void InitDragGesture()
{
var menu = Element as SlideMenuView;
if (menu == null)
{
return;
}
if (ScreenSizeHelper.ScreenHeight == 0 && ScreenSizeHelper.ScreenWidth == 0)
{
ScreenSizeHelper.ScreenWidth = Resources.DisplayMetrics.WidthPixels / Resources.DisplayMetrics.Density;
ScreenSizeHelper.ScreenHeight = Resources.DisplayMetrics.HeightPixels / Resources.DisplayMetrics.Density;
}
_dragGesture = DragGestureFactory.GetGestureByView(menu, this.Resources.DisplayMetrics.Density);
_dragGesture.RequestLayout = (l, t, r, b, desity) => {
this.SetX((float)l);
this.SetY((float)t);
};
}
void LayoutMenu()
{
if (!CheckPageAndMenu())
{
return;
}
// areadly add gesture
if (_dragGesture != null)
{
return;
}
var menu = _basePage.SlideMenu;
_dragGesture = DragGestureFactory.GetGestureByView(menu);
_dragGesture.RequestLayout = (l, t, r, b, density) => {
_menuOverlayRenderer.NativeView.Frame = new CGRect(l, t, (r - l), (b - t));
_menuOverlayRenderer.NativeView.SetNeedsLayout();
};
_dragGesture.NeedShowBackgroundView = (open, alpha) => {
UIView.CommitAnimations();
if (open)
{
ShowBackgroundOverlay(alpha);
}
else
{
HideBackgroundOverlay();
}
};
_basePage.HideMenuAction = () => {
UIView.BeginAnimations("OpenAnimation");
UIView.SetAnimationDuration(((double)menu.AnimationDurationMillisecond) / 1000);
_dragGesture.LayoutHideStatus();
};
_basePage.ShowMenuAction = () => {
UIView.BeginAnimations("OpenAnimation");
UIView.SetAnimationDuration(((double)menu.AnimationDurationMillisecond) / 1000);
_dragGesture.LayoutShowStatus();
};
if (_menuOverlayRenderer == null)
{
_menuOverlayRenderer = Platform.CreateRenderer(menu);
Platform.SetRenderer(menu, _menuOverlayRenderer);
_panGesture = new UIPanGestureRecognizer(() => {
var p0 = _panGesture.LocationInView(_pageRenderer.View);
if (_panGesture.State == UIGestureRecognizerState.Began)
{
_dragGesture.DragBegin(p0.X, p0.Y);
}
else if (_panGesture.State == UIGestureRecognizerState.Changed &&
_panGesture.NumberOfTouches == 1)
{
_dragGesture.DragMoving(p0.X, p0.Y);
}
else if (_panGesture.State == UIGestureRecognizerState.Ended)
{
_dragGesture.DragFinished();
}
});
_menuOverlayRenderer.NativeView.AddGestureRecognizer(_panGesture);
}
var rect = _dragGesture.GetHidePosition();
menu.Layout(new Rectangle(
rect.left,
rect.top,
(rect.right - rect.left),
(rect.bottom - rect.top)));
_menuOverlayRenderer.NativeView.Hidden = !menu.IsVisible;
_menuOverlayRenderer.NativeView.Frame = new CGRect(
rect.left,
rect.top,
(rect.right - rect.left),
(rect.bottom - rect.top));
_menuOverlayRenderer.NativeView.SetNeedsLayout();
}
void LayoutMenu()
{
if (!CheckPageAndMenu())
{
return;
}
var menu = _basePage.SlideMenu;
_dragGesture = DragGestureFactory.GetGestureByView(menu);
_dragGesture.RequestLayout = (l, t, r, b, density) =>
{
menu.Layout(new Xamarin.Forms.Rectangle(
l,
t,
(r - l),
(b - t)));
Canvas.SetLeft(_popMenuOverlayRenderer, l);
Canvas.SetTop(_popMenuOverlayRenderer, t);
Canvas.SetZIndex(_popMenuOverlayRenderer, 254);
_popMenuOverlayRenderer.UpdateLayout();
_mainCanvas.UpdateLayout();
};
_dragGesture.NeedShowBackgroundView = (open, alpha) =>
{
if (open)
{
ShowBackgroundOverlay(alpha);
}
else
{
HideBackgroundOverlay();
}
};
_basePage.HideMenuAction = () =>
{
if (_dragGesture == null)
{
return;
}
_dragGesture.LayoutHideStatus();
// DoubleAnimation wasn't supported by UWP?
//DoubleAnimation dal = new DoubleAnimation();
//dal.From = Canvas.GetLeft(_popMenuOverlayRenderer);
//dal.To = rectp.left;
//dal.Duration = new Duration(TimeSpan.FromMilliseconds(menu.AnimationDurationMillisecond));
//DoubleAnimation dat = new DoubleAnimation();
//dat.From = Canvas.GetTop(_popMenuOverlayRenderer);
//dat.To = rectp.top;
//dat.Duration = new Duration(TimeSpan.FromMilliseconds(menu.AnimationDurationMillisecond));
//(_popMenuOverlayRenderer as UIElement).BeginAnimation(Canvas.LeftProperty, dal);
};
_basePage.ShowMenuAction = () =>
{
if (_dragGesture == null)
{
return;
}
_dragGesture.LayoutShowStatus();
};
if (_popMenuOverlayRenderer == null)
{
_popMenuOverlayRenderer = Platform.CreateRenderer(menu) as LayoutRenderer;
_popMenuOverlayRenderer.PointerPressed += menuOverlayRenderer_PointerPressed;
_popMenuOverlayRenderer.PointerMoved += menuOverlayRenderer_PointerMoved;
_popMenuOverlayRenderer.PointerReleased += menuOverlayRenderer_PointerReleased;
_popMenuOverlayRenderer.PointerExited += menuOverlayRenderer_PointerReleased;
}
var rect = _dragGesture.GetHidePosition();
menu.Layout(new Xamarin.Forms.Rectangle(
rect.left,
rect.top,
(rect.right - rect.left),
(rect.bottom - rect.top)));
Canvas.SetLeft(_popMenuOverlayRenderer, rect.left);
Canvas.SetTop(_popMenuOverlayRenderer, rect.top);
_popMenuOverlayRenderer.Visibility = menu.IsVisible ? Visibility.Visible : Visibility.Collapsed;
_popMenuOverlayRenderer.UpdateLayout();
}