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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.settings;
import android.preference.Preference;
import android.preference.PreferenceCategory;
import android.preference.PreferenceGroup;
import android.speech.tts.TtsEngines;
import com.android.settings.voice.VoiceInputHelper;
/**
* Settings screen for voice input/output.
*/
public class VoiceInputOutputSettings {
private static final String TAG = "VoiceInputOutputSettings";
private static final String KEY_VOICE_CATEGORY = "voice_category";
private static final String KEY_VOICE_INPUT_SETTINGS = "voice_input_settings";
private static final String KEY_TTS_SETTINGS = "tts_settings";
private PreferenceGroup mParent;
private PreferenceCategory mVoiceCategory;
private Preference mVoiceInputSettingsPref;
private Preference mTtsSettingsPref;
private final SettingsPreferenceFragment mFragment;
private final TtsEngines mTtsEngines;
public VoiceInputOutputSettings(SettingsPreferenceFragment fragment) {
mFragment = fragment;
mTtsEngines = new TtsEngines(fragment.getPreferenceScreen().getContext());
}
public void onCreate() {
mParent = mFragment.getPreferenceScreen();
mVoiceCategory = (PreferenceCategory) mParent.findPreference(KEY_VOICE_CATEGORY);
mVoiceInputSettingsPref = mVoiceCategory.findPreference(KEY_VOICE_INPUT_SETTINGS);
mTtsSettingsPref = mVoiceCategory.findPreference(KEY_TTS_SETTINGS);
populateOrRemovePreferences();
}
private void populateOrRemovePreferences() {
boolean hasVoiceInputPrefs = populateOrRemoveVoiceInputPrefs();
boolean hasTtsPrefs = populateOrRemoveTtsPrefs();
if (!hasVoiceInputPrefs && !hasTtsPrefs) {
// There were no TTS settings and no recognizer settings,
// so it should be safe to hide the preference category
// entirely.
mFragment.getPreferenceScreen().removePreference(mVoiceCategory);
}
}
private boolean populateOrRemoveVoiceInputPrefs() {
VoiceInputHelper helper = new VoiceInputHelper(mFragment.getActivity());
if (!helper.hasItems()) {
mVoiceCategory.removePreference(mVoiceInputSettingsPref);
return false;
}
return true;
}
private boolean populateOrRemoveTtsPrefs() {
if (mTtsEngines.getEngines().isEmpty()) {
mVoiceCategory.removePreference(mTtsSettingsPref);
return false;
}
return true;
}
}
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