/** Do the actual muting/unmuting. */
private void doRun() {
if (call != null) {
OperationSetBasicTelephony<?> telephony =
call.getProtocolProvider().getOperationSet(OperationSetBasicTelephony.class);
mute = !mute;
telephony.setMute(call, mute);
// We make sure that the button state corresponds to the mute state.
setSelected(mute);
// If we unmute the microphone and the volume control is set to min,
// make sure that the volume control is restored to the initial
// state.
if (!mute && volumeControl.getVolume() == volumeControl.getMinValue()) {
volumeControl.setVolume((volumeControl.getMaxValue() - volumeControl.getMinValue()) / 2);
}
}
}