Question

我将MenuStrip左对接在一个表单中，LayoutStyle = VerticalStackWithOverflow，并且我编写了这两个事件处理程序，只有当用户将鼠标移到MenuStrip上时才会显示其文本：

Private Sub MenuStripMainMenu_MouseEnter(sender As Object, e As EventArgs) Handles MenuStripMainMenu.MouseEnter
    For Each c In MenuStripMainMenu.Items.OfType(Of ToolStripItem)
        c.DisplayStyle = ToolStripItemDisplayStyle.ImageAndText
    Next
End Sub

Private Sub MenuStripMainMenu_MouseLeave(sender As Object, e As EventArgs) Handles MenuStripMainMenu.MouseLeave, MenuStripMainMenu.LostFocus
    For Each c In MenuStripMainMenu.Items.OfType(Of ToolStripItem)
        c.DisplayStyle = ToolStripItemDisplayStyle.Image
    Next
End Sub

虽然这项工作正常，但是一些MenuItems有自己的MenuItems（作为选择树），当用户将鼠标从根MenuStrip移动到选项时，MenuStrip缩小回＆＃34; icon-only＆＃34;模式，因此展开的菜单看起来很笨拙。

有没有办法检测MenuStrip何时将其中一个项目扩展到其子项目，这样我可以挂起正确的调整程序？

非常感谢！

修改

这是移植到VB.NET的DonBoitnott's answer，我只在MenuDeactivate处理程序中添加了一个后续操作，在菜单被停用后立即将条带缩回到只有图像：

Private MenuStripMainMenu_activated As Boolean = False

Private Sub MenuStripMainMenu_MenuActivate(sender As Object, e As EventArgs) Handles MenuStripMainMenu.MenuActivate
    MenuStripMainMenu_activated = True
End Sub

Private Sub MenuStripMainMenu_MenuDeactivate(sender As Object, e As EventArgs) Handles MenuStripMainMenu.MenuDeactivate
    MenuStripMainMenu_activated = False
    MenuStripMainMenu_MouseLeave(sender, e)
End Sub

Private Sub MenuStripMainMenu_MouseEnter(sender As Object, e As EventArgs) Handles MenuStripMainMenu.MouseEnter
    For Each c In MenuStripMainMenu.Items.OfType(Of ToolStripItem)
        c.DisplayStyle = ToolStripItemDisplayStyle.ImageAndText
    Next
End Sub

Private Sub MenuStripMainMenu_MouseLeave(sender As Object, e As EventArgs) Handles MenuStripMainMenu.MouseLeave
    If Not MenuStripMainMenu_activated Then
        For Each c In MenuStripMainMenu.Items.OfType(Of ToolStripItem)
            c.DisplayStyle = ToolStripItemDisplayStyle.Image
        Next
    End If
End Sub

Answer 1

您目前拥有的活动以及添加MenuActivate和MenuDeactivate的组合可以表现为：

 public partial class Form1 : Form
    {
        private Boolean _activated = false;

        public Form1()
        {
            InitializeComponent();
        }

        private void menuStrip1_MouseEnter(Object sender, EventArgs e)
        {
            foreach (var c in menuStrip1.Items.OfType<ToolStripItem>())
                c.DisplayStyle = ToolStripItemDisplayStyle.ImageAndText;
        }

        private void menuStrip1_MouseLeave(Object sender, EventArgs e)
        {
            if (!_activated)
            {
                foreach (var c in menuStrip1.Items.OfType<ToolStripItem>())
                    c.DisplayStyle = ToolStripItemDisplayStyle.Image;
            }
        }

        private void menuStrip1_MenuActivate(Object sender, EventArgs e)
        {
            _activated = true;
        }

        private void menuStrip1_MenuDeactivate(Object sender, EventArgs e)
        {
            _activated = false;
            foreach (var c in menuStrip1.Items.OfType<ToolStripItem>())
                c.DisplayStyle = ToolStripItemDisplayStyle.Image;
        }
    }

如何检测MenuStrip何时将其中一个项目扩展到其子项目？

1 个答案: