private JComboBox getMixerComboBox() {
if (mixerComboBox == null) {
Mixer.Info[] mixerInfo = AudioSystem.getMixerInfo();
Line.Info clipLineInfo = new Line.Info(Clip.class);
Vector<Mixer.Info> mixers = new Vector<Mixer.Info>();
for (Mixer.Info mi : mixerInfo) {
if (AudioSystem.getMixer(mi).getSourceLineInfo(clipLineInfo).length > 0) {
mixers.add(mi);
}
}
mixerComboBox = new JComboBox(mixers);
mixerComboBox.setRenderer(new MixerInfoCellRenderer());
mixerComboBox.addActionListener(eventHandler);
}
return mixerComboBox;
}
private void mixerComboBoxActionPerformed() {
Mixer mixer = AudioSystem.getMixer((Mixer.Info) mixerComboBox.getSelectedItem());
Line.Info lineInfo = mixer.getSourceLineInfo(new Line.Info(Clip.class))[0];
boolean volumeSupported;
boolean panSupported;
try {
Line line = mixer.getLine(lineInfo);
volumeSupported = line.isControlSupported(FloatControl.Type.MASTER_GAIN);
panSupported = line.isControlSupported(FloatControl.Type.PAN);
} catch (LineUnavailableException e) {
volumeSupported = false;
panSupported = false;
}
enableMixerVolumeCheckBox.setEnabled(volumeSupported);
enableMixerPanCheckBox.setEnabled(panSupported);
}