私はウェブカメラ キャプチャ ライブラリと AWT を使用して、ウェブカメラから写真を撮るためのシンプルなインターフェイスを開発しています。ウィンドウを最小化した後、または別のウィンドウをその上に移動した後、JFrame のボタンとコンボボックスが消えます。フレームの上にポインターを移動すると、コンポーネントの可視性が復元されます。私は Java UI に熟練していません。コードの何が問題なのかわかりません。
@SuppressWarnings("serial")
public class ImageCaptureManager extends JFrame {
private class SkipCapture extends AbstractAction {
public SkipCapture() {
super(“Skip”);
}
@Override
public void actionPerformed(ActionEvent e) {
/*SOME CODE HERE*/
}
}
private class SnapMeAction extends AbstractAction {
public SnapMeAction() {
super(“Snap”);
}
@Override
public void actionPerformed(ActionEvent e) {
/*SOME CODE HERE*/
}
}
private class captureCompleted extends AbstractAction {
public captureCompleted() {
super(“Completed”);
}
@Override
public void actionPerformed(ActionEvent e) {
/*SOME CODE HERE*/
}
}
private class saveImage extends AbstractAction {
public saveImage() {
super(“Save”);
}
@Override
public void actionPerformed(ActionEvent e) {
/*SOME CODE HERE*/
}
}
private class deleteImage extends AbstractAction {
public deleteImage() {
super(“Delete”);
}
@Override
public void actionPerformed(ActionEvent e) {
/*SOME CODE HERE*/
}
}
private class StartAction extends AbstractAction implements Runnable {
public StartAction() {
super(“Start”);
}
@Override
public void actionPerformed(ActionEvent e) {
btStart.setEnabled(false);
btSnapMe.setEnabled(true);
executor.execute(this);
}
@Override
public void run() {
panel.start();
}
}
private Executor executor = Executors.newSingleThreadExecutor();
private Dimension captureSize = new Dimension(640, 480);
private Dimension displaySize = new Dimension(640, 480);
private Webcam webcam = Webcam.getDefault();
private WebcamPanel panel;
private JButton btSnapMe = new JButton(new SnapMeAction());
private JButton btStart = new JButton(new StartAction());
private JButton btComplete = new JButton(new captureCompleted());
private JButton btSave = new JButton(new saveImage());
private JButton btDelete = new JButton(new deleteImage());
private JButton btSkip = new JButton(new SkipCapture());
private JComboBox comboBox = new JComboBox();
public ImageCaptureManager() {
super(“Frame”);
this.addWindowListener( new WindowAdapter()
{
@Override
public void windowDeiconified(WindowEvent arg0) {
}
public void windowClosing(WindowEvent e)
{
}
});
List<Webcam> webcams = Webcam.getWebcams();
for (Webcam webcam : webcams) {
System.out.println(webcam.getName());
if (webcam.getName().startsWith("USB2.0 Camera 1")) {
this.webcam = webcam;
break;
}
}
panel = new WebcamPanel(webcam, displaySize, false);
webcam.setViewSize(captureSize);
panel.setFPSDisplayed(true);
panel.setFillArea(true);
btSnapMe.setEnabled(false);
btSave.setEnabled(false);
btDelete.setEnabled(false);
setLayout(new FlowLayout());
Panel buttonPanel = new Panel();
buttonPanel.setLayout(new GridLayout(10, 1));
buttonPanel.add(Box.createHorizontalStrut(20));
buttonPanel.add(btSnapMe);
buttonPanel.add(Box.createHorizontalStrut(20));
buttonPanel.add(btSave);
buttonPanel.add(Box.createHorizontalStrut(20));
buttonPanel.add(btDelete);
buttonPanel.add(Box.createHorizontalStrut(20));
buttonPanel.add(btComplete);
buttonPanel.add(Box.createHorizontalStrut(20));
buttonPanel.add(btSkip);
JLabel label1 = new JLabel("Test");
label1.setText(“Bla bla bla”);
JLabel label2 = new JLabel("Test");
label2.setText(" ");
Panel captionAndWebcamPanel = new Panel();
captionAndWebcamPanel.add(label1);
captionAndWebcamPanel.add(label2);
captionAndWebcamPanel.add(panel);
captionAndWebcamPanel.add(label2);
captionAndWebcamPanel.add(comboBox);
captionAndWebcamPanel.setLayout(new BoxLayout(captionAndWebcamPanel, BoxLayout.Y_AXIS));
add(captionAndWebcamPanel);
add(buttonPanel);
pack();
setVisible(true);
setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
btStart.doClick();
setSize(900,600);
}
}