Created
October 9, 2012 06:11
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| import javax.swing.*; | |
| import javax.swing.event.ChangeEvent; | |
| import javax.swing.event.ChangeListener; | |
| import java.awt.*; | |
| import java.awt.event.ActionEvent; | |
| import java.awt.event.ActionListener; | |
| public class ImageZoom implements ActionListener, ChangeListener { | |
| private JFrame windowFrame; | |
| private JFileChooser fileChooser; | |
| private ImagePanel imagePanel; | |
| private JSlider zoomSlider; | |
| public static void main(String[] args) { | |
| ImageZoom imageZoom = new ImageZoom(); | |
| imageZoom.createWindow(); | |
| imageZoom.createElements(); | |
| } | |
| public ImageZoom() { | |
| imagePanel = new ImagePanel(); | |
| fileChooser = new JFileChooser(); | |
| zoomSlider = new JSlider(1, 100, 10); | |
| zoomSlider.setName("zoom"); | |
| zoomSlider.addChangeListener(this); | |
| } | |
| public void createWindow() { | |
| windowFrame = new JFrame("Image Zoom"); | |
| windowFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); | |
| windowFrame.setPreferredSize(new Dimension(640, 480)); | |
| windowFrame.setVisible(true); | |
| } | |
| public void createElements() { | |
| JMenu menu; | |
| JMenuItem menuItem; | |
| JMenuBar menuBar = new JMenuBar(); | |
| menu = new JMenu("File"); | |
| menuBar.add(menu); | |
| menuItem = new JMenuItem("Open Image"); | |
| menu.add(menuItem); | |
| menuItem.setActionCommand("openImage"); | |
| menuItem.addActionListener(this); | |
| JPanel uiPanel = new JPanel(); | |
| uiPanel.setLayout(new BoxLayout(uiPanel, BoxLayout.Y_AXIS)); | |
| JSlider rotateSlider = new JSlider(0, 360, 0); | |
| rotateSlider.setName("rotate"); | |
| rotateSlider.addChangeListener(this); | |
| uiPanel.add(imagePanel); | |
| uiPanel.add(zoomSlider); | |
| uiPanel.add(rotateSlider); | |
| windowFrame.add(uiPanel); | |
| windowFrame.setJMenuBar(menuBar); | |
| windowFrame.pack(); | |
| } | |
| @Override | |
| public void actionPerformed(ActionEvent event) { | |
| if(event.getActionCommand() == "openImage") { | |
| int returnValue = fileChooser.showOpenDialog(windowFrame); | |
| if(returnValue == JFileChooser.APPROVE_OPTION) { | |
| zoomSlider.setValue(10); | |
| imagePanel.loadImage(fileChooser.getSelectedFile().getPath()); | |
| } | |
| } | |
| } | |
| @Override | |
| public void stateChanged(ChangeEvent e) { | |
| JSlider slider = (JSlider) e.getSource(); | |
| if(slider.getName() == "zoom") { | |
| imagePanel.zoom(getZoomAsFloat()); | |
| } | |
| if(slider.getName() == "rotate") { | |
| imagePanel.rotate(slider.getValue()); | |
| } | |
| } | |
| private float getZoomAsFloat() { | |
| return zoomSlider.getValue() * 0.1f; | |
| } | |
| } |
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