Question

我想将其放置在按下按钮的位置，它将显示已选择哪个按钮。但是，我希望在按钮上进行新选择后消失。我做了一个自定义按钮（下面的代码）。当我单击按钮时，按钮确实会立即更改颜色，但是当我单击第二个按钮时，它不会将背景色更改回原始颜色。

按钮：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Drawing;

namespace InformationBookFinal.User_Control
{
public class FlatButton : Button
{
    public FlatButton()
    {
        BackColor = Color.DodgerBlue;
        ForeColor = Color.White;
        CurrentBackColor = BackColor;
    }

    private Color CurrentBackColor;

    private Color onHoverBackColor = Color.DarkOrchid;
    public Color OnHoverBackColor
    {
        get { return onHoverBackColor; }
        set { onHoverBackColor = value; Invalidate(); }
    }

    protected override void OnMouseEnter(EventArgs e)
    {
        base.OnMouseEnter(e);
        CurrentBackColor = onHoverBackColor;
        Invalidate();
    }

    protected override void OnMouseLeave(EventArgs e)
    {
        base.OnMouseLeave(e);
        CurrentBackColor = BackColor;
        Invalidate();
    }

    protected override void OnMouseDown(MouseEventArgs mevent)
    {
        base.OnMouseDown(mevent);
        CurrentBackColor = Color.RoyalBlue;
        Invalidate();
    }

    protected override void OnMouseUp(MouseEventArgs mevent)
    {
        base.OnMouseUp(mevent);
        CurrentBackColor = BackColor;
        Invalidate();
    }

    protected override void OnPaint(PaintEventArgs pevent)
    {
        base.OnPaint(pevent);
        pevent.Graphics.FillRectangle(new SolidBrush(CurrentBackColor), 0, 0, Width, Height);
        TextFormatFlags flags = TextFormatFlags.HorizontalCenter | TextFormatFlags.VerticalCenter;
        TextRenderer.DrawText(pevent.Graphics, Text, Font, new Point(Width + 3, Height / 2), ForeColor, flags);
    }
  }
}

按钮操作：

    private void flatButton2_Click(object sender, EventArgs e)
    {
        flatButton1.BackColor = Color.DodgerBlue;
        flatButton1.Hide();
        flatButton1.Show();

    }

    private void flatButton1_Click(object sender, EventArgs e)
    {
        flatButton1.BackColor = Color.Pink;
    }

Answer 1

设置BackColor值时，不会更新在Paint方法中使用的CurrentBackColor值。

因此，请尝试覆盖该属性：

public override Color BackColor {
  get {
    return base.BackColor;
  }
  set {
    base.BackColor = value;
    CurrentBackColor = value;
    this.Invalidate();
  }
}

按下其他按钮后按钮未更改颜色

1 个答案: