我正在尝试绘制拖动分隔器控件时出现的分隔线:



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?

最佳答案

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。如果不显示Form控件,而是将它显示为拆分器处理程序,并将其显示在拆分器的容器上方,则闪烁将消失。

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,但更改了突出显示的显示方式:


Change Splitter Highlighting/Resize Line

关于c# - C#WinForms中的自定义绘画拆分器控件,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/28878310/

10-09 22:34