DockPanel的一点点改进

1、当双击Tab时，原先是直接把当前Tab所表示的这个窗体，从主窗体的框架上分离现来，成为一个浮动的窗体。这不是我想要的，我把它改成了双击关闭。
在DockPaneStripBase的WndProc方法里，对于左键双击消息重新作了处理（下面注释掉的一行是原先的写法，它下面那行是改的）：

[SecurityPermission(SecurityAction.LinkDemand, Flags = SecurityPermissionFlag.UnmanagedCode)]
protected override void WndProc(ref Message m)
{
if (m.Msg == (int)Win32.Msgs.WM_LBUTTONDBLCLK)
{
base.WndProc(ref m);

int index = HitTest();
if (DockPane.DockPanel.AllowEndUserDocking && index != -1)
{
IDockContent content = Tabs[index].Content;
//if (content.DockHandler.CheckDockState(!content.DockHandler.IsFloat) != DockState.Unknown)
//content.DockHandler.IsFloat = !content.DockHandler.IsFloat;
if (content.DockHandler.HideOnClose)
content.DockHandler.Hide();
else
content.DockHandler.Close();

}

return;
}

base.WndProc(ref m);
return;
}

2、很多窗体都在Tab中有个右键菜单，右击的里面有关闭，所以最好继承一下DockContent，让其它窗体只要继承这个就有了这个右键菜单

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace WeifenLuo.WinFormsUI.Docking
{
public class DockContentEx : WeifenLuo.WinFormsUI.Docking.DockContent
{
public DockContentEx()
{
ContextMenuStrip cms = new System.Windows.Forms.ContextMenuStrip();
ToolStripMenuItem tsmiClose = new System.Windows.Forms.ToolStripMenuItem();
//
// cms
//
tsmiClose.Name = "cms";
tsmiClose.Size = new System.Drawing.Size(98, 22);
tsmiClose.Text = "关闭";
tsmiClose.Click += new System.EventHandler(this.tsmiClose_Click);
//
// tsmiClose
//
cms.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
tsmiClose});
cms.Name = "tsmiClose";
cms.Size = new System.Drawing.Size(99, 26);

this.TabPageContextMenuStrip = cms;
}

private void tsmiClose_Click(object sender, EventArgs e)
{
this.Close();
}
}
}