// According to the event's position, change the focus to the first
// hitting cropping rectangle.
private void RecomputeFocus(MotionEvent e)
{
int count = this.MotionHighlightViews.Count;
for (int i = 0; i < count; i++)
{
EmHighlightView hv = this.MotionHighlightViews [i];
hv.Focused = false;
hv.Invalidate();
}
for (int i = 0; i < count; i++)
{
EmHighlightView hv = this.MotionHighlightViews [i];
int edge = hv.GetHit(e.GetX(), e.GetY());
if (edge != HighlightView.GrowNone)
{
if (!hv.Focused)
{
hv.Focused = true;
hv.Invalidate();
}
break;
}
}
this.Invalidate();
}
public override bool OnTouchEvent(MotionEvent e)
{
EmCropImage cropImage = (EmCropImage)this.Context;
if (cropImage.Saving)
{
return(false);
}
switch (e.Action)
{
case MotionEventActions.Down:
{
if (cropImage.WaitingToPick)
{
RecomputeFocus(e);
}
else
{
for (int i = 0; i < this.MotionHighlightViews.Count; i++)
{
EmHighlightView hv = this.MotionHighlightViews [i];
int edge = hv.GetHit(e.GetX(), e.GetY());
if (edge != HighlightView.GrowNone)
{
this.MotionEdge = edge;
this.MotionHighlightView = hv;
this.LastX = e.GetX();
this.LastY = e.GetY();
this.MotionHighlightView.SetMode(
(edge == EmHighlightView.MOVE)
? EmHighlightView.ModifyMode.Move
: EmHighlightView.ModifyMode.Grow);
break;
}
}
}
break;
}
case MotionEventActions.Up:
{
if (cropImage.WaitingToPick)
{
for (int i = 0; i < this.MotionHighlightViews.Count; i++)
{
EmHighlightView hv = this.MotionHighlightViews [i];
if (hv.Focused)
{
cropImage.MCrop = hv;
for (int j = 0; j < this.MotionHighlightViews.Count; j++)
{
if (j == i)
{
continue;
}
this.MotionHighlightViews [j].Hidden = true;
}
CenterBasedOnHighlightView(hv);
((EmCropImage)this.Context).WaitingToPick = false;
return(true);
}
}
}
else
{
if (this.MotionHighlightView != null)
{
CenterBasedOnHighlightView(this.MotionHighlightView);
this.MotionHighlightView.SetMode(EmHighlightView.ModifyMode.None);
}
}
this.MotionHighlightView = null;
break;
}
case MotionEventActions.Move:
{
if (cropImage.WaitingToPick)
{
RecomputeFocus(e);
}
else
{
if (this.MotionHighlightView != null)
{
this.MotionHighlightView.HandleMotion(this.MotionEdge,
e.GetX() - this.LastX,
e.GetY() - this.LastY);
this.LastX = e.GetX();
this.LastY = e.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(this.MotionHighlightView);
}
}
}
break;
}
}
switch (e.Action)
{
case MotionEventActions.Up:
{
this.Center(true, true);
break;
}
case MotionEventActions.Move:
{
if (this.GetScale() == 1f)
{
Center(true, true);
}
break;
}
}
return(true);
}