Source Code Cross Referenced for RadialGradient.java in  » 6.0-JDK-Modules » j2me » com » sun » perseus » model » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » j2me » com.sun.perseus.model 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         *
003:         *
004:         * Copyright  1990-2007 Sun Microsystems, Inc. All Rights Reserved.
005:         * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
006:         * 
007:         * This program is free software; you can redistribute it and/or
008:         * modify it under the terms of the GNU General Public License version
009:         * 2 only, as published by the Free Software Foundation.
010:         * 
011:         * This program is distributed in the hope that it will be useful, but
012:         * WITHOUT ANY WARRANTY; without even the implied warranty of
013:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014:         * General Public License version 2 for more details (a copy is
015:         * included at /legal/license.txt).
016:         * 
017:         * You should have received a copy of the GNU General Public License
018:         * version 2 along with this work; if not, write to the Free Software
019:         * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA
021:         * 
022:         * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
023:         * Clara, CA 95054 or visit www.sun.com if you need additional
024:         * information or have any questions.
025:         */
026:        package com.sun.perseus.model;
027:
028:        import com.sun.perseus.util.SVGConstants;
029:
030:        import com.sun.perseus.j2d.PaintDef;
031:        import com.sun.perseus.j2d.PaintTarget;
032:        import com.sun.perseus.j2d.RadialGradientPaintDef;
033:        import com.sun.perseus.j2d.Transform;
034:
035:        import org.w3c.dom.DOMException;
036:
037:        import org.w3c.dom.svg.SVGRect;
038:
039:        /**
040:         * <code>LienarGraident</code> represents an SVG Tiny 1.2 
041:         * <code>&lt;radialGradient&gt;</code> element. 
042:         * <br />
043:         *
044:         * @version $Id: RadialGradient.java,v 1.6 2006/06/29 10:47:33 ln156897 Exp $
045:         */
046:        public class RadialGradient extends GradientElement {
047:            /**
048:             * Gradient center on the x-axis
049:             */
050:            float cx = 0.5f;
051:
052:            /**
053:             * Gradient center on the y-axis
054:             */
055:            float cy = 0.5f;
056:
057:            /**
058:             * Gradient radius
059:             */
060:            float r = 0.5f;
061:
062:            /**
063:             * Constructor.
064:             *
065:             * @param ownerDocument this element's owner <code>DocumentNode</code>
066:             */
067:            public RadialGradient(final DocumentNode ownerDocument) {
068:                super (ownerDocument);
069:            }
070:
071:            /**
072:             * @return the SVGConstants.SVG_RADIAL_GRADIENT_TAG value
073:             */
074:            public String getLocalName() {
075:                return SVGConstants.SVG_RADIAL_GRADIENT_TAG;
076:            }
077:
078:            /**
079:             * Used by <code>DocumentNode</code> to create a new instance from
080:             * a prototype <code>Rect</code>.
081:             *
082:             * @param doc the <code>DocumentNode</code> for which a new node is
083:             *        should be created.
084:             * @return a new <code>RadialGradient</code> for the requested document.
085:             */
086:            public ElementNode newInstance(final DocumentNode doc) {
087:                return new RadialGradient(doc);
088:            }
089:
090:            /**
091:             * Sets the cx property.
092:             *
093:             * @param newCX the new origin along the x-axis
094:             */
095:            public void setCx(final float newCX) {
096:                if (newCX == cx) {
097:                    return;
098:                }
099:
100:                this .cx = newCX;
101:                onPaintChange();
102:            }
103:
104:            /**
105:             * @return the cx property.
106:             */
107:            public float getCx() {
108:                return cx;
109:            }
110:
111:            /**
112:             * Sets the cy property.
113:             *
114:             * @param newCY the new origin along the y-axis
115:             */
116:            public void setCy(final float newCY) {
117:                if (newCY == cy) {
118:                    return;
119:                }
120:
121:                this .cy = newCY;
122:                onPaintChange();
123:            }
124:
125:            /**
126:             * @return the cy property.
127:             */
128:            public float getCy() {
129:                return cy;
130:            }
131:
132:            /**
133:             * Sets the r property.
134:             *
135:             * @param newR the new end along the x-axis
136:             */
137:            public void setR(final float newR) {
138:                if (newR == r) {
139:                    return;
140:                }
141:
142:                if (r < 0) {
143:                    throw new IllegalArgumentException();
144:                }
145:
146:                this .r = newR;
147:                onPaintChange();
148:            }
149:
150:            /**
151:             * @return the gradient's radius.
152:             */
153:            public float getR() {
154:                return r;
155:            }
156:
157:            /**
158:             * @param traitName the name of the trait which the element may support.
159:             * @return true if this element supports the given trait in one of the
160:             *         trait accessor methods.
