/** * Create preview component. * * @param type type * @param comboBox the options. * @param prefSize the preferred size * @return the component. */ private static Component createPreview(int type, final JComboBox comboBox, Dimension prefSize) { JComponent preview = null; if (type == DeviceConfigurationComboBoxModel.AUDIO) { Object selectedItem = comboBox.getSelectedItem(); if (selectedItem instanceof AudioSystem) { AudioSystem audioSystem = (AudioSystem) selectedItem; if (!NoneAudioSystem.LOCATOR_PROTOCOL.equalsIgnoreCase(audioSystem.getLocatorProtocol())) { preview = new TransparentPanel(new GridBagLayout()); createAudioSystemControls(audioSystem, preview); } } } else if (type == DeviceConfigurationComboBoxModel.VIDEO) { JLabel noPreview = new JLabel( NeomediaActivator.getResources().getI18NString("impl.media.configform.NO_PREVIEW")); noPreview.setHorizontalAlignment(SwingConstants.CENTER); noPreview.setVerticalAlignment(SwingConstants.CENTER); preview = createVideoContainer(noPreview); preview.setPreferredSize(prefSize); Object selectedItem = comboBox.getSelectedItem(); CaptureDeviceInfo device = null; if (selectedItem instanceof DeviceConfigurationComboBoxModel.CaptureDevice) device = ((DeviceConfigurationComboBoxModel.CaptureDevice) selectedItem).info; Exception exception; try { createVideoPreview(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; } } return preview; }