1 | /*
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2 | * LinearGradient.java
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3 | *
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4 | *
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5 | * The Salamander Project - 2D and 3D graphics libraries in Java
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6 | * Copyright (C) 2004 Mark McKay
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7 | *
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8 | * This library is free software; you can redistribute it and/or
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9 | * modify it under the terms of the GNU Lesser General Public
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10 | * License as published by the Free Software Foundation; either
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11 | * version 2.1 of the License, or (at your option) any later version.
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12 | *
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13 | * This library is distributed in the hope that it will be useful,
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 | * Lesser General Public License for more details.
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17 | *
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18 | * You should have received a copy of the GNU Lesser General Public
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19 | * License along with this library; if not, write to the Free Software
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20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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21 | *
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22 | * Mark McKay can be contacted at mark@kitfox.com. Salamander and other
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23 | * projects can be found at http://www.kitfox.com
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24 | *
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25 | * Created on January 26, 2004, 1:54 AM
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26 | */
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27 |
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28 | package com.kitfox.svg;
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29 |
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30 | import com.kitfox.svg.xml.StyleAttribute;
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31 | import java.awt.Graphics2D;
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32 | import java.awt.Shape;
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33 | import java.awt.geom.AffineTransform;
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34 | import java.awt.geom.Rectangle2D;
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35 | import java.net.URI;
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36 |
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37 | /**
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38 | * @author Mark McKay
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39 | * @author <a href="mailto:mark@kitfox.com">Mark McKay</a>
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40 | */
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41 | public class Use extends ShapeElement {
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42 |
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43 | float x = 0f;
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44 | float y = 0f;
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45 | float width = 1f;
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46 | float height = 1f;
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47 |
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48 | SVGElement href = null;
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49 |
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50 | AffineTransform refXform;
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51 |
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52 | /** Creates a new instance of LinearGradient */
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53 | public Use() {
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54 | }
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55 | /*
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56 | public void loaderStartElement(SVGLoaderHelper helper, Attributes attrs, SVGElement parent)
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57 | {
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58 | //Load style string
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59 | super.loaderStartElement(helper, attrs, parent);
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60 |
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61 | String x = attrs.getValue("x");
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62 | String y = attrs.getValue("y");
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63 | String width = attrs.getValue("width");
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64 | String height = attrs.getValue("height");
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65 | String href = attrs.getValue("xlink:href");
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66 |
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67 | if (x != null) this.x = (float)XMLParseUtil.parseRatio(x);
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68 | if (y != null) this.y = (float)XMLParseUtil.parseRatio(y);
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69 | if (width != null) this.width = (float)XMLParseUtil.parseRatio(width);
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70 | if (height != null) this.height = (float)XMLParseUtil.parseRatio(height);
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71 |
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72 |
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73 | if (href != null)
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74 | {
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75 | try {
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76 | URI src = getXMLBase().resolve(href);
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77 | this.href = helper.universe.getElement(src);
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78 | }
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79 | catch (Exception e)
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80 | {
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81 | e.printStackTrace();
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82 | }
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83 | }
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84 |
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85 | //Determine use offset/scale
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86 | refXform = new AffineTransform();
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87 | refXform.translate(this.x, this.y);
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88 | refXform.scale(this.width, this.height);
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89 | }
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90 | */
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91 | protected void build() throws SVGException
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92 | {
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93 | super.build();
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94 |
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95 | StyleAttribute sty = new StyleAttribute();
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96 |
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97 | if (getPres(sty.setName("x"))) x = sty.getFloatValueWithUnits();
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98 |
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99 | if (getPres(sty.setName("y"))) y = sty.getFloatValueWithUnits();
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100 |
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101 | if (getPres(sty.setName("width"))) width = sty.getFloatValueWithUnits();
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102 |
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103 | if (getPres(sty.setName("height"))) height = sty.getFloatValueWithUnits();
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104 |
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105 | if (getPres(sty.setName("xlink:href")))
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106 | {
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107 | URI src = sty.getURIValue(getXMLBase());
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108 | href = diagram.getUniverse().getElement(src);
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109 | }
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110 |
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111 | //Determine use offset/scale
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112 | refXform = new AffineTransform();
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113 | refXform.translate(this.x, this.y);
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114 | }
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115 |
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116 | public void render(Graphics2D g) throws SVGException
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117 | {
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118 | beginLayer(g);
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119 |
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120 | //AffineTransform oldXform = g.getTransform();
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121 | AffineTransform oldXform = g.getTransform();
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122 | g.transform(refXform);
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123 |
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124 | if (href == null || !(href instanceof RenderableElement)) return;
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125 |
