private void PresentMenuViewContainerWithMenuViewController(UIViewController menuViewController)
{
_menuViewContainer.Transform = CGAffineTransform.MakeIdentity();
if (ScaleBackgroundImageView)
{
_backgroundImageView.Transform = CGAffineTransform.MakeIdentity();
_backgroundImageView.Frame = View.Bounds;
}
_menuViewContainer.Frame = View.Bounds;
if (ScaleMenuView)
{
_menuViewContainer.Transform = MenuViewControllerTransformation;
}
_menuViewContainer.Alpha = !FadeMenuView ? 1 : 0;
if (ScaleBackgroundImageView)
{
_backgroundImageView.Transform = CGAffineTransform.MakeScale(1.7f, 1.7f);
}
WillShowMenuViewController?.Invoke(this, menuViewController);
}
private void PanGestureRecognized(UIPanGestureRecognizer recognizer)
{
DidRecognizePanGesture?.Invoke(this, recognizer);
if (!PanGestureEnabled)
{
return;
}
try
{
var point = recognizer.TranslationInView(View);
if (recognizer.State == UIGestureRecognizerState.Began)
{
UpdateContentViewShadow();
_originalPoint = new CGPoint(_contentViewContainer.Center.X - _contentViewContainer.Bounds.Width / 2.0,
_contentViewContainer.Center.Y - _contentViewContainer.Bounds.Height / 2.0);
_menuViewContainer.Transform = CGAffineTransform.MakeIdentity();
if (ScaleBackgroundImageView)
{
_backgroundImageView.Transform = CGAffineTransform.MakeIdentity();
_backgroundImageView.Frame = View.Bounds;
}
_menuViewContainer.Frame = View.Bounds;
AddContentButton();
View.Window.EndEditing(true);
_didNotifyDelegate = false;
}
if (recognizer.State == UIGestureRecognizerState.Changed)
{
nfloat delta = 0;
if (_visible)
{
delta = _originalPoint.X != 0 ? (point.X + _originalPoint.X) / _originalPoint.X : 0;
}
else
{
delta = point.X / View.Frame.Width;
}
delta = Math.Min(Math.Abs((float)delta), 1.6f);
var contentViewScale = ScaleContentView ? 1 - ((1 - ContentViewScaleValue) * delta) : 1;
var backgroundViewScale = 1.7f - (0.7f * delta);
var menuViewScale = 1.5f - (0.5f * delta);
if (!BouncesHorizontally)
{
contentViewScale = Math.Max((float)contentViewScale, ContentViewScaleValue);
backgroundViewScale = Math.Max((float)backgroundViewScale, 1.0f);
menuViewScale = Math.Max((float)menuViewScale, 1.0f);
}
_menuViewContainer.Alpha = !FadeMenuView ? 0 : delta;
_contentViewContainer.Alpha = 1 - (1 - ContentViewFadeOutAlpha) * delta;
if (ScaleBackgroundImageView)
{
_backgroundImageView.Transform = CGAffineTransform.MakeScale(backgroundViewScale, backgroundViewScale);
}
if (ScaleMenuView)
{
_menuViewContainer.Transform = CGAffineTransform.MakeScale(menuViewScale, menuViewScale);
}
if (ScaleBackgroundImageView)
{
if (backgroundViewScale < 1)
{
_backgroundImageView.Transform = CGAffineTransform.MakeIdentity();
}
}
if (!BouncesHorizontally && _visible)
{
if (_contentViewContainer.Frame.X > _contentViewContainer.Frame.Width / 2.0)
{
point.X = Math.Min(0.0f, (float)point.X);
}
if (_contentViewContainer.Frame.X < -(_contentViewContainer.Frame.Width / 2.0))
{
point.X = Math.Max(0.0f, (float)point.X);
}
}
// Limit size
//
if (point.X < 0)
{
point.X = Math.Max((float)point.X, (float)-UIScreen.MainScreen.Bounds.Height);
}
else
{
point.X = Math.Min((float)point.X, (float)UIScreen.MainScreen.Bounds.Height);
}
recognizer.SetTranslation(point, View);
if (!_didNotifyDelegate)
{
if (point.X > 0)
{
if (!_visible)
{
_menuState = MenuState.LeftOpening;
WillShowMenuViewController?.Invoke(this, LeftMenuViewController);
}
else
{
_menuState = MenuState.RightClosing;
}
}
if (point.X < 0)
{
if (!_visible)
{
_menuState = MenuState.RightOpening;
WillShowMenuViewController?.Invoke(this, RightMenuViewController);
}
else
{
_menuState = MenuState.LeftClosing;
}
}
_didNotifyDelegate = true;
}
if (contentViewScale > 1)
{
var oppositeScale = (1 - (contentViewScale - 1));
_contentViewContainer.Transform = CGAffineTransform.MakeScale(oppositeScale, oppositeScale);
_contentViewContainer.Transform = CGAffineTransform.Translate(_contentViewContainer.Transform, point.X, 0);
}
else
{
_contentViewContainer.Transform = CGAffineTransform.MakeScale(contentViewScale, contentViewScale);
_contentViewContainer.Transform = CGAffineTransform.Translate(_contentViewContainer.Transform, point.X, 0);
}
if (LeftMenuViewController != null)
{
LeftMenuViewController.View.Hidden = _contentViewContainer.Frame.X < 0;
}
if (RightMenuViewController != null)
{
RightMenuViewController.View.Hidden = _contentViewContainer.Frame.X > 0;
}
if (LeftMenuViewController == null && _contentViewContainer.Frame.X > 0)
{
_contentViewContainer.Transform = CGAffineTransform.MakeIdentity();
_contentViewContainer.Frame = View.Bounds;
_visible = false;
LeftMenuVisible = false;
}
else if (RightMenuViewController == null && _contentViewContainer.Frame.X < 0)
{
_contentViewContainer.Transform = CGAffineTransform.MakeIdentity();
_contentViewContainer.Frame = View.Bounds;
_visible = false;
RightMenuVisible = false;
}
StatusBarNeedsAppearanceUpdate();
}
if (recognizer.State == UIGestureRecognizerState.Ended)
{
_didNotifyDelegate = false;
if (PanMinimumOpenThreshold > 0 && (
(_contentViewContainer.Frame.X < 0 && _contentViewContainer.Frame.X > -((int)PanMinimumOpenThreshold)) ||
(_contentViewContainer.Frame.X > 0 && _contentViewContainer.Frame.X < PanMinimumOpenThreshold))
)
{
HideMenuViewController();
}
else if (_contentViewContainer.Frame.X == 0)
{
HideMenuViewControllerAnimated(false);
}
else
{
if (recognizer.VelocityInView(View).X > 0)
{
if (_contentViewContainer.Frame.X < 0)
{
HideMenuViewController();
}
else
{
if (LeftMenuViewController != null)
{
ShowLeftMenuViewController();
}
}
}
else
{
if (_contentViewContainer.Frame.X < 20)
{
if (RightMenuViewController != null)
{
ShowRightMenuViewController();
}
}
else
{
HideMenuViewController();
}
}
}
}
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("Exception :" + e);
System.Diagnostics.Debug.WriteLine("Stacktrace :" + e.StackTrace);
}
}