Java tutorial
/** * Copyright 2010 JBoss Inc * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.drools.examples.conway.ui; import java.awt.BorderLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.util.StringTokenizer; import javax.swing.BorderFactory; import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.Timer; import javax.swing.border.Border; import javax.swing.border.EtchedBorder; import org.drools.examples.conway.AbstractRunConway; import org.drools.examples.conway.CellGrid; import org.drools.examples.conway.CellGridImpl; import org.drools.examples.conway.ConwayApplicationProperties; import org.drools.examples.conway.patterns.ConwayPattern; import com.jgoodies.forms.builder.PanelBuilder; import com.jgoodies.forms.factories.ButtonBarFactory; import com.jgoodies.forms.layout.CellConstraints; import com.jgoodies.forms.layout.FormLayout; import foxtrot.Job; import foxtrot.Worker; /** * @author <a href="mailto:brown_j@ociweb.com">Jeff Brown</a> */ public class ConwayGUI extends JPanel { private static final long serialVersionUID = 510l; private final JButton nextGenerationButton; private final JButton startStopButton; private final JButton clearButton; private final JComboBox patternSelector = new JComboBox(); private final Timer timer; private final CellGrid grid; public ConwayGUI(final int executionControl) { super(new BorderLayout()); final String nextGenerationLabel = ConwayApplicationProperties.getProperty("next.generation.label"); this.nextGenerationButton = new JButton(nextGenerationLabel); final String startLabel = ConwayApplicationProperties.getProperty("start.label"); this.startStopButton = new JButton(startLabel); final String clearLabel = ConwayApplicationProperties.getProperty("clear.label"); this.clearButton = new JButton(clearLabel); //this.grid = new CellGridAgendaGroup( 30, 30 ); this.grid = new CellGridImpl(30, 30, executionControl); final CellGridCanvas canvas = new CellGridCanvas(grid); final JPanel panel = new JPanel(new BorderLayout()); panel.add(BorderLayout.CENTER, canvas); final Border etchedBorder = BorderFactory.createEtchedBorder(EtchedBorder.LOWERED); final Border outerBlankBorder = BorderFactory.createEmptyBorder(5, 5, 5, 5); final Border innerBlankBorder = BorderFactory.createEmptyBorder(5, 5, 5, 5); final Border border = BorderFactory.createCompoundBorder( BorderFactory.createCompoundBorder(outerBlankBorder, etchedBorder), innerBlankBorder); panel.setBorder(border); add(BorderLayout.CENTER, panel); add(BorderLayout.EAST, createControlPanel()); this.nextGenerationButton.addActionListener(new ActionListener() { public void actionPerformed(final ActionEvent e) { Worker.post(new Job() { public Object run() { grid.nextGeneration(); return null; } }); canvas.repaint(); } }); this.clearButton.addActionListener(new ActionListener() { public void actionPerformed(final ActionEvent e) { Worker.post(new Job() { public Object run() { grid.killAll(); return null; } }); canvas.repaint(); } }); final ActionListener timerAction = new ActionListener() { public void actionPerformed(ActionEvent ae) { Worker.post(new Job() { public Object run() { if (!grid.nextGeneration()) { stopTimer(); } return null; } }); canvas.repaint(); } }; this.timer = new Timer(500, timerAction); this.startStopButton.addActionListener(new ActionListener() { public void actionPerformed(final ActionEvent e) { if (ConwayGUI.this.timer.isRunning()) { stopTimer(); } else { startTimer(); } } }); populatePatternSelector(); this.patternSelector.addActionListener(new ActionListener() { public void actionPerformed(final ActionEvent e) { final ConwayPattern pattern = (ConwayPattern) ConwayGUI.this.patternSelector.getSelectedItem(); if (pattern != null) { grid.setPattern(pattern); canvas.repaint(); } } }); this.patternSelector.setSelectedIndex(-1); } public void dispose() { this.grid.dispose(); } private void populatePatternSelector() { final String patternClassNames = ConwayApplicationProperties.getProperty("conway.pattern.classnames"); final StringTokenizer tokenizer = new StringTokenizer(patternClassNames); String className = null; while (tokenizer.hasMoreTokens()) { className = tokenizer.nextToken().trim(); try { final Class<?> clazz = Class.forName(className); if (ConwayPattern.class.isAssignableFrom(clazz)) { this.patternSelector.addItem(clazz.newInstance()); } else { System.err.println("Invalid pattern class name: " + className); } } catch (final Exception e) { System.err.println("An error occurred populating patterns: "); e.printStackTrace(); } } } private void startTimer() { final String stopLabel = ConwayApplicationProperties.getProperty("stop.label"); this.startStopButton.setText(stopLabel); this.nextGenerationButton.setEnabled(false); this.clearButton.setEnabled(false); this.patternSelector.setEnabled(false); this.timer.start(); } private void stopTimer() { this.timer.stop(); final String startLabel = ConwayApplicationProperties.getProperty("start.label"); this.startStopButton.setText(startLabel); this.nextGenerationButton.setEnabled(true); this.clearButton.setEnabled(true); this.patternSelector.setEnabled(true); } private JPanel createControlPanel() { final FormLayout layout = new FormLayout("pref, 3dlu, pref, 3dlu:grow", "pref, 15dlu, pref, 15dlu, pref, 3dlu:grow, pref"); final PanelBuilder builder = new PanelBuilder(layout); final CellConstraints cc = new CellConstraints(); final String title = ConwayApplicationProperties.getProperty("app.title"); builder.addLabel(title, cc.xywh(1, 1, layout.getColumnCount(), 1)); final String info = ConwayApplicationProperties.getProperty("app.description"); builder.addLabel(info, cc.xywh(1, 3, layout.getColumnCount(), 1)); final String patternLabel = ConwayApplicationProperties.getProperty("pattern.label"); builder.addLabel(patternLabel, cc.xy(1, 5)); builder.add(this.patternSelector, cc.xy(3, 5)); final JPanel buttonPanel = ButtonBarFactory.buildLeftAlignedBar(this.nextGenerationButton, this.startStopButton, this.clearButton); builder.add(buttonPanel, cc.xywh(1, 7, layout.getColumnCount(), 1)); final Border etchedBorder = BorderFactory.createEtchedBorder(EtchedBorder.LOWERED); final Border outerBlankBorder = BorderFactory.createEmptyBorder(5, 5, 5, 5); final Border innerBlankBorder = BorderFactory.createEmptyBorder(5, 5, 5, 5); final Border border = BorderFactory.createCompoundBorder( BorderFactory.createCompoundBorder(outerBlankBorder, etchedBorder), innerBlankBorder); builder.setBorder(border); return builder.getPanel(); } public static void main(final String[] args) { final ConwayGUI gui = new ConwayGUI(AbstractRunConway.RULEFLOWGROUP); final String appTitle = ConwayApplicationProperties.getProperty("app.title"); final JFrame f = new JFrame(appTitle); f.setResizable(false); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.getContentPane().add(BorderLayout.CENTER, gui); f.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent we) { gui.dispose(); } }); f.pack(); f.setVisible(true); } }