Source for org.jfree.report.util.ScalingExtendedDrawable

   1: /**
   2:  * ========================================
   3:  * JFreeReport : a free Java report library
   4:  * ========================================
   5:  *
   6:  * Project Info:  http://reporting.pentaho.org/
   7:  *
   8:  * (C) Copyright 2000-2007, by Object Refinery Limited, Pentaho Corporation and Contributors.
   9:  *
  10:  * This library is free software; you can redistribute it and/or modify it under the terms
  11:  * of the GNU Lesser General Public License as published by the Free Software Foundation;
  12:  * either version 2.1 of the License, or (at your option) any later version.
  13:  *
  14:  * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
  15:  * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  16:  * See the GNU Lesser General Public License for more details.
  17:  *
  18:  * You should have received a copy of the GNU Lesser General Public License along with this
  19:  * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  20:  * Boston, MA 02111-1307, USA.
  21:  *
  22:  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
  23:  * in the United States and other countries.]
  24:  *
  25:  * ------------
  26:  * $Id: ScalingExtendedDrawable.java 3525 2007-10-16 11:43:48Z tmorgner $
  27:  * ------------
  28:  * (C) Copyright 2000-2005, by Object Refinery Limited.
  29:  * (C) Copyright 2005-2007, by Pentaho Corporation.
  30:  */
  31: package org.jfree.report.util;
  32: 
  33: import java.awt.Dimension;
  34: import java.awt.Graphics2D;
  35: import java.awt.geom.Rectangle2D;
  36: 
  37: import org.jfree.ui.ExtendedDrawable;
  38: 
  39: /**
  40:  * Creation-Date: 20.01.2006, 19:46:10
  41:  *
  42:  * @author Thomas Morgner
  43:  */
  44: public class ScalingExtendedDrawable implements ExtendedDrawable
  45: {
  46:   private float scaleX;
  47:   private float scaleY;
  48:   private ExtendedDrawable drawable;
  49: 
  50:   public ScalingExtendedDrawable()
  51:   {
  52:     scaleX = 1;
  53:     scaleY = 1;
  54:   }
  55: 
  56:   public ExtendedDrawable getDrawable()
  57:   {
  58:     return drawable;
  59:   }
  60: 
  61:   public void setDrawable(final ExtendedDrawable drawable)
  62:   {
  63:     this.drawable = drawable;
  64:   }
  65: 
  66:   public float getScaleY()
  67:   {
  68:     return scaleY;
  69:   }
  70: 
  71:   public void setScaleY(final float scaleY)
  72:   {
  73:     this.scaleY = scaleY;
  74:   }
  75: 
  76:   public float getScaleX()
  77:   {
  78:     return scaleX;
  79:   }
  80: 
  81:   public void setScaleX(final float scaleX)
  82:   {
  83:     this.scaleX = scaleX;
  84:   }
  85: 
  86:   /**
  87:    * Returns the preferred size of the drawable. If the drawable is aspect ratio
  88:    * aware, these bounds should be used to compute the preferred aspect ratio
  89:    * for this drawable.
  90:    *
  91:    * @return the preferred size.
  92:    */
  93:   public Dimension getPreferredSize()
  94:   {
  95:     if (drawable == null)
  96:     {
  97:       return new Dimension(0,0);
  98:     }
  99: 
 100:     final Dimension dim = drawable.getPreferredSize();
 101:     if (dim == null)
 102:     {
 103:       return null;
 104:     }
 105:     dim.setSize(scaleX * dim.getWidth(), scaleY * dim.getHeight());
 106:     return dim;
 107:   }
 108: 
 109:   /**
 110:    * Returns true, if this drawable will preserve an aspect ratio during the
 111:    * drawing.
 112:    *
 113:    * @return true, if an aspect ratio is preserved, false otherwise.
 114:    */
 115:   public boolean isPreserveAspectRatio()
 116:   {
 117:     if (drawable == null)
 118:     {
 119:       return false;
 120:     }
 121:     return drawable.isPreserveAspectRatio();
 122:   }
 123: 
 124:   /**
 125:    * Draws the object.
 126:    *
 127:    * @param g2   the graphics device.
 128:    * @param area the area inside which the object should be drawn.
 129:    */
 130:   public void draw(final Graphics2D g2, final Rectangle2D area)
 131:   {
 132:     if (drawable == null)
 133:     {
 134:       return;
 135:     }
 136:     final Graphics2D derived = (Graphics2D) g2.create();
 137:     derived.scale(scaleX, scaleY);
 138:     final Rectangle2D scaledArea = (Rectangle2D) area.clone();
 139:     scaledArea.setRect(scaledArea.getX() * scaleX, scaledArea.getY() * scaleY,
 140:             scaledArea.getWidth() * scaleX, scaledArea.getHeight() * scaleY);
 141:     drawable.draw(derived, scaledArea);
 142:     derived.dispose();
 143:   }
 144: }