public override Point GetDragHintLocation(ISupportDrop dropTarget, Point mousePosition)
{
GridHeaderCellElement headerCellElement = dropTarget as GridHeaderCellElement;
Rectangle boundingRectangle1 = headerCellElement.ControlBoundingRectangle;
Rectangle boundingRectangle2 = headerCellElement.RowElement.TableElement.ViewElement.ControlBoundingRectangle;
if (boundingRectangle1.Right > boundingRectangle2.Right)
{
boundingRectangle1.Width -= boundingRectangle1.Right - boundingRectangle2.Right;
}
if (boundingRectangle1.X < boundingRectangle2.X)
{
boundingRectangle1.Width -= boundingRectangle2.X - boundingRectangle1.X;
boundingRectangle1.X = boundingRectangle2.X;
}
Rectangle screen = this.GridViewElement.ElementTree.Control.RectangleToScreen(boundingRectangle1);
Size size = Size.Empty;
if (this.DragHint.Image != null)
{
size = this.DragHint.Image.Size;
}
Padding margins = this.DragHint.Margins;
Point dropLocation = headerCellElement.PointFromScreen(mousePosition);
if (this.orientation == Orientation.Vertical)
{
return(new Point((RadGridViewDragDropService.IsDroppedAtLeft(dropLocation, headerCellElement.Size.Width) ? screen.X : screen.Right) - size.Width / 2, screen.Y - margins.Top));
}
return(new Point(screen.X - margins.Left, screen.Bottom - margins.Top - size.Height / 2));
}
protected override void ProcessColumnDrop(Point dropLocation, GridViewColumn column)
{
if (TemplateGroupsElement.RaiseGroupByChanging(this.TemplateElement.ViewTemplate, this.Description, NotifyCollectionChangedAction.ItemChanged))
{
return;
}
RadGridViewDragDropService.InsertOnLeftOrRight <SortDescriptor>(RadGridViewDragDropService.IsDroppedAtLeft(dropLocation, this.Size.Width), (Collection <SortDescriptor>) this.Description.GroupNames, this.sortDescription, new SortDescriptor(column.Name, ListSortDirection.Ascending));
TemplateGroupsElement.RaiseGroupByChanged(this.TemplateElement.ViewTemplate, this.Description, NotifyCollectionChangedAction.ItemChanged);
}
protected virtual void ProcessColumnDrop(Point dropLocation, GridViewColumn column)
{
GroupDescriptor groupDescriptor = new GroupDescriptor();
groupDescriptor.GroupNames.Add(new SortDescriptor(column.Name, ListSortDirection.Ascending));
if (TemplateGroupsElement.RaiseGroupByChanging(this.templateElement.ViewTemplate, groupDescriptor, NotifyCollectionChangedAction.Add))
{
return;
}
RadGridViewDragDropService.InsertOnLeftOrRight <GroupDescriptor>(RadGridViewDragDropService.IsDroppedAtLeft(dropLocation, this.Size.Width), (Collection <GroupDescriptor>) this.description.Owner, this.description, groupDescriptor);
TemplateGroupsElement.RaiseGroupByChanged(this.templateElement.ViewTemplate, groupDescriptor, NotifyCollectionChangedAction.Add);
}
private void ProcessGroupFieldDrop(Point dropLocation, GroupFieldDragDropContext context)
{
SortDescriptor sortDescription = context.SortDescription;
GridViewTemplate viewTemplate = context.ViewTemplate;
GroupDescriptor groupDescription = context.GroupDescription;
if (TemplateGroupsElement.RaiseGroupByChanging(viewTemplate, groupDescription, NotifyCollectionChangedAction.Batch) || this.ProcessGroupFieldDropOverride(dropLocation, context))
{
return;
}
groupDescription.GroupNames.Remove(sortDescription);
GroupDescriptor groupDescriptor = new GroupDescriptor();
groupDescriptor.GroupNames.Add(sortDescription);
RadGridViewDragDropService.InsertOnLeftOrRight <GroupDescriptor>(RadGridViewDragDropService.IsDroppedAtLeft(dropLocation, this.Size.Width), (Collection <GroupDescriptor>) this.description.Owner, this.description, groupDescriptor);
if (groupDescription.GroupNames.Count == 0)
{
viewTemplate.DataView.GroupDescriptors.Remove(groupDescription);
}
TemplateGroupsElement.RaiseGroupByChanged(viewTemplate, groupDescriptor, NotifyCollectionChangedAction.Batch);
}
protected override bool ProcessGroupFieldDropOverride(
Point dropLocation,
GroupFieldDragDropContext context)
{
SortDescriptor sortDescription = context.SortDescription;
GridViewTemplate viewTemplate = context.ViewTemplate;
GroupDescriptor groupDescription = context.GroupDescription;
groupDescription.GroupNames.Remove(sortDescription);
if (RadGridViewDragDropService.IsDroppedAtLeft(dropLocation, this.Size.Width))
{
this.Description.GroupNames.Insert(0, sortDescription);
}
else
{
this.Description.GroupNames.Add(sortDescription);
}
if (groupDescription.GroupNames.Count == 0)
{
viewTemplate.DataView.GroupDescriptors.Remove(groupDescription);
}
TemplateGroupsElement.RaiseGroupByChanged(context.ViewTemplate, context.GroupDescription, NotifyCollectionChangedAction.Batch);
return(true);
}
protected override bool ProcessGroupFieldDropOverride(
Point dropLocation,
GroupFieldDragDropContext context)
{
bool isDroppedAtLeft = RadGridViewDragDropService.IsDroppedAtLeft(dropLocation, this.Size.Width);
if (this.Description != context.GroupDescription)
{
SortDescriptor sortDescription = context.SortDescription;
GridViewTemplate viewTemplate = context.ViewTemplate;
context.GroupDescription.GroupNames.Remove(sortDescription);
if (context.GroupDescription.GroupNames.Count == 0)
{
viewTemplate.DataView.GroupDescriptors.Remove(context.GroupDescription);
}
RadGridViewDragDropService.InsertOnLeftOrRight <SortDescriptor>(isDroppedAtLeft, (Collection <SortDescriptor>) this.Description.GroupNames, this.sortDescription, sortDescription);
}
else
{
RadGridViewDragDropService.MoveOnLeftOrRight <SortDescriptor>(isDroppedAtLeft, (Collection <SortDescriptor>) this.Description.GroupNames, this.sortDescription, context.SortDescription);
}
TemplateGroupsElement.RaiseGroupByChanged(context.ViewTemplate, context.GroupDescription, NotifyCollectionChangedAction.Batch);
return(true);
}