您好我在下面这个图片(链接)的面板中实现自定义菜单。
继承人http://i.imgur.com/5OlRk9c.png
链接我的问题是,如何检测用户点击表单的其他部分,除了菜单面板和按钮(红色圆圈内)。
我已经使用了LostFocus事件,但没有任何反应。
请帮忙。
答案 0 :(得分:0)
您可以在通过IMessageFilter将鼠标消息路由到控件之前捕获它们。然后,您可以检查光标位置是在面板边界内还是外面。这是Panel1的一个简单示例:
Public Class Form1
Private WithEvents filter As New MyFilter
Private Sub Form1_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
Application.AddMessageFilter(filter)
End Sub
Private Sub filter_LeftClick() Handles filter.LeftClick
Dim rc As Rectangle = Panel1.RectangleToScreen(Panel1.ClientRectangle)
If Not rc.Contains(Cursor.Position) Then
Debug.Print("Click outside of Panel1")
End If
End Sub
Private Class MyFilter
Implements IMessageFilter
Public Event LeftClick()
Private Const WM_LBUTTONDOWN As Integer = &H201
Public Function PreFilterMessage(ByRef m As System.Windows.Forms.Message) As Boolean Implements System.Windows.Forms.IMessageFilter.PreFilterMessage
Select Case m.Msg
Case WM_LBUTTONDOWN
RaiseEvent LeftClick()
End Select
Return False
End Function
End Class
End Class