/// <summary>
/// Create a data object that will be used to as the data object
/// for the drag operation.
/// </summary>
/// <remarks>
/// Subclasses can override this method add new formats to the data object.
/// </remarks>
/// <param name="olv">The ObjectListView that is the source of the drag</param>
/// <returns>A data object for the drag</returns>
protected virtual object CreateDataObject(ObjectListView olv)
{
OLVDataObject data = new OLVDataObject(olv);
data.CreateTextFormats();
return(data);
}
/// <summary>
/// A drag has entered this control.
/// </summary>
/// <remarks>Implementators should set args.Effect to the appropriate DragDropEffects.</remarks>
/// <param name="args"></param>
public override void Enter(DragEventArgs args)
{
//System.Diagnostics.Debug.WriteLine("Enter");
/*
* When FullRowSelect is true, we have two problems:
* 1) GetItemRect(ItemOnly) returns the whole row rather than just the icon/text, which messes
* up our calculation of the drop rectangle.
* 2) during the drag, the Timer events will not fire! This is the major problem, since without
* those events we can't autoscroll.
*
* The first problem we can solve through coding, but the second is more difficult.
* We avoid both problems by turning off FullRowSelect during the drop operation.
*/
this.originalFullRowSelect = this.ListView.FullRowSelect;
this.ListView.FullRowSelect = false;
// Setup our drop event args block
this.dropEventArgs = new ModelDropEventArgs();
this.dropEventArgs.DropSink = this;
this.dropEventArgs.ListView = this.ListView;
this.dropEventArgs.DataObject = args.Data;
OLVDataObject olvData = args.Data as OLVDataObject;
if (olvData != null)
{
this.dropEventArgs.SourceListView = olvData.ListView;
this.dropEventArgs.SourceModels = olvData.ModelObjects;
}
this.Over(args);
}
public virtual void EndDrag(Object dragObject, DragDropEffects effect)
{
OLVDataObject data = dragObject as OLVDataObject;
if (data == null)
{
return;
}
if (this.RefreshAfterDrop)
{
data.ListView.RefreshObjects(data.ModelObjects);
}
}