private bool ValidateListBox(ProjectEditor editor, DragEventArgs e, bool bExecute, ListBox list)
{
var sourceItem = e.Data.Get(DragDataFormats.Parent);
var targetItem = (e.Source as IControl)?.Parent;
if (sourceItem is ListBoxItem source && targetItem is ListBoxItem target)
{
if (source.Parent == target.Parent)
{
int sourceIndex = list.ItemContainerGenerator.IndexFromContainer(source);
int targetIndex = list.ItemContainerGenerator.IndexFromContainer(target);
switch (list.DataContext)
{
case Library <ShapeStyle> library:
{
if (e.DragEffects == DragDropEffects.Copy)
{
if (bExecute)
{
// TODO: Clone item.
}
return(true);
}
else if (e.DragEffects == DragDropEffects.Move)
{
if (bExecute)
{
editor?.MoveItem(library, sourceIndex, targetIndex);
}
return(true);
}
else if (e.DragEffects == DragDropEffects.Link)
{
if (bExecute)
{
editor?.SwapItem(library, sourceIndex, targetIndex);
}
return(true);
}
return(false);
}
case Library <GroupShape> library:
{
if (e.DragEffects == DragDropEffects.Copy)
{
if (bExecute)
{
// TODO: Clone item.
}
return(true);
}
else if (e.DragEffects == DragDropEffects.Move)
{
if (bExecute)
{
editor?.MoveItem(library, sourceIndex, targetIndex);
}
return(true);
}
else if (e.DragEffects == DragDropEffects.Link)
{
if (bExecute)
{
editor?.SwapItem(library, sourceIndex, targetIndex);
}
return(true);
}
return(false);
}
default:
return(false);
}
}
else if (source.Parent is ListBox sourceList && target.Parent is ListBox targetList)
{
if (sourceList.DataContext?.GetType() == targetList.DataContext?.GetType())
{
if (bExecute)
{
// TODO: Exchange items between lists.
}
return(true);
}
return(false);
}
return(false);
}
return(false);
}
