private static Bitmap GetAsBitmapSnapshot(
DraggableLayoutControlItem draggableItem,
Point offset,
Size size)
{
RadElement associatedItem = (RadElement)draggableItem.AssociatedItem;
if (associatedItem.ElementState != ElementState.Loaded)
{
return((Bitmap)null);
}
if (size.Width <= 0 || size.Height <= 0)
{
return((Bitmap)null);
}
LayoutControlDraggableOverlay control = draggableItem.ElementTree.Control as LayoutControlDraggableOverlay;
if (control == null)
{
return((Bitmap)null);
}
Bitmap cachedSnapshot = control.CachedSnapshot;
Bitmap bitmap = new Bitmap(size.Width, size.Height);
using (Graphics graphics = Graphics.FromImage((Image)bitmap))
{
Rectangle boundingRectangle = associatedItem.ControlBoundingRectangle;
boundingRectangle.Offset(offset);
boundingRectangle.Size = size;
graphics.DrawImage((Image)cachedSnapshot, new Rectangle(Point.Empty, size), boundingRectangle, GraphicsUnit.Pixel);
}
return(bitmap);
}
public LayoutControlDragDropService(
RadLayoutControl owner,
LayoutControlDraggableOverlay overlay)
{
this.owner = owner;
this.overlay = overlay;
try
{
Bitmap bitmap = new Bitmap(typeof(LayoutControlDragDropService).Assembly.GetManifestResourceStream("Telerik.WinControls.UI.RadLayoutControl.Editing.Remove.png"));
this.deleteCursor = new Cursor(bitmap.GetHicon());
bitmap.Dispose();
}
catch
{
}
}
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();
}
