c# WinForm:删除或自定义按钮的“焦点矩形" [英] c# WinForm: Remove or Customize the 'Focus Rectangle' for Buttons

问题描述

有没有办法禁用或更好地为常规按钮控件绘制自己的焦点矩形！(那条虚线看起来很像 Windows 95ish)

Is there a way to disable or better yet draw your own focus rectangle for a regular button control! (that dotted line seems so Windowss 95ish)

我注意到控件属性(FOR BUTTONS)没有 ownerdrawfixed 设置(我不知道这是否是用于解决方案的路径，尽管我已经看到它用于自定义其他控件).

I've noticed that the control properties (FOR BUTTONS) does not have a ownerdrawfixed setting (which I don't know if that's even the route to use for the solution, although i've seen it used for customizing other controls).

推荐答案

要做到这一点比听起来更棘手.毫无疑问，自定义按钮绘制不可覆盖的原因之一.这按预期工作:

Getting this right is trickier than it sounds. No doubt one of the reasons that custom button painting isn't overridable. This worked as expected:

using System;
using System.Drawing;
using System.Windows.Forms;
using System.Windows.Forms.VisualStyles;

class MyButton : Button {
    private VisualStyleRenderer renderer;
    protected override void OnPaint(PaintEventArgs e) {
        base.OnPaint(e);
        if (this.Focused && Application.RenderWithVisualStyles && this.FlatStyle == FlatStyle.Standard) {
            if (renderer == null) {
                VisualStyleElement elem = VisualStyleElement.Button.PushButton.Normal;
                renderer = new VisualStyleRenderer(elem.ClassName, elem.Part, (int)PushButtonState.Normal);
            }
            Rectangle rc = renderer.GetBackgroundContentRectangle(e.Graphics, new Rectangle(0, 0, this.Width, this.Height));
            rc.Height--;
            rc.Width--;
            using (Pen p = new Pen(Brushes.DarkGray)) {
                e.Graphics.DrawRectangle(p, rc);
            }
        }
    }
}

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