Examples of charva.awt.EventQueue

charva.awt.EventQueue
The EventQueue class queues "AWT" events, which are used to trigger drawing actions. They can be enqueued using the postEvent() method by any thread (e.g the keyboard reading thread enqueues KeyEvents), but only the event-dispatching thread should call getNextEvent(), because only the event-dispatching thread should do any drawing. This is because the ncurses library is not re-entrant.
SyncEvents are enqueued with a lower priority than other events, and if multiple SyncEvents are found on the queue they are coalesced into a single SyncEvent.

  // It seems reasonable to assume that the "current row" should
  // be set to the index that is being made visible.
  _currentRow = index_;


  Toolkit term = Toolkit.getDefaultToolkit();
  EventQueue evtqueue = term.getSystemEventQueue();


  // First scroll the list DOWN so that index 0 is visible.
  evtqueue.postEvent(
          new ScrollEvent(this, ScrollEvent.DOWN, 
    new Point(0, 0)));


  // Then (if necessary) scroll it UP so that the specified index
  // is not below the bottom of the viewport.
  evtqueue.postEvent(
          new ScrollEvent(this, ScrollEvent.UP, 
    new Point(0, index_)));
    }

View Full Code Here

   */
  if (ke_.isConsumed())
      return;


  Toolkit term = Toolkit.getDefaultToolkit();
  EventQueue evtqueue = term.getSystemEventQueue();
  int key = ke_.getKeyCode();
  switch (key) {
      case '\t':
    getParent().nextFocus();
    return;


      case KeyEvent.VK_BACK_TAB:
    getParent().previousFocus();
    return;


      case KeyEvent.VK_DOWN:
    /* If we are already at the bottom of the list, ignore
     * this keystroke.
     */
    if (_currentRow >= _listModel.getSize() -1)
        return;


    evtqueue.postEvent(
        new ScrollEvent(this, ScrollEvent.UP, 
      new Point(0, ++_currentRow)));
    break;


      case KeyEvent.VK_PAGE_DOWN:
    _currentRow += _visibleRows;
    if (_currentRow >= _listModel.getSize())
        _currentRow = _listModel.getSize() -1;


    evtqueue.postEvent(
        new ScrollEvent(this, ScrollEvent.UP, 
      new Point(0, _currentRow)));
    break;


      case KeyEvent.VK_END:
    _currentRow = _listModel.getSize() - 1;
    evtqueue.postEvent(new ScrollEvent(
            this, ScrollEvent.UP, new Point(0, _currentRow)));
    break;


      case KeyEvent.VK_UP:
    /* If we are already at the top of the list, ignore
     * this keystroke.
     */
    if (_currentRow < 1)
        return;


    evtqueue.postEvent(new ScrollEvent(
            this, ScrollEvent.DOWN, new Point(0, --_currentRow)));
    break;


      case KeyEvent.VK_PAGE_UP:
    _currentRow -= _visibleRows;
    if (_currentRow < 0)
        _currentRow = 0;


    evtqueue.postEvent(new ScrollEvent(this, ScrollEvent.DOWN, 
      new Point(0, _currentRow)));
    break;


      case KeyEvent.VK_ENTER:
    _doSelect();

View Full Code Here

    public void valueChanged(ListSelectionEvent e_) {
  _popup.hide();


  /* Put an ActionEvent onto the system event queue.
   */
  EventQueue evtqueue = 
    Toolkit.getDefaultToolkit().getSystemEventQueue();


  Object selectedItem = _popup.getSelectedItem();
  if (selectedItem != null)
      _model.setSelectedItem(selectedItem);


  evtqueue.postEvent(new ActionEvent(
      this, _model.getSelectedItem().toString()));
    }

View Full Code Here

        return;
    }
    super.setSelected( ! super.isSelected());


    // post an ItemEvent
    EventQueue queue = term.getSystemEventQueue();
    int state = (super.isSelected()) ?
      ItemEvent.SELECTED :
      ItemEvent.DESELECTED;
    queue.postEvent(new ItemEvent(this, this, state));
    break;
  }


  draw(Toolkit.getDefaultToolkit());
  requestFocus();

View Full Code Here

  /* Post an ItemEvent if ENTER was pressed (but only if the 
   * button is not disabled). 
   */
  if (super.isEnabled() && (key == KeyEvent.VK_ENTER)) {


      EventQueue queue = Toolkit.getDefaultToolkit().getSystemEventQueue();
      queue.postEvent(new ItemEvent(this, this, ItemEvent.SELECTED));
  }
    }

View Full Code Here

        return;  
    }
    super.setSelected(true);


    // post an ItemEvent.
    EventQueue queue = term.getSystemEventQueue();
    queue.postEvent(new ItemEvent(this, this, ItemEvent.SELECTED));
    break;
  }


  draw(Toolkit.getDefaultToolkit());
  requestFocus();

View Full Code Here

   */
  if (ke_.isConsumed())
      return;


