/// <summary>
/// Initialize a new instance of the DockCluster class.
/// </summary>
/// <param name="paletteDragDrop">Drawing palette.</param>
/// <param name="renderer">Drawing renderer.</param>
/// <param name="target">Initial target for the cluster.</param>
public DockCluster(IPaletteDragDrop paletteDragDrop,
IRenderer renderer,
DragTarget target)
{
_paletteDragDrop = paletteDragDrop;
_renderer = renderer;
_screenRect = target.ScreenRect;
_drawRect = target.DrawRect;
_hintToTarget = new HintToTarget();
_hintToTarget.Add(target.Hint & DragTargetHint.ExcludeFlags, target);
_excludeCluster = (target.Hint & DragTargetHint.ExcludeCluster) == DragTargetHint.ExcludeCluster;
}
/// <summary>
/// Add the new target to the cluster.
/// </summary>
/// <param name="target">Target to add into cluster.</param>
public void Add(DragTarget target)
{
// Find the hint that excludes extra flags
DragTargetHint hint = target.Hint & DragTargetHint.ExcludeFlags;
// Can only add one of each hint value
if (!_hintToTarget.ContainsKey(hint))
{
_hintToTarget.Add(hint, target);
// Make sure the drawing rectangle encloses all targets
DrawRect = Rectangle.Union(DrawRect, target.DrawRect);
}
}
