libjava/javax/swing/plaf/ComponentUI.java

   1 package javax.swing.plaf;
   2
   3 import java.awt.*;
   4 import javax.swing.border.*;
   5 import javax.swing.*;
   6
   7 import javax.accessibility.*;
   8
   9 public abstract class ComponentUI
  10     implements UIResource // ??
  11 {
  12     boolean contains(JComponent c, int x, int y)
  13     {
  14         return c.inside(x,y);
  15     }
  16
  17     // this SHOULD thow an error:
  18     public static ComponentUI createUI(JComponent c)
  19     {
  20         Exception e = new Exception("createUI from ComponentUI should never be called");
  21         e.printStackTrace();
  22         System.exit(1);
  23         return null;
  24     }
  25
  26     public Accessible getAccessibleChild(JComponent c, int i)
  27     {
  28         //Return the nth Accessible child of the object.
  29         return null;
  30     }
  31
  32     public int getAccessibleChildrenCount(JComponent c)
  33     {
  34         //Returns the number of accessible children in the object.
  35         return 0;
  36     }
  37
  38     public Dimension getMaximumSize(JComponent c)
  39     {
  40         return getPreferredSize(c);
  41     }
  42
  43     public Dimension getMinimumSize(JComponent c)
  44     {
  45         return getPreferredSize(c);
  46     }
  47
  48     public Dimension getPreferredSize(JComponent c)
  49     {
  50         return null;
  51     }
  52
  53     public void installUI(JComponent c)
  54     {
  55         String id = c.getUIClassID() + ".border";
  56
  57         Border s = UIManager.getBorder( id );
  58
  59         if (s != null)
  60             {
  61                 c.setBorder( s );
  62                 //System.out.println("OK-INSTALL: " + this + ", ID=" + id + ",B="+s);
  63             }
  64         else
  65             {
  66                 ///System.out.println("FAIL-INSTALL: " + this + ", " + id);
  67             }
  68     }
  69
  70     public void paint(Graphics g, JComponent c)
  71     {
  72         //  System.out.println("UI-COMPONENT-> unimplemented paint: " + c + ", UI="+this);
  73     }
  74
  75     public void uninstallUI(JComponent c)
  76     {
  77     }
  78
  79     public void update(Graphics g, JComponent c) {
  80         if (c.isOpaque()) {
  81             g.setColor(c.getBackground());
  82             g.fillRect(0, 0, c.getWidth(),c.getHeight());
  83         }
  84         paint(g, c);
  85     }
  86
  87 }
  88