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19 package jcckit;
20
21 import java.awt.BorderLayout  ;
22 import java.awt.Canvas ;
23 import java.awt.Component ;
24 import java.awt.Dimension ;
25 import java.awt.Frame ;
26 import java.awt.Graphics ;
27 import java.awt.Image ;
28 import java.awt.event.WindowAdapter ;
29 import java.awt.event.WindowEvent ;
30 import java.util.Properties ;
31
32 import jcckit.data.DataPlot;
33 import jcckit.graphic.GraphPoint;
34 import jcckit.graphic.GraphicalElement;
35 import jcckit.graphic.Renderer;
36 import jcckit.plot.Plot;
37 import jcckit.plot.PlotCanvas;
38 import jcckit.plot.PlotEvent;
39 import jcckit.plot.PlotEventType;
40 import jcckit.renderer.GraphicsRenderer;
41 import jcckit.renderer.Transformation;
42 import jcckit.util.ConfigParameters;
43 import jcckit.util.ConfigParametersBasedConfigData;
44 import jcckit.util.Factory;
45 import jcckit.util.PropertiesBasedConfigData;
46
47
62 public class GraphicsPlotCanvas extends PlotCanvas {
63
64 public static final String BACKGROUND_KEY = "background",
65 FOREGROUND_KEY = "foreground",
66 DOUBLE_BUFFERING_KEY = "doubleBuffering";
67
68
75 protected class GraphicsPainter {
76 private final Component _component;
77 private Image _buffer;
78 private Image _coordinateSystem;
79 private Graphics _bufferGraphics;
80 private Dimension _currentSize;
81
82
86 public GraphicsPainter(Component component) {
87 _component = component;
88 }
89
90
95 public void paint(Graphics g)
96 {
97 Dimension size = _component.getSize();
98 if (size.width <= 0)
99 {
100 size.width = 1;
101 }
102 if (size.height <= 0)
103 {
104 size.height = 1;
105 }
106 if (_reset || !size.equals(_currentSize))
107 {
108 init(size);
109 }
110 Plot plot = getPlot();
112 drawCoordinateSystem(size, plot, g);
113 drawPlot(plot, _doubleBuffering ? _bufferGraphics : g);
114 if (_doubleBuffering)
115 {
116 g.drawImage(_buffer, 0, 0, null);
117 }
118 if (_marker != null)
119 {
120 _marker.renderWith(createRenderer(g));
121 }
122 }
124
125 private void drawPlot(Plot plot, Graphics g)
126 {
127 prepare(g);
128 if (_doubleBuffering)
129 {
130 g.drawImage(_coordinateSystem, 0, 0, null);
131 }
132 Renderer renderer = createRenderer(g);
133 GraphicalElement[] curves = plot.getCurves();
134 for (int i = 0; i < curves.length; i++) {
135 curves[i].renderWith(renderer);
136 }
137 GraphicalElement annotation = plot.getAnnotation();
138 if (annotation != null)
139 {
140 annotation.renderWith(renderer);
141 }
142 if (plot.isLegendVisible()) {
143 plot.getLegend().renderWith(renderer);
144 }
145 }
146
147 private void init(Dimension size)
148 {
149 _reset = false;
150 _currentSize = size;
151 if (_buffer != null)
152 {
153 _buffer.flush();
154 _bufferGraphics.dispose();
155 }
156 if (_doubleBuffering)
157 {
158 _buffer = _component.createImage(size.width, size.height);
159 _bufferGraphics = _buffer.getGraphics();
160 }
161 if (_coordinateSystem != null)
162 {
163 _coordinateSystem.flush();
164 _coordinateSystem = null;
165 }
166 calculateTransformation(size);
167 }
168
169 private void drawCoordinateSystem(Dimension size, Plot plot, Graphics g)
170 {
171 if (_coordinateSystem == null || _doubleBuffering == false)
172 {
173 if (_doubleBuffering)
174 {
175 _coordinateSystem = _component.createImage(size.width, size.height);
176 g = _coordinateSystem.getGraphics();
177 }
178 g.setColor(_component.getBackground());
179 g.fillRect(0, 0, size.width, size.height);
180 g.setColor(_component.getForeground());
181 plot.getCoordinateSystem().renderWith(createRenderer(g));
182 if (_doubleBuffering)
183 {
184 g.dispose();
185 }
186 }
187 }
188
189
193 protected void prepare(Graphics g) {}
194
195
200 protected void calculateTransformation(Dimension size) {
201 _transformation = new Transformation(size.width, size.height,
