jcomponent.java

来自「纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统」· Java 代码 · 共 1,065 行 · 第 1/2 页

		rv.setLocation(getX(),
		               getY());
		return rv;
	}

	public Dimension getMaximumSize()
	{
		if (max != null)
		{
			//System.out.println("HAVE_MAX_SIZE =  " + max);
			return max;
		}
		if (ui != null)
		{
		    Dimension s = ui.getMaximumSize(this);
		    if (s != null)
			{
				//System.out.println("        UI-MAX = " + s + ", UI = " + ui + ", IM="+this);
				return s;
			}
		}
		Dimension p = super.getMaximumSize();
		//System.out.println("               MAX = " + p + ", COMP="+this);
		return p;
	}

	public Dimension getMinimumSize()
	{
		if (min != null)
		{
			//System.out.println("HAVE_MIN_SIZE =  " + min);
			return min;
		}
		if (ui != null)
		{
			Dimension s = ui.getMinimumSize(this);
			if (s != null)
			{
				//	System.out.println("        UI-MIN = " + s + ", UI = " + ui + ", IM="+this);
				return s;
			}
		}
		Dimension p = super.getMinimumSize();
		//	System.out.println("              MIN = " + p + ", COMP="+this);
		return p;
	}

	public Dimension getPreferredSize()
	{
		if (pref != null)
		{
			//System.out.println("HAVE_PREF_SIZE =  " + pref);
			return pref;
		}

		if (ui != null)
		{
			Dimension s = ui.getPreferredSize(this);
			if (s != null)
			{
				//System.out.println("        UI-PREF = " + s + ", UI = " + ui + ", IM="+this);
				return s;
			}
		}
		Dimension p = super.getPreferredSize();
		//	System.out.println("              PREF = " + p + ", COMP="+this);
		return p;
	}

	public Component getNextFocusableComponent()
	{
		//          Return the next focusable component or null if the focus manager should choose the next focusable component automatically
		return null;
	}


	public KeyStroke[] getRegisteredKeyStrokes()
	{
		//          Return the KeyStrokes that will initiate registered actions.
		return null;
	}

	public JRootPane getRootPane()
	{
		JRootPane p = SwingUtilities.getRootPane(this);
		System.out.println("root = " + p);
		return p;
	}

	public Dimension getSize(Dimension rv)
	{
		//	System.out.println("JComponent, getsize()");
		if (rv == null)
			return new Dimension(getWidth(),
			                     getHeight());
		else
		{
			rv.setSize(getWidth(),
			           getHeight());
			return rv;
		}
	}



	/*********************************************************************
	 *
	 *
	 *  tooltips:
	 *
	 *
	 **************************************/

	public JToolTip createToolTip()
	{
		if (tooltip == null)
			tooltip = new JToolTip(tool_tip_text);
		return tooltip;
	}

	public Point getToolTipLocation(MouseEvent event)
        {	return null;    }

	public void setToolTipText(String text)
	{	tool_tip_text = text;    }

	public String getToolTipText()
	{	return tool_tip_text;    }

	public String getToolTipText(MouseEvent event)
	{	return tool_tip_text;    }

	/*********************************************************************
	 *
	 *
	 *    things to do with visibility:
	 *
	 *
	 **************************************/


	public Container getTopLevelAncestor()
	{
		//      Returns the top-level ancestor of this component (either the containing Window or Applet), or null if this component has not been added to any container.
		System.out.println("JComponent, getTopLevelAncestor()");
		return null;
	}

	public Rectangle getVisibleRect()
	{
		///    Returns the Component's "visible rectangle" - the intersection of this components visible rectangle:
		System.out.println("JComponent, getVisibleRect()");
		return null;
	}

	public void grabFocus()
	{
		//      Set the focus on the receiving component.
	}

	public boolean hasFocus()
	{
		//      Returns true if this Component has the keyboard focus.
		return false;
	}

	public boolean isDoubleBuffered()
	{	return use_double_buffer;    }

	public boolean isFocusCycleRoot()
	{
		//      Override this method and return true if your component is the root of of a component tree with its own focus cycle.
		return false;
	}

	public boolean isFocusTraversable()
	{
		//      Identifies whether or not this component can receive the focus.
		return false;
	}

	public static boolean isLightweightComponent(Component c)
	{
		return c.getPeer() instanceof LightweightPeer;
	}

	public boolean isManagingFocus()
	{
		//      Override this method and return true if your JComponent manages focus.
		return false;
	}

        public boolean isOpaque()
	{	return opaque;    }

	public boolean isOptimizedDrawingEnabled()
	{
		//      Returns true if this component tiles its children,
		return true;
	}

	public boolean isPaintingTile()
	{
		//      Returns true if the receiving component is currently painting a tile.
		return false;
	}

	public boolean isRequestFocusEnabled()
	{
		//      Return whether the receiving component can obtain the focus by calling requestFocus
		return false;
	}

	public boolean isValidateRoot()
	{
		//      If this method returns true, revalidate() calls by descendants of this component will cause the entire tree beginning with this root to be validated.
		return false;
	}

	public void paint(Graphics g)
	{
		//	System.out.println("SWING_PAINT:" + this);

		paintBorder(g);
		paintComponent(g);
		paintChildren(g);
	}

	protected  void paintBorder(Graphics g)
	{
		//	System.out.println("PAINT_BORDER      x XXXXXXX x x x x x x x x x x x x:" + getBorder() + ", THIS="+this);

		//       Paint the component's border.
		if (getBorder() != null)
		{
			//System.out.println("PAINT_BORDER      x XXXXXXX x x x x x x x x x x x x:" + getBorder() + ", THIS="+this);

			getBorder().paintBorder(this,
			                        g,
			                        0,
			                        0,
			                        getWidth(),
			                        getHeight());
		}
	}

	protected  void paintChildren(Graphics g)
	{
	    //      Paint this component's children.
	    //super.paintChildren(g);
	}

	protected  void paintComponent(Graphics g)
	{
		//      If the UI delegate is non-null, call its paint method.
		if (ui != null)
		{
			ui.paint(g, this);
		}
	}
    
    /**
     * Paint the specified region in this component and all of 
     * its descendants that overlap the region, immediately.
     */
	public void paintImmediately(int x, int y, int w, int h)
        {
	
	    //Ronald: this shoudld probably redirect to the PLAF ....
	}

	public void paintImmediately(Rectangle r)
	{
	    ///      Paint the specified region now.
	    paintImmediately((int)r.getX(),
			     (int)r.getY(),
			     (int)r.getWidth(),
			     (int)r.getHeight());
	}
	protected  String paramString()
	{
		//      Returns a string representation of this JComponent.
		return "JComponent";
	}
	protected  void processComponentKeyEvent(KeyEvent e)
	{
		//     Process any key events that the component itself recognizes.
	    //System.out.println("COMP_KEY-EVENT: " + e);
	}
	protected  void processFocusEvent(FocusEvent e)
	{
		//      Processes focus events occurring on this component by dispatching them to any registered FocusListener objects.
	    //System.out.println("FOCUS_EVENT: " + e);
	}

	protected  void processKeyEvent(KeyEvent e)
	{
		//      Override processKeyEvent to process events protected
	    //System.out.println("KEY-EVENT: " + e);
	}

        public void processMouseMotionEvent(MouseEvent e)
	{
	    //      Processes mouse motion events occurring on this component by dispatching them to any registered MouseMotionListener objects.
	    //System.out.println("COMP_MOUSE-EVENT: " + e + ", MEMORY = " + Runtime.getRuntime().freeMemory());
	}

	public void registerKeyboardAction(ActionListener anAction,
	                            KeyStroke aKeyStroke,
	                            int aCondition)
	{
		registerKeyboardAction(anAction,
		                       null,
		                       aKeyStroke,
		                       aCondition);
	}

	public void registerKeyboardAction(ActionListener anAction,
	                            String aCommand,
	                            KeyStroke aKeyStroke,
	                            int aCondition)
	{
		//  Register a new keyboard action.
	}


	public void removeNotify()
	{
		//      Notification to this component that it no longer has a parent component.
	}

