protected override DragHandleAnchor SetCursor(Point point, ImageBox box)
{
Cursor cursor = Cursors.Default;
DragHandleAnchor handleAnchor = DragHandleAnchor.None;
if (Selected)
{
var handle = HitTest(point);
if (handle != null)
{
handleAnchor = handle.Anchor;
if (handleAnchor != DragHandleAnchor.None && handle.Enabled)
{
_selectHandle = handle;
switch (handleAnchor)
{
case DragHandleAnchor.TopLeft:
cursor = Cursors.SizeAll;
break;
case DragHandleAnchor.MiddleCenter:
cursor = Cursors.SizeAll;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}
}
box.Cursor = cursor;
return(handleAnchor);
}
protected virtual void DrawDragHandle(Graphics graphics, DragHandle handle)
{
int left;
int top;
int width;
int height;
Pen outerPen;
Brush innerBrush;
left = handle.Bounds.Left;
top = handle.Bounds.Top;
width = handle.Bounds.Width;
height = handle.Bounds.Height;
if (handle.Enabled)
{
outerPen = new Pen(Color.Orange);
innerBrush = Brushes.OrangeRed;
}
else
{
outerPen = SystemPens.ControlDark;
innerBrush = SystemBrushes.Control;
}
graphics.FillRectangle(innerBrush, left + 1, top + 1, width - 2, height - 2);
graphics.DrawLine(outerPen, left + 1, top, left + width - 2, top);
graphics.DrawLine(outerPen, left, top + 1, left, top + height - 2);
graphics.DrawLine(outerPen, left + 1, top + height - 1, left + width - 2, top + height - 1);
graphics.DrawLine(outerPen, left + width - 1, top + 1, left + width - 1, top + height - 2);
}
public override DragHandle HitTest(Point point)
{
if (DragHandleList == null || DragHandleList.Count < 1)
{
return(null);
}
DragHandle result = null;
foreach (DragHandle handle in DragHandleList)
{
if (handle.Visible && handle.Bounds.Contains(point))
{
result = handle;
break;
}
}
return(result);
}