repaintmanager.java

来自「Mac OS X 10.4.9 for x86 Source Code gcc」· Java 代码 · 共 543 行 · 第 1/2 页

      {
        repaintWorker.setLive(true);
        SwingUtilities.invokeLater(repaintWorker);
      }
  }

  /**
   * Remove a component from the {@link #invalidComponents} vector.
   *
   * @param component The component to remove
   *
   * @see #addInvalidComponent
   */
  public synchronized void removeInvalidComponent(JComponent component)
  {
    invalidComponents.removeElement(component);
  }

  /**
   * Add a region to the set of dirty regions for a specified component.
   * This involves union'ing the new region with any existing dirty region
   * associated with the component. If the {@link #repaintWorker} class
   * is not active, insert it in the system event queue.
   *
   * @param component The component to add a dirty region for
   * @param x The left x coordinate of the new dirty region
   * @param y The top y coordinate of the new dirty region
   * @param w The width of the new dirty region
   * @param h The height of the new dirty region
   *
   * @see #addDirtyRegion
   * @see #getDirtyRegion
   * @see #isCompletelyDirty
   * @see #markCompletelyClean
   * @see #markCompletelyDirty
   */
  public synchronized void addDirtyRegion(JComponent component, int x, int y,
                                          int w, int h)
  {
    if (w == 0 || h == 0)
      return;

    Rectangle r = new Rectangle(x, y, w, h);
    if (dirtyComponents.containsKey(component))
      r = r.union((Rectangle)dirtyComponents.get(component));
    dirtyComponents.put(component, r);
    if (! repaintWorker.isLive())
      {
        repaintWorker.setLive(true);
        SwingUtilities.invokeLater(repaintWorker);
      }
  }
  
  /**
   * Get the dirty region associated with a component, or <code>null</code>
   * if the component has no dirty region.
   *
   * @param component The component to get the dirty region of
   *
   * @return The dirty region of the component
   *
   * @see #dirtyComponents
   * @see #addDirtyRegion
   * @see #isCompletelyDirty
   * @see #markCompletelyClean
   * @see #markCompletelyDirty
   */
  public Rectangle getDirtyRegion(JComponent component)
  {
    return (Rectangle) dirtyComponents.get(component);
  }
  
  /**
   * Mark a component as dirty over its entire bounds.
   *
   * @param component The component to mark as dirty
   *
   * @see #dirtyComponents
   * @see #addDirtyRegion
   * @see #getDirtyRegion
   * @see #isCompletelyDirty
   * @see #markCompletelyClean
   */
  public void markCompletelyDirty(JComponent component)
  {
    Rectangle r = component.getBounds();
    addDirtyRegion(component, r.x, r.y, r.width, r.height);
  }

  /**
   * Remove all dirty regions for a specified component
   *
   * @param component The component to mark as clean
   *
   * @see #dirtyComponents
   * @see #addDirtyRegion
   * @see #getDirtyRegion
   * @see #isCompletelyDirty
   * @see #markCompletelyDirty
   */
  public void markCompletelyClean(JComponent component)
  {
    dirtyComponents.remove(component);
  }

  /**
   * Return <code>true</code> if the specified component is completely
   * contained within its dirty region, otherwise <code>false</code>
   *
   * @param component The component to check for complete dirtyness
   *
   * @return Whether the component is completely dirty
   *
   * @see #dirtyComponents
   * @see #addDirtyRegion
   * @see #getDirtyRegion
   * @see #isCompletelyDirty
   * @see #markCompletelyClean
   */
  public boolean isCompletelyDirty(JComponent component)
  {
    Rectangle dirty = (Rectangle) dirtyComponents.get(component);
    if (dirty == null)
      return false;
    Rectangle r = component.getBounds();
    if (r == null)
      return true;
    return dirty.contains(r);
  }

