Source for javax.swing.plaf.metal.MetalCheckBoxIcon

   1: /* MetalCheckBoxIcon.java -- An icon for JCheckBoxes in the Metal L&F
   2:    Copyright (C) 2005 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package javax.swing.plaf.metal;
  40: 
  41: import java.awt.Color;
  42: import java.awt.Component;
  43: import java.awt.Graphics;
  44: 
  45: import java.io.Serializable;
  46: 
  47: import javax.swing.Icon;
  48: import javax.swing.JCheckBox;
  49: import javax.swing.plaf.UIResource;
  50: 
  51: /**
  52:  * An {@link Icon} implementation for {@link JCheckBox}es in the
  53:  * Metal Look & Feel.
  54:  *
  55:  * @author Roman Kennke (roman@kennke.org)
  56:  */
  57: public class MetalCheckBoxIcon
  58:   implements Icon, UIResource, Serializable
  59: {
  60: 
  61:   /** Used to paint the border of the icon. */
  62:   MetalBorders.ButtonBorder border;
  63: 
  64:   /**
  65:    * Creates a new MetalCheckBoxIcon instance.
  66:    */
  67:   public MetalCheckBoxIcon()
  68:   {
  69:     border = new MetalBorders.ButtonBorder();
  70:   }
  71: 
  72:   /**
  73:    * Draws the check in the CheckBox.
  74:    *
  75:    * @param c the component to draw on
  76:    * @param g the Graphics context to draw with
  77:    * @param x the X position
  78:    * @param y the Y position
  79:    */
  80:   protected void drawCheck(Component c, Graphics g, int x, int y)
  81:   {
  82:     g.setColor(Color.BLACK);
  83:     g.drawLine(3 + x, 5 + y, 3 + x, 9 + y);
  84:     g.drawLine(4 + x, 5 + y, 4 + x, 9 + y);
  85:     g.drawLine(5 + x, 7 + y, 9 + x, 3 + y);
  86:     g.drawLine(5 + x, 8 + y, 9 + x, 4 + y);
  87:   }
  88: 
  89:   /**
  90:    * Returns the size (both X and Y) of the checkbox icon.
  91:    *
  92:    * @return the size of the checkbox icon
  93:    */
  94:   protected int getControlSize()
  95:   {
  96:     return 13;
  97:   }
  98: 
  99:   /**
 100:    * Returns the width of the icon in pixels.
 101:    *
 102:    * @return the width of the icon in pixels
 103:    */
 104:   public int getIconWidth()
 105:   {
 106:     return getControlSize();
 107:   }
 108: 
 109:   /**
 110:    * Returns the height of the icon in pixels.
 111:    *
 112:    * @return the height of the icon in pixels
 113:    */
 114:   public int getIconHeight()
 115:   {
 116:     return getControlSize();
 117:   }
 118: 
 119:   /**
 120:    * Paints the icon. This first paints the border of the CheckBox and
 121:    * if the CheckBox is selected it calls {@link #drawCheck} to draw
 122:    * the check.
 123:    *
 124:    * @param c the Component to draw on (gets casted to JCheckBox)
 125:    * @param g the Graphics context to draw with
 126:    * @param x the X position
 127:    * @param y the Y position
 128:    */
 129:   public void paintIcon(Component c, Graphics g, int x, int y)
 130:   {
 131:     border.paintBorder(c, g, x, y, getIconWidth(), getIconHeight());
 132:     JCheckBox cb = (JCheckBox) c;
 133:     if (cb.isSelected())
 134:       drawCheck(c, g, x, y);
 135:   }
 136: }