1

我正在写一个自定义ToolStripProfessionalRenderer

例如,以下覆盖:

protected override void OnRenderImageMargin(ToolStripRenderEventArgs e)
{
    if(e.ToolStrip is MenuStrip)
    {
        // It never is. It's always ToolStripDropDownMenu
    }
}

我想这OnRenderImageMargin是由下拉菜单调用的,因为这是将要呈现的内容,但是我想获取导致调用的父ToolStrip// MenuStripStatusStripOnRenderImageMargin

这可能吗?

4

1 回答 1

1

我认为e.ToolStrip.Parent财产将是关键,但它总是null

一种选择是在您的 中创建一个构造函数ToolStripProfessionalRenderer,并传入对控件的引用。

class CustomRenderer : ToolStripProfessionalRenderer
{
    // All those controls derive from ToolStrip so we can use the base class here
    private ToolStrip ts;

    public CustomRenderer(ToolStrip ts)
    {
        this.ts = ts;
    }

    protected override void OnRenderImageMargin(ToolStripRenderEventArgs e)
    {
        if (ts is MenuStrip)  
        {
        }
        else if (ts is StatusStrip)
        {
        }
        else  // ts is ToolStrip
        {
        }
    }

然后在实例化它时传入一个引用:

toolStrip1.Renderer = new CustomRenderer(toolStrip1);

statusStrip1.Renderer = new CustomRenderer(statusStrip1);

一个替代选项,从这个答案修改。

忘记 ctor 并Owner重复测试,直到获得正确的父控件:

protected override void OnRenderImageMargin(ToolStripRenderEventArgs e)
{
    ToolStrip owner = e.ToolStrip;
    while (owner is ToolStripDropDownMenu)
        owner = (owner as ToolStripDropDownMenu).OwnerItem.Owner;

    if (ts is MenuStrip)  
    {
    }
    else if (ts is StatusStrip)
    {
    }
    else  // ts is ToolStrip
    {
    }      
}
于 2015-06-11T15:51:26.817 回答