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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 package android.databinding.adapters;
     17 
     18 import android.databinding.BindingAdapter;
     19 import android.databinding.InverseBindingListener;
     20 import android.databinding.InverseBindingMethod;
     21 import android.databinding.InverseBindingMethods;
     22 import android.widget.SeekBar;
     23 import android.widget.SeekBar.OnSeekBarChangeListener;
     24 
     25 @InverseBindingMethods({
     26         @InverseBindingMethod(type = SeekBar.class, attribute = "android:progress"),
     27 })
     28 public class SeekBarBindingAdapter {
     29 
     30     @BindingAdapter("android:progress")
     31     public static void setProgress(SeekBar view, int progress) {
     32         if (progress != view.getProgress()) {
     33             view.setProgress(progress);
     34         }
     35     }
     36 
     37     @BindingAdapter(value = {"android:onStartTrackingTouch", "android:onStopTrackingTouch",
     38             "android:onProgressChanged", "android:progressAttrChanged"}, requireAll = false)
     39     public static void setOnSeekBarChangeListener(SeekBar view, final OnStartTrackingTouch start,
     40             final OnStopTrackingTouch stop, final OnProgressChanged progressChanged,
     41             final InverseBindingListener attrChanged) {
     42         if (start == null && stop == null && progressChanged == null && attrChanged == null) {
     43             view.setOnSeekBarChangeListener(null);
     44         } else {
     45             view.setOnSeekBarChangeListener(new OnSeekBarChangeListener() {
     46                 @Override
     47                 public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
     48                     if (progressChanged != null) {
     49                         progressChanged.onProgressChanged(seekBar, progress, fromUser);
     50                     }
     51                     if (attrChanged != null) {
     52                         attrChanged.onChange();
     53                     }
     54                 }
     55 
     56                 @Override
     57                 public void onStartTrackingTouch(SeekBar seekBar) {
     58                     if (start != null) {
     59                         start.onStartTrackingTouch(seekBar);
     60                     }
     61                 }
     62 
     63                 @Override
     64                 public void onStopTrackingTouch(SeekBar seekBar) {
     65                     if (stop != null) {
     66                         stop.onStopTrackingTouch(seekBar);
     67                     }
     68                 }
     69             });
     70         }
     71     }
     72 
     73     public interface OnStartTrackingTouch {
     74         void onStartTrackingTouch(SeekBar seekBar);
     75     }
     76 
     77     public interface OnStopTrackingTouch {
     78         void onStopTrackingTouch(SeekBar seekBar);
     79     }
     80 
     81     public interface OnProgressChanged {
     82         void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser);
     83     }
     84 }
     85