first commit

Semester 1/Programming 1/Java/examples/projects/chapter13/imageviewer0-3/ImageViewer.ctxt

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+#BlueJ class context
+comment0.params=
+comment0.target=ImageViewer()
+comment0.text=\n\ Create\ an\ ImageViewer\ show\ it\ on\ screen.\n
+comment1.params=
+comment1.target=void\ openFile()
+comment1.text=\n\ Open\ function\:\ open\ a\ file\ chooser\ to\ select\ a\ new\ image\ file.\n
+comment2.params=
+comment2.target=void\ quit()
+comment2.text=\n\ Quit\ function\:\ quit\ the\ application.\n
+comment3.params=
+comment3.target=void\ makeFrame()
+comment3.text=\n\ Create\ the\ Swing\ frame\ and\ its\ content.\n
+comment4.params=frame
+comment4.target=void\ makeMenuBar(javax.swing.JFrame)
+comment4.text=\n\ Create\ the\ main\ frame's\ menu\ bar.\n\ @param\ frame\ \ \ The\ frame\ that\ the\ menu\ bar\ should\ be\ added\ to.\n
+numComments=5

Semester 1/Programming 1/Java/examples/projects/chapter13/imageviewer0-3/ImageViewer.java

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+import java.awt.*;
+import java.awt.event.*;
+import javax.swing.*;
+
+/**
+ * ImageViewer is the main class of the image viewer application. It builds 
+ * and displays the application GUI.
+ * 
+ * To start the application, create an object of this class.
+ * 
+ * @author Michael Kölling and David J. Barnes.
+ * @version 0.3
+ */
+public class ImageViewer
+{
+    private JFrame frame;
+    
+    /**
+     * Create an ImageViewer show it on screen.
+     */
+    public ImageViewer()
+    {
+        makeFrame();
+    }
+
+
+    // ---- implementation of menu functions ----
+    
+    /**
+     * Open function: open a file chooser to select a new image file.
+     */
+    private void openFile()
+    {
+        // this is some test output, until we do this properly
+        System.out.println("open file");
+    }
+    
+    /**
+     * Quit function: quit the application.
+     */
+    private void quit()
+    {
+        System.exit(0);
+    }
+    
+    // ---- swing stuff to build the frame and all its components ----
+    
+    /**
+     * Create the Swing frame and its content.
+     */
+    private void makeFrame()
+    {
+        frame = new JFrame("ImageViewer");
+        makeMenuBar(frame);
+        
+        Container contentPane = frame.getContentPane();
+        
+        JLabel label = new JLabel("I am a label. I can display some text.");
+        contentPane.add(label);
+
+        // building is done - arrange the components and show
+        frame.pack();
+        frame.setVisible(true);
+    }
+    
+    /**
+     * Create the main frame's menu bar.
+     * @param frame   The frame that the menu bar should be added to.
+     */
+    private void makeMenuBar(JFrame frame)
+    {
+        JMenuBar menubar = new JMenuBar();
+        frame.setJMenuBar(menubar);
+        
+        // create the File menu
+        JMenu fileMenu = new JMenu("File");
+        menubar.add(fileMenu);
+        
+        JMenuItem openItem = new JMenuItem("Open");
+        openItem.addActionListener(e -> openFile());
+        fileMenu.add(openItem);
+
+        JMenuItem quitItem = new JMenuItem("Quit");
+        quitItem.addActionListener(e -> quit());
+        fileMenu.add(quitItem);
+    }
+}

Semester 1/Programming 1/Java/examples/projects/chapter13/imageviewer0-3/README.TXT

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+Project: imageviewer, version 0.3
+Authors: David Barnes and Michael Kölling
+
+This project is part of the material for the book
+
+   Objects First with Java - A Practical Introduction using BlueJ
+   Sixth edition
+   David J. Barnes and Michael Kölling
+   Pearson Education, 2016
+
+It is discussed in chapter 13.
+
+To use this project, create an instance of class ImageViewer.
+For details, refer to the book chapter.

Semester 1/Programming 1/Java/examples/projects/chapter13/imageviewer0-3/package.bluej

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+#BlueJ package file
+objectbench.height=76
+objectbench.width=679
+package.editor.height=369
+package.editor.width=571
+package.editor.x=70
+package.editor.y=80
+package.numDependencies=0
+package.numTargets=1
+package.showExtends=true
+package.showUses=true
+project.charset=UTF-8
+readme.editor.height=534
+readme.editor.width=776
+readme.editor.x=53
+readme.editor.y=23
+target1.editor.height=736
+target1.editor.width=938
+target1.editor.x=231
+target1.editor.y=58
+target1.height=60
+target1.name=ImageViewer
+target1.naviview.expanded=true
+target1.showInterface=false
+target1.type=ClassTarget
+target1.typeParameters=
+target1.width=120
+target1.x=210
+target1.y=130