Question

我有一个自定义TabControl，其中TabPages与ContextMenu绑定了它们。

我希望菜单仅在点击页面标题时显示。

我所做的是，当点击TabControl时，我会检查以下条件：

private void MouseUp(object sender, MouseEventArgs e) 
{
    if (e.Button == Mousebuttons.Right) 
    {
        for (int i = 0; i < TabCount; ++i) 
        {
            Rectangle r = GetTabRect(i);
            if (r.Contains(e.Location) /* && it is the header that was clicked*/) 
            {
                // Change slected index, get the page, create contextual menu
                ContextMenu cm = new ContextMenu();
                // Add several items to menu
                page.ContextMenu = cm;
                page.ContextMenu.Show(this, e.Location);
            }
        }
    }
}

如果我将MouseUp绑定到TabControl，我会在整个ContextMenu中获得TabPage。如果我将其绑定到TabPage，我只会在正文中获得ContextMenu，而不是在标题中。

有没有办法让ContextMenu只显示在标题点击？

Answer 1

只是不要将ContextMenu分配给任何东西......只需显示它：

public class MyTabControl : TabControl
{

    protected override void OnMouseUp(MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Right)
        {
            for (int i = 0; i < TabCount; ++i)
            {
                Rectangle r = GetTabRect(i);
                if (r.Contains(e.Location) /* && it is the header that was clicked*/)
                {
                    // Change slected index, get the page, create contextual menu
                    ContextMenu cm = new ContextMenu();
                    // Add several items to menu
                    cm.MenuItems.Add("hello");
                    cm.MenuItems.Add("world!");
                    cm.Show(this, e.Location);
                    break;
                }
            }
        }
        base.OnMouseUp(e);
    }

}

Answer 2

而不是像Idle_Mind所说的那样覆盖，你也可以对mouseevent上的普通tabcontrol做同样的事情：

    private void tabControl1_MouseClick(object sender, MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Right)
        {
            for (int i = 0; i < tabControl1.TabCount; ++i)
            {
                Rectangle r = tabControl1.GetTabRect(i);
                if (r.Contains(e.Location) /* && it is the header that was clicked*/)
                {
                    // Change slected index, get the page, create contextual menu
                    ContextMenu cm = new ContextMenu();
                    // Add several items to menu
                    cm.MenuItems.Add("hello");
                    cm.MenuItems.Add("world!");
                    cm.Show(tabControl1, e.Location);
                    break;
                }
            }
        }
    }

它完全相同，但不会在工具箱中添加额外的控件:) 如果要在多个TabControl上使用它，也可以使它成为通用的。

    private void showContextMenu_MouseClick(object sender, MouseEventArgs e)
    {
        if (e.Button == System.Windows.Forms.MouseButtons.Right)
        {
            TabControl tabControl1 = sender as TabControl;
            [...]

如何将ContextMenu放入TabPage的标题中

2 个答案: