| /* |
| * Copyright (C) 2014 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; |
| |
| import android.annotation.Nullable; |
| import android.content.Context; |
| import android.graphics.drawable.Drawable; |
| import android.support.v7.preference.Preference; |
| import android.support.v7.preference.PreferenceViewHolder; |
| import android.text.TextUtils; |
| import android.util.AttributeSet; |
| import android.widget.TextView; |
| |
| import com.android.settingslib.RestrictedPreference; |
| |
| /** |
| * A preference item that can dim the icon when it's disabled, either directly or because its parent |
| * is disabled. |
| */ |
| public class DimmableIconPreference extends RestrictedPreference { |
| private static final int ICON_ALPHA_ENABLED = 255; |
| private static final int ICON_ALPHA_DISABLED = 102; |
| |
| private final CharSequence mContentDescription; |
| |
| public DimmableIconPreference(Context context) { |
| this(context, (AttributeSet) null); |
| } |
| |
| public DimmableIconPreference(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| mContentDescription = null; |
| useAdminDisabledSummary(true); |
| } |
| |
| public DimmableIconPreference(Context context, @Nullable CharSequence contentDescription) { |
| super(context); |
| mContentDescription = contentDescription; |
| useAdminDisabledSummary(true); |
| } |
| |
| private void dimIcon(boolean dimmed) { |
| Drawable icon = getIcon(); |
| if (icon != null) { |
| icon.mutate().setAlpha(dimmed ? ICON_ALPHA_DISABLED : ICON_ALPHA_ENABLED); |
| setIcon(icon); |
| } |
| } |
| |
| @Override |
| public void onBindViewHolder(PreferenceViewHolder view) { |
| super.onBindViewHolder(view); |
| if (!TextUtils.isEmpty(mContentDescription)) { |
| final TextView titleView = (TextView) view.findViewById(android.R.id.title); |
| titleView.setContentDescription(mContentDescription); |
| } |
| dimIcon(!isEnabled()); |
| } |
| } |