161:             */
162:            boolean supportsTrait(final String traitName) {
163:                if (SVGConstants.SVG_CX_ATTRIBUTE == traitName
164:                        || SVGConstants.SVG_R_ATTRIBUTE == traitName
165:                        || SVGConstants.SVG_CY_ATTRIBUTE == traitName) {
166:                    return true;
167:                } else {
168:                    return super .supportsTrait(traitName);
169:                }
170:            }
171:
172:            /**
173:             * RadialGradient handles cx, cy, r traits as 
174:             * FloatTraitAnims. 
175:             *
176:             * @param traitName the trait name.
177:             */
178:            TraitAnim createTraitAnimImpl(final String traitName) {
179:                if (SVGConstants.SVG_CX_ATTRIBUTE == traitName
180:                        || SVGConstants.SVG_R_ATTRIBUTE == traitName
181:                        || SVGConstants.SVG_CY_ATTRIBUTE == traitName) {
182:                    return new FloatTraitAnim(this , traitName, TRAIT_TYPE_FLOAT);
183:                } else {
184:                    return super .createTraitAnimImpl(traitName);
185:                }
186:            }
187:
188:            /**
189:             * @param name the requested trait name (e.g., "ry")
190:             * @return the trait's value, as a string.
191:             *
192:             * @throws DOMException with error code NOT_SUPPORTED_ERROR if the requested
193:             * trait is not supported on this element or null.
194:             * @throws DOMException with error code TYPE_MISMATCH_ERR if requested
195:             * trait's computed value cannot be converted to a String (SVG Tiny only).
196:             */
197:            public String getTraitImpl(final String name) throws DOMException {
198:                if (SVGConstants.SVG_CX_ATTRIBUTE == name) {
199:                    return Float.toString(cx);
200:                } else if (SVGConstants.SVG_CY_ATTRIBUTE == name) {
201:                    return Float.toString(cy);
202:                } else if (SVGConstants.SVG_R_ATTRIBUTE == name) {
203:                    return Float.toString(r);
204:                } else {
205:                    return super .getTraitImpl(name);
206:                }
207:            }
208:
209:            /**
210:             * @param name the requested trait name (e.g., "y")
211:             * @return the requested trait value
212:             *
213:             * @throws DOMException with error code NOT_SUPPORTED_ERROR if the requested
214:             * trait is not supported on this element or null.
215:             * @throws DOMException with error code TYPE_MISMATCH_ERR if requested
216:             * trait's computed value cannot be converted to a float
217:             * @throws SecurityException if the application does not have the necessary
218:             * privilege rights to access this (SVG) content.
219:             */
220:            float getFloatTraitImpl(final String name) throws DOMException {
221:                if (SVGConstants.SVG_CX_ATTRIBUTE == name) {
222:                    return cx;
223:                } else if (SVGConstants.SVG_CY_ATTRIBUTE == name) {
224:                    return cy;
225:                } else if (SVGConstants.SVG_R_ATTRIBUTE == name) {
226:                    return r;
227:                } else {
228:                    return super .getFloatTraitImpl(name);
229:                }
230:            }
231:
232:            /**
233:             * Set the trait value as float array.
234:             *
235:             * @param name the trait's name.
236:             * @param value the trait's value.
237:             *
238:             * @throws DOMException with error code NOT_SUPPORTED_ERROR if the requested
239:             * trait is not supported on this element.
240:             * @throws DOMException with error code TYPE_MISMATCH_ERR if the requested
241:             * trait's value cannot be specified as a float
242:             * @throws DOMException with error code INVALID_ACCESS_ERR if the input
243:             * value is an invalid value for the given trait.
244:             */
245:            void setFloatArrayTrait(final String name, final float[][] value)
246:                    throws DOMException {
247:                if (SVGConstants.SVG_CX_ATTRIBUTE == name) {
248:                    setCx(value[0][0]);
249:                } else if (SVGConstants.SVG_CY_ATTRIBUTE == name) {
250:                    setCy(value[0][0]);
251:                } else if (SVGConstants.SVG_R_ATTRIBUTE == name) {
252:                    setR(value[0][0]);
253:                } else {
254:                    super .setFloatArrayTrait(name, value);
255:                }
256:            }
257:
258:            /**
259:             * Validates the input trait value.
260:             *
261:             * @param traitName the name of the trait to be validated.
262:             * @param value the value to be validated
263:             * @param reqNamespaceURI the namespace of the element requesting 
264:             *        validation.
265:             * @param reqLocalName the local name of the element requesting validation.
266:             * @param reqTraitNamespace the namespace of the trait which has the values
267:             *        value on the requesting element.
268:             * @param reqTraitName the name of the trait which has the values value on 
269:             *        the requesting element.
270:             * @throws DOMException with error code INVALID_ACCESS_ERR if the input
271:             *         value is incompatible with the given trait.
