public bool OnTouch(View v, MotionEvent ev)
{
bool handled = false;
if (mZoomEnabled && HasDrawable((ImageView)v))
{
IViewParent parent = v.Parent;
switch (ev.Action)
{
case MotionEventActions.Down:
// First, disable the Parent from intercepting the touch
// event
if (null != parent)
{
parent.RequestDisallowInterceptTouchEvent(true);
}
else
{
Log.Info(LOG_TAG, "onTouch getParent() returned null");
}
// If we're flinging, and the user presses down, cancel
// fling
CancelFling();
break;
case MotionEventActions.Cancel:
case MotionEventActions.Up:
// If the user has zoomed less than min scale, zoom back
// to min scale
if (GetScale() < mMinScale)
{
RectF rect = GetDisplayRect();
if (null != rect)
{
v.Post(new AnimatedZoomRunnable(this, GetScale(), mMinScale,
rect.CenterX(), rect.CenterY()));
handled = true;
}
}
break;
}
// Try the Scale/Drag detector
if (null != mScaleDragDetector &&
mScaleDragDetector.OnTouchEvent(ev))
{
handled = true;
}
// Check to see if the user double tapped
if (null != mGestureDetector && mGestureDetector.OnTouchEvent(ev))
{
handled = true;
}
}
return(handled);
}
private void DisableParentTouch(IViewParent view)
{
view.RequestDisallowInterceptTouchEvent(true);
if (view.Parent != null)
{
DisableParentTouch((view.Parent));
}
}
private void AttemptClaimDrag()
{
IViewParent parent = Parent;
if (parent != null)
{
parent.RequestDisallowInterceptTouchEvent(true);
}
}
public void OnDrag(float dx, float dy)
{
if (mScaleDragDetector.IsScaling())
{
return; // Do not drag if we are already scaling
}
if (DEBUG)
{
LogManager.GetLogger().d(LOG_TAG,
Java.Lang.String.Format("onDrag: dx: %.2f. dy: %.2f", dx, dy));
}
ImageView imageView = GetImageView();
mSuppMatrix.PostTranslate(dx, dy);
CheckAndDisplayMatrix();
IViewParent parent = imageView.Parent;
if (mAllowParentInterceptOnEdge && !mScaleDragDetector.IsScaling())
{
if (mScrollEdge == EDGE_BOTH ||
(mScrollEdge == EDGE_LEFT && dx >= 1f) ||
(mScrollEdge == EDGE_RIGHT && dx <= -1f))
{
if (null != parent)
{
parent.RequestDisallowInterceptTouchEvent(false);
}
}
}
else
{
if (null != parent)
{
parent.RequestDisallowInterceptTouchEvent(true);
}
}
}
public bool OnTouch(Android.Views.View v, MotionEvent e)
{
try {
IViewParent parent = null;
if (v.Parent is Android.Views.View)
{
parent = v.Parent;
}
while (parent != null || parent is Android.Widget.ListView)
{
parent.RequestDisallowInterceptTouchEvent(true);
parent = (parent is Android.Views.View viewParent) ? viewParent.Parent : null;
}
}
catch (Exception exc) {
}
return(false);
}