CheckBoxListComboBox with custom keystroke

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CheckBoxListComboBox with custom keystroke

Postby td84 » Wed Sep 07, 2016 7:54 am

Hello,

i'm trying to extend the class CheckBoxListComboBox, so if someone opens the list and presses CTRL+A, then all of the items in the list gets selected:
i mean all of the items will have a blue background and all of the checkboxes gets selected like on the picture.
The functionality with the whitespace should not change: after pressing CTRL+A pressing the whitespace should select/deselect all of the items.

My try was the following code fragment, but this doesn't even reacts to CTRL+A:

Code: Select all
      String[] _content = new String[]{"One", "Two", "Three", "Four", "Five"};
      Action action = new AbstractAction("selectall") {
         private static final long serialVersionUID = 1L;
         
         @Override public void actionPerformed(ActionEvent evt) {
            System.out.format("\n-->CBoxListComboBox: selecting all...\n");
            setSelectedObjects(_content);
          }
      };
      
      String key = "select_all";
      this.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(KeyStroke.getKeyStroke(KeyEvent.VK_A,  InputEvent.CTRL_DOWN_MASK), key);
      this.getActionMap().put(key, action);


Can you help me to implement this?

Thanx in advance,
Daniel
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td84
 
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Re: CheckBoxListComboBox with custom keystroke

Postby JIDE Support » Wed Sep 07, 2016 9:20 am

What exactly is the problem? I tried in CheckBoxListExComboBox. I can Ctrl-A to select all items and press SPACE to check all of them.
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Re: CheckBoxListComboBox with custom keystroke

Postby td84 » Wed Sep 07, 2016 1:18 pm

Yes you've right. But what i would like to have is to select AND check all of them by pressing CTRL+A without to pressing the SPACE.
And a subsequent SPACE unchecks all of them.

Thanx,
Daniel
td84
 
Posts: 25
Joined: Tue Dec 08, 2015 4:02 pm

Re: CheckBoxListComboBox with custom keystroke

Postby JIDE Support » Wed Sep 07, 2016 1:28 pm

If you modify the action map on on the CheckBoxList directly, it should work. There is already an entry for Ctrl-A on InputMap so you don't need to change anything. Add an action listener for "selectAll" should be good enough to modify this behavior.
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Re: CheckBoxListComboBox with custom keystroke

Postby td84 » Thu Sep 08, 2016 3:08 am

JIDE Support wrote:If you modify the action map on on the CheckBoxList directly, it should work. There is already an entry for Ctrl-A on InputMap so you don't need to change anything. Add an action listener for "selectAll" should be good enough to modify this behavior.


I wrote the following, but it reacts only to actions, if cmd=comboBoxChanged.
It seems, that InputMap and ActionMap hold no mappings (see System.out.format).

Code: Select all
public class MyCheckBoxListComboBox extends CheckBoxListComboBox {
   private String[] _content;


   public MyCheckBoxListComboBox(String[] content) {
      super(content, String[].class);
      _content = content;
      
      Action action = new AbstractAction("selectall") {
         @Override public void actionPerformed(ActionEvent evt) {
            System.out.format("\n-->CBoxListComboBox:  [%s]\n", evt);
            //only this action is catched here:
            //  [java.awt.event.ActionEvent[ACTION_PERFORMED,cmd=comboBoxChanged,when=1473328412049,modifiers=]
            setSelectedObjects(_content);
          }
      };
      this.addActionListener( action );
      System.out.format("\n-->InputMap - keys:\n[%s]\n\n",  (Object[])this.getInputMap().allKeys());  //no mapping
      System.out.format("\n-->ActionMap - keys:\n[%s]\n\n",  (Object[])this.getActionMap().allKeys()); //no mapping
   }
}


Could you give some hint?

Thank you in advance,
Daniel

EDIT: i tryed also with this.addKeyListener() and to override processKeyEvent() but i can't catch CTRL+A.
td84
 
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Re: CheckBoxListComboBox with custom keystroke

Postby JIDE Support » Thu Sep 08, 2016 8:38 am

I refer to the CheckBoxList, not CheckBoxListExComboBox, which will has the InputMap.
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Re: CheckBoxListComboBox with custom keystroke

Postby td84 » Thu Sep 08, 2016 8:50 am

JIDE Support wrote:I refer to the CheckBoxList, not CheckBoxListExComboBox, which will has the InputMap.


Ok, thanx. But how can i realize this with CheckBoxListExComboBox?
td84
 
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Re: CheckBoxListComboBox with custom keystroke

Postby JIDE Support » Thu Sep 08, 2016 12:23 pm

You can override setupList method on CheckBoxListExComboBox to get access to the CheckBoxList.
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