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/* -*- Mode: java; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* xscreensaver, Copyright (c) 2016 Jamie Zawinski <jwz@jwz.org>
* and Dennis Sheil <dennis@panaceasupplies.com>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation. No representations are made about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* The superclass of every saver's preferences panel.
*
* The only reason the subclasses of this class exist is so that we know
* which "_settings.xml" to read -- we extract the base name from self's
* class.
*
* project/xscreensaver/res/xml/SAVER_dream.xml refers to it as
* android:settingsActivity="SAVER_Settings". If there was some way
* to pass an argument from the XML into here, or to otherwise detect
* which Dream was instantiating this Settings, we wouldn't need those
* hundreds of Settings subclasses.
*/
package org.jwz.xscreensaver;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.content.SharedPreferences;
import android.preference.PreferenceActivity;
import android.preference.Preference;
import android.preference.ListPreference;
import android.preference.EditTextPreference;
import android.preference.CheckBoxPreference;
import org.jwz.xscreensaver.SliderPreference;
import org.jwz.xscreensaver.R;
import java.util.Map;
import java.lang.reflect.Field;
public abstract class Settings extends PreferenceActivity
implements SharedPreferences.OnSharedPreferenceChangeListener {
@Override
protected void onCreate (Bundle icicle) {
super.onCreate (icicle);
// Extract the saver name from e.g. "BouncingCowSettings"
String name = this.getClass().getSimpleName();
String tail = "Settings";
if (name.endsWith(tail))
name = name.substring (0, name.length() - tail.length());
name = name.toLowerCase();
// #### All of these have been deprecated:
// getPreferenceManager()
// addPreferencesFromResource(int)
// findPreference(CharSequence)
getPreferenceManager().setSharedPreferencesName (name);
// read R.xml.SAVER_settings dynamically
int res = -1;
String pref_class = name + "_settings";
try { res = R.xml.class.getDeclaredField(pref_class).getInt (null); }
catch (Exception e) { }
if (res != -1)
addPreferencesFromResource (res);
final int res_final = res;
SharedPreferences prefs = getPreferenceManager().getSharedPreferences();
prefs.registerOnSharedPreferenceChangeListener (this);
updateAllPrefsSummaries (prefs);
// Find the "Reset to defaults" button and install a click handler on it.
//
Preference reset = findPreference (name + "_reset");
reset.setOnPreferenceClickListener(
new Preference.OnPreferenceClickListener() {
@Override
public boolean onPreferenceClick(Preference preference) {
SharedPreferences prefs =
getPreferenceManager().getSharedPreferences();
// Wipe everything from the preferences hash, then reload defaults.
prefs.edit().clear().commit();
getPreferenceScreen().removeAll();
addPreferencesFromResource (res_final);
// I guess we need to re-get this after the removeAll?
prefs = getPreferenceManager().getSharedPreferences();
// But now we need to iterate over every Preference widget and
// push the new value down into it. If you think this all looks
// ridiculously non-object-oriented and completely insane, that's
// because it is.
Map <String, ?> keys = prefs.getAll();
for (Map.Entry <String, ?> entry : keys.entrySet()) {
String key = entry.getKey();
String val = String.valueOf (entry.getValue());
Preference pref = findPreference (key);
if (pref instanceof ListPreference) {
((ListPreference) pref).setValue (prefs.getString (key, ""));
} else if (pref instanceof SliderPreference) {
((SliderPreference) pref).setValue (prefs.getFloat (key, 0));
} else if (pref instanceof EditTextPreference) {
((EditTextPreference) pref).setText (prefs.getString (key, ""));
} else if (pref instanceof CheckBoxPreference) {
((CheckBoxPreference) pref).setChecked (
prefs.getBoolean (key,false));
}
updatePrefsSummary (prefs, pref);
}
return true;
}
});
}
@Override
protected void onResume() {
super.onResume();
SharedPreferences prefs = getPreferenceManager().getSharedPreferences();
prefs.registerOnSharedPreferenceChangeListener (this);
updateAllPrefsSummaries(prefs);
}
@Override
protected void onPause() {
getPreferenceManager().getSharedPreferences().
unregisterOnSharedPreferenceChangeListener(this);
super.onPause();
}
@Override
protected void onDestroy() {
getPreferenceManager().getSharedPreferences().
unregisterOnSharedPreferenceChangeListener(this);
super.onDestroy();
}
public void onSharedPreferenceChanged (SharedPreferences sharedPreferences,
String key) {
updatePrefsSummary(sharedPreferences, findPreference(key));
}
protected void updatePrefsSummary(SharedPreferences sharedPreferences,
Preference pref) {
if (pref == null)
return;
if (pref instanceof ListPreference) {
pref.setTitle (((ListPreference) pref).getEntry());
} else if (pref instanceof SliderPreference) {
float v = ((SliderPreference) pref).getValue();
int i = (int) Math.floor (v);
if (v == i)
pref.setSummary (String.valueOf (i));
else
pref.setSummary (String.valueOf (v));
} else if (pref instanceof EditTextPreference) {
pref.setSummary (((EditTextPreference) pref).getText());
}
}
protected void updateAllPrefsSummaries(SharedPreferences prefs) {
Map <String, ?> keys = prefs.getAll();
for (Map.Entry <String, ?> entry : keys.entrySet()) {
updatePrefsSummary (prefs, findPreference (entry.getKey()));
}
}
}
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