Keypressed em tela com JButton

rodrigo_flausino:
Ae, pessoal, blz!
Eu tentei implementar um keypressed, e ele funciona numa tela sem botões. Mas se eu tenho algum botão na tela, o keypressed nem é usado.

Alguém já passou por este problema e conseguiu solucionar?

Obrigado.

Olá !
Creio que com este exemplo,vc pode solucionar seu problema.

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;

import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.KeyStroke;

public class KeyTester {
  static class MyActionListener extends AbstractAction {
    MyActionListener(String s) {
      super(s);
    }

    public void actionPerformed(ActionEvent e) {
      System.out.println(getValue(Action.NAME));
    }
  }

  public static void main(String args[]) {
    String actionKey = "theAction";
    JFrame f = new JFrame("Key Tester");
    JButton jb1 = new JButton("<html><center>B<br>Focused/Typed");
    JButton jb2 = new JButton("<html><center>Ctrl-C<br>Window/Pressed");
    JButton jb3 = new JButton("<html><center>Shift-D<br>Ancestor/Released");
    Container pane = f.getContentPane();
    pane.add(jb1, BorderLayout.NORTH);
    pane.add(jb2, BorderLayout.CENTER);
    pane.add(jb3, BorderLayout.SOUTH);

    KeyStroke stroke = KeyStroke.getKeyStroke("typed B");
    Action action = new MyActionListener("Action Happened");
    // Defaults to JComponent.WHEN_FOCUSED map
    InputMap inputMap = jb1.getInputMap();
    inputMap.put(stroke, actionKey);
    ActionMap actionMap = jb1.getActionMap();
    actionMap.put(actionKey, action);

    stroke = KeyStroke.getKeyStroke("ctrl C");
    action = new MyActionListener("Action Didn't Happen");
    inputMap = jb2.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
    inputMap.put(stroke, actionKey);
    actionMap = jb2.getActionMap();
    actionMap.put(actionKey, action);

    stroke = KeyStroke.getKeyStroke("shift released D");
    action = new MyActionListener("What Happened?");
    inputMap = jb3
        .getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
    inputMap.put(stroke, actionKey);
    actionMap = jb3.getActionMap();
    actionMap.put(actionKey, action);

    f.setSize(200, 200);
    f.show();
  }
}

Um abraço !

1 Resposta

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