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/*
* Copyright (C) 2008 ZXing authors
*
* 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.google.zxing.client.android;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.os.Bundle;
import android.preference.CheckBoxPreference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceScreen;
import java.util.ArrayList;
import java.util.Collection;
/**
* The main settings activity.
*
* @author dswitkin@google.com (Daniel Switkin)
*/
public final class PreferencesActivity extends PreferenceActivity
implements OnSharedPreferenceChangeListener {
public static final String KEY_DECODE_1D = "preferences_decode_1D";
public static final String KEY_DECODE_QR = "preferences_decode_QR";
public static final String KEY_DECODE_DATA_MATRIX = "preferences_decode_Data_Matrix";
public static final String KEY_CUSTOM_PRODUCT_SEARCH = "preferences_custom_product_search";
public static final String KEY_PLAY_BEEP = "preferences_play_beep";
public static final String KEY_VIBRATE = "preferences_vibrate";
public static final String KEY_COPY_TO_CLIPBOARD = "preferences_copy_to_clipboard";
public static final String KEY_FRONT_LIGHT_MODE = "preferences_front_light_mode";
public static final String KEY_BULK_MODE = "preferences_bulk_mode";
public static final String KEY_REMEMBER_DUPLICATES = "preferences_remember_duplicates";
public static final String KEY_SUPPLEMENTAL = "preferences_supplemental";
public static final String KEY_AUTO_FOCUS = "preferences_auto_focus";
public static final String KEY_INVERT_SCAN = "preferences_invert_scan";
public static final String KEY_SEARCH_COUNTRY = "preferences_search_country";
public static final String KEY_DISABLE_CONTINUOUS_FOCUS = "preferences_disable_continuous_focus";
//public static final String KEY_DISABLE_EXPOSURE = "preferences_disable_exposure";
public static final String KEY_HELP_VERSION_SHOWN = "preferences_help_version_shown";
private CheckBoxPreference decode1D;
private CheckBoxPreference decodeQR;
private CheckBoxPreference decodeDataMatrix;
@Override
protected void onCreate(Bundle icicle) {
super.onCreate(icicle);
addPreferencesFromResource(R.xml.zxing_preferences);
PreferenceScreen preferences = getPreferenceScreen();
preferences.getSharedPreferences().registerOnSharedPreferenceChangeListener(this);
decode1D = (CheckBoxPreference) preferences.findPreference(KEY_DECODE_1D);
decodeQR = (CheckBoxPreference) preferences.findPreference(KEY_DECODE_QR);
decodeDataMatrix = (CheckBoxPreference) preferences.findPreference(KEY_DECODE_DATA_MATRIX);
disableLastCheckedPref();
}
@Override
public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
disableLastCheckedPref();
}
private void disableLastCheckedPref() {
Collection<CheckBoxPreference> checked = new ArrayList<CheckBoxPreference>(3);
if (decode1D.isChecked()) {
checked.add(decode1D);
}
if (decodeQR.isChecked()) {
checked.add(decodeQR);
}
if (decodeDataMatrix.isChecked()) {
checked.add(decodeDataMatrix);
}
boolean disable = checked.size() < 2;
CheckBoxPreference[] checkBoxPreferences = {decode1D, decodeQR, decodeDataMatrix};
for (CheckBoxPreference pref : checkBoxPreferences) {
pref.setEnabled(!(disable && checked.contains(pref)));
}
}
}
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