protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.Main);
Button button = FindViewById <Button> (Resource.Id.myButton);
FrameLayout mainFrameLayout = FindViewById <FrameLayout> (Resource.Id.Main_frameLayout);
customImageView = new ScalableImageView(this);
mainFrameLayout.AddView(customImageView, 0);
pageToast = Toast.MakeText(this, "", ToastLength.Short);
customImageView.OnFlingLeft += delegate {
ShowPageToast($"Left {++flingCount}");
};
customImageView.OnFlingRight += delegate {
ShowPageToast($"Right {++flingCount}");
};
customImageView.SetImageResource(Resource.Drawable.sample);
MemoryPressure();
}
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);
}
public ScaleListener(ScalableImageView imgView)
{
this.imgView = imgView;
}
