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/*
* Copyright (C) 2011 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.tts;
import com.android.settings.R;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.speech.tts.TextToSpeech.EngineInfo;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Checkable;
import android.widget.CompoundButton;
import android.widget.RadioButton;
public class TtsEnginePreference extends Preference {
/**
* Key for the name of the TTS engine passed in to the engine
* settings fragment {@link TtsEngineSettingsFragment}.
*/
static final String FRAGMENT_ARGS_NAME = "name";
/**
* Key for the label of the TTS engine passed in to the engine
* settings fragment. This is used as the title of the fragment
* {@link TtsEngineSettingsFragment}.
*/
static final String FRAGMENT_ARGS_LABEL = "label";
/**
* Key for the voice data data passed in to the engine settings
* fragmetn {@link TtsEngineSettingsFragment}.
*/
static final String FRAGMENT_ARGS_VOICES = "voices";
/**
* The preference activity that owns this preference. Required
* for instantiating the engine specific settings screen.
*/
private final PreferenceActivity mPreferenceActivity;
/**
* The engine information for the engine this preference represents.
* Contains it's name, label etc. which are used for display.
*/
private final EngineInfo mEngineInfo;
/**
* The shared radio button state, which button is checked etc.
*/
private final RadioButtonGroupState mSharedState;
/**
* When true, the change callbacks on the radio button will not
* fire.
*/
private volatile boolean mPreventRadioButtonCallbacks;
private View mSettingsIcon;
private RadioButton mRadioButton;
private Intent mVoiceCheckData;
private final CompoundButton.OnCheckedChangeListener mRadioChangeListener =
new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
onRadioButtonClicked(buttonView, isChecked);
}
};
public TtsEnginePreference(Context context, EngineInfo info, RadioButtonGroupState state,
PreferenceActivity prefActivity) {
super(context);
setLayoutResource(R.layout.preference_tts_engine);
mSharedState = state;
mPreferenceActivity = prefActivity;
mEngineInfo = info;
mPreventRadioButtonCallbacks = false;
setKey(mEngineInfo.name);
setTitle(mEngineInfo.label);
}
@Override
public View getView(View convertView, ViewGroup parent) {
if (mSharedState == null) {
throw new IllegalStateException("Call to getView() before a call to" +
"setSharedState()");
}
View view = super.getView(convertView, parent);
final RadioButton rb = (RadioButton) view.findViewById(R.id.tts_engine_radiobutton);
rb.setOnCheckedChangeListener(mRadioChangeListener);
boolean isChecked = getKey().equals(mSharedState.getCurrentKey());
if (isChecked) {
mSharedState.setCurrentChecked(rb);
}
mPreventRadioButtonCallbacks = true;
rb.setChecked(isChecked);
mPreventRadioButtonCallbacks = false;
mRadioButton = rb;
View textLayout = view.findViewById(R.id.tts_engine_pref_text);
textLayout.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onRadioButtonClicked(rb, !rb.isChecked());
}
});
mSettingsIcon = view.findViewById(R.id.tts_engine_settings);
// Will be enabled only the engine has passed the voice check, and
// is currently enabled.
mSettingsIcon.setEnabled(isChecked && mVoiceCheckData != null);
mSettingsIcon.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Bundle args = new Bundle();
args.putString(FRAGMENT_ARGS_NAME, mEngineInfo.name);
args.putString(FRAGMENT_ARGS_LABEL, mEngineInfo.label);
if (mVoiceCheckData != null) {
args.putParcelable(FRAGMENT_ARGS_VOICES, mVoiceCheckData);
}
// Note that we use this instead of the (easier to use)
// PreferenceActivity.startPreferenceFragment because the
// title will not be updated correctly in the fragment
// breadcrumb since it isn't inflated from the XML layout.
mPreferenceActivity.startPreferencePanel(
TtsEngineSettingsFragment.class.getName(),
args, 0, mEngineInfo.label, null, 0);
}
});
if (mVoiceCheckData != null) {
mSettingsIcon.setEnabled(mRadioButton.isChecked());
}
return view;
}
public void setVoiceDataDetails(Intent data) {
mVoiceCheckData = data;
// This might end up running before getView aboive, in which
// case mSettingsIcon && mRadioButton will be null. In this case
// getView will set the right values.
if (mSettingsIcon != null && mRadioButton != null) {
mSettingsIcon.setEnabled(mRadioButton.isChecked());
}
}
private void onRadioButtonClicked(CompoundButton buttonView, boolean isChecked) {
if (mPreventRadioButtonCallbacks) {
return;
}
if (isChecked) {
if (mSharedState.getCurrentChecked() != null) {
mSharedState.getCurrentChecked().setChecked(false);
}
mSharedState.setCurrentChecked(buttonView);
mSharedState.setCurrentKey(getKey());
callChangeListener(mSharedState.getCurrentKey());
}
mSettingsIcon.setEnabled(isChecked);
}
/**
* Holds all state that is common to this group of radio buttons, such
* as the currently selected key and the currently checked compound button.
* (which corresponds to this key).
*/
public interface RadioButtonGroupState {
String getCurrentKey();
Checkable getCurrentChecked();
void setCurrentKey(String key);
void setCurrentChecked(Checkable current);
}
}
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