/**
* Creates the buttons panel.
*
* @return the buttons panel
*/
private Component createButtonsPanel() {
JPanel buttonsPanel = new TransparentPanel(new FlowLayout(FlowLayout.RIGHT));
JButton okButton = new JButton(GuiActivator.getResources().getI18NString("service.gui.OK"));
okButton.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
selectedDevice = (MediaDevice) deviceComboBox.getSelectedItem();
dispose();
}
});
buttonsPanel.add(okButton);
cancelButton.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
selectedDevice = null;
dispose();
}
});
buttonsPanel.add(cancelButton);
return buttonsPanel;
}
/**
* A dialog dedicated to desktop streaming/sharing. Shows the possible screens to select from to use
* for the streaming/sharing session.
*
* @author Yana Stamcheva
*/
public class SelectScreenDialog extends SIPCommDialog {
/** Serial version UID. */
private static final long serialVersionUID = 0L;
/** The object used for logging. */
private static final Logger logger = Logger.getLogger(SelectScreenDialog.class);
/** The combo box containing screen choice. */
private final JComboBox deviceComboBox;
/** The cancel button of this dialog. */
private final JButton cancelButton =
new JButton(GuiActivator.getResources().getI18NString("service.gui.CANCEL"));
/**
* The video <code>CaptureDeviceInfo</code> this instance started to create the preview of.
*
* <p>Because the creation of the preview is asynchronous, it's possible to request the preview of
* one and the same device multiple times. Which may lead to failures because of, for example,
* busy devices and/or resources (as is the case with LTI-CIVIL and video4linux2).
*/
private static MediaDevice videoDeviceInPreview;
/** The selected media device. */
private MediaDevice selectedDevice;
/**
* Creates an instance of <tt>SelectScreenDialog</tt> by specifying the list of possible desktop
* devices to choose from.
*
* @param desktopDevices the list of possible desktop devices to choose from
*/
public SelectScreenDialog(List<MediaDevice> desktopDevices) {
setModal(true);
setPreferredSize(new Dimension(400, 300));
Container contentPane = getContentPane();
contentPane.setLayout(new BorderLayout());
deviceComboBox = new JComboBox(desktopDevices.toArray());
contentPane.add(deviceComboBox, BorderLayout.NORTH);
deviceComboBox.setRenderer(new ComboRenderer());
contentPane.add(createPreview(deviceComboBox));
contentPane.add(createButtonsPanel(), BorderLayout.SOUTH);
}
/**
* Returns the selected device.
*
* @return the selected device
*/
public MediaDevice getSelectedDevice() {
return selectedDevice;
}
/**
* Creates the buttons panel.
*
* @return the buttons panel
*/
private Component createButtonsPanel() {
JPanel buttonsPanel = new TransparentPanel(new FlowLayout(FlowLayout.RIGHT));
JButton okButton = new JButton(GuiActivator.getResources().getI18NString("service.gui.OK"));
okButton.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
selectedDevice = (MediaDevice) deviceComboBox.getSelectedItem();
dispose();
}
});
buttonsPanel.add(okButton);
cancelButton.addActionListener(
new ActionListener() {
public void actionPerformed(ActionEvent e) {
selectedDevice = null;
dispose();
}
});
buttonsPanel.add(cancelButton);
return buttonsPanel;
}
/**
* Create preview component.
*
* @param comboBox the options.
* @return the component.
*/
private static Component createPreview(final JComboBox comboBox) {
final JComponent preview;
JLabel noPreview =
new JLabel(GuiActivator.getResources().getI18NString("impl.media.configform.NO_PREVIEW"));
noPreview.setHorizontalAlignment(SwingConstants.CENTER);
noPreview.setVerticalAlignment(SwingConstants.CENTER);
preview = createVideoContainer(noPreview);
preview.setPreferredSize(new Dimension(WIDTH, 280));
preview.setMaximumSize(new Dimension(WIDTH, 280));
final ActionListener comboBoxListener =
new ActionListener() {
public void actionPerformed(ActionEvent event) {
MediaDevice device = (MediaDevice) comboBox.getSelectedItem();
if ((device != null) && device.equals(videoDeviceInPreview)) return;
Exception exception;
try {
createPreview(device, preview);
exception = null;
} catch (IOException ex) {
exception = ex;
} catch (MediaException ex) {
exception = ex;
}
if (exception != null) {
logger.error("Failed to create preview for device " + device, exception);
device = null;
}
videoDeviceInPreview = device;
}
};
comboBox.addActionListener(comboBoxListener);
/*
* We have to initialize the controls to reflect the configuration
* at the time of creating this instance. Additionally, because the
* video preview will stop when it and its associated controls
* become unnecessary, we have to restart it when the mentioned
* controls become necessary again. We'll address the two goals
* described by pretending there's a selection in the video combo
* box when the combo box in question becomes displayable.
