|
1
11
12 package org.eclipse.birt.chart.examples.api.viewer;
13
14 import org.eclipse.birt.chart.device.IDeviceRenderer;
15 import org.eclipse.birt.chart.examples.api.script.JavaScriptViewer;
16 import org.eclipse.birt.chart.exception.ChartException;
17 import org.eclipse.birt.chart.factory.GeneratedChartState;
18 import org.eclipse.birt.chart.factory.Generator;
19 import org.eclipse.birt.chart.log.ILogger;
20 import org.eclipse.birt.chart.log.Logger;
21 import org.eclipse.birt.chart.model.Chart;
22 import org.eclipse.birt.chart.model.attribute.Bounds;
23 import org.eclipse.birt.chart.model.attribute.impl.BoundsImpl;
24 import org.eclipse.birt.chart.util.PluginSettings;
25 import org.eclipse.birt.core.exception.BirtException;
26 import org.eclipse.swt.SWT;
27 import org.eclipse.swt.events.PaintEvent;
28 import org.eclipse.swt.events.SelectionEvent;
29 import org.eclipse.swt.graphics.Device;
30 import org.eclipse.swt.graphics.Font;
31 import org.eclipse.swt.graphics.FontMetrics;
32 import org.eclipse.swt.graphics.GC;
33 import org.eclipse.swt.graphics.Image;
34 import org.eclipse.swt.graphics.Point;
35 import org.eclipse.swt.graphics.Rectangle;
36 import org.eclipse.swt.layout.GridData;
37 import org.eclipse.swt.layout.GridLayout;
38 import org.eclipse.swt.layout.RowLayout;
39 import org.eclipse.swt.widgets.Button;
40 import org.eclipse.swt.widgets.Combo;
41 import org.eclipse.swt.widgets.Composite;
42 import org.eclipse.swt.widgets.Display;
43 import org.eclipse.swt.widgets.Label;
44 import org.eclipse.swt.widgets.Shell;
45 import org.eclipse.swt.events.PaintListener;
46 import org.eclipse.swt.events.SelectionListener;
47
48 public class CurveFittingViewer extends Composite implements
49 PaintListener,
50 SelectionListener
51 {
52
53 private IDeviceRenderer idr = null;
54
55 private Chart cm = null;
56
57 private static Combo cbType = null;
58
59 private static Button btn = null;
60
61 private GeneratedChartState gcs = null;
62
63 private boolean bNeedsGeneration = true;
64
65 private static ILogger logger = Logger.getLogger( JavaScriptViewer.class.getName( ) );
66
71 public static void main( String  [] args )
72 {
73 Display display = Display.getDefault( );
74 Shell shell = new Shell( display );
75 shell.setSize( 600, 400 );
76 shell.setLayout( new GridLayout( ) );
77
78 CurveFittingViewer cfViewer = new CurveFittingViewer( shell,
79 SWT.NO_BACKGROUND );
80 cfViewer.setLayoutData( new GridData( GridData.FILL_BOTH ) );
81 cfViewer.addPaintListener( cfViewer );
82
83 Composite cBottom = new Composite( shell, SWT.NONE );
84 cBottom.setLayoutData( new GridData( GridData.FILL_HORIZONTAL ) );
85 cBottom.setLayout( new RowLayout( ) );
86
87 Label la = new Label( cBottom, SWT.NONE );
88
89 la.setText( "Choose: " ); cbType = new Combo( cBottom, SWT.DROP_DOWN | SWT.READ_ONLY );
91 cbType.add( "Bar Chart" ); cbType.add( "Line Chart" ); cbType.add( "Stock Chart" ); cbType.add( "Area Chart" ); cbType.select( 0 );
96
97 btn = new Button( cBottom, SWT.NONE );
98 btn.setText( "Update" ); btn.addSelectionListener( cfViewer );
100
101 shell.open( );
102 while ( !shell.isDisposed( ) )
103 {
104 if ( !display.readAndDispatch( ) )
105 display.sleep( );
106 }
107 display.dispose( );
108 }
109
110
113 CurveFittingViewer( Composite parent, int style )
114 {
115 super( parent, style );
116 final PluginSettings ps = PluginSettings.instance( );
117 try
118 {
119 idr = ps.getDevice( "dv.SWT" ); }
121 catch ( ChartException pex )
122 {
123 logger.log( pex );
124 }
125 cm = PrimitiveCharts.createCFBarChart( );
126 }
127
128
133 public final void paintControl( PaintEvent e )
134 {
135 Rectangle d = this.getClientArea( );
136 Image imgChart = new Image( this.getDisplay( ), d );
137 GC gcImage = new GC( imgChart );
138 idr.setProperty( IDeviceRenderer.GRAPHICS_CONTEXT, gcImage );
139
