Home | History | Annotate | Download | only in util 
      1 /*
      2  * Copyright (C) 2015 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.messaging.util;
     18 
     19 import android.content.res.ColorStateList;
     20 import android.graphics.Color;
     21 import android.graphics.PorterDuff;
     22 import android.graphics.drawable.Drawable;
     23 import android.support.v7.graphics.drawable.DrawableWrapper;
     24 
     25 /*
     26  * This is directly copied from v7/appcompat/src/android/support/v7/internal/widget/TintManager.java
     27  */
     28 
     29 /**
     30  * A {@link DrawableWrapper} which updates it's color filter using a {@link ColorStateList}.
     31  */
     32 class TintDrawableWrapper extends DrawableWrapper {
     33     private final ColorStateList mTintStateList;
     34     private final PorterDuff.Mode mTintMode;
     35     private int mCurrentColor;
     36     public TintDrawableWrapper(Drawable drawable, ColorStateList tintStateList) {
     37         this(drawable, tintStateList, PorterDuff.Mode.SRC_IN);
     38     }
     39     public TintDrawableWrapper(Drawable drawable, ColorStateList tintStateList,
     40             PorterDuff.Mode tintMode) {
     41         super(drawable);
     42         mTintStateList = tintStateList;
     43         mTintMode = tintMode;
     44     }
     45     @Override
     46     public boolean isStateful() {
     47         return (mTintStateList != null && mTintStateList.isStateful()) || super.isStateful();
     48     }
     49     @Override
     50     public boolean setState(int[] stateSet) {
     51         boolean handled = super.setState(stateSet);
     52         handled = updateTint(stateSet) || handled;
     53         return handled;
     54     }
     55     private boolean updateTint(int[] state) {
     56         if (mTintStateList != null) {
     57             final int color = mTintStateList.getColorForState(state, mCurrentColor);
     58             if (color != mCurrentColor) {
     59                 if (color != Color.TRANSPARENT) {
     60                     setColorFilter(color, mTintMode);
     61                 } else {
     62                     clearColorFilter();
     63                 }
     64                 mCurrentColor = color;
     65                 return true;
     66             }
     67         }
     68         return false;
     69     }
     70 }
     71