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Re: Can't get mouse hit on custom view
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Re: Can't get mouse hit on custom view


On May 28, 2007, at 9:24 AM, Carlos Eduardo Mello wrote:

Hi,

I need to have different behaviours in my custom view for single click and double click. After reading headers and docs and sample code for carbon events, controls, hiviews, etc., I figured I would need to check for a mouse hit in my view and then check the click count parameter. So, I registered for kEventControlHitTest and kEventControlHit. I believe I am handling the HitTest correctly ( code below ),

Why do you believe this? Have you verified that CGRectContainsPoint is returning the expected result when you click the view and that BackViewHitTest is returning the expected error code?

but I never get the Hit event. [ OS 10.4.9, XCode 2.4, G4 ]

Then that would suggest you *aren't* handling the HitTest event correctly.

Larry


Could any body point out my mistakes/bad assumptions/etc.?
Am I doing everything wrong?

// From custom-view event handler...

case kEventClassControl:
		{
			switch ( eventKind )
			{
				case kEventControlInitialize:
					err = noErr;
					break;
				case kEventControlDraw:
					err = theCustomView->BackViewDraw( inEvent );
					break;
				case kEventControlHitTest:
					err = theCustomView->BackViewHitTest( inEvent );
					break;
				case kEventControlGetPartRegion:
					err = theCustomView->BackViewGetRegion( inEvent );
					break;
				case kEventControlHit:
					err = theCustomView->ProcessMouseClick( inEvent );
					break;
			}
			break;
		}



OSStatus MyCustomView::BackViewHitTest( EventRef inEvent )
{
OSStatus err = eventNotHandledErr;
ControlPartCode partCode;
HIPoint mouseLoc;
HIRect hiBounds;

err = GetEventParameter( inEvent, kEventParamMouseLocation, typeHIPoint, NULL, sizeof(mouseLoc), NULL, &mouseLoc );
if(!err)
{
// p.s.: back view is my internal reference to the custom view
err = HIViewGetBounds( backView, &hiBounds );
if(!err)
{
if( CGRectContainsPoint( hiBounds, mouseLoc ) )
partCode = kControlButtonPart;
else
partCode = kControlNoPart;
err = SetEventParameter( inEvent, kEventParamControlPart, typeControlPartCode, sizeof(partCode), &partCode );
}
}
return err;
}



Dr. Carlos Eduardo Mello (email@hidden)
Music Technology Lab, Music Department
University of Brasília, Brazil

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 >Can't get mouse hit on custom view (From: Carlos Eduardo Mello <email@hidden>)























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