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126 | RenderableElement rendEle = (RenderableElement)href;
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127 | rendEle.pushParentContext(this);
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128 | rendEle.render(g);
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129 | rendEle.popParentContext();
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130 |
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131 | g.setTransform(oldXform);
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132 |
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133 | finishLayer(g);
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134 | }
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135 |
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136 | public Shape getShape()
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137 | {
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138 | if (href instanceof ShapeElement)
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139 | {
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140 | Shape shape = ((ShapeElement)href).getShape();
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141 | shape = refXform.createTransformedShape(shape);
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142 | shape = shapeToParent(shape);
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143 | return shape;
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144 | }
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145 |
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146 | return null;
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147 | }
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148 |
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149 | public Rectangle2D getBoundingBox() throws SVGException
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150 | {
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151 | if (href instanceof ShapeElement)
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152 | {
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153 | ShapeElement shapeEle = (ShapeElement)href;
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154 | shapeEle.pushParentContext(this);
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155 | Rectangle2D bounds = shapeEle.getBoundingBox();
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156 | shapeEle.popParentContext();
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157 |
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158 | bounds = refXform.createTransformedShape(bounds).getBounds2D();
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159 | bounds = boundsToParent(bounds);
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160 |
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161 | return bounds;
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162 | }
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163 |
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164 | return null;
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165 | }
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166 |
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167 | /**
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168 | * Updates all attributes in this diagram associated with a time event.
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169 | * Ie, all attributes with track information.
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170 | * @return - true if this node has changed state as a result of the time
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171 | * update
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172 | */
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173 | public boolean updateTime(double curTime) throws SVGException
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174 | {
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175 | // if (trackManager.getNumTracks() == 0) return false;
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176 | boolean changeState = super.updateTime(curTime);
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177 |
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178 | //Get current values for parameters
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179 | StyleAttribute sty = new StyleAttribute();
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180 | boolean shapeChange = false;
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181 |
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182 | if (getPres(sty.setName("x")))
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183 | {
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184 | float newVal = sty.getFloatValueWithUnits();
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185 | if (newVal != x)
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186 | {
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187 | x = newVal;
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188 | shapeChange = true;
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189 | }
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190 | }
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191 |
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192 | if (getPres(sty.setName("y")))
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193 | {
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194 | float newVal = sty.getFloatValueWithUnits();
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195 | if (newVal != y)
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196 | {
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197 | y = newVal;
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198 | shapeChange = true;
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199 | }
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200 | }
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201 |
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202 | if (getPres(sty.setName("width")))
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203 | {
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204 | float newVal = sty.getFloatValueWithUnits();
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205 | if (newVal != width)
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206 | {
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207 | width = newVal;
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208 | shapeChange = true;
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209 | }
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210 | }
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211 |
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212 | if (getPres(sty.setName("height")))
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213 | {
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214 | float newVal = sty.getFloatValueWithUnits();
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215 | if (newVal != height)
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216 | {
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217 | height = newVal;
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218 | shapeChange = true;
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219 | }
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220 | }
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221 |
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222 | if (getPres(sty.setName("xlink:href")))
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223 | {
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224 | URI src = sty.getURIValue(getXMLBase());
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225 | SVGElement newVal = diagram.getUniverse().getElement(src);
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226 | if (newVal != href)
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227 | {
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228 | href = newVal;
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229 | shapeChange = true;
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230 | }
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231 | }
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232 | /*
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233 | if (getPres(sty.setName("xlink:href")))
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234 | {
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235 | URI src = sty.getURIValue(getXMLBase());
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236 | href = diagram.getUniverse().getElement(src);
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237 | }
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238 |
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239 | //Determine use offset/scale
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240 | refXform = new AffineTransform();
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241 | refXform.translate(this.x, this.y);
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242 | refXform.scale(this.width, this.height);
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243 | */
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244 | if (shapeChange)
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245 | {
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246 | build();
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247 | //Determine use offset/scale
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248 | // refXform.setToTranslation(this.x, this.y);
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249 | // refXform.scale(this.width, this.height);
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250 | // return true;
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251 | }
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252 |
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253 | return changeState || shapeChange;
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254 | }
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255 | }
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