Implement zoom with WM_TOUCH

Asked Mar 05 '18 at 14:37

Active Mar 06 '18 at 14:35

Viewed 262 times

I need to implement a zoom in/out in a Windows Apllication which runs on a multi-touch screen.

After some progress, I understand I can't have both WM_GESTURE and WM_TOUCH at the same time. Before I was catching WM_GESTURE and then checking if GID_ZOOM was being sent, but know I must zoom in and out another way.

How should I implement this now using WM_TOUCH?

Thank you all!

edited Mar 06 '18 at 14:35

asked Mar 05 '18 at 14:37

Rui Campião

You shouldn't. Unless you're developing exclusively for Windows 7, you should be using [WM_POINTER](https://stackoverflow.com/questions/23790602/wm-touch-vs-wm-pointer) instead. – Eric Brown May 30 '18 at 16:40
Unfortunately it's exclusisvely for windows 7. I achieved what I wanted with WM_TOUCH API, using IManipulationProcessor and ManipulationEventSink. Not easy but it works very well. Thanks! – Rui Campião Dec 20 '18 at 17:36

Implement zoom with WM_TOUCH

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