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1 /* |
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2 * CDDL HEADER START |
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3 * |
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4 * The contents of this file are subject to the terms of the |
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5 * Common Development and Distribution License (the "License"). |
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6 * You may not use this file except in compliance with the License. |
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7 * |
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8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
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9 * or http://www.opensolaris.org/os/licensing. |
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10 * See the License for the specific language governing permissions |
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11 * and limitations under the License. |
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12 * |
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13 * When distributing Covered Code, include this CDDL HEADER in each |
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14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
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15 * If applicable, add the following below this CDDL HEADER, with the |
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16 * fields enclosed by brackets "[]" replaced with your own identifying |
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17 * information: Portions Copyright [yyyy] [name of copyright owner] |
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18 * |
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19 * CDDL HEADER END |
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20 */ |
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21 |
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22 /* |
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23 * Copyright (c) 2009, 2012, Oracle and/or its affiliates. All rights reserved. |
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24 */ |
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25 |
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26 package com.oracle.solaris.vp.util.swing; |
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27 |
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28 import java.awt.*; |
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29 import java.awt.event.*; |
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30 import javax.swing.*; |
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31 |
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32 @SuppressWarnings({"serial"}) |
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33 public class GradientPanel extends JPanel { |
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34 // |
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35 // Enums |
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36 // |
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37 |
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38 public enum Direction { |
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39 NORTHWEST, NORTH, NORTHEAST, EAST, |
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40 SOUTHEAST, SOUTH, SOUTHWEST, WEST, |
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41 } |
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42 |
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43 // |
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44 // Static methods |
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45 // |
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46 |
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47 private static final Direction _DIRECTION = Direction.SOUTH; |
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48 |
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49 // |
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50 // Instance data |
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51 // |
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52 |
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53 private Direction direction; |
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54 private Color startColor; |
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55 private Color endColor; |
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56 |
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57 // |
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58 // Constructors |
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59 // |
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60 |
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61 public GradientPanel(Direction direction, Color startColor, |
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62 Color endColor) { |
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63 this.direction = direction; |
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64 this.startColor = startColor; |
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65 this.endColor = endColor; |
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66 } |
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67 |
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68 public GradientPanel(Color startColor, Color endColor) { |
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69 this(_DIRECTION, startColor, endColor); |
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70 } |
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71 |
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72 public GradientPanel() { |
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73 this(_DIRECTION, null, null); |
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74 } |
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75 |
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76 // |
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77 // GradientPanel methods |
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78 // |
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79 |
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80 public Direction getDirection() { |
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81 return direction; |
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82 } |
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83 |
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84 public Color getStartColor() { |
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85 return startColor; |
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86 } |
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87 |
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88 public Color getEndColor() { |
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89 return endColor; |
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90 } |
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91 |
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92 public void setDirection(Direction direction) { |
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93 this.direction = direction; |
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94 repaint(); |
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95 } |
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96 |
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97 public void setStartColor(Color startColor) { |
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98 this.startColor = startColor; |
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99 repaint(); |
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100 } |
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101 |
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102 public void setEndColor(Color endColor) { |
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103 this.endColor = endColor; |
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104 repaint(); |
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105 } |
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106 |
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107 // |
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108 // JComponent methods |
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109 // |
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110 |
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111 @Override |
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112 protected void paintComponent(Graphics g) { |
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113 Color startColor = getStartColor(); |
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114 Color endColor = getEndColor(); |
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115 |
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116 if (startColor == null) { |
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117 startColor = getBackground(); |
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118 } |
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119 |
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120 if (endColor == null) { |
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121 endColor = getBackground(); |
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122 } |
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123 |
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124 Graphics2D g2 = (Graphics2D)g; |
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125 |
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126 int w = getWidth(); |
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127 int h = getHeight(); |
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128 |
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129 int startX, startY, endX, endY; |
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130 |
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131 switch (getDirection()) { |
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132 case NORTHWEST: |
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133 startX = w; |
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134 startY = h; |
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135 endX = 0; |
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136 endY = 0; |
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137 break; |
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138 |
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139 case NORTH: |
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140 startX = 0; |
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141 startY = h; |
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142 endX = 0; |
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143 endY = 0; |
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144 break; |
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145 |
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146 case NORTHEAST: |
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147 startX = 0; |
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148 startY = h; |
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149 endX = w; |
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150 endY = 0; |
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151 break; |
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152 |
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153 case EAST: |
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154 startX = 0; |
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155 startY = 0; |
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156 endX = w; |
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157 endY = 0; |
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158 break; |
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159 |
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160 case SOUTHWEST: |
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161 startX = w; |
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162 startY = 0; |
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163 endX = 0; |
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164 endY = h; |
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165 break; |
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166 |
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167 default: |
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168 case SOUTH: |
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169 startX = 0; |
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170 startY = 0; |
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171 endX = 0; |
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172 endY = h; |
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173 break; |
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174 |
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175 case SOUTHEAST: |
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176 startX = 0; |
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177 startY = 0; |
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178 endX = w; |
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179 endY = h; |
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180 break; |
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181 |
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182 case WEST: |
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183 startX = w; |
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184 startY = 0; |
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185 endX = 0; |
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186 endY = 0; |
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187 break; |
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188 } |
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189 |
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190 GradientPaint gradient = new GradientPaint( |
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191 startX, startY, startColor, endX, endY, endColor, true); |
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192 |
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193 g2.setPaint(gradient); |
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194 g2.fillRect(0, 0, w, h); |
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195 } |
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196 |
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197 // |
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198 // Static methods |
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199 // |
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200 |
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201 /** |
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202 * Unit test/example. |
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203 */ |
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204 public static void main(String[] args) { |
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205 |
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206 Color start = new Color(112, 130, 144); |
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207 Color end = new Color(64, 82, 101); |
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208 final GradientPanel panel = new GradientPanel(start, end); |
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209 ItemListener listener = new ItemListener() { |
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210 @Override |
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211 public void itemStateChanged(ItemEvent e) { |
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212 int change = e.getStateChange(); |
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213 if (change == ItemEvent.SELECTED) { |
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214 panel.setDirection((Direction)e.getItem()); |
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215 } |
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216 } |
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217 }; |
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218 |
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219 JComboBox combo = new JComboBox(Direction.values()); |
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220 combo.addItemListener(listener); |
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221 combo.setSelectedIndex(-1); |
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222 combo.setSelectedIndex(0); |
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223 |
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224 JFrame f = new JFrame(); |
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225 panel.add(combo); |
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226 Container c = f.getContentPane(); |
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227 c.setLayout(new BorderLayout()); |
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228 c.add(panel, BorderLayout.CENTER); |
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229 |
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230 // f.pack(); |
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231 f.setSize(300, 300); |
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232 f.setVisible(true); |
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233 } |
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234 } |