mirror of
https://github.com/xcp-ng/xenadmin.git
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122 lines
4.2 KiB
C#
122 lines
4.2 KiB
C#
/* Copyright (c) Cloud Software Group, Inc.
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*
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* Redistribution and use in source and binary forms,
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* with or without modification, are permitted provided
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* that the following conditions are met:
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*
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* * Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the
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* following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the
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* following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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using System;
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using System.ComponentModel;
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using System.Windows.Forms;
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using System.Drawing;
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namespace XenAdmin.Controls
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{
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public partial class DropDownButton : Button
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{
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private ContextMenuStrip _contextMenuStrip;
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private bool _ignoreNextClick;
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public DropDownButton()
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{
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InitializeComponent();
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base.Image = Images.StaticImages.expanded_triangle;
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base.ImageAlign = ContentAlignment.MiddleRight;
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DoubleBuffered = true;
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}
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protected override void OnContextMenuStripChanged(EventArgs e)
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{
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base.OnContextMenuStripChanged(e);
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if (_contextMenuStrip != null)
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{
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_contextMenuStrip.Closed -= _contextMenuStrip_Closed;
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_contextMenuStrip.Opening -= _contextMenuStrip_Opening;
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}
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_contextMenuStrip = ContextMenuStrip;
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if (_contextMenuStrip != null)
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{
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_contextMenuStrip.Closed += _contextMenuStrip_Closed;
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_contextMenuStrip.Opening += _contextMenuStrip_Opening;
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// need to add dummy so context menu strip opens even it there aren't any items.
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if (_contextMenuStrip.Items.Count == 0)
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{
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_contextMenuStrip.Items.Add(new ToolStripMenuItem { Name = "dummy" });
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}
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}
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}
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private void _contextMenuStrip_Opening(object sender, CancelEventArgs e)
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{
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_contextMenuStrip.Items.RemoveByKey("dummy");
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}
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private void _contextMenuStrip_Closed(object sender, ToolStripDropDownClosedEventArgs e)
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{
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// ensure that if the user clicks on the button when the menu is open, then the menu is closed,
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// (not opened again.)
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_ignoreNextClick = ClientRectangle.Contains(PointToClient(Cursor.Position));
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}
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protected override void OnClick(EventArgs e)
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{
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base.OnClick(e);
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if (_contextMenuStrip != null && !_ignoreNextClick)
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{
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_contextMenuStrip.Show(this, new Point(0, Height), ToolStripDropDownDirection.Default);
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}
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_ignoreNextClick = false;
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}
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[Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new Image Image
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{
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get
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{
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return base.Image;
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}
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}
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[Browsable(false), DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
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public new ContentAlignment ImageAlign
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{
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get
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{
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return base.ImageAlign;
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}
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}
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}
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}
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