140 Bounds bo = BoundsImpl.create( 0, 0, d.width, d.height );
141 bo.scale( 72d / idr.getDisplayServer( ).getDpiResolution( ) );
142
143 Generator gr = Generator.instance( );
144 if ( bNeedsGeneration )
145 {
146 bNeedsGeneration = false;
147 try
148 {
149 gcs = gr.build( idr.getDisplayServer( ),
150 cm,
151 bo,
152 null,
153 null,
154 null );
155 }
156 catch ( ChartException ce )
157 {
158 ce.printStackTrace( );
159 }
160 }
161
162 try
163 {
164 gr.render( idr, gcs );
165 GC gc = e.gc;
166 gc.drawImage( imgChart, d.x, d.y );
167 }
168 catch ( ChartException gex )
169 {
170 showException( e.gc, gex );
171 }
172 }
173
174
179 public void widgetSelected( SelectionEvent e )
180 {
181 if ( e.widget.equals( btn ) )
182 {
183 int iSelection = cbType.getSelectionIndex( );
184 switch ( iSelection )
185 {
186 case 0 :
187 cm = PrimitiveCharts.createCFBarChart( );
188 break;
189 case 1 :
190 cm = PrimitiveCharts.createCFLineChart( );
191 break;
192 case 2 :
193 cm = PrimitiveCharts.createCFStockChart( );
194 break;
195 case 3 :
196 cm = PrimitiveCharts.createCFAreaChart( );
197 break;
198 }
199 bNeedsGeneration = true;
200 this.redraw( );
201 }
202 }
203
204
209 public void widgetDefaultSelected( SelectionEvent e )
210 {
211
213 }
214
215 private final void showException( GC g2d, Exception ex )
216 {
217 String sWrappedException = ex.getClass( ).getName( );
218 Throwable th = ex;
219 while ( ex.getCause( ) != null )
220 {
221 ex = (Exception ) ex.getCause( );
222 }
223 String sException = ex.getClass( ).getName( );
224 if ( sWrappedException.equals( sException ) )
225 {
226 sWrappedException = null;
227 }
228
229 String sMessage = null;
230 if ( th instanceof BirtException )
231 {
232 sMessage = ( (BirtException) th ).getLocalizedMessage( );
233 }
234 else
235 {
236 sMessage = ex.getMessage( );
237 }
238
239 if ( sMessage == null )
240 {
241 sMessage = "<null>"; }
243 StackTraceElement [] stea = ex.getStackTrace( );
244 Point d = this.getSize( );
245
246 Device dv = Display.getCurrent( );
247 Font fo = new Font( dv, "Courier", SWT.BOLD, 16 ); g2d.setFont( fo );
249 FontMetrics fm = g2d.getFontMetrics( );
250 g2d.setBackground( dv.getSystemColor( SWT.COLOR_WHITE ) );
251 g2d.fillRectangle( 20, 20, d.x - 40, d.y - 40 );
252 g2d.setForeground( dv.getSystemColor( SWT.COLOR_BLACK ) );
253 g2d.drawRectangle( 20, 20, d.x - 40, d.y - 40 );
254 g2d.setClipping( 20, 20, d.x - 40, d.y - 40 );
255 int x = 25, y = 20 + fm.getHeight( );
256 g2d.drawString( "Exception:", x, y ); x += g2d.textExtent( "Exception:" ).x + 5; g2d.setForeground( dv.getSystemColor( SWT.COLOR_RED ) );
259 g2d.drawString( sException, x, y );
260 x = 25;
261 y += fm.getHeight( );
262 if ( sWrappedException != null )
263 {
264 g2d.setForeground( dv.getSystemColor( SWT.COLOR_BLACK ) );
265 g2d.drawString( "Wrapped In:", x, y ); x += g2d.textExtent( "Wrapped In:" ).x + 5; g2d.setForeground( dv.getSystemColor( SWT.COLOR_RED ) );
268 g2d.drawString( sWrappedException, x, y );
269 x = 25;
270 y += fm.getHeight( );
271 }
272 g2d.setForeground( dv.getSystemColor( SWT.COLOR_BLACK ) );
273 y += 10;
274 g2d.drawString( "Message:", x, y ); x += g2d.textExtent( "Message:" ).x + 5; g2d.setForeground( dv.getSystemColor( SWT.COLOR_BLUE ) );
277 g2d.drawString( sMessage, x, y );
278 x = 25;
279 y += fm.getHeight( );
280 g2d.setForeground( dv.getSystemColor( SWT.COLOR_BLACK ) );
281 y += 10;
282 g2d.drawString( "Trace:", x, y ); x = 40;
284 y += fm.getHeight( );
285 g2d.setForeground( dv.getSystemColor( SWT.COLOR_DARK_GREEN ) );
286 for ( int i = 0; i < stea.length; i++ )
287 {
288 g2d.drawString( stea[i].getClassName( ) + ":" + stea[i].getMethodName( )
290 + "(...):" + stea[i].getLineNumber( ), x, y );
292 x = 40;
293 y += fm.getHeight( );
294 }
295 fo.dispose( );
296 }
297 }
298 |
Popular Tags |
Java API By Example, From Geeks To Geeks.