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/