转 C# ToolStrip浮动及上/下/左/右 停靠

关于浮动工具条的制作，阿捷写了一篇很不错的文章，见：http://www.cnblogs.com/ajiefj/archive/2010/04/27/1722256.html
阿捷这个工具条浮动后只能在顶部停靠，基于此，我在这边增加在左/右/底部停靠，停靠条件是浮动窗体紧贴或越过主窗体边缘。

其实阿捷给出的代码已经相当详细了:) 我这里主要给出重写的ToolStrip代码段，增加了三个ToolStripPanel

public partial class MyToolStrip : ToolStrip
{
    public MyToolStrip()
    {
        InitializeComponent();
        this.EndDrag += new EventHandler(MyToolStrip_EndDrag);
        this.SizeChanged += new EventHandler(MyToolStrip_SizeChanged);
    }

    #region 漂浮状态

    public ToolStripFloatWindow FloatWindow { get; set; }

    private bool isFloating
    {
        get
        {
            return (FloatWindow != null);
        }
    }

    public ToolStripPanel TopToolStripPanel { get; set; }
    public ToolStripPanel BottomToolStripPanel { get; set; }
    public ToolStripPanel LeftToolStripPanel { get; set; }
    public ToolStripPanel RightToolStripPanel { get; set; }

    #endregion

    #region 漂浮实现

    private void FloatWindow_LocationChanged(object sender, EventArgs e)
    {
        //当floatwindws的位置移动到 toolstrippanel中时，将this放置到 toolstripPanel上
        if (this.FloatWindow == null)
        {
            return;
        }
        if (FloatWindow.HasCreated)
        {
            //主窗体位置
            Point frmLoc = this.TopToolStripPanel.Parent.Location;
            //浮动工具条位置
            Point toolBarLoc = FloatWindow.Location;

            if (toolBarLoc.Y - frmLoc.Y <= 0) //置于顶部StripPanel
            {
                this.FloatWindow.Controls.Remove(this);
                this.TopToolStripPanel.SuspendLayout();
                this.TopToolStripPanel.Controls.Add(this);
                this.Location = this.TopToolStripPanel.PointToClient(toolBarLoc);
                this.TopToolStripPanel.ResumeLayout();
                this.FloatWindow.Dispose();
                this.FloatWindow = null;
                return;
            }
            if (toolBarLoc.X - frmLoc.X <= 0) //置于左边StripPanel
            {
                this.FloatWindow.Controls.Remove(this);
                this.LeftToolStripPanel.SuspendLayout();
                this.LeftToolStripPanel.Controls.Add(this);
                this.Location = this.LeftToolStripPanel.PointToClient(toolBarLoc);
                this.LeftToolStripPanel.ResumeLayout();
                this.FloatWindow.Dispose();
                this.FloatWindow = null;
                return;
            }
            if (toolBarLoc.X + FloatWindow.Width >= this.TopToolStripPanel.Parent.Width) //置于右边StripPanel
            {
                this.FloatWindow.Controls.Remove(this);
                this.RightToolStripPanel.SuspendLayout();
                this.RightToolStripPanel.Controls.Add(this);
                this.Location = this.RightToolStripPanel.PointToClient(toolBarLoc);
                this.RightToolStripPanel.ResumeLayout();
                this.FloatWindow.Dispose();
                this.FloatWindow = null;
                return;
            }
            if (toolBarLoc.Y + FloatWindow.Height >= this.TopToolStripPanel.Parent.Height) //置于底部StripPanel
            {
                this.FloatWindow.Controls.Remove(this);
                this.BottomToolStripPanel.SuspendLayout();
                this.BottomToolStripPanel.Controls.Add(this);
                this.Location = this.BottomToolStripPanel.PointToClient(toolBarLoc);
                this.BottomToolStripPanel.ResumeLayout();
                this.FloatWindow.Dispose();
                this.FloatWindow = null;
                return;
            }
        }
    }

    private void MyToolStrip_EndDrag(object sender, EventArgs e)
    {
        Point screenPt = Cursor.Position;
        Point clientPt = this.TopToolStripPanel.Parent.PointToClient(screenPt);

        //浮动区域
        Rectangle floatArea = new Rectangle(32, 32,    //我这里图标大小调整为32*32
            this.TopToolStripPanel.Parent.Width - 2 * 32,
            this.TopToolStripPanel.Parent.Height - 2 * 32);

        if (floatArea.Contains(clientPt)) //判断移出时
        {
            ToolStripFloatWindow fw = new ToolStripFloatWindow();
            fw.Controls.Add(this);
            this.Left = 0;
            this.Top = 0;
            this.FloatWindow = fw;
            FloatWindow.LocationChanged += new EventHandler(FloatWindow_LocationChanged);
            fw.SetBounds(screenPt.X, screenPt.Y, this.ClientSize.Width, this.ClientSize.Height + 22); //22为窗体标题栏高度
              fw.Show();
         }
    }

    private void MyToolStrip_SizeChanged(object sender, EventArgs e)
    {
        if (this.isFloating)
        {
            this.FloatWindow.Width = this.ClientSize.Width;
        }
    }

    #endregion

}