Re: Mouse entering/leaving a window surface

• Subject: Re: Mouse entering/leaving a window surface
• From: Turbo3D <email@hidden>
• Date: Wed, 13 Jun 2007 14:54:00 +0200
• Delivered-to: email@hidden
• Delivered-to: email@hidden

Perhaps Eric (hello, Eric !.....)  could put some light no this..

Thank you

JP

Le 13 juin 07 à 07:56, Philip Aker a écrit :

On 2007-06-12, at 20:19:21, Turbo3D wrote:

How can I get events that tell when the mouse enter or leave a window surface (Carbon) ?
I tried to attach a handle on the window root control.., but the handler is never called ...

I don't know if it suits your purpose (doesn't do the title bar area), but installing a tracking area on the content view works. Something like this:

OSStatus HIView_InstallTrackingArea( HIViewRef theView ) {

OSStatus err = noErr;
HIViewTrackingAreaRef track_area = NULL;
EventTypeSpec kTrackEvents[] = {{kEventClassControl, kEventControlTrackingAreaEntered}, {kEventClassControl, kEventControlTrackingAreaExited}};

if( err == noErr ) {
err = HIViewNewTrackingArea( theView, NULL, 0, &track_area );
}
if( err == noErr ) {
err = InstallControlEventHandler( theView, TrackEventHandler, GetEventTypeCount( kTrackEvents ), kTrackEvents, theView, NULL );
}

return err;
}


OSStatus TrackEventHandler( EventHandlerCallRef theCallRef, EventRef ioEvent, void *theData ) {

OSStatus res = eventNotHandledErr;
UInt32 evcl= GetEventClass( ioEvent );
UInt32 evid = GetEventKind( ioEvent );

switch( evcl ) {
case kEventClassControl: {
switch( evid ) {
case kEventControlTrackingAreaEntered: {
res = SetThemeCursor( kThemeCrossCursor );
break;
}
case kEventControlTrackingAreaExited: {
res = SetThemeCursor( kThemeArrowCursor );
break;
}
}
}
}

return res;
}


HIViewRef content = NULL;
err = HIViewFindByID( HIViewGetRoot( window ), kHIViewWindowContentID, &content );
err = HIView_InstallTrackingArea( content );

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