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);
}
}
private void dragDropService_PreviewDragOver(object sender, RadDragOverEventArgs e)
{
if (e.DragInstance is SnapshotDragItem)
{
e.CanDrop = e.HitTarget is GridDataRowElement || e.HitTarget is GridTableElement || e.HitTarget is GridSummaryRowElement;
}
}
protected override void OnPreviewDragOver(RadDragOverEventArgs e)
{
base.OnPreviewDragOver(e);
if (!e.CanDrop)
{
this.DisposeDragHint();
}
}
private void svc_PreviewDragOver(object sender, RadDragOverEventArgs e)
{
SnapshotDragItem dragged = e.DragInstance as SnapshotDragItem;
if (dragged != null && dragged.Item is GridHeaderCellElement)
{
e.CanDrop = e.HitTarget is GroupPanelElement;
}
}
private void DragDropService_PreviewDragOver(object sender, RadDragOverEventArgs e)
{
RadTextBoxElement textBox = e.HitTarget as RadTextBoxElement;
if (textBox == this.radTextBox1.TextBoxElement)
{
e.CanDrop = true;
}
}
protected override void OnPreviewDragOver(RadDragOverEventArgs e)
{
RadListVisualItem hitTarget = e.HitTarget as RadListVisualItem;
RadListElement radListElement = e.HitTarget as RadListElement;
if (hitTarget != null)
radListElement = hitTarget.Data.Owner;
e.CanDrop = radListElement.AllowDragDrop;
base.OnPreviewDragOver(e);
}
private void svc_PreviewDragOver(object sender, RadDragOverEventArgs e)
{
if (e.DragInstance is GridDataRowElement)
{
e.CanDrop = e.HitTarget is GridDataRowElement ||
e.HitTarget is GridTableElement ||
e.HitTarget is GridSummaryRowElement;
}
}
protected override void OnPreviewDragOver(RadDragOverEventArgs e)
{
base.OnPreviewDragOver(e);
if (this.dragDropBehavior != null)
{
return;
}
this.DisposeDragHint();
}
protected override void OnPreviewDragOver(RadDragOverEventArgs e)
{
GanttGraphicalViewBaseTaskElement context = this.Context as GanttGraphicalViewBaseTaskElement;
if (context != null)
{
e.CanDrop = context.Parent == e.HitTarget;
}
base.OnPreviewDragOver(e);
}
protected override void OnPreviewDragOver(RadDragOverEventArgs e)
{
base.OnPreviewDragOver(e);
StackLayoutElement dropTarget = e.HitTarget as StackLayoutElement;
TaskElement draggedObject = e.DragInstance as TaskElement;
if (draggedObject != null && dropTarget != null && dropTarget != draggedObject.Parent)
{
e.CanDrop = true;
}
}
protected override void OnPreviewDragOver(RadDragOverEventArgs e)
{
base.OnPreviewDragOver(e);
if (e.HitTarget is BaseListViewElement || e.HitTarget is BaseListViewVisualItem)
{
RadElement hitTarget = e.HitTarget as RadElement;
e.CanDrop = this.CanDropOnListView(hitTarget);
}
if (e.CanDrop)
{
return;
}
this.HideDragHint();
}
private void dragDropService_PreviewDragOver(object sender, RadDragOverEventArgs e)
{
dropHintWindow.Hide();
if (e.DragInstance is GridDataRowElement)
{
if (e.HitTarget is RadTreeViewElement)
{
e.CanDrop = true;
}
else if (e.HitTarget is TreeNodeElement)
{
e.CanDrop = true;
SetHintWindowPosition(MousePosition, (TreeNodeElement)e.HitTarget, e.DragInstance.GetDragHint());
}
}
}
protected override void OnPreviewDragOver(RadDragOverEventArgs e)
{
DetailListViewCellElement hitTarget = e.HitTarget as DetailListViewCellElement;
DetailListViewCellElement dragInstance = e.DragInstance as DetailListViewCellElement;
if (hitTarget != null && dragInstance != null)
{
ListViewDetailColumn data1 = hitTarget.Data;
ListViewDetailColumn data2 = dragInstance.Data;
if (data1 == null || data2 == null || data1.Owner != data2.Owner)
{
e.CanDrop = false;
}
}
base.OnPreviewDragOver(e);
if (e.CanDrop)
{
return;
}
this.DisposeDragHint();
}
protected override void OnPreviewDragOver(RadDragOverEventArgs e)
{
TreeNodeElement hitTarget1 = e.HitTarget as TreeNodeElement;
RadTreeViewElement hitTarget2 = e.HitTarget as RadTreeViewElement;
if (hitTarget2 != null)
{
e.CanDrop = hitTarget2.ElementTree.Control.AllowDrop && hitTarget2.Nodes.Count == 0 && this.IsInValidState(hitTarget2);
}
else if (hitTarget1 != null)
{
DropPosition dropPosition = this.GetDropPosition(this.DropLocation, hitTarget1);
e.CanDrop = this.CanDragOver(dropPosition, hitTarget1);
RadTreeViewDragCancelEventArgs e1 = new RadTreeViewDragCancelEventArgs(this.draggedNode, hitTarget1.Data);
e1.Cancel = !e.CanDrop;
e1.DropPosition = dropPosition;
this.owner.OnDragOverNode(e1);
e.CanDrop = !e1.Cancel;
}
base.OnPreviewDragOver(e);
}
protected override void OnPreviewDragOver(RadDragOverEventArgs e)
{
base.OnPreviewDragOver(e);
TreeNodeElement targetNodeElement = e.HitTarget as TreeNodeElement;
RadTreeViewElement treeView = e.HitTarget as RadTreeViewElement;
if (treeView != null)
{
e.CanDrop = treeView.ElementTree.Control.AllowDrop && treeView.Nodes.Count == 0 && this.IsInValidState(treeView);
}
else if (targetNodeElement != null)
{
DropPosition dropPosition = this.GetDropPosition(this.DropLocation, targetNodeElement);
e.CanDrop = this.CanDragOver(dropPosition, targetNodeElement);
RadTreeViewDragCancelEventArgs args = new RadTreeViewDragCancelEventArgs(draggedNode, targetNodeElement.Data);
args.Cancel = !e.CanDrop;
args.DropPosition = dropPosition;
this.owner.OnDragOverNode(args);
e.CanDrop = !args.Cancel;
}
}
/// <summary>
/// The drag drop service_ preview drag over.
/// </summary>
/// <param name="sender">
/// The sender.
/// </param>
/// <param name="e">
/// The e.
/// </param>
private void dragDropService_PreviewDragOver(object sender, RadDragOverEventArgs e)
{
if (e.DragInstance is GridDataRowElement)
{
e.CanDrop = e.HitTarget is GridDataCellElement || e.HitTarget is GridTableElement ||
e.HitTarget is GridSummaryCellElement;
}
}
protected override void OnPreviewDragOver(RadDragOverEventArgs e)
{
RadListElement hitTarget = e.HitTarget as RadListElement;
e.CanDrop = hitTarget != null && hitTarget.DataSource == null;
}
private void DragDropService_PreviewDragOver(object sender, RadDragOverEventArgs e)
{
}
