获取 ToolStripDropDownMenu 的 (ToolStrip) 父级

Get the (ToolStrip) parent of a ToolStripDropDownMenu

我正在写自定义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
    }
}

我猜 OnRenderImageMargin 被下拉菜单调用,因为这是将要呈现的内容,但是我想获得父项 ToolStrip/MenuStrip/StatusStrip 导致 OnRenderImageMargin 调用。

这可能吗?

我以为 e.ToolStrip.Parent 属性 会是关键,但它总是 null

一个选项是在您的 ToolStripProfessionalRenderer 中创建构造函数,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
        {
        }
    }

然后在实例化的时候传入一个引用:

toolStrip1.Renderer = new CustomRenderer(toolStrip1);

statusStrip1.Renderer = new CustomRenderer(statusStrip1);

替代选项,修改自 this answer

忘记构造函数并反复测试 Owner 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
    {
    }      
}