202 getPaper(), getHorizontalAnchor(), getVerticalAnchor());
203 }
204
205
209 protected Renderer createRenderer(Graphics g) {
210 return ((GraphicsRenderer) Factory.create(_renderer))
211 .init(g, _component, _transformation);
212 }
213 }
214
215
220 protected class GraphicsCanvas extends Canvas {
221
222 protected GraphicsPainter _painter;
223
224
228 public GraphicsCanvas() {
229 super();
230 _painter = new GraphicsPainter(this);
231 }
232
233
234 public void handleEvent(PlotEvent event) {
235 repaint();
236 }
237
238
239 public void update(Graphics g) {
240 paint(g);
241 }
242
243
248 public void paint(Graphics g) {
249 _painter.paint(g);
250 }
251 }
253 private Transformation _transformation;
254 private boolean _reset = true;
255 private boolean _doubleBuffering;
256 private String _renderer = "jcckit.renderer.GraphicsRenderer";
257
258
259 protected GraphicsCanvas _canvas;
260
261 private GraphicalElement _marker;
262
263
286 public GraphicsPlotCanvas(ConfigParameters config) {
287 super(config);
288 createGraphicsCanvas();
289 _doubleBuffering = config.getBoolean(DOUBLE_BUFFERING_KEY, true);
290 _canvas.setBackground(config.getColor(BACKGROUND_KEY,
291 _canvas.getBackground()));
292 _canvas.setForeground(config.getColor(FOREGROUND_KEY,
293 _canvas.getForeground()));
294 }
295
296
301 public void setRenderer(String className) {
302 _renderer = className;
303 }
304
305
309 public void setDoubleBuffering(boolean doubleBuffering)
310 {
311 _doubleBuffering = doubleBuffering;
312 }
313
314
320 public void drawInto(Image image)
321 {
322 _canvas.setSize(image.getWidth(null), image.getHeight(null));
323 _canvas.paint(image.getGraphics());
324 }
325
326
330 protected void createGraphicsCanvas() {
331 _canvas = new GraphicsCanvas();
332 }
333
334
335 public void plotChanged(PlotEvent event) {
336 if (event.getType() == PlotEventType.COODINATE_SYSTEM_CHANGED)
337 {
338 _reset = true;;
339 }
340 _canvas.handleEvent(event);
341 }
342
343
349 public Canvas getGraphicsCanvas() {
350 return _canvas;
351 }
352
353
358 public GraphPoint mapCursorPosition(int x, int y) {
359 return _transformation.transformBack(x, y);
360 }
361
362
367 public void setMarker(GraphicalElement marker)
368 {
369 _marker = marker;
370 }
371
372
380 public static void main(String [] args) throws Exception {
381 run(args, "jcckit.GraphicsPlotCanvas");
382 }
383
384 protected static void run(String [] args, String plotCanvas)
385 throws Exception {
386 if (args.length == 0) {
387 printUsageAndExit(plotCanvas);
388 }
389 String file = args[0];
390 String renderer = null;
391 if (file.equals("-r")) {
392 if (args.length > 2) {
393 renderer = args[1];
394 file = args[2];
395 } else {
396 printUsageAndExit(plotCanvas);
397 }
398 }
399 Properties p = new Properties ();
400 p.put(Factory.CLASS_NAME_KEY, plotCanvas);
401 ConfigParameters config
402 = new ConfigParameters(
403 new ConfigParametersBasedConfigData(
404 new ConfigParameters(new PropertiesBasedConfigData(file)),
405 new ConfigParameters(new PropertiesBasedConfigData(p))));
406 GraphicsPlotCanvas canvas = (GraphicsPlotCanvas) Factory.create(config);
407 if (renderer != null) {
408 canvas.setRenderer(renderer);
409 }
410 canvas.connect(DataPlot.create(config));
411
412 Frame frame = new Frame ("JCCKit: " + file);
413 frame.addWindowListener(new WindowAdapter () {
414 public void windowClosing(WindowEvent event) {
415 System.exit(0);
416 }
417 }
418 );
419 frame.add(canvas.getGraphicsCanvas(), BorderLayout.CENTER);
420 frame.setSize(666, 555);
421 frame.show();
422 }
423
424 private static void printUsageAndExit(String plotCanvas) {
425 System.out.println("Usage: java " + plotCanvas
426 + " [-r <renderer class>] <properties file>");
427 System.exit(0);
428 }
429 }
430
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