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/*
* Copyright (C) 2021 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.accessibility;
import android.content.ContentResolver;
import android.content.Context;
import android.database.ContentObserver;
import android.os.Handler;
import android.os.Looper;
import android.provider.Settings;
import androidx.annotation.FloatRange;
import androidx.annotation.VisibleForTesting;
import androidx.preference.PreferenceScreen;
import com.android.settings.core.SliderPreferenceController;
import com.android.settings.widget.SeekBarPreference;
import com.android.settingslib.core.lifecycle.LifecycleObserver;
import com.android.settingslib.core.lifecycle.events.OnPause;
import com.android.settingslib.core.lifecycle.events.OnResume;
/** Preference controller that controls the transparency seekbar in accessibility button page. */
public class FloatingMenuTransparencyPreferenceController extends SliderPreferenceController
implements LifecycleObserver, OnResume, OnPause {
@VisibleForTesting
@FloatRange(from = 0.0, to = 1.0)
static final float DEFAULT_TRANSPARENCY = 0.45f;
@VisibleForTesting
static final float MAXIMUM_TRANSPARENCY = 1.0f;
private static final int FADE_ENABLED = 1;
private static final float MIN_PROGRESS = 0f;
private static final float MAX_PROGRESS = 90f;
@VisibleForTesting
static final float PRECISION = 100f;
private final ContentResolver mContentResolver;
@VisibleForTesting
final ContentObserver mContentObserver;
@VisibleForTesting
SeekBarPreference mPreference;
public FloatingMenuTransparencyPreferenceController(Context context,
String preferenceKey) {
super(context, preferenceKey);
mContentResolver = context.getContentResolver();
mContentObserver = new ContentObserver(new Handler(Looper.getMainLooper())) {
@Override
public void onChange(boolean selfChange) {
updateAvailabilityStatus();
}
};
}
@Override
public int getAvailabilityStatus() {
return AccessibilityUtil.isFloatingMenuEnabled(mContext)
? AVAILABLE : DISABLED_DEPENDENT_SETTING;
}
@Override
public void displayPreference(PreferenceScreen screen) {
super.displayPreference(screen);
mPreference = screen.findPreference(getPreferenceKey());
mPreference.setContinuousUpdates(true);
mPreference.setMax(getMax());
mPreference.setMin(getMin());
mPreference.setHapticFeedbackMode(SeekBarPreference.HAPTIC_FEEDBACK_MODE_ON_ENDS);
updateState(mPreference);
}
@Override
public void onResume() {
mContentResolver.registerContentObserver(
Settings.Secure.getUriFor(
Settings.Secure.ACCESSIBILITY_BUTTON_MODE), /* notifyForDescendants= */
false, mContentObserver);
mContentResolver.registerContentObserver(
Settings.Secure.getUriFor(
Settings.Secure.ACCESSIBILITY_FLOATING_MENU_FADE_ENABLED),
/* notifyForDescendants= */ false, mContentObserver);
}
@Override
public void onPause() {
mContentResolver.unregisterContentObserver(mContentObserver);
}
@Override
public int getSliderPosition() {
return convertTransparencyFloatToInt(getTransparency());
}
@Override
public boolean setSliderPosition(int position) {
final float opacityValue = MAXIMUM_TRANSPARENCY - convertTransparencyIntToFloat(position);
return Settings.Secure.putFloat(mContentResolver,
Settings.Secure.ACCESSIBILITY_FLOATING_MENU_OPACITY, opacityValue);
}
@Override
public int getMax() {
return (int) MAX_PROGRESS;
}
@Override
public int getMin() {
return (int) MIN_PROGRESS;
}
private void updateAvailabilityStatus() {
final boolean fadeEnabled = Settings.Secure.getInt(mContentResolver,
Settings.Secure.ACCESSIBILITY_FLOATING_MENU_FADE_ENABLED, FADE_ENABLED)
== FADE_ENABLED;
mPreference.setEnabled(AccessibilityUtil.isFloatingMenuEnabled(mContext) && fadeEnabled);
}
private int convertTransparencyFloatToInt(float value) {
return Math.round(value * PRECISION);
}
private float convertTransparencyIntToFloat(int value) {
return (float) value / PRECISION;
}
private float getTransparency() {
float transparencyValue = MAXIMUM_TRANSPARENCY - (Settings.Secure.getFloat(mContentResolver,
Settings.Secure.ACCESSIBILITY_FLOATING_MENU_OPACITY, DEFAULT_TRANSPARENCY));
final float minValue = MIN_PROGRESS / PRECISION;
final float maxValue = MAX_PROGRESS / PRECISION;
return (transparencyValue < minValue || transparencyValue > maxValue)
? DEFAULT_TRANSPARENCY : transparencyValue;
}
}
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