Exemple #1
0
    // implemented for ActionListener event handling
    public void actionPerformed(ActionEvent e) {
      String actionCmd = e.getActionCommand();
      Stack locStack = parentBrowserFrame.locationStack;
      Stack fwdStack = parentBrowserFrame.forwardStack;

      if (actionCmd.equals(homeCmd)) // event from home button
      {
        fwdStack.removeAllElements();
        parentBrowserFrame.setBrowserLocation(mainBrowserURL);
      } else if (actionCmd.equals(backCmd)) // event from back button
      {
        if (!locStack.isEmpty()) {
          String myLocale = (String) (locStack.pop());

          // push current location on forward stack
          fwdStack.push(location);
          getForwardButton().setEnabled(true);

          // do *not* cache the last location in the stack
          parentBrowserFrame.setBrowserLocation(myLocale, false);
        }
      } else if (actionCmd.equals(forwardCmd)) // event from forward button
      {
        if (!fwdStack.isEmpty()) {
          // remove location from forward stack
          String newLoc = (String) (fwdStack.pop());

          // DO add the current location to the back stack
          parentBrowserFrame.setBrowserLocation(newLoc);
        }
      } else if (actionCmd.equals(comboCmd)) // event from URL combo box!
      {
        if (e.getSource() instanceof JComboBox) // just to be sure
        {
          JComboBox thisBox = (JComboBox) e.getSource();

          String newLoc = thisBox.getSelectedItem().toString();
          if (newLoc != null && !newLoc.equals("")) // ignore empty selections
          {
            if (thisBox.getSelectedIndex() == -1) {
              thisBox.insertItemAt(newLoc, 0);
            }
            fwdStack.removeAllElements();
            parentBrowserFrame.setBrowserLocation(newLoc);
          }
        }
      }

      // disable the back button if we find the location stack is empty
      if (locStack.isEmpty()) {
        getBackButton().setEnabled(false);
      }

      // disable forward button if forward stack is empty
      if (fwdStack.isEmpty()) {
        getForwardButton().setEnabled(false);
      }
    }
Exemple #2
0
    protected void addMyControls() {
      // add browser-style control buttons
      JButton home = new JButton(new ImageIcon("data/Home24.gif"));
      JButton back = new JButton(new ImageIcon("data/Back24.gif"));
      JButton fwd = new JButton(new ImageIcon("data/Forward24.gif"));

      home.setToolTipText("Home");
      home.addActionListener(this);
      home.setActionCommand(homeCmd);

      back.setToolTipText("Back");
      back.addActionListener(this);
      back.setActionCommand(backCmd);
      back.setEnabled(false); // initially disabled

      fwd.setToolTipText("Forward");
      fwd.addActionListener(this);
      fwd.setActionCommand(forwardCmd);
      fwd.setEnabled(false); // initially disabled

      add(home);
      add(back);
      add(fwd);
      add(new JToolBar.Separator());

      // set built-in index variables
      homeIndex = getComponentIndex(home);
      backIndex = getComponentIndex(back);
      forwardIndex = getComponentIndex(fwd);

      JComboBox comboBox = new JComboBox();
      comboBox.setEditable(true);
      comboBox.addActionListener(this);
      comboBox.setActionCommand(comboCmd);
      comboBox.setMaximumRowCount(3); // don't let it get too long
      comboBox.insertItemAt(mainBrowserURL, 0); // don't start it out empty

      add(comboBox);

      comboBoxIndex = getComponentIndex(comboBox);
    }