Question

我需要在我的应用程序中自定义ToolStripMenuItems。打开子菜单的每个ToolStripMenuItem在文本附近都有一个黑色箭头。我想改变一些颜色（MenuItemSelected，MenuItemBorder，MenuItemSelectedGradientBegin，...）和这个箭头的颜色。我已经创建了一个MyColor类来解决第一个问题

public class MyColorTable : ProfessionalColorTable
{
  public override Color MenuItemSelected
  {
    get { return Color.Silver; }
  }

  public override Color MenuItemBorder
  {
    get { return Color.WhiteSmoke; }
  }

  public override Color MenuItemSelectedGradientBegin
  {
    get { return Color.FromArgb(60, 60, 60); }
  } 
}

和另一个改变箭头颜色的类

public class CustomToolStripRenderer : ToolStripProfessionalRenderer
{
  private readonly ToolStripProfessionalRenderer _toolStripRenderer;

  public CustomToolStripRenderer(ToolStripProfessionalRenderer toolStripRenderer)
  {
    _toolStripRenderer = toolStripRenderer;
  }

  protected override void OnRenderArrow(ToolStripArrowRenderEventArgs e)
  {
   var tsMenuItem = e.Item as ToolStripMenuItem;
   if (tsMenuItem != null)
     e.ArrowColor = Color.White;
   base.OnRenderArrow(e);
  }

  public void Render()
  {
   _toolStripRenderer.RoundedEdges = false;
   ToolStripManager.Renderer = this;
   //ToolStripManager.Renderer = _toolStripRenderer;
  }
}

当我调用Render（）方法时

    CustomToolStripRenderer customRenderer = new CustomToolStripRenderer(new ToolStripProfessionalRenderer(new MyColorTable()));

    customRenderer.Render();

我知道箭头变成了白色但我因为这条线而失去了第一次变化

 ToolStripManager.Renderer = this;

由于静态类ToolStripManager

，我无法找到解决此问题的简单解决方案

Answer 1

很难理解代码，你肯定需要摆脱_toolStripRenderer变量。我会写：

    public class CustomToolStripRenderer : ToolStripProfessionalRenderer {
        public CustomToolStripRenderer() : base(new MyColorTable()) {
            this.RoundEdges = true;
        }
        protected override void OnRenderArrow(ToolStripArrowRenderEventArgs e) {
            // etc..
        }
    }

然后在表单构造函数中：

    public Form1() {
        InitializeComponent();
        ToolStripManager.Renderer = new CustomToolStripRenderer();
    }

工作正常。

在c＃中自定义ToolStripMenuItems

1 个答案: