将按钮控件添加到SplitContainer Splitter

Question

有没有什么方法可以在可调整的拆分器上显示控件（如按钮），该拆分器在.NET的两个面板之间显示？SplitContainer？

例子：

我不认为SplitContainer本身支持这一点，但覆盖的控制得到这个功能似乎无所不在的许多应用似乎有点多，我 - 我觉得就像我过度思考这个或者错过了一些明显的东西。

Answer 1

下面是一个使用TableLayoutPanel来模拟SplitContainer的示例。

using System; 
using System.Diagnostics; 
using System.Drawing; 
using System.Windows.Forms; 

class Form1 : Form 
{ 
    [STAThread] 
    static void Main() 
    { 
     Application.EnableVisualStyles(); 
     Application.SetCompatibleTextRenderingDefault(false); 
     Application.Run(new Form1()); 
    } 

    TableLayoutPanel rootPanel; 
    float originalWidth; 
    int splitPointX; 

    public Form1() 
    { 
     Controls.Add(rootPanel = new TableLayoutPanel 
     { 
      ColumnCount = 3, 
      ColumnStyles = 
      { 
       // Notice the use of Absolute here as this will control the 'splitting' 
       new ColumnStyle(SizeType.Absolute, 120F), 
       // Size of button panel 
       new ColumnStyle(SizeType.AutoSize), 
       // Remaining size 
       new ColumnStyle(SizeType.Percent, 100F), 
      }, 
      Dock = DockStyle.Fill, 
      RowCount = 1, 
      RowStyles = { new RowStyle(SizeType.Percent, 100F) }, 
     }); 

     Panel buttonPanel; 
     rootPanel.Controls.Add(buttonPanel = new Panel 
     { 
      Anchor = AnchorStyles.Top | AnchorStyles.Bottom, 
      BackColor = SystemColors.ControlDark, 
      Margin = new Padding(0), 
      MinimumSize = new Size(80, 0), 
      Size = new Size(80, 0), 
      Controls = 
      { 
       // UseVisualStyleBackColor = true only because we altered the container's BackColor 
       new Button { Text = ">>", Location = new Point(19, 112), Size = new Size(40, 23), UseVisualStyleBackColor = true }, 
       new Button { Text = ">", Location = new Point(19, 83), Size = new Size(40, 23), UseVisualStyleBackColor = true }, 
       new Button { Text = "<", Location = new Point(19, 54), Size = new Size(40, 23), UseVisualStyleBackColor = true }, 
       new Button { Text = "<<", Location = new Point(19, 25), Size = new Size(40, 23), UseVisualStyleBackColor = true }, 
      }, 
     }, 1, 0); 

     buttonPanel.MouseDown += (s, e) => 
      { 
       if (e.Button == MouseButtons.Left) 
       { 
        // Capture mouse so that all mouse move messages go to this control 
        (s as Control).Capture = true; 

        // Record original column width 
        originalWidth = rootPanel.ColumnStyles[0].Width; 

        // Record first clicked point 
        // Convert to screen coordinates because this window will be a moving target 
        Point windowPoint = (s as Control).PointToScreen(e.Location); 
        splitPointX = windowPoint.X; 
       } 
      }; 
     buttonPanel.MouseMove += (s, e) => 
      { 
       if ((s as Control).Capture) 
       { 
        Point windowPoint = (s as Control).PointToScreen(e.Location); 

        // Calculate distance of mouse from splitPoint 
        int offset = windowPoint.X - splitPointX; 

        // Apply to originalWidth 
        float newWidth = originalWidth + offset; 

        // Clamp it. 
        // The control in the left pane's MinimumSize.Width would be more appropriate than zero 
        newWidth = Math.Max(0, newWidth); 

        // Update column width 
        if (Math.Abs(newWidth - rootPanel.ColumnStyles[0].Width) >= 1) 
         rootPanel.ColumnStyles[0].Width = newWidth; 
       } 
      }; 
     buttonPanel.MouseUp += (s, e) => 
      { 
       if (e.Button == MouseButtons.Left) 
       { 
        // Release mouse capture 
        if ((s as Control).Capture) 
         (s as Control).Capture = false; 
       } 
      }; 
    } 
}