bool OnScale(ScaleGestureDetector detector)
{
float mScaleFactor = detector.ScaleFactor;
float origScale = imgView.saveScale;
imgView.saveScale *= mScaleFactor;
if (imgView.saveScale > imgView.maxScale)
{
imgView.saveScale = imgView.maxScale;
mScaleFactor = imgView.maxScale / origScale;
}
else if (imgView.saveScale < imgView.minScale)
{
imgView.saveScale = imgView.minScale;
mScaleFactor = imgView.minScale / origScale;
}
if (imgView.origWidth * imgView.saveScale <= imgView.viewWidth || imgView.origHeight * imgView.saveScale <= imgView.viewHeight)
{
imgView.matrix.PostScale(mScaleFactor, mScaleFactor, imgView.viewWidth / 2, imgView.viewHeight / 2);
}
else
{
imgView.matrix.PostScale(mScaleFactor, mScaleFactor, detector.FocusX, detector.FocusY);
}
imgView.fixTrans();
return(true);
}
public bool OnTouch(View v, MotionEvent evnt)
{
imgView = (ScalableImageView)v;
flingGestureDetector.OnTouchEvent(evnt);
mScaleDetector.OnTouchEvent(evnt);
PointF curr = new PointF(evnt.GetX(), evnt.GetY());
switch (evnt.Action)
{
case MotionEventActions.Down:
last.Set(curr);
start.Set(last);
currentState = State.DRAG;
//mode = TouchImageView.DRAG;
break;
case MotionEventActions.Move:
//if (mode == DRAG)
if (currentState == State.DRAG)
{
float deltaX = curr.X - last.X;
float deltaY = curr.Y - last.Y;
float fixTransX = imgView.getFixDragTrans(deltaX, imgView.viewWidth, imgView.origWidth * imgView.saveScale);
float fixTransY = imgView.getFixDragTrans(deltaY, imgView.viewHeight, imgView.origHeight * imgView.saveScale);
imgView.matrix.PostTranslate(fixTransX, fixTransY);
imgView.fixTrans();
last.Set(curr.X, curr.Y);
}
break;
case MotionEventActions.Up:
//mode = NONE;
currentState = State.NONE;
int xDiff = (int)Math.Abs(curr.X - start.X);
int yDiff = (int)Math.Abs(curr.Y - start.Y);
if (xDiff < CLICK && yDiff < CLICK)
{
PerformClick();
}
break;
case MotionEventActions.PointerUp:
//mode = NONE;
currentState = State.NONE;
break;
}
imgView.ImageMatrix = imgView.matrix;
Invalidate();
//return true; // indicate event was handled
return(false);
}