xenadmin/XenAdmin/Commands/Controls/VMOperationToolStripMenuSubItem.cs
Michael ebb918296b CA-284226: Optimize performance of menu Start-on-Server and Migrate-to-Server (#1985)
* CA-284226: Reduce unnecessary CanExecute() calls.

* CA-284226: Optimize the performance of menu Migrate to Server and Start on Server.

* Fix an error in updating Migrate menu with WLB, which lead to crash.

* Clear the worker queue when menu is closed.

Signed-off-by: Michael Zhao <michael.zhao@citrix.com>

* Fix comments.
2018-03-20 07:07:19 +00:00

108 lines
3.3 KiB
C#

/* Copyright (c) Citrix Systems, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms,
* with or without modification, are permitted provided
* that the following conditions are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
using System;
using System.Collections.Generic;
using System.Text;
using XenAdmin.Controls;
using System.Drawing;
using XenAPI;
namespace XenAdmin.Commands
{
internal class VMOperationToolStripMenuSubItem : VisualMenuItem
{
private VMOperationCommand _command;
public VMOperationToolStripMenuSubItem(string text, Image image)
: base(text, image)
{
Enabled = false;
}
public VMOperationToolStripMenuSubItem(VMOperationCommand command)
{
Util.ThrowIfParameterNull(command, "command");
Command = command;
Enabled = command != null && command.CanExecute();
}
private void Update()
{
if (_command != null)
{
if (_command.MenuText != null)
{
Text = _command.MenuText;
}
if (_command.MenuImage != null)
{
Image = _command.MenuImage;
}
if (_command.SecondImage != null)
{
SecondImage = _command.SecondImage;
}
//null is allowed (CA-147657)
ToolTipText = _command.ToolTipText;
StarRating = _command.StarRating;
}
}
public VMOperationCommand Command
{
get
{
return _command;
}
set
{
_command = value;
Update();
}
}
protected override void OnClick(EventArgs e)
{
if (_command != null && _command.CanExecute())
{
_command.Execute();
}
base.OnClick(e);
}
}
}