Get Canvas coordinates after scaling up/down or dragging in android

Question

I\'m developing an application in which I\'m pasting images, doing drawing and painting on canvas. This app can also Scale up/down the canvas or drag it to different locatio

Answer 1

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    clipBounds_canvas = canvas.getClipBounds();
    /////Do whatever you want to do..!!!            
};

@Override
public boolean onTouchEvent(MotionEvent ev) {
    int x = ev.getX() / zoomFactor + clipBounds_canvas.left;
    int y = ev.getY() / zoomFactor + clipBounds_canvas.top;
    //Use the above two values insted of ev.getX() and ev.getY();
}

Hope this will help.

Answer 2

Done it finally by myself.

Draw everything by applying this formula to (px,py) coordinates:

float px = ev.getX() / mScaleFactor + rect.left;
float py = ev.getY() / mScaleFactor + rect.top;
rect = canvas.getClipBounds();
//Get them in on Draw function and apply above formula before drawing