init

data-WrongDataFormat.photo

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+mountains;0;0;JPEG;1024;768
+wrongFormatWidthMissing;0;0;JPEG;
+church;0;0;RAW;800;600
+logo;0;0;GIF;300;300
+logo-large;0;0;GIF;1200;1200

data-WrongDataFormat2.photo

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+mountains;0;0;JPEG;1024;768
+wrongFormatWidthNoInteger;0;0;JPEG;ABC;DEF

data.photo

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+mountains;0;0;JPEG;1024;768
+sunset01;0;0;JPEG;800;600
+church;0;0;RAW;800;600
+logo;0;0;GIF;300;300
+logo-large;0;0;GIF;1200;1200

src/Foto.java

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+public class Foto {
+    private String name;
+    private int ref1;
+    private int ref2;
+    private int height;
+    private int width;
+    private String fileformat;
+
+    public Foto(String name, int ref1, int ref2, int height, int width, String fileformat) {
+        this.name = name;
+        this.ref1 = ref1;
+        this.ref2 = ref2;
+        this.height = height;
+        this.width = width;
+        this.fileformat = fileformat;
+    }
+
+    public Foto() { }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getRef1() {
+        return ref1;
+    }
+
+    public int getRef2() {
+        return ref2;
+    }
+
+    public int getHeight() {
+        return height;
+    }
+
+    public int getWidth() {
+        return width;
+    }
+
+    public String getFileformat() {
+        return fileformat;
+    }
+}

src/MediaController.java

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+import javax.swing.*;
+import javax.swing.event.ListSelectionEvent;
+import javax.swing.event.ListSelectionListener;
+import javax.swing.filechooser.FileNameExtensionFilter;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.io.*;
+import java.util.ArrayList;
+import java.util.Collection;
+
+public class MediaController implements ActionListener, ListSelectionListener {
+    MediaView mv = new MediaView(this, this);
+    //TODO: Collection für Fotos einfügen
+    Collection<Foto> fotocollection = new ArrayList<>();
+
+
+    /**
+     * Controller - nichts zu tun
+     */
+    public MediaController() {
+        // nichts zu tun
+        mv.setPhotoList(getNamesPhoto());
+        mv.display();
+    }
+
+    /**
+     * Aus der Collection müssen alle Namen in ein String[] kopiert werden
+     *
+     * @return String[] mit allen Namen
+     */
+    String[] getNamesPhoto() {
+        String[] strar = new String[fotocollection.size()];
+
+        int i = 0;
+        for (Foto ft: fotocollection) {
+             strar[i] = ft.getName();
+             i++;
+        }
+
+        return strar;
+    }
+
+    @Override
+    /**
+     * Actionlistener - muss ausprogrammiert werden
+     */
+    public void actionPerformed(ActionEvent e) {
+        System.out.println(e.getActionCommand());
+        if (e.getActionCommand() == "Laden") {
+            JFileChooser chooser = new JFileChooser(new File("."));
+            FileNameExtensionFilter filter = new FileNameExtensionFilter("Images", "photo");
+            chooser.setFileFilter(filter);
+            int returnVal = chooser.showOpenDialog(mv);
+            if (returnVal == JFileChooser.APPROVE_OPTION) {
+                System.out.println("You chose to open this file: " + chooser.getSelectedFile().getName());
+
+                File myfile = new File(chooser.getSelectedFile().getName());
+                try {
+                    BufferedReader reader = new BufferedReader(new FileReader(myfile));
+                    while (reader.ready()) {
+                        String line = reader.readLine();
+                        String[] spl = line.split(";");
+
+                        if (spl.length != 6)
+                            throw new WrongFileFormatException("invaild number of columns");
+
+                        try {
+                            Foto ft = new Foto(spl[0],
+                                    Integer.parseInt(spl[1]),
+                                    Integer.parseInt(spl[2]),
+                                    Integer.parseInt(spl[4]),
+                                    Integer.parseInt(spl[5]),
+                                    spl[3]);
+
+                            fotocollection.add(ft);
+                        } catch (NumberFormatException ee) {
+                            throw new WrongFileFormatException("parse error- no integer in file column");
+                        }
+                    }
+
+                } catch (FileNotFoundException fileNotFoundException) {
+                    fileNotFoundException.printStackTrace();
+                } catch (IOException ioException) {
+                    ioException.printStackTrace();
+                } catch (WrongFileFormatException en) {
+                    System.err.println("an File Format exception occured: "+en.getMessage());
+                }
+
+            }
+            // TODO: Datei auswählen und die Daten in die Collection laden
+        } else if (e.getActionCommand() == "Grafik") {
+            // TODO: die Häufigkeiten der Fotoformate muss berechnet werden
+            //    und an die Methode displayGraph übergeben werden
+
+            //	mv.displayGraph(???);
+        }
+
+    }
+
+    @Override
+    /**
+     * ListSelectionListener - wenn sich die
+     */
+    public void valueChanged(ListSelectionEvent e) {
+        // TODO: die Daten zum ausgewähltem Foto müssen mit setData angezeigt werden
+
+        // mv.setData(???);
+    }
+
+}

