void renderer_Touch(object sender, global::Android.Views.View.TouchEventArgs e)
{
VisualElementRenderer <global::Xamarin.Forms.View> renderer = sender as VisualElementRenderer <global::Xamarin.Forms.View>;
Element element = renderer.Element;
HandleTouch(element, e.Event);
e.Handled = true;
}
/// <summary>
/// Handles the touch.
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="Android.Views.View.TouchEventArgs"/> instance containing the event data.</param>
void HandleTouch(object sender, global::Android.Views.View.TouchEventArgs e)
{
var element = this.Element as ExtendedEntry;
switch (e.Event.Action)
{
case MotionEventActions.Down:
_downX = e.Event.GetX();
_downY = e.Event.GetY();
return;
case MotionEventActions.Up:
case MotionEventActions.Cancel:
case MotionEventActions.Move:
_upX = e.Event.GetX();
_upY = e.Event.GetY();
float deltaX = _downX - _upX;
float deltaY = _downY - _upY;
// swipe horizontal?
if (Math.Abs(deltaX) > Math.Abs(deltaY))
{
if (Math.Abs(deltaX) > MIN_DISTANCE)
{
// left or right
if (deltaX < 0)
{
element.OnRightSwipe(this, EventArgs.Empty); return;
}
if (deltaX > 0)
{
element.OnLeftSwipe(this, EventArgs.Empty); return;
}
}
else
{
global::Android.Util.Log.Info("ExtendedEntry", "Horizontal Swipe was only " + Math.Abs(deltaX) + " long, need at least " + MIN_DISTANCE);
return; // We don't consume the event
}
}
// swipe vertical?
// else
// {
// if(Math.abs(deltaY) > MIN_DISTANCE){
// // top or down
// if(deltaY < 0) { this.onDownSwipe(); return true; }
// if(deltaY > 0) { this.onUpSwipe(); return true; }
// }
// else {
// Log.i(logTag, "Vertical Swipe was only " + Math.abs(deltaX) + " long, need at least " + MIN_DISTANCE);
// return false; // We don't consume the event
// }
// }
return;
}
}
/*
* bool ShareMotionEvent(Element element, MotionEvent e, VisualElement eventElement) {
* if (element.Parent != null) {
* foreach (Listener listener in Listener.Listeners) {
* if (listener.Element == element.Parent) {
* NativeGestureHandler parentNativeGestureHandler = GetInstanceForElement (listener.Element);
*
* var parentEvent = MotionEvent.Obtain (e);
* Point offset = VisualElementExtensions.CoordTransform (eventElement, Point.Zero, listener.Element);
* var scale = Forms.Context.Resources.DisplayMetrics.Density;
* parentEvent.OffsetLocation ((float)(offset.X * scale), (float)(offset.Y * scale));
* if (_debugEvents) System.Diagnostics.Debug.WriteLine ("\t parentEvent=["+parentEvent+"]");
* return parentNativeGestureHandler.HandleMotionEvent (parentEvent);
* }
* }
* return ShareMotionEvent (element.Parent, e, eventElement);
* } else {
* return false;
* }
* }
*/
void HandleTouch(object sender, global::Android.Views.View.TouchEventArgs e)
{
//System.Diagnostics.Debug.WriteLine("NativeGestureHandler.HandlTouch");
var handled = HandleMotionEvent(e.Event);
if (e.Event.Action == MotionEventActions.Down)
{
e.Handled = true;
XamarinForms_2_4_WorkAround();
}
}
private void OnTouch(object sender, global::Android.Views.View.TouchEventArgs args)
{
TouchActionType?type = null;
if (args.Event.Action == MotionEventActions.Down)
{
_isPressed = true;
type = TouchActionType.Pressed;
}
else if (args.Event.Action == MotionEventActions.Up)
{
_isPressed = false;
type = TouchActionType.Released;
}
else if (args.Event.Action == MotionEventActions.Cancel)
{
_isPressed = false;
type = TouchActionType.Cancelled;
}
else if (args.Event.Action == MotionEventActions.Outside)
{
type = TouchActionType.Cancelled;
}
else if (args.Event.Action == MotionEventActions.Move)
{
type = TouchActionType.Move;
}
else if (args.Event.Action == MotionEventActions.Move && (args.Event.GetX() < 0 || args.Event.GetY() < 0 || args.Event.GetX() > _view.Width || args.Event.GetY() > _view.Height))
{
type = TouchActionType.Cancelled;
}
if (_touchEffect != null && type.HasValue)
{
Point point = PxToDp(new Point(args.Event.GetX(), args.Event.GetY()));
Point applicationPoint = PxToDp(new Point(args.Event.RawX, args.Event.RawY));
_touchEffect.OnTouchAction(Element, new TouchActionEventArgs(type.Value, point, applicationPoint, _isPressed));
}
}
void OnTouch(object sender, global::Android.Views.View.TouchEventArgs args)
{
// Two object common to all the events
global::Android.Views.View senderView = sender as global::Android.Views.View;
MotionEvent motionEvent = args.Event;
// Get the pointer index
int pointerIndex = motionEvent.ActionIndex;
// Get the id that identifies a finger over the course of its progress
int id = motionEvent.GetPointerId(pointerIndex);
senderView.GetLocationOnScreen(twoIntArray);
Point screenPointerCoords = new Point(twoIntArray[0] + motionEvent.GetX(pointerIndex),
twoIntArray[1] + motionEvent.GetY(pointerIndex));
// Use ActionMasked here rather than Action to reduce the number of possibilities
switch (args.Event.ActionMasked)
{
case MotionEventActions.Down:
case MotionEventActions.PointerDown:
FireEvent(this, id, TouchActionType.Pressed, screenPointerCoords, true);
idToEffectDictionary.Add(id, this);
capture = libTouchEffect.Capture;
break;
case MotionEventActions.Move:
// Multiple Move events are bundled, so handle them in a loop
for (pointerIndex = 0; pointerIndex < motionEvent.PointerCount; pointerIndex++)
{
id = motionEvent.GetPointerId(pointerIndex);
if (capture)
{
senderView.GetLocationOnScreen(twoIntArray);
screenPointerCoords = new Point(twoIntArray[0] + motionEvent.GetX(pointerIndex),
twoIntArray[1] + motionEvent.GetY(pointerIndex));
FireEvent(this, id, TouchActionType.Moved, screenPointerCoords, true);
}
else
{
CheckForBoundaryHop(id, screenPointerCoords);
if (idToEffectDictionary[id] != null)
{
FireEvent(idToEffectDictionary[id], id, TouchActionType.Moved, screenPointerCoords, true);
}
}
}
break;
case MotionEventActions.Up:
case MotionEventActions.Pointer1Up:
if (capture)
{
FireEvent(this, id, TouchActionType.Released, screenPointerCoords, false);
}
else
{
CheckForBoundaryHop(id, screenPointerCoords);
if (idToEffectDictionary[id] != null)
{
FireEvent(idToEffectDictionary[id], id, TouchActionType.Released, screenPointerCoords, false);
}
}
idToEffectDictionary.Remove(id);
break;
case MotionEventActions.Cancel:
if (capture)
{
FireEvent(this, id, TouchActionType.Cancelled, screenPointerCoords, false);
}
else
{
if (idToEffectDictionary[id] != null)
{
FireEvent(idToEffectDictionary[id], id, TouchActionType.Cancelled, screenPointerCoords, false);
}
}
idToEffectDictionary.Remove(id);
break;
}
}
