/// <summary>
/// Handle mouse hover over an item to display a tooltip.
/// </summary>
protected override void OnMouseHover(EventArgs e)
{
base.OnMouseHover(e);
CanvasElementBase item = CanvasItemLayout.ItemFromPosition(_lastMousePosition);
if (item != null && item.HasToolTip)
{
_tooltip.Show(item.ToolTipString, this, _lastMousePosition.X + 16, _lastMousePosition.Y, 2500);
}
}
/// <summary>
/// Handle mouse movement to set the cursor.
/// </summary>
protected override void OnMouseMove(MouseEventArgs e)
{
if ((e.Button & MouseButtons.Left) == MouseButtons.Left)
{
if (_dragBoxFromMouseDown != Rectangle.Empty && !_dragBoxFromMouseDown.Contains(e.X, e.Y))
{
// OK - it is definitely a drag so handle it as such.
DoDragDrop(this, DragDropEffects.All | DragDropEffects.Link);
return;
}
}
base.OnMouseMove(e);
CanvasElementBase item = CanvasItemLayout.ItemFromPosition(e.Location);
Cursor = (item != null && item.ID != ActionID.None) ? Cursors.Hand : Cursors.Default;
_lastMousePosition = e.Location;
}
/// <summary>
/// Handle mouse clicks on the control.
/// </summary>
/// <param name="e">Mouse event argument</param>
protected override void OnMouseClick(MouseEventArgs e)
{
_view.HandleSelect(this, CanvasItemLayout.ItemFromPosition(e.Location));
}