packages/SystemUI/src/com/android/systemui/volume/VolumeUI.java

/*
 * 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.systemui.volume;

import android.content.res.Configuration;
import android.os.Handler;
import android.util.Log;

import com.android.systemui.R;
import com.android.systemui.SystemUI;
import com.android.systemui.SystemUIFactory;
import com.android.systemui.qs.tiles.DndTile;

import java.io.FileDescriptor;
import java.io.PrintWriter;

public class VolumeUI extends SystemUI {
    private static final String TAG = "VolumeUI";
    private static boolean LOGD = Log.isLoggable(TAG, Log.DEBUG);

    private final Handler mHandler = new Handler();

    private boolean mEnabled;
    private VolumeDialogComponent mVolumeComponent;

    @Override
    public void start() {
        boolean enableVolumeUi = mContext.getResources().getBoolean(R.bool.enable_volume_ui);
        boolean enableSafetyWarning =
            mContext.getResources().getBoolean(R.bool.enable_safety_warning);
        mEnabled = enableVolumeUi || enableSafetyWarning;
        if (!mEnabled) return;

        mVolumeComponent = SystemUIFactory.getInstance()
                .createVolumeDialogComponent(this, mContext);
        mVolumeComponent.setEnableDialogs(enableVolumeUi, enableSafetyWarning);
        putComponent(VolumeComponent.class, getVolumeComponent());
        setDefaultVolumeController();
    }

    private VolumeComponent getVolumeComponent() {
        return mVolumeComponent;
    }

    @Override
    protected void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        if (!mEnabled) return;
        getVolumeComponent().onConfigurationChanged(newConfig);
    }

    @Override
    public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
        pw.print("mEnabled="); pw.println(mEnabled);
        if (!mEnabled) return;
        getVolumeComponent().dump(fd, pw, args);
    }

    private void setDefaultVolumeController() {
        DndTile.setVisible(mContext, true);
        if (LOGD) Log.d(TAG, "Registering default volume controller");
        getVolumeComponent().register();
    }
}