protected override void OnAttached()
{
base.OnAttached();
AssociatedObject.SizeChanged += AssociatedObject_SizeChanged;
#if alldbg || dbg
var win = WPFHelper.FindLogicalParent <Window>(AssociatedObject);
DesktopPanelTool.Lib.Debug.WriteLine($"win={win} name={win?.Name}");
#endif
}
public void Start(FrameworkElement target, string name = null, object parameters = null, EventHandler completed = null)
{
if (name == null)
{
throw new ArgumentNullException(nameof(name));
}
switch (name)
{
case DraggableFrameworkElementBehavior.CancelDragEffectAnimationName:
var previewImageCursorWindow = GetPreviewImageCursorWindow(target);
InitializeCancelDragStoryboard(previewImageCursorWindow);
_translateXAnim.From = previewImageCursorWindow.Left;
_translateXAnim.To = _initialLocation.X;
_translateYAnim.From = previewImageCursorWindow.Top;
_translateYAnim.To = _initialLocation.Y;
break;
case DraggableFrameworkElementBehavior.BeginDragEffectAnimationName:
InitializeBeginDragStoryBoard(target);
target.LayoutTransform = _beginScaleTransform;
_minWidthBackup = target.MinWidth;
_minHeightBackup = target.MinHeight;
target.MinWidth = target.MinHeight = 0d;
var stackPanel = WPFHelper.FindLogicalParent <StackPanel>(target);
if (stackPanel != null)
{
var idx = stackPanel.Children.IndexOf(target);
if (idx > -1)
{
_previousElement = stackPanel.Children[idx - 1];
_previousElement.Visibility = Visibility.Collapsed;
}
}
break;
case DraggableFrameworkElementBehavior.EndDragEffectAnimationName:
target.LayoutTransform = _endScaleTransform;
if (_previousElement != null) // temporary fix
{
_previousElement.Visibility = Visibility.Visible;
}
break;
}
var animation = GetAnimation(name);
if (completed != null)
{
animation.Completed += completed;
}
animation.Begin(target);
}
void InitializeBeginDragStoryBoard(FrameworkElement target)
{
Initialize(target);
_sourceWindow = WPFHelper.FindLogicalParent <Window>(target);
var rpos = target.TranslatePoint(new Point(0, 0), _sourceWindow);
_initialLocation = _sourceWindow.PointToScreen(rpos);
if (_beginDragStoryboard == null)
{
(_beginDragStoryboard, _beginScaleTransform) = InitStoryboard(DraggableFrameworkElementBehavior.BeginDragEffectAnimationName, target, 1, 1, 0.1, 0.1);
_beginDragStoryboard.Completed += (obj, e) =>
target.MaxWidth = target.MaxHeight = 0;
InitializeEndDragStoryboard(target);
}
}
internal static void DropWidget(WidgetControl widget, FrameworkElement target, DragEventArgs e)
{
var targetPanel = WPFHelper.FindLogicalParent <DesktopPanelBase>(target);
var sourcePanel = WPFHelper.FindLogicalParent <DesktopPanelBase>(widget);
var targetStack = WPFHelper.FindLogicalParent <StackPanel>(target);
var sourceStack = WPFHelper.FindLogicalParent <StackPanel>(widget);
if (targetPanel != null && sourcePanel != null && targetStack != null && sourceStack != null)
{
var dropAreaTarget = WPFHelper.FindLogicalParent <WidgetStackPanelDropPlaceHolder>(target);
var idxSourceStack = sourceStack.Children.IndexOf(widget);
var idxTargetStack = targetStack.Children.IndexOf(dropAreaTarget);
var targetIsLargeDropArea = dropAreaTarget.Name == "PermanentWidgetDropPlaceHolder";
#if alldbg || dbg
DesktopPanelTool.Lib.Debug.WriteLine($"--------------- drop: {widget.ViewModel.Title} ------------ before:");
DesktopPanelTool.Lib.Debug.WriteLine($"idxTargetStack={idxTargetStack} idxSourceStack={idxSourceStack}");
DesktopPanelTool.Lib.Debug.WriteLine($"sourcePanel==targetPanel:{sourcePanel==targetPanel} targetIsLargeDropArea={targetIsLargeDropArea} idxSourceStack==sourceStack.Children.Count-1:{idxSourceStack == sourceStack.Children.Count - 1}");
#endif
if (!((!targetIsLargeDropArea && sourcePanel == targetPanel && Math.Abs(idxTargetStack - idxSourceStack) == 1) ||
(targetIsLargeDropArea && sourcePanel == targetPanel && idxSourceStack == sourceStack.Children.Count - 1)
))
{
widget.ViewModel.PanelViewModel.CloseWidget(widget);
if (targetIsLargeDropArea)
{
targetPanel.ViewModel.AddWidget(widget);
}
else
{
if (idxTargetStack > idxSourceStack)
{
idxTargetStack -= 2;
}
targetPanel.ViewModel.AddWidget(widget, idxTargetStack);
}
widget.UpdateWidgetViewBindings(sourcePanel, targetPanel);
}
#if false && dbg
DesktopPanelTool.Lib.Debug.WriteLine($"--------------- after:");
widget.ViewModel.PanelViewModel.DumpWidgetsPanelChildren();
#endif
}
}
internal static void DropWidgetOnDesktop(WidgetControl widget, FrameworkElement target, DragEventArgs e)
{
var oldpanel = WPFHelper.FindLogicalParent <DesktopPanelBase>(widget);
widget.ViewModel.PanelViewModel.CloseWidget(widget);
var panel = AddDesktopPanel();
panel.ViewModel.Title = GetNewPanelDefaultTitle();
var p = new POINT();
GetCursorPos(ref p);
var gap = (Thickness)widget.FindResource("WindowShadowAreaSize");
var mind = (double)widget.FindResource("DropWidgetOnDesktopPanelMouseRelativeMinPosition");
var maxd = (double)widget.FindResource("DropWidgetOnDesktopPanelMouseRelativeMaxPosition");
panel.Left = p.X - gap.Left - maxd - widget.WidthBackup / 2d;
panel.Top = p.Y - gap.Top - mind - widget.HeightBackup / 2d;
panel.ViewModel.AddWidget(widget);
widget.UpdateWidgetViewBindings(oldpanel, panel);
panel.Show();
}