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      1 /*
      2  * Copyright (C) 2014 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.Context;
     20 import android.graphics.Canvas;
     21 import android.util.AttributeSet;
     22 import android.widget.SeekBar;
     23 
     24 import androidx.appcompat.R;
     25 
     26 /**
     27  * A {@link SeekBar} which supports compatible features on older versions of the platform.
     28  *
     29  * <p>This will automatically be used when you use {@link SeekBar} in your layouts
     30  * and the top-level activity / dialog is provided by
     31  * <a href="{@docRoot}topic/libraries/support-library/packages.html#v7-appcompat">appcompat</a>.
     32  * You should only need to manually use this class when writing custom views.</p>
     33  */
     34 public class AppCompatSeekBar extends SeekBar {
     35 
     36     private final AppCompatSeekBarHelper mAppCompatSeekBarHelper;
     37 
     38     public AppCompatSeekBar(Context context) {
     39         this(context, null);
     40     }
     41 
     42     public AppCompatSeekBar(Context context, AttributeSet attrs) {
     43         this(context, attrs, R.attr.seekBarStyle);
     44     }
     45 
     46     public AppCompatSeekBar(Context context, AttributeSet attrs, int defStyleAttr) {
     47         super(context, attrs, defStyleAttr);
     48 
     49         mAppCompatSeekBarHelper = new AppCompatSeekBarHelper(this);
     50         mAppCompatSeekBarHelper.loadFromAttributes(attrs, defStyleAttr);
     51     }
     52 
     53     @Override
     54     protected synchronized void onDraw(Canvas canvas) {
     55         super.onDraw(canvas);
     56         mAppCompatSeekBarHelper.drawTickMarks(canvas);
     57     }
     58 
     59     @Override
     60     protected void drawableStateChanged() {
     61         super.drawableStateChanged();
     62         mAppCompatSeekBarHelper.drawableStateChanged();
     63     }
     64 
     65     @Override
     66     public void jumpDrawablesToCurrentState() {
     67         super.jumpDrawablesToCurrentState();
     68         mAppCompatSeekBarHelper.jumpDrawablesToCurrentState();
     69     }
     70 }
     71