C1ComboBox Cut

C1ComboBox Cut

Posted by: patrick.muellner on 12 April 2023, 6:15 am EST

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  patrick.muellner

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  Posted 12 April 2023, 6:15 am EST

  Hi,
  
  how can I enabled that the user can cut the text from the ComboBox?
  
  Regards

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  nitin.sharma

  

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  Posted 12 April 2023, 4:28 pm EST - Updated 12 April 2023, 4:33 pm EST

  Hi Patrick,

  C1ComboBox has TextBox in its template and we can easily cut the text from it. Please refer the attached gif for the same:
  
  

  Please refer the sample too: ComboBoxSample.zip

  If you have a different requirement or we understood it wrong, then please explain in detail for your requirement. We’ll be happy to resolve your issue.

  Regards,
  
  Nitin

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  patrick.muellner

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  Posted 12 April 2023, 8:38 pm EST

  Hi,

  sorry - but if I click the right mouse button I can cut the whole text.

  Regards

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  nitin.sharma

  

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  Posted 13 April 2023, 5:12 pm EST

  Hi Patrick,

  Are you able to achieve your requirement? If not then, please describe your requirement in detail. So, that we can assist you accordingly.

  Or if you have another issue related to this thread, then you can ask here. Or you can generate a new forum thread.

  Regards,
  
  Nitin

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  patrick.muellner

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  Posted 13 April 2023, 5:48 pm EST

  HI,

  I include you a video.
  
  On the ComboBox IsEditable is set to “False”. But if I do a mouse right click I can cut the text. But this shouldn’t be able.
  
  Regards

  bandicam 2023-04-14 08-46-59-275.zip

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  nitin.sharma

  

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  Posted 13 April 2023, 11:07 pm EST

  Hi Patrick,

  Apologize for any inconvenience.

  JFYI, We have TextBox in our C1ComboBox template. And the ContextMenu appears after right-click is the default context menu for that TextBox, which is not linked with the C1ComboBox i.e., we didn’t added this context-menu to the ComboBox this is the default one.
  
  You can also check with only TextBox. The same ContextMenu will appear after right-click.

  To achieve your requirement, you can create a custom ContextMenu for TextBox under C1ComboBox by handling Loaded event of C1ComboBox as:

  private void ComboBox_Loaded(object sender, RoutedEventArgs e)
  {
      var comboHeader = cmb.Template.FindName("ComboHeader", cmb) as C1TextEditableContentControl;
      var textBox = comboHeader.Template.FindName("EditControl", comboHeader) as C1TextBoxBase;
      textBox.ContextMenu = CustomContextMenu(textBox);
  
  }
  
  private ContextMenu CustomContextMenu(C1TextBoxBase textBox)
  {
      var contextMenu = new ContextMenu();
  
      //Cut
      var cutMenu = new MenuItem() { Header = "Cut" };
      cutMenu.Click += (s1, e1) =>
      {
          Clipboard.SetText(textBox.SelectedText);
          textBox.SelectedText = "";
      };
      contextMenu.Items.Add(cutMenu);
  
      //Copy
      var copyMenu = new MenuItem() { Header = "Copy" };
      copyMenu.Click += (s1, e1) =>
      {
          Clipboard.SetText(textBox.SelectedText);
      };
      contextMenu.Items.Add(copyMenu);
  
      //Paste
      var pasteMenu = new MenuItem() { Header = "Paste" };
      pasteMenu.Click += (s1, e1) =>
      {
          textBox.SelectedText = Clipboard.GetText();
      };
      contextMenu.Items.Add(pasteMenu);
  
      //Disabled Menu
      contextMenu.Opened += (s1, e1) =>
      {
          if (cmb.IsEditable == false | textBox.SelectedText.Length == 0)
              cutMenu.IsEnabled = false;
      };
  
      return contextMenu;
  }
  

  Please refer the attached sample for the same: ComboBoxSample_Mod.zip

  Best regards,
  
  Nitin

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  patrick.muellner

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  Posted 16 April 2023, 5:09 pm EST

  Hi,

  thanks for the code.
  
  One problem still exists. If I want to cut with the keyboard it still works.
  
  How can I solve this problem?

  Regards

• 

  nitin.sharma

  

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  Posted 16 April 2023, 6:32 pm EST

  Hi Patrick,

  Thanks for reaching out to us again.

  You can disable Cut from keyboard if IsEditable=false, by handling PreviewKeyDown as:

  cmb.PreviewKeyDown += (s, e) =>
              {
                  if(!cmb.IsEditable)
                  {
                      if (e.Key == Key.Back)
                          e.Handled = true;
                      if (e.KeyboardDevice.Modifiers == ModifierKeys.Control & e.Key == Key.X)
                          e.Handled = true;
                  }                
              };

  Please refer the attached modified sample: ComboBoxSample_Mod2.zip

  Best Regards,
  
  Nitin