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Added DragDirectlySelectedOnly #120

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merged 1 commit into from
Jan 15, 2015
Merged

Added DragDirectlySelectedOnly #120

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1 change: 1 addition & 0 deletions Examples/DefaultsExample/Window(NET4).xaml
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Original file line number Diff line number Diff line change
Expand Up @@ -546,6 +546,7 @@
<TabItem Header="ListBox with Groups">
<ListBox ItemsSource="{Binding Source={StaticResource GroupedCollectionViewSource}}"
DisplayMemberPath="Caption"
dd:DragDrop.DragDirectlySelectedOnly="True"
dd:DragDrop.IsDragSource="True"
dd:DragDrop.IsDropTarget="True"
dd:DragDrop.DropHandler="{Binding}">
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13 changes: 13 additions & 0 deletions GongSolutions.Wpf.DragDrop/DragDrop.cs
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Expand Up @@ -267,6 +267,19 @@ public static void SetDragSourceIgnore(UIElement target, bool value)
target.SetValue(DragSourceIgnoreProperty, value);
}

public static readonly DependencyProperty DragDirectlySelectedOnlyProperty =
DependencyProperty.RegisterAttached("DragDirectlySelectedOnly", typeof(bool), typeof(DragDrop), new PropertyMetadata(false));

public static bool GetDragDirectlySelectedOnly(DependencyObject obj)
{
return (bool)obj.GetValue(DragDirectlySelectedOnlyProperty);
}

public static void SetDragDirectlySelectedOnly(DependencyObject obj, bool value)
{
obj.SetValue(DragDirectlySelectedOnlyProperty, value);
}

/// <summary>
/// DragMouseAnchorPoint defines the horizontal and vertical proportion at which the pointer will anchor on the DragAdorner.
/// </summary>
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6 changes: 5 additions & 1 deletion GongSolutions.Wpf.DragDrop/DragInfo.cs
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Expand Up @@ -52,8 +52,12 @@ public DragInfo(object sender, MouseButtonEventArgs e)
if (sourceItem != null) {
item = itemsControl.GetItemContainer(sourceItem);
}

if (item == null) {
item = itemsControl.GetItemContainerAt(e.GetPosition(itemsControl), itemsControl.GetItemsPanelOrientation());
if (DragDrop.GetDragDirectlySelectedOnly(VisualSource))
item = itemsControl.GetItemContainerAt(e.GetPosition(itemsControl));
else
item = itemsControl.GetItemContainerAt(e.GetPosition(itemsControl), itemsControl.GetItemsPanelOrientation());
}

if (item != null) {
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