Source Code Cross Referenced for LLChart2D.java in  » Chart » Chart2D_1.9.6k » net » sourceforge » chart2d » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Chart » Chart2D_1.9.6k » net.sourceforge.chart2d 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         * Chart2D, a java library for drawing two dimensional charts.
003:         * Copyright (C) 2001 Jason J. Simas
004:         *
005:         * This library is free software; you can redistribute it and/or
006:         * modify it under the terms of the GNU Lesser General Public
007:         * License as published by the Free Software Foundation; either
008:         * version 2.1 of the License, or (at your option) any later version.
009:         *
010:         * This library is distributed in the hope that it will be useful,
011:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
012:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013:         * Lesser General Public License for more details.
014:         * You should have received a copy of the GNU Lesser General Public
015:         * License along with this library; if not, write to the Free Software
016:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
017:         *
018:         * The author of this library may be contacted at:
019:         * E-mail:  jjsimas@users.sourceforge.net
020:         * Street Address:  J J Simas, 887 Tico Road, Ojai, CA 93023-3555 USA
021:         */package net.sourceforge.chart2d;
022:
023:        import java.awt.*;
024:        import java.awt.image.*;
025:
026:        /**
027:         * A class for the methods of GraphChart2D charts of the "Labels Left" type.
028:         * A LLChart2D object is one with it's category descriptor labels along the left (or y) axis.
029:         * For example, a horizontal bar chart is a LLChart2D type chart.
030:         * Changes through its set methods are updated upon next repaint() or getImage() calls.
031:         */
032:        public final class LLChart2D extends GraphChart2D {
033:
034:            private boolean needsUpdate;
035:            private LLChartArea chart;
036:            private BufferedImage image;
037:            private Dimension size;
038:            private Dimension imageSize;
039:            private Dimension prefSize;
040:            private boolean customizePrefSize;
041:            private Dimension customPrefSize;
042:
043:            /**
044:             * Creates a LLChart2D object with its defaults.
045:             */
046:            public LLChart2D() {
047:
048:                needsUpdate = true;
049:                chart = new LLChartArea();
050:                size = new Dimension();
051:                imageSize = new Dimension();
052:                prefSize = null;
053:                customizePrefSize = false;
054:                customPrefSize = null;
055:            }
056:
057:            /**
058:             * Sets a custom preferred size for the chart.
059:             * This custom size will override the preferred size calculations that normally occurr.
060:             * If null is passed, the preferred size calculations will be reinstated.
061:             * @param size  The custom preferred size for this chart.
062:             */
063:            public final void setPreferredSize(Dimension size) {
064:
065:                needsUpdate = true;
066:                customizePrefSize = size != null;
067:                customPrefSize = size;
068:                prefSize = null;
069:            }
070:
071:            /**
072:             * Gets a buffered image of the chart.
073:             * @return An image of this chart
074:             */
075:            public final BufferedImage getImage() {
076:
077:                if (getSize().width <= 0 || getSize().height <= 0)
078:                    pack();
079:                else
080:                    updateImage(getSize());
081:
082:                if (!chart.getBackgroundExistence()) {
083:
084:                    Graphics2D imageG2D = image.createGraphics();
085:                    imageG2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
086:                            RenderingHints.VALUE_ANTIALIAS_ON);
087:                    chart.paintComponent(imageG2D);
088:                    Point location = chart.getSizeLocation(chart.MIN);
089:                    imageSize = chart.getSize(chart.MIN);
090:                    image = image.getSubimage(location.x, location.y,
091:                            imageSize.width, imageSize.height);
092:                }
093:
094:                return image;
095:            }
096:
097:            /**
098:             * Gets the preferred size of the chart.
099:             * The preferred size is within the maximum and minimum sizes of the chart.
100:             * Much calculation is performed when calling this method.
101:             * @return The preferred minimum size of the chart.
102:             */
103:            public final Dimension getPreferredSize() {
104:
105:                updateGraphChart2D();
106:
107:                if (!customizePrefSize) {
108:
109:                    boolean autoModel = chart.getAutoSize(chart.MAXMODEL);
110:                    boolean autoMin = chart.getAutoSize(chart.MIN);
111:                    chart.setAutoSizes(true, false);
112:                    chart.resetLLChartAreaModel(true);
113:                    chart.setAutoSetLayoutRatios(true);
114:                    chart.setSize(chart.MAX, getMaximumSize());
115:                    BufferedImage image = new BufferedImage(
116:                            getMaximumSize().width, getMaximumSize().height,
117:                            BufferedImage.TYPE_INT_BGR);
118:                    Graphics2D imageG2D = image.createGraphics();
119:                    prefSize = chart.getPrefSize(imageG2D);
120:                    chart.setAutoSizes(autoModel, autoMin);
121:                } else
122:                    prefSize = customPrefSize;
123:
124:                int prefWidth = prefSize.width < getMinimumSize().width ? getMinimumSize().width
125:                        : prefSize.width;
126:                int prefHeight = prefSize.height < getMinimumSize().height ? getMinimumSize().height
127:                        : prefSize.height;
128:                prefSize.setSize(prefWidth, prefHeight);
129:
130:                this .size = prefSize;
131:                chart.resetLLChartAreaModel(true);
132:                chart.setAutoSetLayoutRatios(true);
133:                chart.setSize(chart.MAX, size);
134:                if (!chart.getBackgroundExistence()) {
135:
136:                    image = new BufferedImage(getMaximumSize().width,
137:                            getMaximumSize().height, BufferedImage.TYPE_INT_BGR);
138:                    Graphics2D imageG2D = image.createGraphics();
139:                    imageG2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
140:                            RenderingHints.VALUE_ANTIALIAS_ON);
141:                    chart.updateLLChartArea(imageG2D);
142:                } else {
143:
144:                    image = new BufferedImage(size.width, size.height,
145:                            BufferedImage.TYPE_INT_BGR);
146:                    Graphics2D imageG2D = image.createGraphics();
147:                    imageG2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
148:                            RenderingHints.VALUE_ANTIALIAS_ON);
149:                    chart.paintComponent(imageG2D);
150:                    Point location = chart.getSizeLocation(chart.MIN);
151:                    imageSize = chart.getSize(chart.MIN);
152:                    image = image.getSubimage(location.x, location.y,
153:                            imageSize.width, imageSize.height);
154:                }
155:
156:                needsUpdate = false;
157:
158:                return prefSize;
159:            }
160:
161:            /**
162:             * Causes the object to reinintialize to it's preferred size.
