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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.settingslib.graph;
     18 
     19 import android.annotation.NonNull;
     20 import android.content.Context;
     21 import android.content.res.Resources;
     22 import android.graphics.Bitmap;
     23 import android.graphics.Canvas;
     24 import android.graphics.Matrix;
     25 import android.graphics.PorterDuff;
     26 import android.graphics.PorterDuffColorFilter;
     27 import android.graphics.Rect;
     28 import android.graphics.drawable.BitmapDrawable;
     29 import android.graphics.drawable.Drawable;
     30 import android.graphics.drawable.LayerDrawable;
     31 import android.support.annotation.VisibleForTesting;
     32 import android.view.Gravity;
     33 import android.view.View;
     34 
     35 import com.android.settingslib.R;
     36 import com.android.settingslib.Utils;
     37 
     38 /**
     39  * LayerDrawable contains the bluetooth device icon and battery gauge icon
     40  */
     41 public class BluetoothDeviceLayerDrawable extends LayerDrawable {
     42 
     43     private BluetoothDeviceLayerDrawableState mState;
     44 
     45     private BluetoothDeviceLayerDrawable(@NonNull Drawable[] layers) {
     46         super(layers);
     47     }
     48 
     49     /**
     50      * Create the {@link LayerDrawable} that contains bluetooth device icon and battery icon.
     51      * This is a horizontal layout drawable while bluetooth icon at start and battery icon at end.
     52      *
     53      * @param context      used to get the spec for icon
     54      * @param resId        represents the bluetooth device drawable
     55      * @param batteryLevel the battery level for bluetooth device
     56      */
     57     public static BluetoothDeviceLayerDrawable createLayerDrawable(Context context, int resId,
     58             int batteryLevel) {
     59         return createLayerDrawable(context, resId, batteryLevel, 1 /*iconScale*/);
     60     }
     61 
     62     /**
     63      * Create the {@link LayerDrawable} that contains bluetooth device icon and battery icon.
     64      * This is a horizontal layout drawable while bluetooth icon at start and battery icon at end.
     65      *
     66      * @param context      used to get the spec for icon
     67      * @param resId        represents the bluetooth device drawable
     68      * @param batteryLevel the battery level for bluetooth device
     69      * @param iconScale    the ratio of height between battery icon and bluetooth icon
     70      */
     71     public static BluetoothDeviceLayerDrawable createLayerDrawable(Context context, int resId,
     72             int batteryLevel, float iconScale) {
     73         final Drawable deviceDrawable = context.getDrawable(resId);
     74 
     75         final BatteryMeterDrawable batteryDrawable = new BatteryMeterDrawable(context,
     76                 context.getColor(R.color.meter_background_color), batteryLevel);
     77         final int pad = context.getResources().getDimensionPixelSize(R.dimen.bt_battery_padding);
     78         batteryDrawable.setPadding(pad, pad, pad, pad);
     79 
     80         final BluetoothDeviceLayerDrawable drawable = new BluetoothDeviceLayerDrawable(
     81                 new Drawable[]{deviceDrawable, batteryDrawable});
     82         // Set the bluetooth icon at the left
     83         drawable.setLayerGravity(0 /* index of deviceDrawable */, Gravity.START);
     84         // Set battery icon to the right of the bluetooth icon
     85         drawable.setLayerInsetStart(1 /* index of batteryDrawable */,
     86                 deviceDrawable.getIntrinsicWidth());
     87         drawable.setLayerInsetTop(1 /* index of batteryDrawable */,
     88                 (int) (deviceDrawable.getIntrinsicHeight() * (1 - iconScale)));
     89 
     90         drawable.setConstantState(context, resId, batteryLevel, iconScale);
     91 
     92         return drawable;
     93     }
     94 
     95     public void setConstantState(Context context, int resId, int batteryLevel, float iconScale) {
     96         mState = new BluetoothDeviceLayerDrawableState(context, resId, batteryLevel, iconScale);
     97     }
     98 
     99     @Override
    100     public ConstantState getConstantState() {
    101         return mState;
    102     }
    103 
    104     /**
    105      * Battery gauge icon with new spec.
    106      */
    107     @VisibleForTesting
    108     static class BatteryMeterDrawable extends BatteryMeterDrawableBase {
    109         private final float mAspectRatio;
    110         @VisibleForTesting
    111         int mFrameColor;
    112 
    113         public BatteryMeterDrawable(Context context, int frameColor, int batteryLevel) {
    114             super(context, frameColor);
    115             final Resources resources = context.getResources();
    116             mButtonHeightFraction = resources.getFraction(
    117                     R.fraction.bt_battery_button_height_fraction, 1, 1);
    118             mAspectRatio = resources.getFraction(R.fraction.bt_battery_ratio_fraction, 1, 1);
    119 
    120             final int tintColor = Utils.getColorAttr(context, android.R.attr.colorControlNormal);
    121             setColorFilter(new PorterDuffColorFilter(tintColor, PorterDuff.Mode.SRC_IN));
    122             setBatteryLevel(batteryLevel);
    123             mFrameColor = frameColor;
    124         }
    125 
    126         @Override
    127         protected float getAspectRatio() {
    128             return mAspectRatio;
    129         }
    130 
    131         @Override
    132         protected float getRadiusRatio() {
    133             // Remove the round edge
    134             return 0;
    135         }
    136     }
    137 
    138     /**
    139      * {@link ConstantState} to restore the {@link BluetoothDeviceLayerDrawable}
    140      */
    141     private static class BluetoothDeviceLayerDrawableState extends ConstantState {
    142         Context context;
    143         int resId;
    144         int batteryLevel;
    145         float iconScale;
    146 
    147         public BluetoothDeviceLayerDrawableState(Context context, int resId,
    148                 int batteryLevel, float iconScale) {
    149             this.context = context;
    150             this.resId = resId;
    151             this.batteryLevel = batteryLevel;
    152             this.iconScale = iconScale;
    153         }
    154 
    155         @Override
    156         public Drawable newDrawable() {
    157             return createLayerDrawable(context, resId, batteryLevel, iconScale);
    158         }
    159 
    160         @Override
    161         public int getChangingConfigurations() {
    162             return 0;
    163         }
    164     }
    165 }
    166