272:             */
273:            public float[][] validateFloatArrayTrait(final String traitName,
274:                    final String value, final String reqNamespaceURI,
275:                    final String reqLocalName, final String reqTraitNamespace,
276:                    final String reqTraitName) throws DOMException {
277:                if (SVGConstants.SVG_CX_ATTRIBUTE == traitName
278:                        || SVGConstants.SVG_CY_ATTRIBUTE == traitName) {
279:                    return new float[][] { { parseFloatTrait(traitName, value) } };
280:                } else if (SVGConstants.SVG_R_ATTRIBUTE == traitName) {
281:                    return new float[][] { { parsePositiveFloatTrait(traitName,
282:                            value) } };
283:                } else {
284:                    return super .validateFloatArrayTrait(traitName, value,
285:                            reqNamespaceURI, reqLocalName, reqTraitNamespace,
286:                            reqTraitName);
287:                }
288:
289:            }
290:
291:            /**
292:             * Supported traits: stroke-width, stroke-miterlimit, stroke-dashoffset,
293:             * fill-rule, stroke-linejoin, stroke-linecap, display, visibility, 
294:             * color, fill, stroke, fill-opacity, stroke-opacity, stroke-dasharray
295:             *
296:             * @param name the name of the trait to set.
297:             * @param value the value of the trait to set.
298:             *
299:             * @throws DOMException with error code NOT_SUPPORTED_ERROR if the requested
300:             * trait is not supported on this element or null.
301:             * @throws DOMException with error code TYPE_MISMATCH_ERR if the requested
302:             * trait's value cannot be specified as a String
303:             * @throws DOMException with error code INVALID_ACCESS_ERR if the input
304:             * value is an invalid value for the given trait or null.
305:             * @throws DOMException with error code NO_MODIFICATION_ALLOWED_ERR: if
306:             * attempt is made to change readonly trait.
307:             */
308:            public void setTraitImpl(final String name, final String value)
309:                    throws DOMException {
310:                if (SVGConstants.SVG_CX_ATTRIBUTE == name) {
311:                    setCx(parseFloatTrait(name, value));
312:                } else if (SVGConstants.SVG_CY_ATTRIBUTE == name) {
313:                    setCy(parseFloatTrait(name, value));
314:                } else if (SVGConstants.SVG_R_ATTRIBUTE == name) {
315:                    setR(parsePositiveFloatTrait(name, value));
316:                } else {
317:                    super .setTraitImpl(name, value);
318:                }
319:            }
320:
321:            /**
322:             * Set the trait value as float.  
323:             *
324:             * Supported float traits: stroke-width, stroke-miterlimit,
325:             * stroke-dashoffset, fill-opacity, stroke-opacity.
326:             *
327:             * @param name the name of the trait to set.
328:             * @param value the value of the trait to set.
329:             *
330:             * @throws DOMException with error code NOT_SUPPORTED_ERROR if the requested
331:             * trait is not supported on this element.
332:             * @throws DOMException with error code TYPE_MISMATCH_ERR if the requested
333:             * trait's value cannot be specified as a float
334:             * @throws DOMException with error code INVALID_ACCESS_ERR if the input
335:             * value is an invalid value for the given trait.
336:             * @throws SecurityException if the application does not have the necessary
337:             * privilege rights to access this (SVG) content.
338:             */
339:            public void setFloatTraitImpl(final String name, final float value)
340:                    throws DOMException {
341:                if (SVGConstants.SVG_CX_ATTRIBUTE == name) {
342:                    setCx(value);
343:                } else if (SVGConstants.SVG_CY_ATTRIBUTE == name) {
344:                    setCy(value);
345:                } else if (SVGConstants.SVG_R_ATTRIBUTE == name) {
346:                    checkPositive(name, value);
347:                    setR(value);
348:                } else {
349:                    super .setFloatTraitImpl(name, value);
350:                }
351:            }
352:
353:            /**
354:             * @param name the name of the trait to convert.
355:             * @param value the float trait value to convert.
356:             */
357:            String toStringTrait(final String name, final float[][] value) {
358:                if (SVGConstants.SVG_CX_ATTRIBUTE == name
359:                        || SVGConstants.SVG_CY_ATTRIBUTE == name
360:                        || SVGConstants.SVG_R_ATTRIBUTE == name) {
361:                    return Float.toString(value[0][0]);
362:                } else {
363:                    return super .toStringTrait(name, value);
364:                }
365:            }
366:
367:            /**
368:             * Computes the paint in user space on use.
369:             *
370:             * @return the computed PaintDef.
371:             */
372:            protected PaintDef computePaint() {
373:                if (computedPaint == null) {
374:                    buildGradientColorMap();
375:                    computedPaint = new RadialGradientPaintDef(cx, cy, cx, cy,
376:                            r, lastColorMapFractions, lastColorMapRGBA,
377:                            RadialGradientPaintDef.CYCLE_NONE, isObjectBBox,
378:                            transform);
379:                }
380:                return computedPaint;
381:            }
382:        }
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