private void OnDragInitialize(object sender, DragInitializeEventArgs e)
{
var draggedColumn = ((e.OriginalSource as RadListBoxItem) ?? (e.OriginalSource as FrameworkElement).ParentOfType<RadListBoxItem>()).DataContext as GridViewColumn;
var dragVisual = new DragVisual() { Content = draggedColumn.Header };
var payload = DragDropPayloadManager.GeneratePayload(null);
payload.SetData("DraggedColumn", draggedColumn);
e.DragVisual = dragVisual;
e.Data = payload;
e.AllowedEffects = DragDropEffects.All;
}
public FrameworkElement CreateDragVisual(DragVisualProviderState state)
{
var visual = new DragVisual();
var theme = StyleManager.GetTheme(state.Host);
if (theme != null)
{
StyleManager.SetTheme(visual, theme);
}
visual.Content = state.DraggedItems.OfType<object>().FirstOrDefault();
visual.ContentTemplate = this.DraggedItemTemplate;
return visual;
}
private void OnDragInitialize(object sender, DragInitializeEventArgs e)
{
var draggedColumn = ((e.OriginalSource as RadListBoxItem) ?? (e.OriginalSource as FrameworkElement).ParentOfType <RadListBoxItem>()).DataContext as GridViewColumn;
var dragVisual = new DragVisual()
{
Content = draggedColumn.Header
};
var payload = DragDropPayloadManager.GeneratePayload(null);
payload.SetData("DraggedColumn", draggedColumn);
e.DragVisual = dragVisual;
e.Data = payload;
e.AllowedEffects = DragDropEffects.All;
}
public FrameworkElement CreateDragVisual(DragVisualProviderState state)
{
var visual = new DragVisual();
var theme = StyleManager.GetTheme(state.Host);
if (theme != null)
{
StyleManager.SetTheme(visual, theme);
}
visual.Content = state.DraggedItems.OfType <object>().FirstOrDefault();
visual.ContentTemplate = this.DraggedItemTemplate;
return(visual);
}
private void AssociateObject_PreviewDragEnter(object sender, DragEventArgs e)
{
if (AssociatedObject.ItemTemplate != null)
{
if (_dragVisual == null)
{
FrameworkElement source = sender as FrameworkElement;
Point dragStart = DragManager.DragStartPosition;
FrameworkElement dragItem = GetItemContainerFromPoint(AssociatedObject, dragStart) as FrameworkElement;
Point itemPos = dragItem.TranslatePoint(new Point(), source);
Point position = e.GetPosition(source);
Point offset = new Point(dragStart.X - itemPos.X, dragStart.Y - itemPos.Y);
Size size = new Size(dragItem.ActualWidth, dragItem.ActualHeight);
IList data = DragDataManager.GetData(e.Data);
_dragVisual = new DragVisual(data, source, AssociatedObject.ItemTemplate, offset, size);
}
e.Handled = true;
}
}
private void AssociatedObject_PreviewDragLeave(object sender, DragEventArgs e)
{
_dragVisual.Destroy();
_dragVisual = null;
}
private void OnDragInitialize(object sender, DragInitializeEventArgs e)
{
var treeViewItem = e.OriginalSource as RadTreeViewItem ?? (e.OriginalSource as FrameworkElement).ParentOfType<RadTreeViewItem>();
var data = treeViewItem != null? treeViewItem.Item : (sender as RadTreeView).SelectedItem;
var payload = DragDropPayloadManager.GeneratePayload(null);
var dropDetails = new DropIndicationDetails();
dropDetails.CurrentDraggedItem = data;
DragVisual visual = new DragVisual()
{
Content = dropDetails,
ContentTemplate = data is CategoryViewModel ? this.AssociatedObject.Resources["CategoryDragTemplate"] as DataTemplate : this.AssociatedObject.Resources["ProductDragTemplate"] as DataTemplate
};
payload.SetData("DraggedData", data);
payload.SetData("DropDetails", dropDetails);
e.DragVisual = visual;
e.DragVisualOffset = e.RelativeStartPoint;
e.Data = payload;
e.AllowedEffects = DragDropEffects.All;
FrameworkElement sourceItem = e.OriginalSource as RadTreeViewItem ?? (e.OriginalSource as FrameworkElement).ParentOfType<RadTreeViewItem>();
if (sourceItem == null)
{
this.sourceItems = (IList)this.AssociatedObject.ItemsSource;
}
else
{
this.sourceItems = (sourceItem as RadTreeViewItem).ParentItem != null ? (IList)(sourceItem as RadTreeViewItem).ParentItem.ItemsSource : (IList)this.AssociatedObject.ItemsSource;
}
this.sourceItem = sourceItem.DataContext;
this.destinationItems = this.AssociatedObject.ItemsSource as IList;
this.isTreeSource = true;
}
