Merge commit '4712d09e9cd62b4bf98634139cee3a3c37ecfe03' as 'imageloader'

imageloader/.gitignore

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+# ---> Java
+*.class
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.ear
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+target/

imageloader/README.md

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+# swing-image-loader
+

imageloader/pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <properties>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+    </properties>
+
+    <groupId>fr.uha.gabalier</groupId>
+    <artifactId>swing-image-loader</artifactId>
+    <version>0.1</version>
+
+
+</project>

imageloader/src/main/java/fr/uha/gabalier/controller/Controller.java

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+package fr.uha.gabalier.controller;
+
+import fr.uha.gabalier.view.View;
+
+public class Controller<T> {
+
+    private T model;
+    private View view;
+
+    protected Controller(T model) {
+        this.model = model;
+    }
+
+    protected T getModel() {
+        return model;
+    }
+
+    protected void setModel(T model) {
+        this.model = model;
+    }
+
+    protected View getView() {
+        return view;
+    }
+
+    public void setView(View v) {
+        this.view = v;
+    }
+}

imageloader/src/main/java/fr/uha/gabalier/controller/ImageController.java

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+package fr.uha.gabalier.controller;
+
+import fr.uha.gabalier.view.Preview;
+import fr.uha.gabalier.view.View;
+
+import java.awt.*;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.util.List;
+
+public class ImageController<T> extends Controller<List<Image>> implements ActionListener {
+
+    private int index;
+
+    public ImageController(List<Image> newModel) {
+        super(newModel);
+        this.index = 0;
+    }
+
+    @Override
+    public void actionPerformed(ActionEvent evt) {
+        switch (evt.getActionCommand()) {
+            case Preview.LEFT_COMMAND :
+                doLeft();
+                break;
+            case Preview.RIGHT_COMMAND:
+                doRight();
+                break;
+        }
+    }
+
+    private void doRight() {
+        if (getModel() == null) return;
+        if (getModel().size() == 0) return;
+        if (++index > getModel().size() - 1) index = 0;
+        getView().repaint();
+    }
+
+    private void doLeft() {
+        if (getModel() == null) return;
+        if (getModel().size() == 0) return;
+        if (--index < 0) index = getModel().size() - 1;
+        getView().repaint();
+    }
+
+    public int getIndex() {
+        return index;
+    }
+
+    public void resetIndex() {
+        this.index = 0;
+    }
+
+    public void setModel(List<Image> model) {
+        super.setModel(model);
+        this.index = 0;
+    }
+}

imageloader/src/main/java/fr/uha/gabalier/core/ImageLoader.java

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+package fr.uha.gabalier.core;
+
+import fr.uha.gabalier.util.ImageLib;
+import fr.uha.gabalier.view.Preview;
+
+import javax.swing.*;
+import java.awt.*;
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CancellationException;
+import java.util.concurrent.ExecutionException;
+
+public class ImageLoader extends SwingWorker<List<Image>, Integer> {
+
+    private final File root;
+    private Preview app;
+    private List<Image> images;
+    private final int iconWidth;
+
+    public ImageLoader(Preview app, int iconWidth, File root) {
+        this.root = root;
+        this.app = app;
+        this.iconWidth = iconWidth;
+        this.images = new ArrayList<>();
+    }
+
+    private void loadImages(File current) throws NullPointerException {
+        if (current.isFile()) {
+            final Image icon = ImageLib.createScaledImage(current, this.iconWidth, -1);
+            if (icon != null) {
+                images.add(icon);
+                publish(images.size());
+            }
+            return;
+        }
+
+        final File[] files = current.listFiles();
+        if (files == null) throw new NullPointerException();
+        for (File f : files) {
+            loadImages(f);
+        }
+    }
+
+    @Override
+    protected List<Image> doInBackground() throws Exception {
+        loadImages(root);
+        return images;
+    }
+
+    @Override
+    protected void process(List<Integer> data) {
+        if (this.isCancelled()) return;
+        app.setStatus(String.valueOf(data.get(data.size() - 1)) + " images loaded");
+    }
+
+    @Override
+    protected void done() {
+        try {
+            app.setModel(this.get());
+            app.setStatus(app.getModel().size() + " images loaded");
+        } catch (CancellationException e) {
+            app.setStatus("Cancelled");
+        } catch (InterruptedException | ExecutionException e) {
+            e.printStackTrace();
+        } finally {
+            app.postLoad();
+        }
+    }
+}

imageloader/src/main/java/fr/uha/gabalier/util/ImageLib.java

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+package fr.uha.gabalier.util;
+
+import javax.imageio.ImageIO;
+import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.IOException;
+
+public final class ImageLib {
+
+    public static Image createScaledImage(File file, int iconWidth, int iconHeight) {
+        final BufferedImage img;
+        try {
+            if ((img = ImageIO.read(file)) != null) {
+                return img.getScaledInstance(iconWidth, iconHeight, Image.SCALE_DEFAULT);
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    private ImageLib() {}
+}

