FileDocCategorySizeDatePackage
UndoableQTEditor.javaAPI DocExample8012Wed Nov 10 12:38:02 GMT 2004com.oreilly.qtjnotebook.ch03

UndoableQTEditor

public class UndoableQTEditor extends Frame implements ActionListener

Fields Summary
Component
comp
Movie
movie
MovieController
controller
Menu
fileMenu
Menu
editMenu
MenuItem
openItem
MenuItem
closeItem
MenuItem
newItem
MenuItem
quitItem
MenuItem
copyItem
MenuItem
cutItem
MenuItem
pasteItem
MenuItem
undoItem
static int
newFrameX
static int
newFrameY
static int
windowCount
Constructors Summary
public UndoableQTEditor()
no-arg constructor for "new" movie

    
              
         
        super ("UndoableQTEditor");
        setLayout (new BorderLayout());
        QTSessionCheck.check();
        movie = new Movie(StdQTConstants.newMovieActive);
        controller = new MovieController (movie);
        controller.enableEditing(true);
        doMyLayout();
    
public UndoableQTEditor(QTFile file)
file-based constructor for opening movies

        super ("UndoableQTEditor");
        setLayout (new BorderLayout());
        QTSessionCheck.check();
        OpenMovieFile omf = OpenMovieFile.asRead (file);
        movie = Movie.fromFile (omf);
        controller = new MovieController (movie);
        controller.enableEditing(true);
        doMyLayout();
    
Methods Summary
public voidactionPerformed(java.awt.event.ActionEvent e)
handles menu actions

        Object source = e.getSource();
        try {
            if (source == quitItem) doQuit();
            else if (source == openItem) doOpen();
            else if (source == closeItem) doClose();
            else if (source == newItem) doNew();
            else if (source == copyItem) doCopy();
            else if (source == cutItem) doCut();
            else if (source == pasteItem) doPaste();
            else if (source == undoItem) doUndo();
        } catch (QTException qte) {
            qte.printStackTrace();
        }
    
public voiddoClose()

        setVisible(false);
        dispose();
        // quit if no windows now showing
        if (--windowCount == 0)
            doQuit();
    
public voiddoCopy()

        Movie copied = controller.copy();
        copied.putOnScrap(0);
    
public voiddoCut()

        Movie cut = controller.cut();
        cut.putOnScrap(0);
    
private voiddoMyLayout()
gets component from controller, makes menus

        // add movie component
        QTComponent qtc =
            QTFactory.makeQTComponent (controller);
        comp = qtc.asComponent();
        add (comp, BorderLayout.CENTER);
        // file menu
        fileMenu = new Menu ("File");
        newItem = new MenuItem ("New Movie");
        newItem.addActionListener (this);
        fileMenu.add (newItem);
        openItem = new MenuItem ("Open Movie...");
        openItem.addActionListener (this);
        fileMenu.add (openItem);
        closeItem = new MenuItem ("Close");
        closeItem.addActionListener (this);
        fileMenu.add (closeItem);
        fileMenu.addSeparator();
        quitItem = new MenuItem ("Quit");
        quitItem.addActionListener (this);
        fileMenu.add(quitItem);
        // edit menu
        editMenu = new Menu ("Edit");
        undoItem = new MenuItem ("Undo");
        undoItem.addActionListener(this);
        editMenu.add(undoItem);
        editMenu.addSeparator();
        copyItem = new MenuItem ("Copy");
        copyItem.addActionListener(this);
        editMenu.add(copyItem);
        cutItem = new MenuItem ("Cut");
        cutItem.addActionListener(this);
        editMenu.add(cutItem);
        pasteItem = new MenuItem ("Paste");
        pasteItem.addActionListener(this);
        editMenu.add(pasteItem);
        // make menu bar
        MenuBar bar = new MenuBar();
        bar.add (fileMenu);
        bar.add (editMenu);
        setMenuBar (bar);
        // add close-button handling
        addWindowListener (new WindowAdapter() {
                public void windowClosing (WindowEvent e) {
                    doClose();
                }
            });
    
public voiddoNew()

        makeNewAndShow();
    
public voiddoOpen()

        QTFile file =
            QTFile.standardGetFilePreview (QTFile.kStandardQTFileTypes);
        Frame f = new UndoableQTEditor (file);
        f.pack();
        if (newFrameX >= 0)
            f.setLocation (newFrameX+=16, newFrameY+=16);
        f.setVisible(true);
        windowCount++;
    
public voiddoPaste()

        controller.paste();
        pack();
    
public voiddoQuit()

        System.exit(0);
    
public voiddoUndo()

        controller.undo();
    
public java.awt.DimensiongetPreferredSize()
Force frame's size to respect movie size

        if (controller == null)
            return new Dimension (0,0);
        try {
            QDRect contRect = controller.getBounds();
            Dimension compDim = comp.getPreferredSize();
            if (contRect.getHeight() > compDim.height) {
                return new Dimension (contRect.getWidth() +
                                      getInsets().left +
                                      getInsets().right,
                                      contRect.getHeight() +
                                      getInsets().top +
                                      getInsets().bottom);

            } else {
                return new Dimension (compDim.width +
                                      getInsets().left +
                                      getInsets().right,
                                      compDim.height +
                                      getInsets().top +
                                      getInsets().bottom);

            }
        } catch (QTException qte) {
            return new Dimension (0,0);
        }
    
public static voidmain(java.lang.String[] args)
opens a single new movie window

        try {
            Frame f = makeNewAndShow();
            // note its x, y for future calls
            newFrameX = f.getLocation().x;
            newFrameY = f.getLocation().y;
        } catch (Exception e) {
            e.printStackTrace();
        }
    
private static java.awt.FramemakeNewAndShow()
creates "new" movie frame, packs and shows. used by main() and "new"

        Frame f = new UndoableQTEditor();
        f.pack();
        if (newFrameX >= 0)
            f.setLocation (newFrameX+=16, newFrameY+=16);
        f.setVisible(true);
        windowCount++;
        return f;