Mouse pressed/released in same frame with touch

[funkmeister]

Hi all,

I am developing an application using OF 0.9.3 in Windows under VS2015.

I want my GUI buttons to react to the touch down event in order to reduce the button size while the button is pressed.
To do so, I remember the state of the button, and in the draw() event, change the button size depending on the state.

With a mouse cursor, all works as expected: the button is drawn unpressed, then the mousePressed event is called, then the button is drawn pressed, then the mouseReleased event is called, and finally the button is drawn unpressed.

We are building this app to run on a Lenovo Yoga Home all-in-one computer running Windows 10 Home. It is touch-enabled.

When I run the app on the all-in-one computer, the mousePressed() and mouseReleased() events are called in the same frame, and the push-down effect is therefore not visible.
If I move the finger after pushing down (a drag), the events are registered in different frames It really looks like for a quick touch down/up, the OS waits until the touch up to send both the touch down and up events.

We have looked at the operating system options and could not find a workaround.

Has anyone ever seen this problem? What can we do to fix it?

Thanks,
Bruno

[SebastianSobotka]

Hi. I think I’ve got a similar problem described here:

Mouse and touch events on Windows with touch display

I have a problem with mouse events on Windows with touch display. My class “ofxImgButton” has got mousePressed and mouseReleased events registered. Button changes for example the size when it’s clicked. Everything works fine on machine with mouse but it doesn’t work properly on touch display. The button update isn’t visible. It’s visible when there’s a “double tap” but then it triggers something twice. The problem is that unfortunately I don’t have an access to touch display at the moment. W…

Iam not sure but maybe our issues are related to:

trentbrooks/ofxWinTouchHook

[funkmeister]

Hi Sebastian. It looks like the same problem. Maybe if you log the frame number when your events are triggered using ofGetFrameNum() you can confirm that the press and release buttons are called in the same frame.

[roymacdonald]

Mouse and touch events on Windows with touch display

From my experience, you do not need to use touch-specific events. Those touch-enabled Windows machines will send the events as touch in OF. Also, you should specify which release of OF you are using.