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authorSven Gothel <[email protected]>2019-03-27 18:53:27 +0100
committerSven Gothel <[email protected]>2019-03-27 18:53:27 +0100
commitec4721c5b81ca39355f660294bf45edc0a1584da (patch)
tree6165827cb2e6dc8bcbfde345649c548b75680427 /jnlp-files/jogl-all-noawt.jnlp
parent9e06adb30c8bf01e074e82cde1ebded74b62a805 (diff)
Bug 1348: Fix X11 XI Multitouch
I got access to a touchscreen laptop w/ Debian 9, hence I could fix and test the implementation. X11 DisplayDriver.java: - Store and pass through xi_opcode of XI extension, queried at initialization stage X11Window.c Fixes: - Initialize JavaWindow's xiTouchCoords[].id w/ -1, as required to track the pointer - Pass through xi_opcode as stored in X11 DisplayDriver X11Display.c Fixes: - sendTouchScreenEvent: Throw RuntimeException if 0 > actionId (Internal Error: based on xiTouchCoords[].id tracking) - DispatchMessages's windowPointer determination: -- Query potenial XI Event first: IF XI Event, must use XIDeviceEvent's event Window -- Only IF not an XI Event, we can use evt.xany.window as the event window - DispatchMessages's XI Event Handling: -- Always break deviceid search loop if id found, preserving index and time spend Works on my Debian 9 device, tested w/ com.jogamp.opengl.test.junit.jogl.demos.es2.newt.TestGearsES2NEWT: - One pointer (finger) press, drag and release (click) - PinchToZoomGesture works - DoubleTabScrollGesture works +++ Potential Issues: JavaWindow's xiTouchCoords[].id accuracy is crucial to pointer tracking during XI_TouchBegin -> XI_TouchUpdate -> XI_TouchEnd. In the normal course of action: - XI_TouchBegin sets the id, assuming it is yet set - XI_TouchUpdate assumes it is set - XI_TouchEnd clears the id, assuming it is set This field in the JavaWindow array only gets reset to -1 once at native window creation. We may need to figure out when to reset this field to -1. If the XI_TouchEnd events would get lost for whatever reason, the above tracking state would be broken.
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