163:             */
164:            public final void pack() {
165:
166:                needsUpdate = true;
167:                setSize(getPreferredSize());
168:            }
169:
170:            /**
171:             * Validates the properties of this object.
172:             * If debug is true then prints a messages indicating whether each property is valid.
173:             * Returns true if all the properties were valid and false otherwise.
174:             * @param debug If true then will print status messages.
175:             * @return If true then valid.
176:             */
177:            public final boolean validate(boolean debug) {
178:
179:                if (debug)
180:                    System.out.println("Validating LLChart2D");
181:
182:                boolean valid = true;
183:
184:                if (!validateGraphChart2D(debug))
185:                    valid = false;
186:
187:                if (debug) {
188:
189:                    if (valid)
190:                        System.out.println("LLChart2D was valid");
191:                    else
192:                        System.out.println("LLChart2D was invalid");
193:                }
194:
195:                return valid;
196:            }
197:
198:            /**
199:             * Paints the chart.
200:             * This is provided for the layout manager to call.
201:             * @param g The graphics context for calculations and painting.
202:             */
203:            public final void paintComponent(Graphics g) {
204:
205:                super .paintComponent(g);
206:                Graphics2D g2D = (Graphics2D) g;
207:
208:                updateImage(getSize());
209:
210:                if (!chart.getBackgroundExistence()) {
211:
212:                    g2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
213:                            RenderingHints.VALUE_ANTIALIAS_ON);
214:                    chart.paintComponent(g2D);
215:                } else
216:                    g2D.drawImage(image, 0, 0, imageSize.width,
217:                            imageSize.height, this );
218:            }
219:
220:            /**
221:             * Gets the LLChartArea of this LLChart2D.
222:             * @return The LLChartArea of this LLChart2D.
223:             */
224:            final TitledArea getObjectArea() {
225:                return chart;
226:            }
227:
228:            /**
229:             * Gets the chart type, LABELS_LEFT.
230:             * @return The type of the chart, LABELS_LEFT.
231:             */
232:            final int getGraphChartType() {
233:                return LABELS_LEFT;
234:            }
235:
236:            private boolean getNeedsUpdate() {
237:
238:                return (needsUpdate || size.width != getSize().width
239:                        || size.height != getSize().height || getNeedsUpdateGraphChart2D());
240:            }
241:
242:            private void updateImage(Dimension size) {
243:
244:                if (prefSize == null)
245:                    getPreferredSize();
246:
247:                if (getNeedsUpdate()) {
248:
249:                    updateGraphChart2D();
250:
251:                    this .size = size;
252:                    chart.setSize(chart.MAX, size);
253:
254:                    if (!chart.getBackgroundExistence()) {
255:
256:                        image = new BufferedImage(getMaximumSize().width,
257:                                getMaximumSize().height,
258:                                BufferedImage.TYPE_INT_BGR);
259:                        Graphics2D imageG2D = image.createGraphics();
260:                        imageG2D.setRenderingHint(
261:                                RenderingHints.KEY_ANTIALIASING,
262:                                RenderingHints.VALUE_ANTIALIAS_ON);
263:                        chart.updateLLChartArea(imageG2D);
264:                    } else {
265:
266:                        image = new BufferedImage(size.width, size.height,
267:                                BufferedImage.TYPE_INT_BGR);
268:                        Graphics2D imageG2D = image.createGraphics();
269:                        imageG2D.setRenderingHint(
270:                                RenderingHints.KEY_ANTIALIASING,
271:                                RenderingHints.VALUE_ANTIALIAS_ON);
272:                        chart.paintComponent(imageG2D);
273:                        Point location = chart.getSizeLocation(chart.MIN);
274:                        imageSize = chart.getSize(chart.MIN);
275:                        image = image.getSubimage(location.x, location.y,
276:                                imageSize.width, imageSize.height);
277:                    }
278:
279:                    needsUpdate = false;
280:                }
281:            }
282:        }
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