basicoutlookbarui.java

一个demo是关于swing

    tabPane.remove(button);
    buttonToTab.remove(button);
    tabToButton.remove(removedTab);
  }

  /**
   * Called whenever a property of a tab is changed
   * 
   * @param index
   */
  protected void updateTabButtonAt(int index) {
    TabButton button = buttonForTab(index);
    button.setText(tabPane.getTitleAt(index));
    button.setIcon(tabPane.getIconAt(index));
    button.setDisabledIcon(tabPane.getDisabledIconAt(index));
    //    button.setBackground(tab.getBackgroundAt(index));
    //    button.setForeground(tab.getForegroundAt(index));
    button.setToolTipText(tabPane.getToolTipTextAt(index));
    button
      .setDisplayedMnemonicIndex(tabPane.getDisplayedMnemonicIndexAt(index));
    button.setMnemonic(tabPane.getMnemonicAt(index));
    button.setEnabled(tabPane.isEnabledAt(index));
    button.setHorizontalAlignment(((JOutlookBar)tabPane).getAlignmentAt(index));
  }

  protected TabButton buttonForTab(int index) {
    Component component = tabPane.getComponentAt(index);
    return (TabButton)tabToButton.get(component);
  }

  class PropertyChangeHandler implements PropertyChangeListener {
    public void propertyChange(PropertyChangeEvent e) {
      //JTabbedPane pane = (JTabbedPane)e.getSource();
      String name = e.getPropertyName();
      if ("tabPropertyChangedAtIndex".equals(name)) {
        int index = ((Integer)e.getNewValue()).intValue();
        updateTabButtonAt(index);
      } else if ("tabPlacement".equals(name)) {
        updateTabLayoutOrientation();
      }
    }
  }

  protected void updateTabLayoutOrientation() {
    TabLayout layout = (TabLayout)tabPane.getLayout();
    int placement = tabPane.getTabPlacement();
    if (placement == JTabbedPane.TOP || placement == JTabbedPane.BOTTOM) {
      layout.setOrientation(PercentLayout.HORIZONTAL);
    } else {
      layout.setOrientation(PercentLayout.VERTICAL);
    }
  }

  /**
   * Manages tabs being added or removed
   */
  class ContainerTabHandler extends ContainerAdapter {

    public void componentAdded(ContainerEvent e) {
      if (!(e.getChild() instanceof UIResource)) {
        Component newTab = e.getChild();
        tabAdded(newTab);
      }
    }

    public void componentRemoved(ContainerEvent e) {
      if (!(e.getChild() instanceof UIResource)) {
        Component oldTab = e.getChild();
        tabRemoved(oldTab);
      }
    }
  }

  /**
   * Layout for the tabs, buttons get preferred size, tabs get all
   */
  protected class TabLayout extends PercentLayout {
    public void addLayoutComponent(Component component, Object constraints) {
      if (constraints == null) {
        if (component instanceof TabButton) {
          super.addLayoutComponent(component, "");
        } else {
          super.addLayoutComponent(component, "100%");
        }
      } else {
        super.addLayoutComponent(component, constraints);
      }
    }
    public void setLayoutConstraints(Container parent) {
      Component[] components = parent.getComponents();
      for (int i = 0, c = components.length; i < c; i++) {
        if (!(components[i] instanceof TabButton)) {
          super.addLayoutComponent(components[i], "100%");
        }
      }
    }
    public void layoutContainer(Container parent) {
      int selectedIndex = tabPane.getSelectedIndex();
      Component visibleComponent = getVisibleComponent();

      if (selectedIndex < 0) {
        if (visibleComponent != null) {
          // The last tab was removed, so remove the component
          setVisibleComponent(null);
        }
      } else {
        Component selectedComponent = tabPane.getComponentAt(selectedIndex);
        boolean shouldChangeFocus = false;

        // In order to allow programs to use a single component
        // as the display for multiple tabs, we will not change
        // the visible compnent if the currently selected tab
        // has a null component. This is a bit dicey, as we don't
        // explicitly state we support this in the spec, but since
        // programs are now depending on this, we're making it work.
        //
        if (selectedComponent != null) {
          if (selectedComponent != visibleComponent && visibleComponent != null) {
            if (SwingUtilities.findFocusOwner(visibleComponent) != null) {
              shouldChangeFocus = true;
            }
          }
          setVisibleComponent(selectedComponent);

          // make sure only the selected component is visible
          Component[] components = parent.getComponents();
          for (int i = 0; i < components.length; i++) {
            if (!(components[i] instanceof UIResource)
              && components[i].isVisible()
              && components[i] != selectedComponent) {
              components[i].setVisible(false);
            }
          }
          
          if (BasicOutlookBarUI.this.nextVisibleComponent != null) {
            BasicOutlookBarUI.this.nextVisibleComponent.setVisible(true);
          }
        }

        super.layoutContainer(parent);

        if (shouldChangeFocus) {
          if (!requestFocusForVisibleComponent0()) {
            tabPane.requestFocus();
          }
        }
      }
    }
  }

  // PENDING(fred) JDK 1.5 may have this method from superclass
  protected boolean requestFocusForVisibleComponent0() {
    Component visibleComponent = getVisibleComponent();
    if (visibleComponent.isFocusTraversable()) {
      visibleComponent.requestFocus();
      return true;
    } else if (visibleComponent instanceof JComponent) {
      if (((JComponent)visibleComponent).requestDefaultFocus()) { return true; }
    }
    return false;
  }

  protected static class TabButton extends JButton implements UIResource {
    public TabButton() {}
    public TabButton(ButtonUI ui) {
      setUI(ui);
    }
  }

  //
  //
  //

  /**
   * Overriden to return an empty adapter, the default listener was
   * just implementing the tab selection mechanism
   */
  protected MouseListener createMouseListener() {
    return new MouseAdapter() {};
  }

  /**
   * Wraps any component in a Scrollable JPanel so it can work
   * correctly within a viewport
   */
  private static class ScrollableJPanel extends JPanel implements Scrollable {
    public ScrollableJPanel(Component component) {
      setLayout(new BorderLayout(0, 0));
      add("Center", component);
      setOpaque(false);
    }
    public int getScrollableUnitIncrement(Rectangle visibleRect,
      int orientation, int direction) {
      return 16;
    }
    public Dimension getPreferredScrollableViewportSize() {
      return (super.getPreferredSize());
    }
    public int getScrollableBlockIncrement(Rectangle visibleRect,
      int orientation, int direction) {
      return 16;
    }
    public boolean getScrollableTracksViewportWidth() {
      return true;
    }
    public boolean getScrollableTracksViewportHeight() {
      return false;
    }
  }

  //
  // Override all paint methods of the BasicTabbedPaneUI to do nothing
  //

  public void paint(Graphics g, JComponent c) {}
  protected void paintContentBorder(Graphics g, int tabPlacement,
    int selectedIndex) {}
  protected void paintContentBorderBottomEdge(Graphics g, int tabPlacement,
    int selectedIndex, int x, int y, int w, int h) {}
  protected void paintContentBorderLeftEdge(Graphics g, int tabPlacement,
    int selectedIndex, int x, int y, int w, int h) {}
  protected void paintContentBorderRightEdge(Graphics g, int tabPlacement,
    int selectedIndex, int x, int y, int w, int h) {}
  protected void paintContentBorderTopEdge(Graphics g, int tabPlacement,
    int selectedIndex, int x, int y, int w, int h) {}
  protected void paintFocusIndicator(Graphics g, int tabPlacement,
    Rectangle[] rects, int tabIndex, Rectangle iconRect, Rectangle textRect,
    boolean isSelected) {}
  protected void paintIcon(Graphics g, int tabPlacement, int tabIndex,
    Icon icon, Rectangle iconRect, boolean isSelected) {}
  protected void paintTab(Graphics g, int tabPlacement, Rectangle[] rects,
    int tabIndex, Rectangle iconRect, Rectangle textRect) {}
  protected void paintTabArea(Graphics g, int tabPlacement, int selectedIndex) {}
  protected void paintTabBackground(Graphics g, int tabPlacement, int tabIndex,
    int x, int y, int w, int h, boolean isSelected) {}
  protected void paintTabBorder(Graphics g, int tabPlacement, int tabIndex,
    int x, int y, int w, int h, boolean isSelected) {}
  protected void paintText(Graphics g, int tabPlacement, Font font,
    FontMetrics metrics, int tabIndex, String title, Rectangle textRect,
    boolean isSelected) {}
}