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/*
* Copyright (C) 2012 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.inputmethod;
import com.android.settings.R;
import com.android.settings.SettingsPreferenceFragment;
import android.content.Context;
import android.hardware.input.InputDeviceIdentifier;
import android.hardware.input.InputManager;
import android.hardware.input.InputManager.InputDeviceListener;
import android.hardware.input.KeyboardLayout;
import android.os.Bundle;
import android.preference.CheckBoxPreference;
import android.preference.Preference;
import android.preference.PreferenceScreen;
import android.view.InputDevice;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
public class KeyboardLayoutPickerFragment extends SettingsPreferenceFragment
implements InputDeviceListener {
private InputDeviceIdentifier mInputDeviceIdentifier;
private int mInputDeviceId = -1;
private InputManager mIm;
private KeyboardLayout[] mKeyboardLayouts;
private HashMap<CheckBoxPreference, KeyboardLayout> mPreferenceMap =
new HashMap<CheckBoxPreference, KeyboardLayout>();
/**
* Intent extra: The input device descriptor of the keyboard whose keyboard
* layout is to be changed.
*/
public static final String EXTRA_INPUT_DEVICE_IDENTIFIER = "input_device_identifier";
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
mInputDeviceIdentifier = getActivity().getIntent().getParcelableExtra(
EXTRA_INPUT_DEVICE_IDENTIFIER);
if (mInputDeviceIdentifier == null) {
getActivity().finish();
}
mIm = (InputManager)getSystemService(Context.INPUT_SERVICE);
mKeyboardLayouts = mIm.getKeyboardLayouts();
Arrays.sort(mKeyboardLayouts);
setPreferenceScreen(createPreferenceHierarchy());
}
@Override
public void onResume() {
super.onResume();
mIm.registerInputDeviceListener(this, null);
InputDevice inputDevice =
mIm.getInputDeviceByDescriptor(mInputDeviceIdentifier.getDescriptor());
if (inputDevice == null) {
getActivity().finish();
return;
}
mInputDeviceId = inputDevice.getId();
updateCheckedState();
}
@Override
public void onPause() {
mIm.unregisterInputDeviceListener(this);
mInputDeviceId = -1;
super.onPause();
}
@Override
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen,
Preference preference) {
if (preference instanceof CheckBoxPreference) {
CheckBoxPreference checkboxPref = (CheckBoxPreference)preference;
KeyboardLayout layout = mPreferenceMap.get(checkboxPref);
if (layout != null) {
boolean checked = checkboxPref.isChecked();
if (checked) {
mIm.addKeyboardLayoutForInputDevice(mInputDeviceIdentifier,
layout.getDescriptor());
} else {
mIm.removeKeyboardLayoutForInputDevice(mInputDeviceIdentifier,
layout.getDescriptor());
}
return true;
}
}
return super.onPreferenceTreeClick(preferenceScreen, preference);
}
@Override
public void onInputDeviceAdded(int deviceId) {
}
@Override
public void onInputDeviceChanged(int deviceId) {
if (mInputDeviceId >= 0 && deviceId == mInputDeviceId) {
updateCheckedState();
}
}
@Override
public void onInputDeviceRemoved(int deviceId) {
if (mInputDeviceId >= 0 && deviceId == mInputDeviceId) {
getActivity().finish();
}
}
private PreferenceScreen createPreferenceHierarchy() {
PreferenceScreen root = getPreferenceManager().createPreferenceScreen(getActivity());
Context context = getActivity();
for (KeyboardLayout layout : mKeyboardLayouts) {
CheckBoxPreference pref = new CheckBoxPreference(context);
pref.setTitle(layout.getLabel());
pref.setSummary(layout.getCollection());
root.addPreference(pref);
mPreferenceMap.put(pref, layout);
}
return root;
}
private void updateCheckedState() {
String[] enabledKeyboardLayouts = mIm.getKeyboardLayoutsForInputDevice(
mInputDeviceIdentifier);
Arrays.sort(enabledKeyboardLayouts);
for (Map.Entry<CheckBoxPreference, KeyboardLayout> entry : mPreferenceMap.entrySet()) {
entry.getKey().setChecked(Arrays.binarySearch(enabledKeyboardLayouts,
entry.getValue().getDescriptor()) >= 0);
}
}
}
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