imageloader/src/main/java/fr/uha/gabalier/view/ImageView.java

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+package fr.uha.gabalier.view;
+
+import fr.uha.gabalier.controller.ImageController;
+
+import java.awt.*;
+import java.util.List;
+
+public class ImageView extends View<List<Image>> {
+
+    public ImageView(List<Image> model) {
+        super(model);
+        this.setPreferredSize(new Dimension(Preview.VIEW_WIDTH, Preview.VIEW_HEIGHT));
+    }
+
+    @Override
+    public void paintComponent(Graphics g) {
+        super.paintComponent(g);
+        final List<Image> model = this.getModel();
+        if (model == null) return;
+        if (model.size() == 0) return;
+
+        final int index = ((ImageController) this.getController()).getIndex();
+        g.drawImage(model.get(index), 10, 10, this);
+    }
+}

imageloader/src/main/java/fr/uha/gabalier/view/Preview.java

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+package fr.uha.gabalier.view;
+
+import fr.uha.gabalier.controller.ImageController;
+import fr.uha.gabalier.core.ImageLoader;
+
+import javax.swing.*;
+import java.awt.*;
+import java.awt.event.InputEvent;
+import java.awt.event.KeyEvent;
+import java.util.ArrayList;
+import java.util.List;
+
+public class Preview extends JFrame {
+
+    static final int VIEW_WIDTH = 256;
+    static final int VIEW_HEIGHT = 128;
+
+    public static final String LEFT_COMMAND = "<";
+    public static final String RIGHT_COMMAND = ">";
+    private static final int ICON_WIDTH = 256;
+
+    private List<Image> model;
+    private ImageLoader loader;
+    private ImageView imageView;
+
+    // UI elements
+    private JMenuItem loadItem;
+    private JMenuItem cancelItem;
+    private JButton rightNavButton;
+    private JButton leftNavButton;
+    private final JTextField statusText;
+
+    public Preview() throws HeadlessException {
+        model = new ArrayList<>();
+        // UI elements
+        JMenuBar menuBar = new JMenuBar();
+        setJMenuBar(menuBar);
+        JMenu fileMenu = new JMenu("File");
+        menuBar.add(fileMenu);
+
+        loadItem = new JMenuItem("Load");
+        fileMenu.add(loadItem);
+        loadItem.addActionListener(actionEvent -> doLoad());
+        cancelItem = new JMenuItem("Cancel");
+        fileMenu.add(cancelItem);
+        cancelItem.addActionListener(actionEvent -> doCancel());
+        final JMenuItem exitItem = new JMenuItem("Exit");
+        exitItem.addActionListener(actionEvent -> doExit());
+        exitItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_Q, InputEvent.CTRL_DOWN_MASK));
+        fileMenu.add(exitItem);
+
+        setLayout(new BoxLayout(getContentPane(), BoxLayout.Y_AXIS));
+
+        imageView = new ImageView(model);
+        final ImageController controller = new ImageController(model);
+        imageView.setController(controller);
+        controller.setView(imageView);
+        getContentPane().add(imageView);
+
+        final JPanel navPanel = new JPanel();
+        getContentPane().add(navPanel);
+        leftNavButton = new JButton(LEFT_COMMAND);
+        leftNavButton.addActionListener(controller);
+        navPanel.add(leftNavButton);
+        rightNavButton = new JButton(RIGHT_COMMAND);
+        rightNavButton.addActionListener(controller);
+        navPanel.add(rightNavButton);
+
+        final JPanel statusPanel = new JPanel();
+        getContentPane().add(statusPanel);
+        statusText = new JTextField("0000 images loaded");
+        statusPanel.add(new JLabel("status :"));
+        statusPanel.add(statusText);
+
+        pack();
+        setVisible(true);
+    }
+
+    public void setModel(List<Image> images) {
+        this.model.clear();
+        this.model.addAll(images);
+        ((ImageController) imageView.getController()).resetIndex();
+    }
+
+    public List<Image> getModel() {
+        return model;
+    }
+
+    public void setStatus(String status) {
+        this.statusText.setText(status);
+    }
+
+    private void doLoad() {
+        final JFileChooser fc = new JFileChooser();
+        fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
+        final int ret = fc.showOpenDialog(this);
+        if (ret == JFileChooser.APPROVE_OPTION) {
+            loader = new ImageLoader(this, ICON_WIDTH, fc.getSelectedFile());
+            preLoad();
+            loader.execute();
+        }
+    }
+
+    private void doExit() {
+        System.exit(0);
+    }
+
+    private void doCancel() {
+        loader.cancel(true);
+    }
+
+    public void preLoad() {
+        loadItem.setEnabled(false);
+        cancelItem.setEnabled(true);
+        rightNavButton.setEnabled(false);
+        leftNavButton.setEnabled(false);
+    }
+
+    public void postLoad() {
+        loadItem.setEnabled(true);
+        cancelItem.setEnabled(false);
+        rightNavButton.setEnabled(true);
+        leftNavButton.setEnabled(true);
+    }
+
+    public static void main(String[] args) {
+        EventQueue.invokeLater(Preview::new);
+    }
+
+}

imageloader/src/main/java/fr/uha/gabalier/view/View.java

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+package fr.uha.gabalier.view;
+
+import fr.uha.gabalier.controller.Controller;
+
+import javax.swing.*;
+
+public class View<T> extends JPanel {
+
+    private final T model;
+    private Controller controller;
+
+    protected View(T model) {
+        this.model = model;
+    }
+
+    protected T getModel() {
+        return model;
+    }
+
+    protected Controller getController() {
+        return controller;
+    }
+
+    protected void setController(Controller controller) {
+        this.controller = controller;
+    }
+}