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C#WinForms中的自定义绘画拆分器控件

[英]Custom paint Splitter control in C# WinForms

我试图绘制拖动分隔器控件时出现的分隔线:

分离器

从该图像可以看到,默认的拆分器是棋盘格。

...这不起作用:

public partial class MockForm : Form
{
    public MockForm()
    {
        InitializeComponent();
        this.splitter1.Paint += splitter1_Paint;
    }

    private void splitter1_Paint(object sender, PaintEventArgs e)
    {
        e.Graphics.Clear(Color.Red);
    }
}

这只是绘制控件的背景,而不是拖动时的拆分器。

有任何想法吗?

LarsTech发布的答案确实很好,但是处理程序的闪烁某种程度上令人讨厌。 而不是显示在控制的Form ,如果你表现出一个Form为分流处理,并显示它分离器的容器上方,闪烁将会消失。

HighLight f = new HighLight() { BackColor = Color.Red };
private void splitter1_SplitterMoving(object sender, SplitterEventArgs e)
{
    this.splitter1.Parent.Refresh();
    f.Location = this.splitter1.Parent.PointToScreen(new Point(e.SplitX, e.SplitY));
    f.Size = this.splitter1.Size;
    if (!f.Visible)
        f.ShowInactiveTopmost();
}
private void splitter1_SplitterMoved(object sender, SplitterEventArgs e)
{
    f.Hide();
}

这是我用来突出显示的形式:

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
public class HighLight : Form
{
    public HighLight()
    {
        Opacity = 0;
        FormBorderStyle = FormBorderStyle.None;
        ShowInTaskbar = false;
        StartPosition = FormStartPosition.Manual;
    }
    protected override void OnDeactivate(EventArgs e)
    {
        base.OnDeactivate(e);
        this.Hide();
    }
    private const int SW_SHOWNOACTIVATE = 4;
    private const int HWND_TOPMOST = -1;
    private const uint SWP_NOACTIVATE = 0x0010; 
    [DllImport("user32.dll", EntryPoint = "SetWindowPos")]
    static extern bool SetWindowPos(int hWnd, int hWndInsertAfter,
         int X, int Y, int cx, int cy, uint uFlags);
    [DllImport("user32.dll")]
    static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
    public void ShowInactiveTopmost()
    {
        ShowWindow(this.Handle, SW_SHOWNOACTIVATE);
        SetWindowPos(this.Handle.ToInt32(), HWND_TOPMOST,
        this.Left, this.Top, this.Width, this.Height,
        SWP_NOACTIVATE);
        this.Opacity = 1;
    }
}

要查看支持透明处理程序的自定义拆分器,请查看此相关文章。 在另一篇文章中,我使用原始拆分器的源代码创建了一个新的拆分器控件,但是更改了突出显示:

旧的Splitter控件使用私有的绘画方法来产生棋盘格效果,因此您无法重写任何东西来替换它。

您可以通过在屏幕上看到的棋盘格控件的空间中拖动自己的控件来伪造它。 这可能会产生闪烁:

Control draggingControl = new Control { BackColor = Color.Green, Visible = false };

public MockForm() {
  InitializeComponent();
  this.Controls.Add(draggingControl);
  splitter1.SplitterMoving += splitter1_SplitterMoving;
  splitter1.SplitterMoved += splitter1_SplitterMoved;
}

void splitter1_SplitterMoving(object sender, SplitterEventArgs e) {
  draggingControl.Bounds = new Rectangle(new Point(e.X - (e.X - e.SplitX), 0),
                                         splitter1.Size);
  if (!draggingControl.Visible) {
    draggingControl.Visible = true;
    draggingControl.BringToFront();
  }
  this.Refresh();
}

void splitter1_SplitterMoved(object sender, SplitterEventArgs e) {
  draggingControl.Visible = false;
  this.Refresh();
}

不推荐使用Splitter控件,而推荐使用SplitContainer控件。

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