Source for javax.swing.plaf.metal.MetalCheckBoxIcon

   1: /* MetalCheckBoxIcon.java -- An icon for JCheckBoxes in the Metal L&F
   2:    Copyright (C) 2005, 2006 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.Component;
  42: import java.awt.Graphics;
  43: import java.io.Serializable;
  44: 
  45: import javax.swing.AbstractButton;
  46: import javax.swing.Icon;
  47: import javax.swing.SwingConstants;
  48: import javax.swing.UIManager;
  49: import javax.swing.plaf.UIResource;
  50: 
  51: /**
  52:  * An {@link Icon} used by the {@link MetalCheckBoxUI} class.
  53:  *
  54:  * @author Roman Kennke (roman@kennke.org)
  55:  */
  56: public class MetalCheckBoxIcon
  57:   implements Icon, UIResource, Serializable
  58: {
  59: 
  60:   /** Used to paint the border of the icon. */
  61:   MetalBorders.ButtonBorder border;
  62: 
  63:   /**
  64:    * Creates a new MetalCheckBoxIcon instance.
  65:    */
  66:   public MetalCheckBoxIcon()
  67:   {
  68:     border = new MetalBorders.ButtonBorder();
  69:   }
  70: 
  71:   /**
  72:    * Draws the check in the CheckBox.
  73:    *
  74:    * @param c the component to draw on
  75:    * @param g the Graphics context to draw with
  76:    * @param x the X position
  77:    * @param y the Y position
  78:    */
  79:   protected void drawCheck(Component c, Graphics g, int x, int y)
  80:   {
  81:     if (c.isEnabled())
  82:       g.setColor(MetalLookAndFeel.getBlack());
  83:     else
  84:       g.setColor(MetalLookAndFeel.getControlDisabled());
  85:     g.drawLine(3 + x, 5 + y, 3 + x, 9 + y);
  86:     g.drawLine(4 + x, 5 + y, 4 + x, 9 + y);
  87:     g.drawLine(5 + x, 7 + y, 9 + x, 3 + y);
  88:     g.drawLine(5 + x, 8 + y, 9 + x, 4 + y);
  89:   }
  90: 
  91:   /**
  92:    * Returns the size (both X and Y) of the checkbox icon.
  93:    *
  94:    * @return the size of the checkbox icon
  95:    */
  96:   protected int getControlSize()
  97:   {
  98:     return 13;
  99:   }
 100: 
 101:   /**
 102:    * Returns the width of the icon in pixels.
 103:    *
 104:    * @return the width of the icon in pixels
 105:    */
 106:   public int getIconWidth()
 107:   {
 108:     return getControlSize();
 109:   }
 110: 
 111:   /**
 112:    * Returns the height of the icon in pixels.
 113:    *
 114:    * @return the height of the icon in pixels
 115:    */
 116:   public int getIconHeight()
 117:   {
 118:     return getControlSize();
 119:   }
 120: 
 121:   /**
 122:    * Paints the icon. This first paints the border of the CheckBox and
 123:    * if the CheckBox is selected it calls {@link #drawCheck} to draw
 124:    * the check.
 125:    *
 126:    * @param c the Component to draw on (gets casted to JCheckBox)
 127:    * @param g the Graphics context to draw with
 128:    * @param x the X position
 129:    * @param y the Y position
 130:    */
 131:   public void paintIcon(Component c, Graphics g, int x, int y)
 132:   {
 133:     if (UIManager.get("CheckBox.gradient") != null)
 134:       MetalUtils.paintGradient(g, x, y, getIconWidth(), getIconHeight(),
 135:                                SwingConstants.VERTICAL, "CheckBox.gradient");
 136:     border.paintBorder(c, g, x, y, getIconWidth(), getIconHeight());
 137:     
 138:     AbstractButton b = (AbstractButton) c;
 139:     if (b.isSelected())
 140:       drawCheck(b, g, x, y);
 141:   }
 142: }