protected override void ProcessDragDrop(Point dropLocation, ISupportDrag dragObject)
{
object dataContext = dragObject.GetDataContext();
RadPosition dropPosition = RadGridViewDragDropService.GetDropPosition(dropLocation, this.Size);
ColumnGroupsViewDefinition viewDefinition = this.ViewTemplate.ViewDefinition as ColumnGroupsViewDefinition;
if (viewDefinition != null)
{
if (dataContext is GridViewColumnGroup)
{
((GridViewColumnGroup)dataContext).IsVisible = true;
this.TableElement.UpdateLayout();
if (!this.ViewTemplate.AllowColumnReorder)
{
return;
}
this.DropColumnGroup(viewDefinition, (GridViewColumnGroup)dataContext, dropPosition);
return;
}
if (dataContext is GridViewDataColumn || dataContext is GridViewGroupColumn)
{
this.DropInColumnGroupsView(viewDefinition, dataContext as GridViewColumn, dropPosition);
return;
}
}
base.ProcessDragDrop(dropLocation, dragObject);
}
protected override void DropInColumnGroupsView(
ColumnGroupsViewDefinition view,
GridViewColumn column,
RadPosition dropPosition)
{
GridViewDataColumn gridViewDataColumn = column as GridViewDataColumn;
if (gridViewDataColumn != null)
{
if (this.ViewTemplate.AllowColumnReorder && this.GridViewGroupColumn.Group.Groups.Count == 0)
{
GridViewColumnGroupRow row = this.FindRow(view.ColumnGroups, (GridViewColumn)gridViewDataColumn);
if (this.GridViewGroupColumn.Group != null && this.GridViewGroupColumn.Group.Rows.Count == 0 && (dropPosition & RadPosition.Bottom) != RadPosition.None)
{
this.GridViewGroupColumn.Group.Rows.Add(new GridViewColumnGroupRow());
}
if (this.GridViewGroupColumn.Group != null && this.GridViewGroupColumn.Group.Rows.Count > 0)
{
if (row != null)
{
row.ColumnNames.Remove(gridViewDataColumn.Name);
if (row.ColumnNames.Count == 0)
{
this.FindGroup(view.ColumnGroups, row)?.Rows.Remove(row);
}
}
if ((dropPosition & RadPosition.Left) != RadPosition.None)
{
this.GridViewGroupColumn.Group.Rows[0].ColumnNames.Insert(0, gridViewDataColumn.Name);
}
else
{
this.GridViewGroupColumn.Group.Rows[0].ColumnNames.Add(gridViewDataColumn.Name);
}
}
}
if (!column.IsVisible && this.GridViewGroupColumn.Group.Groups.Count == 0)
{
column.IsVisible = true;
}
else
{
ColumnGroupRowLayout rowLayout = this.TableElement.ViewElement.RowLayout as ColumnGroupRowLayout;
rowLayout.InvalidateLayout();
rowLayout.InvalidateRenderColumns();
this.TableElement.ViewElement.UpdateRows(true);
}
}
else
{
if (!(column is GridViewGroupColumn))
{
return;
}
this.DropColumnGroup(view, ((GridViewGroupColumn)column).Group, dropPosition);
}
}
protected override void PerformStop()
{
SnapshotDragItem context = this.Context as SnapshotDragItem;
if (context != null)
{
context.Capture = false;
context.Item.IsMouseDown = false;
}
base.PerformStop();
this.DisposeDragHint();
this.dragDropBehavior = (IGridDragDropBehavior)null;
this.lastDropPosition = RadPosition.None;
}
private void DropColumnGroup(
ColumnGroupsViewDefinition view,
GridViewColumnGroup group,
RadPosition dropPosition)
{
ColumnGroupCollection groupCollection1 = this.FindGroupCollection(view, this.GridViewGroupColumn.Group);
ColumnGroupCollection groupCollection2 = this.FindGroupCollection(view, group);
int index = groupCollection1.IndexOf(this.GridViewGroupColumn.Group);
if (groupCollection1 == groupCollection2 && groupCollection2 != null && groupCollection2.IndexOf(group) < index)
{
--index;
}
if (group.Parent != null)
{
group.Parent.Groups.Remove(group);
}
else
{
view.ColumnGroups.Remove(group);
}
if ((dropPosition & RadPosition.Bottom) != RadPosition.None && this.GridViewGroupColumn.Group.Rows.Count == 0)
{
this.GridViewGroupColumn.Group.Groups.Add(group);
}
else if ((dropPosition & RadPosition.Left) != RadPosition.None)
{
groupCollection1.Insert(index, group);
}
else if (index < groupCollection1.Count - 1)
{
groupCollection1.Remove(group);
groupCollection1.Insert(index + 1, group);
}
else
{
groupCollection1.Add(group);
}
if (!group.IsVisible)
{
group.IsVisible = true;
}
ColumnGroupRowLayout rowLayout = this.TableElement.ViewElement.RowLayout as ColumnGroupRowLayout;
rowLayout.InvalidateLayout();
rowLayout.InvalidateRenderColumns();
this.TableElement.ViewElement.UpdateRows(true);
}
internal static RadPosition GetDropPosition(Point dropLocation, Size size)
{
RadPosition radPosition1 = RadPosition.None;
int num1 = size.Width / 2;
int num2 = size.Width / 3;
int num3 = 2 * size.Width / 3;
RadPosition radPosition2 = dropLocation.X > num1 ? radPosition1 | RadPosition.Right : radPosition1 | RadPosition.Left;
if (num2 < dropLocation.X && dropLocation.X < num3)
{
int num4 = size.Height / 2;
if (dropLocation.Y <= num4)
{
radPosition2 |= RadPosition.Top;
}
else
{
radPosition2 |= RadPosition.Bottom;
}
}
return(radPosition2);
}
protected override void HandleMouseMove(Point mousePosition)
{
ISupportDrop dropTarget = this.DropTarget;
this.AutoScroll();
base.HandleMouseMove(mousePosition);
RadElement radElement = dropTarget as RadElement;
RadPosition radPosition = RadPosition.None;
if (radElement != null)
{
radPosition = RadGridViewDragDropService.GetDropPosition(radElement.PointFromScreen(mousePosition), radElement.ControlBoundingRectangle.Size);
}
if (dropTarget != this.DropTarget || dropTarget == null || radPosition != this.lastDropPosition)
{
this.SetDragDropBehavior();
}
this.lastDropPosition = radPosition;
if (this.dragHintWindow == null)
{
return;
}
this.UpdateDragHintLocation(mousePosition);
}
