c# - "Tool tip"是否被 ToolStripItems 覆盖(如果它们有下拉项)？

Question

在 Windows 窗体中 - 如果 MenuStrip 的下拉项有工具提示和下拉项本身，则工具提示将有大约 50% 的机会显示在 ToolStripItems 下方。

解决方法是什么？

要重现，您可以在 Visual Studio 中创建 MenuStrip 或仅将以下代码添加到表单，然后尝试将鼠标悬停在菜单项上以获取工具提示:

        //Make a menu strip
        MenuStrip menu = new MenuStrip();            
        this.Controls.Add(menu);

        //Add category "File"
        ToolStripMenuItem fileItem = new ToolStripMenuItem("File");
        menu.Items.Add(fileItem);

        //Add items
        for (int i = 0; i < 10; i++)
        {
            ToolStripMenuItem item = new ToolStripMenuItem("item");
            item.ToolTipText = "item tooltip";
            item.DropDownItems.Add("sub item");

            fileItem.DropDownItems.Add(item);
        }

我正在使用 .NET 3.5

Answer 1

试试这段代码

//Make a menu strip
MenuStrip menu = new MenuStrip();
this.Controls.Add(menu);

//Add category "File"
ToolStripMenuItem fileItem = new ToolStripMenuItem("File");
menu.Items.Add(fileItem);

this.toolTip = new ToolTip();
this.toolTip.AutoPopDelay = 0;
this.toolTip.AutomaticDelay = 0;
this.toolTip.UseAnimation = true;

//Add items
for (int i = 0; i < 10; i++)
{
    ToolStripMenuItem item = new ToolStripMenuItem("item");

    //disable the default tool tip of ToolStripMenuItem
    item.AutoToolTip = false;

    //instead, use Tooltip class to show to text when mouse hovers the item
    item.MouseHover += new EventHandler(item_MouseHover);
    item.DropDownItems.Add("sub item");

    fileItem.DropDownItems.Add(item);
}

void item_MouseHover(object sender, EventArgs e)
{
    ToolStripMenuItem mItem = (ToolStripMenuItem)sender;
    toolTip.Show("tool tip", mItem.Owner, 1500);
}