如何在組合鍵的用戶界面中按下顯示按鈕

其實本帖與this不同（我也發帖）。我在我的用戶界面中有一個電話鍵盤，現在我可以顯示相應按鍵關閉時按下的按鈕。如何在組合鍵的用戶界面中按下顯示按鈕

private void NumDisplayBox_PreviewKeyDown(object sender, KeyEventArgs e) 
{ 
    switch (e.Key) 
    { 
    case Key.D0: 
    case Key.NumPad0: 
     ZeroBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
    case Key.D1: 
    case Key.NumPad1: 
     OneBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
    case Key.D2: 
    case Key.NumPad2: 
     TwoBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
    case Key.D3: 
    case Key.NumPad3: 
     ThreeBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
    case Key.D4: 
    case Key.NumPad4: 
     FourBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
    case Key.D5: 
    case Key.NumPad5: 
     FiveBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
    case Key.D6: 
    case Key.NumPad6: 
     SixBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
    case Key.D7: 
    case Key.NumPad7: 
     SevenBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
    case Key.D8: 
    case Key.NumPad8: 
     EightBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
    case Key.D9: 
    case Key.NumPad9: 
     NineBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
    } 

    if (((Keyboard.Modifiers & ModifierKeys.Shift) == ModifierKeys.Shift)) 
    { 
    if (e.Key == Key.D3) 
    { 
     ThreeBtn.Style = (Style)FindResource("NormalButtonStyle"); 
     HashBtn.Style = (Style)FindResource("PressedButtonStyle"); 
    } 
    } 
} 

private void NumDisplayBox_PreviewKeyUp(object sender, KeyEventArgs e) 
{ 
    switch (e.Key) 
    { 
    case Key.D0: 
    case Key.NumPad0: 
     ZeroBtn.Style = (Style) FindResource("ButtonStyle4"); break; 
    case Key.D1: 
    case Key.NumPad1: 
     OneBtn.Style = (Style) FindResource("ButtonStyle4"); break; 

    . 
    . 
    . 
    } 
}

問題是，當散列鍵（Shift鍵+ 3）或星號鍵（Shift鍵+ 8）爲關閉，則 '3' 鍵（用於殼體散列鍵）在UI也被按壓。如何顯示在Shift + 3關閉時僅在UI上按下哈希按鈕，而不是與「3」按鈕一起使用哈希按鈕？

來源

2015-08-09 YWah

這個工作對我來說：

//Make the button to have "pressed" feel when the corresponding key is pressed 

private void NumDisplayBox_PreviewKeyDown(object sender, KeyEventArgs e) 
{ 
    if (((Keyboard.Modifiers & ModifierKeys.Shift) == ModifierKeys.Shift)) 
    { 
     if (e.Key == Key.D3) 
     HashBtn.Style = (Style) FindResource("PressedButtonStyle"); 

     if (e.Key == Key.D8) 
     StarBtn.Style = (Style) FindResource("PressedButtonStyle"); 
    } 

    switch (e.Key) 
    { 
     case Key.D0: 
     case Key.NumPad0: 
     ZeroBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
     case Key.D1: 
     case Key.NumPad1: 
     OneBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
     case Key.D2: 
     case Key.NumPad2: 
     TwoBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
     case Key.D3: 
     case Key.NumPad3: 
     { 
      if (Keyboard.IsKeyDown(Key.LeftShift) || Keyboard.IsKeyDown(Key.RightShift)) 
      ThreeBtn.Style = (Style) FindResource("ButtonStyle4"); 

      else 
      ThreeBtn.Style = (Style) FindResource("PressedButtonStyle"); 

      break; 
     } 
     case Key.D4: 
     case Key.NumPad4: 
     FourBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
     case Key.D5: 
     case Key.NumPad5: 
     FiveBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
     case Key.D6: 
     case Key.NumPad6: 
     SixBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
     case Key.D7: 
     case Key.NumPad7: 
     SevenBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
     case Key.D8: 
     case Key.NumPad8: 
     { 
      if (Keyboard.IsKeyDown(Key.LeftShift) || Keyboard.IsKeyDown(Key.RightShift)) 
      EightBtn.Style = (Style) FindResource("ButtonStyle4"); 

      else 
      EightBtn.Style = (Style) FindResource("PressedButtonStyle"); 

      break; 
     } 
     case Key.D9: 
     case Key.NumPad9: 
     NineBtn.Style = (Style) FindResource("PressedButtonStyle"); 
     break; 
     default: 
     break; 
    } 
} 

//Return back to its original style 

private void NumDisplayBox_PreviewKeyUp(object sender, KeyEventArgs e) 
{ 
    switch (e.Key) 
    { 
    case Key.D0: 
    case Key.NumPad0: 
     ZeroBtn.Style = (Style) FindResource("ButtonStyle4"); 
     break; 
    case Key.D1: 
    case Key.NumPad1: 
     OneBtn.Style = (Style) FindResource("ButtonStyle4"); 
     break; 
    case Key.D2: 
    case Key.NumPad2: 
     TwoBtn.Style = (Style) FindResource("ButtonStyle4"); 
     break; 
    case Key.D3: 
    case Key.NumPad3: 
     ThreeBtn.Style = (Style) FindResource("ButtonStyle4"); 
     HashBtn.Style = (Style) FindResource("ButtonStyle4"); 
     break; 
    case Key.D4: 
    case Key.NumPad4: 
     FourBtn.Style = (Style) FindResource("ButtonStyle4"); 
     break; 
    case Key.D5: 
    case Key.NumPad5: 
     FiveBtn.Style = (Style) FindResource("ButtonStyle4"); 
     break; 
    case Key.D6: 
    case Key.NumPad6: 
     SixBtn.Style = (Style) FindResource("ButtonStyle4"); 
     break; 
    case Key.D7: 
    case Key.NumPad7: 
     SevenBtn.Style = (Style) FindResource("ButtonStyle4"); 
     break; 
    case Key.D8: 
    case Key.NumPad8: 
     EightBtn.Style = (Style) FindResource("ButtonStyle4"); 
     StarBtn.Style = (Style) FindResource("ButtonStyle4"); 
     break; 
    case Key.D9: 
    case Key.NumPad9: 
     NineBtn.Style = (Style) FindResource("ButtonStyle4"); 
     break; 
    default: 
     break; 
    } 
}

來源

2015-08-09 08:47:34 YWah

檢查KeyEventArgs.Modifiers屬性，並且只在未設置修飾符時處理鍵。

或者，使用TextInput或PreviewTextInput事件來獲取組合文本而不是實際密鑰。無論如何，這可能是更可取的，因爲它將響應任何輸入適當文本輸入的方法，而不是依賴於特定的鍵（例如，您不必爲所有可能的鍵都提供例子，行數字鍵和數字鍵盤鍵，就像你現在一樣）。

來源

2015-08-09 04:52:14

嗨@PeterDuniho，如果我使用「的TextInput」或「PreviewTextInput」，我怎麼能抓住每一個個性我進去嗎？如果我設置'if（textbox.Text ==「＃」'，它必須是整個字符串是「＃」，而不是字符 – YWah

@YWah：'TextInput'事件大致（非常粗略）類似於Winforms 'KeyPress'事件，通常情況下，字符串實際上只是一個字符，它是一個字符串，因爲一些輸入方法實際上可以生成多字符輸入，但大多數不會。像'e.Text ==「＃」'而不是'e.Key == Key.D3 &&（e.Modifiers＆ModifierKeys.Shift）！= 0'。但是這對我來說並不是問題。 –

如何在組合鍵的用戶界面中按下顯示按鈕

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