protected override void OnMouseMove(MouseEventArgs e)
{
ToolboxItemBase item = HitTest(e.Location);
if (e.Button == MouseButtons.Left && item is ToolboxItem)
{
ToolboxItem toolboxItem = item as ToolboxItem;
if (toolboxItem.Data != null)
{
this.DoDragDrop(toolboxItem.Data, DragDropEffects.Copy);
}
}
else
{
if (item != null && item.MouseOver == false)
{
if (currentMouseOverItem != null)
{
currentMouseOverItem.MouseOver = false;
Invalidate(GetItemRect(currentMouseOverItem));
}
item.MouseOver = true;
Invalidate(GetItemRect(item));
currentMouseOverItem = item;
}
}
base.OnMouseMove(e);
}
protected override void OnMouseLeave(EventArgs e)
{
base.OnMouseLeave(e);
if (currentMouseOverItem != null)
{
currentMouseOverItem.MouseOver = false;
Invalidate(GetItemRect(currentMouseOverItem));
currentMouseOverItem = null;
}
}
private bool PointOverToolboxItem(Point point, ToolboxItemBase item)
{
if (item.Top == -1)
{
return(false);
}
if (point.Y >= item.Top && point.Y <= item.Top + 18)
{
return(true);
}
return(false);
}
protected override void OnMouseDown(MouseEventArgs e)
{
ToolboxItemBase item = HitTest(e.Location);
if (item is ToolboxItem)
{
ItemMouseDown(item as ToolboxItem);
}
else if (item is ToolboxGroup)
{
GroupMouseDown(item as ToolboxGroup);
}
base.OnMouseDown(e);
}
private Rectangle GetItemRect(ToolboxItemBase item)
{
return(new Rectangle(0, item.Top, this.Width, 19));
}