	public void repaint(long tm, int x, int y, int width, int height)
	{
		//   Adds the specified region to the dirty region list if the component is showing.
		//System.out.println("JC: repaint");
		super.repaint(tm, x,y,width,height);
	}

	public void repaint(Rectangle r)
	{
		//      Adds the specified region to the dirty region list if the component is showing.
		repaint((long)0,
		        (int)r.getX(),
		        (int)r.getY(),
		        (int)r.getWidth(),
		        (int)r.getHeight());
	}

	public boolean requestDefaultFocus()
	{
		//      Request the focus for the component that should have the focus by default.
		return false;
	}

	public void requestFocus()
	{
		//      Set focus on the receiving component if isRequestFocusEnabled returns true
		super.requestFocus();
	}

	public void resetKeyboardActions()
	{
		//      Unregister all keyboard actions
	}

	public void reshape(int x, int y, int w, int h)
	{
		///      Moves and resizes this component.
		super.reshape(x,y,w,h);
	}

	public void revalidate()
	{
		//     Support for deferred automatic layout.
		if (getParent() == null)
			invalidate();
	}

	public void scrollRectToVisible(Rectangle aRect)
	{
		//      Forwards the scrollRectToVisible() message to the JComponent's parent.
	}

	public void setAlignmentX(float alignmentX)
	{
		//      Set the the vertical alignment.
	}

	public void setAlignmentY(float alignmentY)
	{
		//      Set the the horizontal alignment.
	}

	public void setAutoscrolls(boolean autoscrolls)
	{
		//      If true this component will automatically scroll its contents when dragged, if contained in a component that supports scrolling, such as JViewport
	}


	public void setDebugGraphicsOptions(int debugOptions)
	{
		//      Enables or disables diagnostic information about every graphics operation performed within the component or one of its children.
	}

	public void setDoubleBuffered(boolean aFlag)
	{
		use_double_buffer = aFlag;
	}

	public void setEnabled(boolean enabled)
	{
		// Sets whether or not this component is enabled.
		super.setEnabled(enabled);
		repaint();
	}

	public void setFont(Font font)
	{
		super.setFont(font);
		revalidate();
		repaint();
	}
	public void setBackground(Color bg)
	{
		super.setBackground(bg);
		revalidate();
		repaint();
	}
	public void setForeground(Color fg)
	{
		super.setForeground(fg);
		revalidate();
		repaint();
	}

	public void setMaximumSize(Dimension maximumSize)
	{	max = maximumSize;    }

	public void setMinimumSize(Dimension minimumSize)
	{   min = minimumSize; }

	public void setPreferredSize(Dimension preferredSize)
	{   pref = preferredSize;   }

	public void setNextFocusableComponent(Component aComponent)
	{
		//       Specifies the next component to get the focus after this one, for example, when the tab key is pressed.
	}

	public void setOpaque(boolean isOpaque)
	{
		opaque = isOpaque;
		revalidate();
		repaint();
	}


	public void setRequestFocusEnabled(boolean aFlag)
	{
	}


	public void setVisible(boolean aFlag)
	{
		//    Makes the component visible or invisible.

		super.setVisible(aFlag);
		if (getParent() != null)
		{
			Rectangle dims = getBounds();
			getParent().repaint((int)dims.getX(),
			                    (int)dims.getY(),
			                    (int)dims.getWidth(),
			                    (int)dims.getHeight());
		}
	}

	public void unregisterKeyboardAction(KeyStroke aKeyStroke)
	{
		//          Unregister a keyboard action.
	}


	public void update(Graphics g)
	{
		paint(g);
	}



	/******************************************
	 *
	 *
	 *  UI management
	 * 
	 *
	 *********/

        public String getUIClassID()
	{
		///          Return the UIDefaults key used to look up the name of the swing.
		return "JComponent";
	}

	protected void setUI(ComponentUI newUI)
	{
		if (ui != null)
		{
			ui.uninstallUI(this);
		}

		//          Set the look and feel delegate for this component.
		ui = newUI;

		if (ui != null)
		{
			ui.installUI(this);
		}

		revalidate();
		repaint();
	}

	public void updateUI()
	{
		//        Resets the UI property to a value from the current look and feel.
		System.out.println("update UI not overwritten in class: " + this);
	}

}