Question

我正在通过VB.net处理Windows窗体。该表单包含两个文本框和一个我自己编程的屏幕键盘。

如何确定光标当前所在的文本框，以便屏幕键盘输入正确的文本框？

该应用程序旨在完全基于触摸。

Answer 1

我猜你的屏幕键盘是一个代表键盘的系列按钮。

由于你有两个文本框，你必须为两个文本框都有一个标志，表示它们有焦点，当有一个文本框时，另一个没有。

Private Sub TextBox1_GotFocus(sender as Object, e as EventArgs) _ 
     Handles TextBox1.GotFocus

// These flags are class level variables
textbox1HasFocus = true;
textbox2HasFocus = false;

End Sub

Private Sub TextBox2_GotFocus(sender as Object, e as EventArgs) _ 
     Handles TextBox2.GotFocus

// These flags are class level variables
textbox2HasFocus = true;
textbox1HasFocus = false;

End Sub

用于键盘事件

Private Sub KeyBoard_Click(sender As Object, e As EventArgs) Handles ButtonA.Click, ButtonB.Click, ButtonC.Click, etc...
    ' I don't know how your using your keyboard, but buttonClickLetter could be determined in multiple ways.  I would use either the Name of the control or even the Tag property for retrieving which letter to use
    String buttonClickLetter = DirectCast(sender, Button).Tag.ToString() 
    If textbox1HasFocus Then
        TextBox1.Text += buttonClickLetter
    ElseIf textbox2HadFocus
        TextBox2.Text += buttonClickLetter
    End If
End Sub

确定winform上的哪个文本框中有光标

1 个答案: