gtktoolkit.java

gcc的组建

    int max_entries;
    public LRUCache(int max)
    {
      super(max, 0.75f, true);
      max_entries = max;
    }
    protected boolean removeEldestEntry(Map.Entry eldest)
    {
      return size() > max_entries;
    }
  }

  private LRUCache fontCache = new LRUCache(50);
  private LRUCache metricsCache = new LRUCache(50);
  private LRUCache imageCache = new LRUCache(50);

  public FontMetrics getFontMetrics (Font font) 
  {
    synchronized (metricsCache)
      {
        if (metricsCache.containsKey(font))
          return (FontMetrics) metricsCache.get(font);
      }

    FontMetrics m = new GdkFontMetrics (font);
    synchronized (metricsCache)
      {
        metricsCache.put(font, m);
      }
    return m;
  }

  public Image getImage (String filename) 
  {
    if (imageCache.containsKey(filename))
      return (Image) imageCache.get(filename);
    else
      {
        Image im = createImage(filename);
        imageCache.put(filename, im);
        return im;
      }
  }

  public Image getImage (URL url) 
  {
    if (imageCache.containsKey(url))
      return (Image) imageCache.get(url);
    else
      {
        Image im = createImage(url);
        imageCache.put(url, im);
        return im;
      }
  }

  public PrintJob getPrintJob (Frame frame, String jobtitle, Properties props) 
  {
    return null;
  }

  public native int getScreenResolution();

  public Dimension getScreenSize ()
  {
    int dim[] = new int[2];
    getScreenSizeDimensions(dim);
    return new Dimension(dim[0], dim[1]);
  }

  public Clipboard getSystemClipboard() 
  {
    SecurityManager secman = System.getSecurityManager();
    if (secman != null)
      secman.checkSystemClipboardAccess();

    return GtkClipboard.getInstance();
  }

  /**
   * Prepares a GtkImage. For every other kind of Image it just
   * assumes the image is already prepared for rendering.
   */
  public boolean prepareImage (Image image, int width, int height, 
			       ImageObserver observer) 
  {
    /* GtkImages are always prepared, as long as they're loaded. */
    if (image instanceof GtkImage)
      return ((((GtkImage)image).checkImage (observer) & 
	       ImageObserver.ALLBITS) != 0);

    /* Assume anything else is too */
    return true;
  }

  public native void sync();

  protected void setComponentState (Component c, GtkComponentPeer cp)
  {
    /* Make the Component reflect Peer defaults */
    if (c.getForeground () == null)
      c.setForeground (cp.getForeground ());
    if (c.getBackground () == null)
      c.setBackground (cp.getBackground ());
    //        if (c.getFont () == null)
    //  	c.setFont (cp.getFont ());
      
    /* Make the Peer reflect the state of the Component */
    if (! (c instanceof Window))
      {
	cp.setCursor (c.getCursor ());
	
	Rectangle bounds = c.getBounds ();
	cp.setBounds (bounds.x, bounds.y, bounds.width, bounds.height);
	cp.setVisible (c.isVisible ());
      }
  }

  protected ButtonPeer createButton (Button b)
  {
    return new GtkButtonPeer (b);
  }

  protected CanvasPeer createCanvas (Canvas c) 
  {
    return new GtkCanvasPeer (c);
  }

  protected CheckboxPeer createCheckbox (Checkbox cb) 
  {
    return new GtkCheckboxPeer (cb);
  }

  protected CheckboxMenuItemPeer createCheckboxMenuItem (CheckboxMenuItem cmi)
  {
    return new GtkCheckboxMenuItemPeer (cmi);
  }

  protected ChoicePeer createChoice (Choice c) 
  {
    return new GtkChoicePeer (c);
  }

  protected DialogPeer createDialog (Dialog d)
  {
    return new GtkDialogPeer (d);
  }

  protected FileDialogPeer createFileDialog (FileDialog fd)
  {
    return new GtkFileDialogPeer (fd);
  }

  protected FramePeer createFrame (Frame f)
  {
    return new GtkFramePeer (f);
  }

  protected LabelPeer createLabel (Label label) 
  {
    return new GtkLabelPeer (label);
  }

  protected ListPeer createList (List list)
  {
    return new GtkListPeer (list);
  }

  protected MenuPeer createMenu (Menu m) 
  {
    return new GtkMenuPeer (m);
  }

  protected MenuBarPeer createMenuBar (MenuBar mb) 
  {
    return new GtkMenuBarPeer (mb);
  }

  protected MenuItemPeer createMenuItem (MenuItem mi) 
  {
    return new GtkMenuItemPeer (mi);
  }

  protected PanelPeer createPanel (Panel p) 
  {
    return new GtkPanelPeer (p);
  }

  protected PopupMenuPeer createPopupMenu (PopupMenu target) 
  {
    return new GtkPopupMenuPeer (target);
  }

  protected ScrollPanePeer createScrollPane (ScrollPane sp) 
  {
    return new GtkScrollPanePeer (sp);
  }

  protected ScrollbarPeer createScrollbar (Scrollbar sb) 
  {
    return new GtkScrollbarPeer (sb);
  }

  protected TextAreaPeer createTextArea (TextArea ta) 
  {
    return new GtkTextAreaPeer (ta);
  }

  protected TextFieldPeer createTextField (TextField tf) 
  {
    return new GtkTextFieldPeer (tf);
  }

  protected WindowPeer createWindow (Window w)
  {
    return new GtkWindowPeer (w);
  }

  public EmbeddedWindowPeer createEmbeddedWindow (EmbeddedWindow w)
  {
    return new GtkEmbeddedWindowPeer (w);
  }

  /** 
   * @deprecated part of the older "logical font" system in earlier AWT
   * implementations. Our newer Font class uses getClasspathFontPeer.
   */
  protected FontPeer getFontPeer (String name, int style) {
    // All fonts get a default size of 12 if size is not specified.
    return getFontPeer(name, style, 12);
  }

  /**
   * Private method that allows size to be set at initialization time.
   */
  private FontPeer getFontPeer (String name, int style, int size) 
  {
    Map attrs = new HashMap ();
    ClasspathFontPeer.copyStyleToAttrs (style, attrs);
    ClasspathFontPeer.copySizeToAttrs (size, attrs);
    return getClasspathFontPeer (name, attrs);
  }

  /**
   * Newer method to produce a peer for a Font object, even though Sun's
   * design claims Font should now be peerless, we do not agree with this
   * model, hence "ClasspathFontPeer". 
   */

  public ClasspathFontPeer getClasspathFontPeer (String name, Map attrs)
  {
    Map keyMap = new HashMap (attrs);
    // We don't know what kind of "name" the user requested (logical, face,
    // family), and we don't actually *need* to know here. The worst case
    // involves failure to consolidate fonts with the same backend in our
    // cache. This is harmless.
    keyMap.put ("GtkToolkit.RequestedFontName", name);
    if (fontCache.containsKey (keyMap))
      return (ClasspathFontPeer) fontCache.get (keyMap);
    else
      {
        ClasspathFontPeer newPeer = new GdkFontPeer (name, attrs);
        fontCache.put (keyMap, newPeer);
        return newPeer;
      }
  }

  public ClasspathTextLayoutPeer getClasspathTextLayoutPeer (AttributedString str, 
                                                             FontRenderContext frc)
  {
    return new GdkTextLayout(str, frc);
  }

  protected EventQueue getSystemEventQueueImpl() 
  {
    synchronized (GtkToolkit.class)
      {
        if (q == null)
          {
            q = new EventQueue();
            GtkGenericPeer.enableQueue (q);
          }
      }    
    return q;
  }

  protected native void loadSystemColors (int[] systemColors);

  public DragSourceContextPeer createDragSourceContextPeer(DragGestureEvent e)
  {
    throw new Error("not implemented");
  }

  public Map mapInputMethodHighlight(InputMethodHighlight highlight)
  {
    throw new Error("not implemented");
  }

  public Rectangle getBounds()
  {
    int[] dims = new int[2];
    getScreenSizeDimensions(dims);
    return new Rectangle(0, 0, dims[0], dims[1]);
  }
  
  // ClasspathToolkit methods

  public GraphicsEnvironment getLocalGraphicsEnvironment()
  {
    return new GdkGraphicsEnvironment();
  }

  public Font createFont(int format, InputStream stream)
  {
    throw new UnsupportedOperationException();
  }

  public RobotPeer createRobot (GraphicsDevice screen) throws AWTException
  {
    return new GdkRobotPeer (screen);
  }

  public void registerImageIOSpis(IIORegistry reg)
  {
    GdkPixbufDecoder.registerSpis(reg);
  }

  public static native void gtkMain();
} // class GtkToolkit