  Toolkit term = Toolkit.getDefaultToolkit();
  EventQueue evtqueue = term.getSystemEventQueue();
  int key = ke_.getKeyCode();
  if (key == '\t') {
      getParent().nextFocus();
      return;
  }
  else if (key == KeyEvent.VK_BACK_TAB) {
      getParent().previousFocus();
      return;
  }
  else if (key == KeyEvent.VK_UP) {
      if (_currentRow == 0)
    term.beep();
      else {
    _currentRow--;
    int x=0;
    for (int i=0; i<_currentColumn; i++)
        x += getColumnWidth(i) + 1;
    evtqueue.postEvent(
        new ScrollEvent(this, ScrollEvent.DOWN, 
      new Point(x, _currentRow+1)));
      }
  }
  else if (key == KeyEvent.VK_DOWN) {
      if (_currentRow == _model.getRowCount() - 1)
    term.beep();
      else {
    _currentRow++;
    int x=0;
    for (int i=0; i<_currentColumn; i++)
        x += getColumnWidth(i) + 1;
    evtqueue.postEvent(
        new ScrollEvent(this, ScrollEvent.UP, 
      new Point(x, _currentRow+2)));
      }
  }
  else if (key == KeyEvent.VK_LEFT) {
      if (_currentColumn == 0)
    term.beep();
      else {
    _currentColumn--;
    int x=0;
    for (int i=0; i<_currentColumn; i++)
        x += getColumnWidth(i) + 1;
    evtqueue.postEvent(
        new ScrollEvent(this, ScrollEvent.RIGHT, 
      new Point(x, _currentRow)));
      }
  }
  else if (key == KeyEvent.VK_RIGHT) {
      if (_currentColumn == _model.getColumnCount() - 1)
    term.beep();
      else {
    _currentColumn++;
    int x=0;
    for (int i=0; i<=_currentColumn; i++)
        x += getColumnWidth(i) + 1;
    evtqueue.postEvent( 
        new ScrollEvent(this, ScrollEvent.LEFT, 
      new Point(x, _currentRow)));
      }
  }
  else if (key == KeyEvent.VK_HOME) {
      int x=0;
      for (int i=0; i<_currentColumn; i++)
    x += getColumnWidth(i) + 1;
      evtqueue.postEvent( 
        new ScrollEvent(this, ScrollEvent.RIGHT, 
      new Point(x, _currentRow)));
  }
  else if (key == KeyEvent.VK_END) {
      int x=0;
      for (int i=0; i<=_currentColumn; i++)
    x += getColumnWidth(i) + 1;
      evtqueue.postEvent( 
        new ScrollEvent(this, ScrollEvent.LEFT, 
      new Point(x, _currentRow)));
  }
  else if (key == KeyEvent.VK_ENTER) {
      if (getColumnSelectionAllowed())

View Full Code Here

      KeyEvent key_event = (KeyEvent) evt_;
      if (( ! key_event.isConsumed()) &&
    key_event.getKeyCode() == KeyEvent.VK_ENTER &&
    super.isEnabled()) {
    
    EventQueue queue = Toolkit.getDefaultToolkit().getSystemEventQueue();
    queue.postEvent(new ActionEvent(this, getActionCommand()));
    key_event.consume();
      }
  }
  else if (evt_ instanceof ActionEvent)
      fireActionPerformed((ActionEvent) evt_);

View Full Code Here

        }


        private class MyList extends JList {
            @Override
            public void processKeyEvent(KeyEvent ke) {
                EventQueue evtqueue = Toolkit.getDefaultToolkit().getSystemEventQueue();
                int keyCode = ke.getKeyCode();
                if (keyCode == KeyEvent.VK_ENTER) {
                    Object sel = ((ListDataEntry) list.getSelectedValue()).name;
                    String s;
                    String n = null;
                    if ("..".equals(sel)) {
                        File file = new File(path);
                        n = file.getName();
                        s = file.getParentFile().getAbsolutePath();
                    } else {
                        String sels = String.valueOf(sel);
                        s = new File(path, sels.substring(1, sels.length())).getAbsolutePath();
                    }
                    int sri = setData(s, "/" + n);
                    int dir = _currentRow < sri ? ScrollEvent.UP : ScrollEvent.DOWN;
                    if (sri > -1)
                        _currentRow = sri;
                    setSelectedIndex(_currentRow);
                    evtqueue.postEvent(new ScrollEvent(this, dir, new Point(0, _currentRow)));
                    ke.consume();
                } else if (keyCode == KeyEvent.VK_HOME) {
                    _currentRow = 0;
                    evtqueue.postEvent(new ScrollEvent(
                        this, ScrollEvent.DOWN, new Point(0, _currentRow)));
                }
                super.processKeyEvent(ke);
                if (keyCode == KeyEvent.VK_UP ||
                    keyCode == KeyEvent.VK_DOWN ||

View Full Code Here

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charva.awt.event.InvocationEvent

charvax.swing.AbstractButton

charvax.swing.JButton

charvax.swing.JCheckBox

charvax.swing.JComboBox

charvax.swing.JList

charvax.swing.JRadioButton

charvax.swing.JTable

org.jnode.apps.commander.CharvaCommander$Pane$MyList

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