private static void OnMouseDown(object sender, MouseButtonEventArgs e)
{
PaintDotNet.UI.FrameworkElement visual = (PaintDotNet.UI.FrameworkElement)sender;
if (!visual.IsMouseCaptured)
{
PresentationSource source = PresentationSource.FromVisual(visual);
if ((source != null) && (source.PrimaryMouseDevice.Captured == null))
{
PointDouble position = e.GetPosition(visual);
visual.CaptureMouse();
visual.RaiseEvent(new MouseEventArgs(e.InputDevice, GestureBeginEvent, visual));
if (visual.IsMouseCaptured)
{
SetIsPressed(visual, true);
SetMouseCapturePoint(visual, position);
if (!GetAllowClick(visual))
{
SetIsDragging(visual, true);
visual.RaiseEvent(new MouseEventArgs(e.InputDevice, DragBeginEvent, visual));
}
}
else
{
visual.RaiseEvent(new MouseEventArgs(e.InputDevice, GestureEndEvent, visual));
}
e.Handled = true;
}
}
}
private static void IsEnabledPropertyChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
PaintDotNet.UI.FrameworkElement target = (PaintDotNet.UI.FrameworkElement)sender;
if (!((bool)e.NewValue))
{
target.RemoveHandler(UIElement.MouseDownEvent, new MouseButtonEventHandler(ClickDragBehavior.OnMouseDown));
target.RemoveHandler(UIElement.MouseMoveEvent, new MouseEventHandler(ClickDragBehavior.OnMouseMove));
target.RemoveHandler(UIElement.MouseUpEvent, new MouseButtonEventHandler(ClickDragBehavior.OnMouseUp));
target.RemoveHandler(UIElement.LostMouseCaptureEvent, new MouseEventHandler(ClickDragBehavior.OnLostMouseCapture));
target.RemoveHandler(UIElement.MouseLeaveEvent, new MouseEventHandler(ClickDragBehavior.OnMouseLeave));
SetIsDragging(target, false);
}
else
{
target.AddHandler(UIElement.MouseDownEvent, new MouseButtonEventHandler(ClickDragBehavior.OnMouseDown));
target.AddHandler(UIElement.MouseMoveEvent, new MouseEventHandler(ClickDragBehavior.OnMouseMove));
target.AddHandler(UIElement.MouseUpEvent, new MouseButtonEventHandler(ClickDragBehavior.OnMouseUp));
target.AddHandler(UIElement.LostMouseCaptureEvent, new MouseEventHandler(ClickDragBehavior.OnLostMouseCapture));
target.AddHandler(UIElement.MouseLeaveEvent, new MouseEventHandler(ClickDragBehavior.OnMouseLeave));
}
}
private static void OnMouseMove(object sender, MouseEventArgs e)
{
PaintDotNet.UI.FrameworkElement visual = (PaintDotNet.UI.FrameworkElement)sender;
if (visual.IsMouseCaptured)
{
CompositionTarget compositionTarget = PresentationSource.FromVisual(visual).CompositionTarget;
PointDouble position = e.GetPosition(visual);
bool flag = visual.HitTestLocal(position);
SetIsPressed(visual, flag);
if (GetIsDragging(visual))
{
visual.RaiseEvent(new MouseEventArgs(e.InputDevice, DragMoveEvent, visual));
}
else if (GetAllowDrag(visual))
{
VectorDouble num8;
PointDouble mouseCapturePoint = GetMouseCapturePoint(visual);
PointDouble pt = e.GetPosition(visual);
Matrix3x2Double matrixToDevice = compositionTarget.MatrixToDevice;
PointDouble num5 = matrixToDevice.Transform(mouseCapturePoint);
VectorDouble num7 = (VectorDouble)(matrixToDevice.Transform(pt) - num5);
if (GetAllowClick(visual))
{
num8 = new VectorDouble(PaintDotNet.UI.SystemParameters.MinimumHorizontalDragDistance, PaintDotNet.UI.SystemParameters.MinimumVerticalDragDistance);
}
else
{
num8 = new VectorDouble(0.0, 0.0);
}
if ((Math.Abs(num7.X) >= num8.X) || (Math.Abs(num7.Y) >= num8.Y))
{
SetIsDragging(visual, true);
visual.RaiseEvent(new MouseEventArgs(e.InputDevice, DragBeginEvent, visual));
}
}
e.Handled = true;
}
}
private static void OnMouseUp(object sender, MouseButtonEventArgs e)
{
PaintDotNet.UI.FrameworkElement target = (PaintDotNet.UI.FrameworkElement)sender;
if (target.IsMouseCaptured)
{
target.ReleaseMouseCapture();
if (GetIsDragging(target))
{
target.RaiseEvent(new MouseEventArgs(e.InputDevice, DragEndEvent, target));
}
else if (GetAllowClick(target))
{
PointDouble position = e.GetPosition(target);
if (target.HitTestLocal(position))
{
target.RaiseEvent(new MouseEventArgs(e.InputDevice, ClickedEvent, target));
}
}
SetIsDragging(target, false);
SetIsPressed(target, false);
target.RaiseEvent(new RoutedEventArgs(GestureEndEvent, target));
e.Handled = true;
}
}
public CenterElementTransform(PaintDotNet.UI.FrameworkElement target) : this()
{
this.Target = target;
}
private static void OnLostMouseCapture(object sender, MouseEventArgs e)
{
PaintDotNet.UI.FrameworkElement element = (PaintDotNet.UI.FrameworkElement)sender;
}
private static void IsPressedPropertyChanged(object sender, DependencyPropertyChangedEventArgs e)
{
PaintDotNet.UI.FrameworkElement source = (PaintDotNet.UI.FrameworkElement)sender;
source.RaiseEvent(new RoutedEventArgs(IsPressedChangedEvent, source));
}
private static PointDouble GetMouseCapturePoint(PaintDotNet.UI.FrameworkElement target) => ((PointDouble)target.GetValue(MouseCapturePointProperty));
public static bool GetIsPressed(PaintDotNet.UI.FrameworkElement target) => ((bool)target.GetValue(IsPressedProperty));
public static bool GetIsDragging(PaintDotNet.UI.FrameworkElement target) => ((bool)target.GetValue(IsDraggingProperty));
public static bool GetAllowDrag(PaintDotNet.UI.FrameworkElement target) => ((bool)target.GetValue(AllowDragProperty));
public static void AddIsPressedChangedHandler(PaintDotNet.UI.FrameworkElement target, RoutedEventHandler handler)
{
target.AddHandler(IsPressedChangedEvent, handler);
}
private static void SetMouseCapturePoint(PaintDotNet.UI.FrameworkElement target, PointDouble value)
{
target.SetValue(MouseCapturePointPropertyKey, value);
}
private static void SetIsPressed(PaintDotNet.UI.FrameworkElement target, bool value)
{
target.SetValue(IsPressedPropertyKey, BooleanUtil.GetBoxed(value));
}
public static void SetIsEnabled(PaintDotNet.UI.FrameworkElement target, bool value)
{
target.SetValue(IsEnabledProperty, BooleanUtil.GetBoxed(value));
}
public static void SetAllowDrag(PaintDotNet.UI.FrameworkElement target, bool value)
{
target.SetValue(AllowDragProperty, BooleanUtil.GetBoxed(value));
}