src/MediaControllerMain.java

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+
+public class MediaControllerMain {
+	public static void main(String[] args) {
+		MediaController mc = new MediaController();
+
+	}
+
+}

src/MediaView.java

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+import java.awt.BorderLayout;
+import java.awt.GridLayout;
+import java.awt.ScrollPane;
+import java.awt.event.ActionListener;
+
+import javax.swing.DefaultListModel;
+import javax.swing.JButton;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.JList;
+import javax.swing.JPanel;
+import javax.swing.event.ListSelectionListener;
+
+public class MediaView extends JFrame {
+	JList<String> photoList = new JList<>();
+	JButton btnLoad = new JButton("Laden");
+	JButton btnGraph = new JButton("Grafik");
+	
+	JPanel ctrlPanel = new JPanel();
+	JPanel photoPanel = new JPanel(new BorderLayout());
+	JPanel graphPanel = new JPanel();
+	
+	JLabel lblStatus = new JLabel("Data: ");
+	
+	/**
+	 * Konstruktor 
+	 * @param al
+	 * @param lsl
+	 */
+	public MediaView(ActionListener al, ListSelectionListener lsl) {
+		this.setTitle("ihren Namen");
+
+		photoPanel.add(new JLabel("Fotos:"),BorderLayout.NORTH);
+		photoPanel.add(new ScrollPane().add(photoList));
+		photoList.addListSelectionListener(lsl);
+		
+		ctrlPanel.add(btnLoad);
+		ctrlPanel.add(btnGraph);
+		btnLoad.addActionListener(al);
+		btnGraph.addActionListener(al);
+		
+		this.getContentPane().add(photoPanel, BorderLayout.WEST);
+		this.getContentPane().add(graphPanel);
+		this.getContentPane().add(ctrlPanel, BorderLayout.NORTH);
+		this.getContentPane().add(lblStatus, BorderLayout.SOUTH);
+	}
+
+	/**
+	 * Einf<EFBFBD>gen der <EFBFBD>bergebenen Namen in die JList
+	 * @param namesPhoto
+	 */
+	public void setPhotoList(String[] namesPhoto) {
+		// nichts ver<EFBFBD>ndern
+		if (namesPhoto != null){
+			DefaultListModel listModel = (DefaultListModel) photoList.getModel();
+	        listModel.removeAllElements();
+			photoList.setListData(namesPhoto);
+		}
+	}
+
+	/**
+	 * Frame anzeigen
+	 */
+	public void display() {
+		// nichts ver<EFBFBD>ndern
+		this.setSize(600,530);
+		this.setVisible(true);
+		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+	}
+
+	/**
+	 * Daten eines Fotos in der Statuszeile der View anzeigen
+	 * @param photoType ... Datentyp (als String)
+	 * @param width ... Breite des Bildes (int)
+	 * @param height ... H<EFBFBD>he des Bildes (int)
+	 */
+	public void setData(String photoType, int width, int height) {
+		// nichts ver<EFBFBD>ndern
+		lblStatus.setText( String.format("Typ: %s, Bildgr<67><72>e: (%d,%d)", photoType, width, height));
+	}
+
+	/**
+	 * Erstellen eines Kuchendiagrammes mit 3 Segmenten. Die 3 Parameter
+	 * geben die H<EFBFBD>ufigkeiten der Bildtypen an
+	 * @param raw
+	 * @param jpeg
+	 * @param gif
+	 */
+	public void displayGraph(float raw, float jpeg, float gif) {
+		// TODO: Kuchendiagramm erzeugen und in graphPanel einf<EFBFBD>gen
+		//this.graphPanel.add(???);
+		
+		// zum Neuzeichnen der Anwendung nach dem Einf<EFBFBD>gen - nicht <EFBFBD>ndern!
+		this.getContentPane().validate();
+		this.getContentPane().repaint();
+	}
+}

src/WrongFileFormatException.java

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+public class WrongFileFormatException extends RuntimeException {
+    public WrongFileFormatException(String message) {
+        super(message);
+    }
+}