protected virtual void OnDragDropEx(SuperlistDragEventArgs ea)
{
if (DragDropEx != null)
{
DragDropEx(this, ea);
}
}
protected override void OnDragOver(DragEventArgs e)
{
base.OnDragOver(e);
Point pt = PointToClient(new Point(e.X, e.Y));
Section s;
SuperlistDragEventArgs ea = new SuperlistDragEventArgs(SectionFromPoint(pt), e);
OnDragOverEx(ea);
if (ea.SectionAllowedToDropOn == null)
{
s = GetDroppableSection(pt, e.Data);
}
else
{
s = ea.SectionAllowedToDropOn;
}
if (_currentDropSection != null && s != _currentDropSection)
{
_currentDropSection.DragLeave();
if (s != null)
{
for (Section parent = s.Parent; parent != null; parent = parent.Parent)
{
parent.DescendentDraggedOver(s);
}
}
}
_currentDropSection = s;
if (s != null)
{
if (e.Effect == DragDropEffects.None)
{
e.Effect = e.AllowedEffect;
}
s.DraggingOver(pt, e.Data);
}
else
{
e.Effect = DragDropEffects.None;
}
}
protected virtual void OnDragOverEx( SuperlistDragEventArgs ea )
{
if( DragOverEx != null )
{
DragOverEx( this, ea );
}
}
protected override void OnDragOver( DragEventArgs e )
{
base.OnDragOver( e );
Point pt = PointToClient( new Point( e.X, e.Y ) );
Section s;
SuperlistDragEventArgs ea = new SuperlistDragEventArgs( SectionFromPoint( pt ), e );
OnDragOverEx( ea );
if( ea.SectionAllowedToDropOn == null )
{
s = GetDroppableSection( pt, e.Data );
}
else
{
s = ea.SectionAllowedToDropOn;
}
if( _currentDropSection != null && s != _currentDropSection )
{
_currentDropSection.DragLeave();
if( s != null )
{
for( Section parent = s.Parent; parent != null; parent = parent.Parent )
{
parent.DescendentDraggedOver( s );
}
}
}
_currentDropSection = s;
if( s != null )
{
if( e.Effect == DragDropEffects.None )
{
e.Effect = e.AllowedEffect;
}
s.DraggingOver( pt, e.Data );
}
else
{
e.Effect = DragDropEffects.None;
}
}