  /**
   * Validate all components which have been marked invalid in the {@link
   * #invalidComponents} vector.
   */
  public void validateInvalidComponents()
  {
    for (Enumeration e = invalidComponents.elements(); e.hasMoreElements(); )
      {
        JComponent comp = (JComponent) e.nextElement();
        if (! (comp.isVisible() && comp.isShowing()))
          continue;
        comp.validate();
      }
    invalidComponents.clear();
  }

  /**
   * Repaint all regions of all components which have been marked dirty in
   * the {@link #dirtyComponents} table.
   */
  public void paintDirtyRegions()
  {
    // step 1: pull out roots and calculate spanning damage

    HashMap roots = new HashMap();
    for (Enumeration e = dirtyComponents.keys(); e.hasMoreElements(); )
      {
        JComponent comp = (JComponent) e.nextElement();
        if (! (comp.isVisible() && comp.isShowing()))
          continue;
        Rectangle damaged = getDirtyRegion(comp);
        if (damaged.width == 0 || damaged.height == 0)
          continue;
        JRootPane root = comp.getRootPane();
        // If the component has no root, no repainting will occur.
        if (root == null)
          continue;
        Rectangle rootDamage = SwingUtilities.convertRectangle(comp, damaged, root);
        if (! roots.containsKey(root))
          {
            roots.put(root, rootDamage);
          }
        else
          {
            roots.put(root, ((Rectangle)roots.get(root)).union(rootDamage));
          }
      }
    dirtyComponents.clear();

    // step 2: paint those roots
    Iterator i = roots.entrySet().iterator();
    while(i.hasNext())
      {
        Map.Entry ent = (Map.Entry) i.next();
        JRootPane root = (JRootPane) ent.getKey();
        Rectangle rect = (Rectangle) ent.getValue();
        root.paintImmediately(rect);                	
      }
  }

  /**
   * Get an offscreen buffer for painting a component's image. This image
   * may be smaller than the proposed dimensions, depending on the value of
   * the {@link #doubleBufferMaximumSize} property.
   *
   * @param component The component to return an offscreen buffer for
   * @param proposedWidth The proposed width of the offscreen buffer
   * @param proposedHeight The proposed height of the offscreen buffer
   *
   * @return A shared offscreen buffer for painting
   *
   * @see #doubleBuffer
   */
  public Image getOffscreenBuffer(Component component, int proposedWidth,
                                  int proposedHeight)
  {
    if (doubleBuffer == null 
        || (((doubleBuffer.getWidth(null) < proposedWidth) 
             || (doubleBuffer.getHeight(null) < proposedHeight))
            && (proposedWidth < doubleBufferMaximumSize.width)
            && (proposedHeight < doubleBufferMaximumSize.height)))
      {
        doubleBuffer = component.createImage(proposedWidth, proposedHeight);
      }
    return doubleBuffer;
  }

  /**
   * Get the value of the {@link #doubleBufferMaximumSize} property.
   *
   * @return The current value of the property
   *
   * @see #setDoubleBufferMaximumSize
   */
  public Dimension getDoubleBufferMaximumSize()
  {
    return doubleBufferMaximumSize;
  }

  /**
   * Set the value of the {@link #doubleBufferMaximumSize} property.
   *
   * @param size The new value of the property
   *
   * @see #getDoubleBufferMaximumSize
   */
  public void setDoubleBufferMaximumSize(Dimension size)
  {
    doubleBufferMaximumSize = size;
  }

  /**
   * Set the value of the {@link #doubleBufferingEnabled} property.
   *
   * @param buffer The new value of the property
   *
   * @see #getDoubleBufferingEnabled
   */
  public void setDoubleBufferingEnabled(boolean buffer)
  {
    doubleBufferingEnabled = buffer;
  }

  /**
   * Get the value of the {@link #doubleBufferingEnabled} property.
   *
   * @return The current value of the property
   *
   * @see #setDoubleBufferingEnabled
   */
  public boolean isDoubleBufferingEnabled()
  {
    return doubleBufferingEnabled;
  }
  
  public String toString()
  {
    return "RepaintManager";
  }
}