mouseX/mouseY and surfaceTouchEvent

Android Processing

gary

mouseX/mouseY and surfaceTouchEvent

in Android Processing • 3 years ago

The Processing for Android wiki states that I'll need super.surfaceTouchEvent() to get proper mouseX/mouseY variables.Currently, my code is reading mouseX/mouseY at the start of the mousePressed(), mouseDragged() and mouseReleased() functions. So do I essentially call super.surfaceTouchEvent in each of these? I mostly just store mouseX/mouseY until mouseReleased occurs. Here's my declaration of surfaceTouchEvent():

public boolean surfaceTouchEvent(MotionEvent event) {
float xoff = mouseX;
float yoff = mouseY;
return super.surfaceTouchEvent(event);
}

Here I'm storing mouseX/mouseY whenever surfaceTouchEvent is called. Is this all I need to do here or should the processing for Pressed/Dragged/Released be moved here? Any hints on making use of super.surfaceTouchEvent() would be appreciated.

EDIT: Note that the touch/cursor position is working as is, without using surfaceTouchEvent.

Much thanks,
Gary

Replies(3)

ben.fry

Re: mouseX/mouseY and surfaceTouchEvent

3 years ago

Right, so that's backwards—mouseX and mouseY get updated when you call 'super.surfaceTouchEvent', so basically you'll always be one step behind. So better to do:

public boolean surfaceTouchEvent(MotionEvent event) {
surfaceTouchEvent(event);
float xoff = mouseX;
float yoff = mouseY;
return true;
}

but you shouldn't need to do that unless you're doing something especially complicated. If you just want to record mouseX/Y points, do the same thing you would with the desktop version.

gary

Re: Re: mouseX/mouseY and surfaceTouchEvent

3 years ago

Thanks very much for the reply.

I have not implemented your code yet however, after tweaking/debugging my mousePressed/Dragged/Released code, I see the use of mouseX/mouseY is fine. I don't see a difference when compared to an example app which was written/compiled in Eclipse, at least there doesn't seem to be a noticeable difference when the cursor is used to just move images across the screen.

Makio135

Re: mouseX/mouseY and surfaceTouchEvent

2 years ago

Hi,

I wanted to add elements in an ArrayList on touchSurfaceEvent() but was always displaying one step behind

in order not to be always one step behind, i tried Ben's method, but the apk was closing every time i had a touchSurfaceEvent.

it turned out that the only way to have my display work was by doing the classic mousePressed() which is working perfectly on my LG P500 Froyo // android processing 0191...

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