protected virtual void OnDragServiceDragOver(object sender, RadDragOverEventArgs e)
{
if (e.HitTarget is DraggableLayoutControlItem)
{
e.CanDrop = true;
LayoutControlContainerElement ancestor = ((DraggableLayoutControlItem)e.HitTarget).AssociatedItem.FindAncestor <LayoutControlContainerElement>();
LayoutControlDropTargetInfo dropTargetNode = ancestor.LayoutTree.GetDropTargetNode(e.HitTarget as DraggableLayoutControlItem, this.layoutControl.PointToClient(Control.MousePosition), this.GetDragContext(e.DragInstance));
dropTargetNode?.TargetBounds.Offset(ancestor.ControlBoundingRectangle.Location);
this.layoutControl.DragOverlay.SetPreviewRectangle(dropTargetNode != null ? dropTargetNode.TargetBounds : Rectangle.Empty);
}
else if (e.HitTarget is DraggableLayoutControlOverlayElement)
{
DraggableLayoutControlOverlayElement hitTarget = e.HitTarget as DraggableLayoutControlOverlayElement;
if (hitTarget.Parent is RootRadElement && hitTarget.Items.Count == 0)
{
e.CanDrop = true;
this.layoutControl.DragOverlay.SetPreviewRectangle(new Rectangle(Point.Empty, this.layoutControl.Size));
}
else
{
e.CanDrop = false;
}
}
else
{
e.CanDrop = false;
this.layoutControl.DragOverlay.SetPreviewRectangle(Rectangle.Empty);
}
}
public IEnumerable <DraggableLayoutControlItem> GetItems(
DraggableLayoutControlOverlayElement overlayElement)
{
overlayElement = overlayElement ?? this.overlayElement;
foreach (DraggableLayoutControlItem layoutControlItem1 in (RadItemCollection)overlayElement.Items)
{
yield return(layoutControlItem1);
if (layoutControlItem1.GroupContainer != null)
{
foreach (DraggableLayoutControlItem layoutControlItem2 in this.GetItems(layoutControlItem1.GroupContainer))
{
yield return(layoutControlItem2);
}
}
if (layoutControlItem1.ChildItem != null)
{
yield return(layoutControlItem1.ChildItem);
foreach (DraggableLayoutControlItem layoutControlItem2 in this.GetItems(layoutControlItem1.ChildItem.GroupContainer))
{
yield return(layoutControlItem2);
}
}
}
}
protected override void CreateChildItems(RadElement parent)
{
base.CreateChildItems(parent);
this.overlayElement = new DraggableLayoutControlOverlayElement();
this.overlayElement.AutoSize = false;
this.overlayElement.ShouldHandleMouseInput = true;
parent.Children.Add((RadElement)this.overlayElement);
}
private void InitializeChildContainer(LayoutControlGroupItem groupItem)
{
this.groupContainer = new DraggableLayoutControlOverlayElement();
if (groupItem.ContainerElement.Visibility != ElementVisibility.Visible)
{
return;
}
this.groupContainer.AutoSize = false;
this.groupContainer.Bounds = groupItem.ContainerElement.BoundingRectangle;
this.Children.Add((RadElement)this.groupContainer);
foreach (LayoutControlItemBase layoutControlItemBase in groupItem.Items)
{
this.groupContainer.Items.Add((RadItem) new DraggableLayoutControlItem()
{
AssociatedItem = layoutControlItemBase
});
}
}
protected virtual void OnDragServiceDragDrop(object sender, RadDropEventArgs e)
{
e.Handled = true;
this.layoutControl.DragOverlay.SetPreviewRectangle(Rectangle.Empty);
DraggableLayoutControlItem hitTarget1 = e.HitTarget as DraggableLayoutControlItem;
DraggableLayoutControlOverlayElement hitTarget2 = e.HitTarget as DraggableLayoutControlOverlayElement;
BaseListViewVisualItem dragInstance = e.DragInstance as BaseListViewVisualItem;
if (hitTarget2 != null)
{
this.HandleDropOnEmptyContainer(hitTarget2, dragInstance);
}
else
{
if (hitTarget1 == null)
{
return;
}
this.HandleItemDrop(dragInstance, hitTarget1);
}
}
protected virtual void HandleDropOnEmptyContainer(
DraggableLayoutControlOverlayElement overlayElement,
BaseListViewVisualItem draggedItem)
{
LayoutControlDraggableOverlay control = overlayElement.ElementTree.Control as LayoutControlDraggableOverlay;
LayoutControlItemBase layoutControlItemBase;
if (draggedItem.Data.Group == this.hiddenItemsGroup)
{
LayoutControlItemBase tag = draggedItem.Data.Tag as LayoutControlItemBase;
if (tag == null)
{
return;
}
this.layoutControl.HiddenItems.Remove((RadItem)tag);
layoutControlItemBase = tag;
}
else
{
layoutControlItemBase = this.CreateNewItem(draggedItem);
}
control.Owner.Items.Add((RadItem)layoutControlItemBase);
control.Owner.ContainerElement.RebuildLayoutTree();
}