/// <inheritdoc />
protected override void OnMouseUp(MouseButtonEventArgs e)
{
// We have to release the mouse first, in case Validate triggers a Detach of this behavior.
ReleaseMouseCapture();
if (dragState == DragState.Starting)
{
AssociatedObject.Select(0, AssociatedObject.Text.Length);
if (!AssociatedObject.IsFocused)
{
Keyboard.Focus(AssociatedObject);
}
}
else if (dragState == DragState.Dragging && AssociatedObject.AllowMouseDrag)
{
if (adorner != null)
{
var adornerLayer = AdornerLayer.GetAdornerLayer(AssociatedObject);
if (adornerLayer != null)
{
adornerLayer.Remove(adorner);
adorner = null;
}
}
AssociatedObject.Validate();
}
e.Handled = true;
Mouse.OverrideCursor = null;
dragState = DragState.None;
}
/// <inheritdoc/>
protected override void OnPreviewMouseDown(MouseButtonEventArgs e)
{
base.OnPreviewMouseDown(e);
if (!IsContentHostPart(e.OriginalSource))
{
return;
}
if (AllowMouseDrag && IsReadOnly == false && IsFocused == false)
{
dragState = DragState.Starting;
if (adorner == null)
{
adorner = new DragDirectionAdorner(this, contentHost.ActualWidth);
var adornerLayer = AdornerLayer.GetAdornerLayer(this);
if (adornerLayer != null)
{
adornerLayer.Add(adorner);
}
}
mouseDownPosition = e.GetPosition(this);
Mouse.OverrideCursor = Cursors.None;
e.Handled = true;
}
}
/// <inheritdoc />
protected override void OnMouseDown(MouseButtonEventArgs e)
{
if (!IsContentHostPart(e.OriginalSource))
{
return;
}
if (!AssociatedObject.AllowMouseDrag || AssociatedObject.IsReadOnly || AssociatedObject.IsFocused)
{
return;
}
e.Handled = true;
CaptureMouse();
dragState = DragState.Starting;
Mouse.OverrideCursor = Cursors.None;
mouseDownPosition = e.GetPosition(AssociatedObject);
if (adorner == null)
{
adorner = new DragDirectionAdorner(AssociatedObject, AssociatedObject.contentHost.ActualWidth);
var adornerLayer = AdornerLayer.GetAdornerLayer(AssociatedObject);
adornerLayer?.Add(adorner);
}
}
/// <inheritdoc/>
protected override void OnPreviewMouseUp(MouseButtonEventArgs e)
{
base.OnPreviewMouseUp(e);
if (ReferenceEquals(e.MouseDevice.Captured, this))
{
e.MouseDevice.Capture(null);
}
if (dragState == DragState.Starting)
{
Select(0, Text.Length);
if (!IsFocused)
{
Keyboard.Focus(this);
}
}
else if (dragState == DragState.Dragging && AllowMouseDrag)
{
if (adorner != null)
{
var adornerLayer = AdornerLayer.GetAdornerLayer(this);
if (adornerLayer != null)
{
adornerLayer.Remove(adorner);
adorner = null;
}
}
Validate();
}
Mouse.OverrideCursor = null;
dragState = DragState.None;
}
/// <inheritdoc/>
protected override void OnPreviewMouseUp(MouseButtonEventArgs e)
{
base.OnPreviewMouseUp(e);
if (ReferenceEquals(e.MouseDevice.Captured, this))
{
e.MouseDevice.Capture(null);
}
if (dragState == DragState.Starting)
{
Select(0, Text.Length);
if (!IsFocused)
{
Keyboard.Focus(this);
}
}
else if (dragState == DragState.Dragging && AllowMouseDrag)
{
if (adorner != null)
{
var adornerLayer = AdornerLayer.GetAdornerLayer(this);
if (adornerLayer != null)
{
adornerLayer.Remove(adorner);
adorner = null;
}
}
Validate();
var handler = DragCompleted;
if (handler != null)
{
Point position = e.GetPosition(this);
double dx = Math.Abs(position.X - mouseDownPosition.X);
double dy = Math.Abs(position.Y - mouseDownPosition.Y);
handler(this, new DragCompletedEventArgs(dx, dy, false));
}
}
Mouse.OverrideCursor = null;
dragState = DragState.None;
}
private void RootParentIsKeyboardFocusWithinChanged(object sender, DependencyPropertyChangedEventArgs args)
