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      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 androidx.appcompat.widget;
     18 
     19 import android.content.res.ColorStateList;
     20 import android.content.res.TypedArray;
     21 import android.graphics.PorterDuff;
     22 import android.graphics.drawable.Drawable;
     23 import android.os.Build;
     24 import android.util.AttributeSet;
     25 import android.widget.CompoundButton;
     26 
     27 import androidx.annotation.Nullable;
     28 import androidx.appcompat.R;
     29 import androidx.appcompat.content.res.AppCompatResources;
     30 import androidx.core.graphics.drawable.DrawableCompat;
     31 import androidx.core.widget.CompoundButtonCompat;
     32 
     33 class AppCompatCompoundButtonHelper {
     34 
     35     private final CompoundButton mView;
     36 
     37     private ColorStateList mButtonTintList = null;
     38     private PorterDuff.Mode mButtonTintMode = null;
     39     private boolean mHasButtonTint = false;
     40     private boolean mHasButtonTintMode = false;
     41 
     42     private boolean mSkipNextApply;
     43 
     44     /**
     45      * Interface which allows us to directly set a button, bypass any calls back to ourselves.
     46      */
     47     interface DirectSetButtonDrawableInterface {
     48         void setButtonDrawable(Drawable buttonDrawable);
     49     }
     50 
     51     AppCompatCompoundButtonHelper(CompoundButton view) {
     52         mView = view;
     53     }
     54 
     55     void loadFromAttributes(AttributeSet attrs, int defStyleAttr) {
     56         TypedArray a = mView.getContext().obtainStyledAttributes(attrs, R.styleable.CompoundButton,
     57                 defStyleAttr, 0);
     58         try {
     59             if (a.hasValue(R.styleable.CompoundButton_android_button)) {
     60                 final int resourceId = a.getResourceId(
     61                         R.styleable.CompoundButton_android_button, 0);
     62                 if (resourceId != 0) {
     63                     mView.setButtonDrawable(
     64                             AppCompatResources.getDrawable(mView.getContext(), resourceId));
     65                 }
     66             }
     67             if (a.hasValue(R.styleable.CompoundButton_buttonTint)) {
     68                 CompoundButtonCompat.setButtonTintList(mView,
     69                         a.getColorStateList(R.styleable.CompoundButton_buttonTint));
     70             }
     71             if (a.hasValue(R.styleable.CompoundButton_buttonTintMode)) {
     72                 CompoundButtonCompat.setButtonTintMode(mView,
     73                         DrawableUtils.parseTintMode(
     74                                 a.getInt(R.styleable.CompoundButton_buttonTintMode, -1),
     75                                 null));
     76             }
     77         } finally {
     78             a.recycle();
     79         }
     80     }
     81 
     82     void setSupportButtonTintList(ColorStateList tint) {
     83         mButtonTintList = tint;
     84         mHasButtonTint = true;
     85 
     86         applyButtonTint();
     87     }
     88 
     89     ColorStateList getSupportButtonTintList() {
     90         return mButtonTintList;
     91     }
     92 
     93     void setSupportButtonTintMode(@Nullable PorterDuff.Mode tintMode) {
     94         mButtonTintMode = tintMode;
     95         mHasButtonTintMode = true;
     96 
     97         applyButtonTint();
     98     }
     99 
    100     PorterDuff.Mode getSupportButtonTintMode() {
    101         return mButtonTintMode;
    102     }
    103 
    104     void onSetButtonDrawable() {
    105         if (mSkipNextApply) {
    106             mSkipNextApply = false;
    107             return;
    108         }
    109 
    110         mSkipNextApply = true;
    111         applyButtonTint();
    112     }
    113 
    114     void applyButtonTint() {
    115         Drawable buttonDrawable = CompoundButtonCompat.getButtonDrawable(mView);
    116 
    117         if (buttonDrawable != null && (mHasButtonTint || mHasButtonTintMode)) {
    118             buttonDrawable = DrawableCompat.wrap(buttonDrawable);
    119             buttonDrawable = buttonDrawable.mutate();
    120             if (mHasButtonTint) {
    121                 DrawableCompat.setTintList(buttonDrawable, mButtonTintList);
    122             }
    123             if (mHasButtonTintMode) {
    124                 DrawableCompat.setTintMode(buttonDrawable, mButtonTintMode);
    125             }
    126             // The drawable (or one of its children) may not have been
    127             // stateful before applying the tint, so let's try again.
    128             if (buttonDrawable.isStateful()) {
    129                 buttonDrawable.setState(mView.getDrawableState());
    130             }
    131             mView.setButtonDrawable(buttonDrawable);
    132         }
    133     }
    134 
    135     int getCompoundPaddingLeft(int superValue) {
    136         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) {
    137             // Before JB-MR1 the button drawable wasn't taken into account for padding. We'll
    138             // workaround that here
    139             Drawable buttonDrawable = CompoundButtonCompat.getButtonDrawable(mView);
    140             if (buttonDrawable != null) {
    141                 superValue += buttonDrawable.getIntrinsicWidth();
    142             }
    143         }
    144         return superValue;
    145     }
    146 }
    147