Example usage for java.awt List addItemListener

Introduction

In this page you can find the example usage for java.awt List addItemListener.

Prototype

public synchronized void addItemListener(ItemListener l) 

Source Link

Document

Adds the specified item listener to receive item events from this list.

Usage

From source file:Sampler.java

private void createUI() {
    setFont(new Font("Serif", Font.PLAIN, 12));
    setLayout(new BorderLayout());
    // Set our location to the left of the image frame.
    setSize(200, 350);//from   ww w.java 2s  .  c  o  m
    Point pt = mImageFrame.getLocation();
    setLocation(pt.x - getSize().width, pt.y);

    final Checkbox accumulateCheckbox = new Checkbox("Accumulate", false);
    final Label statusLabel = new Label("");

    // Make a sorted list of the operators.
    Enumeration e = mOps.keys();
    Vector names = new Vector();
    while (e.hasMoreElements())
        names.addElement(e.nextElement());
    Collections.sort(names);
    final java.awt.List list = new java.awt.List();
    for (int i = 0; i < names.size(); i++)
        list.add((String) names.elementAt(i));
    add(list, BorderLayout.CENTER);

    // When an item is selected, do the corresponding transformation.
    list.addItemListener(new ItemListener() {
        public void itemStateChanged(ItemEvent ie) {
            if (ie.getStateChange() != ItemEvent.SELECTED)
                return;
            String key = list.getSelectedItem();
            BufferedImageOp op = (BufferedImageOp) mOps.get(key);
            BufferedImage source = mSplitImageComponent.getSecondImage();
            boolean accumulate = accumulateCheckbox.getState();
            if (source == null || accumulate == false)
                source = mSplitImageComponent.getImage();
            String previous = mImageFrame.getTitle() + " + ";
            if (accumulate == false)
                previous = "";
            mImageFrame.setTitle(previous + key);
            statusLabel.setText("Performing " + key + "...");
            list.setEnabled(false);
            accumulateCheckbox.setEnabled(false);
            BufferedImage destination = op.filter(source, null);
            mSplitImageComponent.setSecondImage(destination);
            mSplitImageComponent.setSize(mSplitImageComponent.getPreferredSize());
            mImageFrame.setSize(mImageFrame.getPreferredSize());
            list.setEnabled(true);
            accumulateCheckbox.setEnabled(true);
            statusLabel.setText("Performing " + key + "...done.");
        }
    });

    Button loadButton = new Button("Load...");
    loadButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent ae) {
            FileDialog fd = new FileDialog(Sampler.this);
            fd.show();
            if (fd.getFile() == null)
                return;
            String path = fd.getDirectory() + fd.getFile();
            mSplitImageComponent.setImage(path);
            mSplitImageComponent.setSecondImage(null);
            //            Utilities.sizeContainerToComponent(mImageFrame,
            //               mSplitImageComponent);
            mImageFrame.validate();
            mImageFrame.repaint();
        }
    });

    Panel bottom = new Panel(new GridLayout(2, 1));
    Panel topBottom = new Panel();
    topBottom.add(accumulateCheckbox);
    topBottom.add(loadButton);
    bottom.add(topBottom);
    bottom.add(statusLabel);
    add(bottom, BorderLayout.SOUTH);

    addWindowListener(new WindowAdapter() {
        public void windowClosing(WindowEvent e) {
            mImageFrame.dispose();
            dispose();
            System.exit(0);
        }
    });
}

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