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1: /* ======================================================================== 2: * JCommon : a free general purpose class library for the Java(tm) platform 3: * ======================================================================== 4: * 5: * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors. 6: * 7: * Project Info: http://www.jfree.org/jcommon/index.html 8: * 9: * This library is free software; you can redistribute it and/or modify it 10: * under the terms of the GNU Lesser General Public License as published by 11: * the Free Software Foundation; either version 2.1 of the License, or 12: * (at your option) any later version. 13: * 14: * This library is distributed in the hope that it will be useful, but 15: * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 16: * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 17: * License for more details. 18: * 19: * You should have received a copy of the GNU Lesser General Public 20: * License along with this library; if not, write to the Free Software 21: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 22: * USA. 23: * 24: * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 25: * in the United States and other countries.] 26: * 27: * --------------- 28: * ArrowPanel.java 29: * --------------- 30: * (C) Copyright 2002-2004, by Object Refinery Limited. 31: * 32: * Original Author: David Gilbert (for Object Refinery Limited); 33: * Contributor(s): -; 34: * 35: * $Id: ArrowPanel.java,v 1.6 2007/11/02 17:50:36 taqua Exp $ 36: * 37: * Changes 38: * ------- 39: * 25-Sep-2002 : Version 1 (DG); 40: * 13-Oct-2002 : Added Javadocs (DG); 41: * 42: */ 43: 44: package org.jfree.ui; 45: 46: import java.awt.Dimension; 47: import java.awt.Graphics; 48: import java.awt.Graphics2D; 49: import java.awt.Insets; 50: import java.awt.Polygon; 51: import java.awt.Shape; 52: import java.awt.geom.Rectangle2D; 53: import javax.swing.JPanel; 54: 55: /** 56: * A basic panel that displays a small up or down arrow. 57: * 58: * @author David Gilbert 59: */ 60: public class ArrowPanel extends JPanel { 61: 62: /** A constant for the up arrow. */ 63: public static final int UP = 0; 64: 65: /** A constant for the down arrow. */ 66: public static final int DOWN = 1; 67: 68: /** The arrow type. */ 69: private int type = UP; 70: 71: /** The available area. */ 72: private Rectangle2D available = new Rectangle2D.Float(); 73: 74: /** 75: * Creates a new arrow panel. 76: * 77: * @param type the arrow type. 78: */ 79: public ArrowPanel(final int type) { 80: this.type = type; 81: setPreferredSize(new Dimension(14, 9)); 82: } 83: 84: /** 85: * Paints the arrow panel. 86: * 87: * @param g the graphics device for drawing on. 88: */ 89: public void paintComponent(final Graphics g) { 90: 91: super.paintComponent(g); 92: final Graphics2D g2 = (Graphics2D) g; 93: 94: // first determine the size of the drawing area... 95: final Dimension size = getSize(); 96: final Insets insets = getInsets(); 97: this.available.setRect(insets.left, insets.top, 98: size.getWidth() - insets.left - insets.right, 99: size.getHeight() - insets.top - insets.bottom); 100: g2.translate(insets.left, insets.top); 101: g2.fill(getArrow(this.type)); 102: 103: } 104: 105: /** 106: * Returns a shape for the arrow. 107: * 108: * @param t the arrow type. 109: * 110: * @return the arrow shape. 111: */ 112: private Shape getArrow(final int t) { 113: switch (t) { 114: case UP : return getUpArrow(); 115: case DOWN : return getDownArrow(); 116: default : return getUpArrow(); 117: } 118: } 119: 120: /** 121: * Returns an up arrow. 122: * 123: * @return an up arrow. 124: */ 125: private Shape getUpArrow() { 126: final Polygon result = new Polygon(); 127: result.addPoint(7, 2); 128: result.addPoint(2, 7); 129: result.addPoint(12, 7); 130: return result; 131: } 132: 133: /** 134: * Returns a down arrow. 135: * 136: * @return a down arrow. 137: */ 138: private Shape getDownArrow() { 139: final Polygon result = new Polygon(); 140: result.addPoint(7, 7); 141: result.addPoint(2, 2); 142: result.addPoint(12, 2); 143: return result; 144: } 145: 146: }