{
if ((bool)args.NewValue == false)
{
// Cancel dragging in progress
if (dragState == DragState.Dragging)
{
if (adorner != null)
{
var adornerLayer = AdornerLayer.GetAdornerLayer(this);
if (adornerLayer != null)
{
adornerLayer.Remove(adorner);
adorner = null;
}
}
Cancel();
var handler = DragCompleted;
if (handler != null)
{
Point position = Mouse.GetPosition(this);
double dx = Math.Abs(position.X - mouseDownPosition.X);
double dy = Math.Abs(position.Y - mouseDownPosition.Y);
handler(this, new DragCompletedEventArgs(dx, dy, true));
}
Mouse.OverrideCursor = null;
dragState = DragState.None;
}
var root = this.FindVisualRoot() as FrameworkElement;
if (root != null)
{
root.IsKeyboardFocusWithinChanged -= RootParentIsKeyboardFocusWithinChanged;
}
}
}
private void RootParentIsKeyboardFocusWithinChanged(object sender, DependencyPropertyChangedEventArgs args)
{
if ((bool)args.NewValue)
{
return;
}
// Cancel dragging in progress
if (dragState == DragState.Dragging)
{
if (adorner != null)
{
var adornerLayer = AdornerLayer.GetAdornerLayer(AssociatedObject);
if (adornerLayer != null)
{
adornerLayer.Remove(adorner);
adorner = null;
}
}
AssociatedObject.Cancel();
}
Cancel();
}
/// <inheritdoc/>
protected override void OnPreviewMouseUp(MouseButtonEventArgs e)
{
base.OnPreviewMouseUp(e);
if (ReferenceEquals(e.MouseDevice.Captured, this))
e.MouseDevice.Capture(null);
if (dragState == DragState.Starting)
{
Select(0, Text.Length);
if (!IsFocused)
{
Keyboard.Focus(this);
}
}
else if (dragState == DragState.Dragging && AllowMouseDrag)
{
if (adorner != null)
{
var adornerLayer = AdornerLayer.GetAdornerLayer(this);
if (adornerLayer != null)
{
adornerLayer.Remove(adorner);
adorner = null;
}
}
Validate();
var handler = DragCompleted;
if (handler != null)
{
Point position = e.GetPosition(this);
double dx = Math.Abs(position.X - mouseDownPosition.X);
double dy = Math.Abs(position.Y - mouseDownPosition.Y);
handler(this, new DragCompletedEventArgs(dx, dy, false));
}
}
Mouse.OverrideCursor = null;
dragState = DragState.None;
}
/// <inheritdoc/>
protected override void OnPreviewMouseDown(MouseButtonEventArgs e)
{
base.OnPreviewMouseDown(e);
if (!IsContentHostPart(e.OriginalSource))
return;
if (AllowMouseDrag && IsReadOnly == false && IsFocused == false)
{
dragState = DragState.Starting;
if (adorner == null)
{
adorner = new DragDirectionAdorner(this, contentHost.ActualWidth);
var adornerLayer = AdornerLayer.GetAdornerLayer(this);
if (adornerLayer != null)
adornerLayer.Add(adorner);
}
mouseDownPosition = e.GetPosition(this);
Mouse.OverrideCursor = Cursors.None;
e.Handled = true;
}
}
private void RootParentIsKeyboardFocusWithinChanged(object sender, DependencyPropertyChangedEventArgs args)
{
if ((bool)args.NewValue == false)
{
// Cancel dragging in progress
if (dragState == DragState.Dragging)
{
if (adorner != null)
{
var adornerLayer = AdornerLayer.GetAdornerLayer(this);
if (adornerLayer != null)
{
adornerLayer.Remove(adorner);
adorner = null;
}
}
Cancel();
var handler = DragCompleted;
if (handler != null)
{
Point position = Mouse.GetPosition(this);
double dx = Math.Abs(position.X - mouseDownPosition.X);
double dy = Math.Abs(position.Y - mouseDownPosition.Y);
handler(this, new DragCompletedEventArgs(dx, dy, true));
}
Mouse.OverrideCursor = null;
dragState = DragState.None;
}
var root = this.FindVisualRoot() as FrameworkElement;
if (root != null)
root.IsKeyboardFocusWithinChanged -= RootParentIsKeyboardFocusWithinChanged;
}
}
