvent:
> if (RctPtInRectangle(eventP->screenX,
> eventP->screenY, &gDrawRect) && gPenDown)
> {
> Int16 newX = eventP->screenX;
> Int16 newY = eventP->screenY;
>
> WinDrawLine(gX, gY, newX, newY);
> gX = newX;
> gY = newY;
> handled = true;
> }
> break;
>
> case penUpEvent:
> if (RctPtInRectangle(eventP->screenX,
> eventP->screenY, &gDrawRect) && gPenDown)
> {
> Int16 newX = eventP->screenX;
> Int16 newY = eventP->screenY;
>
> WinDrawLine(gX, gY, newX, newY);
> gX = gDrawRect.topLeft.x;
> gY = gDrawRect.topLeft.y;
> gPenDown = false;
> handled = true;
> }
> break;
>
> default:
> break;
>
> } // end of switch
>
> return handled;
>
> }
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