public override bool OnTouchEvent(MotionEvent ev)
{
if (saving)
return false;
_scaleDetector.OnTouchEvent(ev);
switch (ev.Action)
{
case MotionEventActions.Down:
for (int i = 0; i < hightlightViews.Count; i++)
{
HighlightView hv = hightlightViews[i];
var edge = hv.GetHit(ev.GetX(), ev.GetY());
if (edge != global::Plugin.ImageCrop.HighlightView.HitPosition.None)
{
motionEdge = edge;
mMotionHighlightView = hv;
mLastX = ev.GetX();
mLastY = ev.GetY();
mMotionHighlightView.Mode =
(edge == global::Plugin.ImageCrop.HighlightView.HitPosition.Move)
? HighlightView.ModifyMode.Move
: HighlightView.ModifyMode.Grow;
break;
}
}
break;
case MotionEventActions.Up:
if (mMotionHighlightView != null)
{
centerBasedOnHighlightView(mMotionHighlightView);
mMotionHighlightView.Mode = HighlightView.ModifyMode.None;
}
mMotionHighlightView = null;
isScaling = false;
break;
case MotionEventActions.Move:
if (!isScaling && mMotionHighlightView != null)
{
mMotionHighlightView.HandleMotion(motionEdge,
ev.GetX() - mLastX,
ev.GetY() - mLastY);
mLastX = ev.GetX();
mLastY = ev.GetY();
if (true)
{
// This section of code is optional. It has some user
// benefit in that moving the crop rectangle against
// the edge of the screen causes scrolling but it means
// that the crop rectangle is no longer fixed under
// the user's finger.
ensureVisible(mMotionHighlightView);
}
}
break;
}
switch (ev.Action)
{
case MotionEventActions.Up:
Center(true, true);
break;
case MotionEventActions.Move:
// if we're not zoomed then there's no point in even allowing
// the user to move the image around. This call to center puts
// it back to the normalized location (with false meaning don't
// animate).
if (GetScale() == 1F)
{
Center(true, true);
}
break;
}
return true;
}