*/
comboBox.addHierarchyListener(
new HierarchyListener() {
public void hierarchyChanged(HierarchyEvent event) {
if (((event.getChangeFlags() & HierarchyEvent.DISPLAYABILITY_CHANGED) != 0)
&& comboBox.isDisplayable()) {
// let current changes end their execution
// and after that trigger action on combobox
SwingUtilities.invokeLater(
new Runnable() {
public void run() {
comboBoxListener.actionPerformed(null);
}
});
} else {
if (!comboBox.isDisplayable()) videoDeviceInPreview = null;
}
}
});
return preview;
}
/**
* Creates preview for the device(video) in the video container.
*
* @param device the device
* @param videoContainer the container
* @throws IOException a problem accessing the device.
* @throws MediaException a problem getting preview.
*/
private static void createPreview(MediaDevice device, final JComponent videoContainer)
throws IOException, MediaException {
videoContainer.removeAll();
videoContainer.revalidate();
videoContainer.repaint();
if (device == null) return;
Component c =
(Component)
GuiActivator.getMediaService()
.getVideoPreviewComponent(
device, videoContainer.getSize().width, videoContainer.getSize().height);
videoContainer.add(c);
}
/**
* Creates the video container.
*
* @param noVideoComponent the container component.
* @return the video container.
*/
private static JComponent createVideoContainer(Component noVideoComponent) {
return new VideoContainer(noVideoComponent, false);
}
/** Custom combo box renderer. */
private static class ComboRenderer extends DefaultListCellRenderer {
@Override
public Component getListCellRendererComponent(
JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
MediaDevice mediaDevice = (MediaDevice) value;
Dimension screenSize = null;
if (mediaDevice != null) screenSize = ((VideoMediaFormat) mediaDevice.getFormat()).getSize();
this.setText(screenSize.width + "x" + screenSize.height);
return this;
}
}
/**
* Automatically press the cancel button when this dialog has been escaped.
*
* @param escaped indicates if this dialog has been closed by pressing the ESC key
*/
@Override
protected void close(boolean escaped) {
if (escaped) cancelButton.doClick();
}
}
/**
* Create preview component.
*
* @param comboBox the options.
* @return the component.
*/
private static Component createPreview(final JComboBox comboBox) {
final JComponent preview;
JLabel noPreview =
new JLabel(GuiActivator.getResources().getI18NString("impl.media.configform.NO_PREVIEW"));
noPreview.setHorizontalAlignment(SwingConstants.CENTER);
noPreview.setVerticalAlignment(SwingConstants.CENTER);
preview = createVideoContainer(noPreview);
preview.setPreferredSize(new Dimension(WIDTH, 280));
preview.setMaximumSize(new Dimension(WIDTH, 280));
final ActionListener comboBoxListener =
new ActionListener() {
public void actionPerformed(ActionEvent event) {
MediaDevice device = (MediaDevice) comboBox.getSelectedItem();
if ((device != null) && device.equals(videoDeviceInPreview)) return;
Exception exception;
try {
createPreview(device, preview);
exception = null;
} catch (IOException ex) {
exception = ex;
} catch (MediaException ex) {
exception = ex;
}
if (exception != null) {
logger.error("Failed to create preview for device " + device, exception);
device = null;
}
videoDeviceInPreview = device;
}
};
comboBox.addActionListener(comboBoxListener);
/*
* We have to initialize the controls to reflect the configuration
* at the time of creating this instance. Additionally, because the
* video preview will stop when it and its associated controls
* become unnecessary, we have to restart it when the mentioned
* controls become necessary again. We'll address the two goals
* described by pretending there's a selection in the video combo
* box when the combo box in question becomes displayable.
*/
comboBox.addHierarchyListener(
new HierarchyListener() {
public void hierarchyChanged(HierarchyEvent event) {
if (((event.getChangeFlags() & HierarchyEvent.DISPLAYABILITY_CHANGED) != 0)
&& comboBox.isDisplayable()) {
// let current changes end their execution
// and after that trigger action on combobox
SwingUtilities.invokeLater(
new Runnable() {
public void run() {
comboBoxListener.actionPerformed(null);
}
});
} else {
if (!comboBox.isDisplayable()) videoDeviceInPreview = null;
}
}
});
return preview;
}