1 /* 2 * Copyright (C) 2010 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.gallery3d.photoeditor.actions; 18 19 import android.content.Context; 20 import android.util.AttributeSet; 21 import android.widget.SeekBar; 22 23 /** 24 * Seek-bar that has a draggable thumb to set and get the normalized scale value from 0 to 1. 25 */ 26 class ScaleSeekBar extends AbstractSeekBar { 27 28 /** 29 * Listens to scale changes. 30 */ 31 public interface OnScaleChangeListener { 32 onProgressChanged(float progress, boolean fromUser)33 void onProgressChanged(float progress, boolean fromUser); 34 } 35 ScaleSeekBar(Context context, AttributeSet attrs)36 public ScaleSeekBar(Context context, AttributeSet attrs) { 37 super(context, attrs); 38 39 setMax(100); 40 } 41 setOnScaleChangeListener(final OnScaleChangeListener listener)42 public void setOnScaleChangeListener(final OnScaleChangeListener listener) { 43 setOnSeekBarChangeListener((listener == null) ? null : new OnSeekBarChangeListener() { 44 45 @Override 46 public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { 47 listener.onProgressChanged((float) progress / getMax(), fromUser); 48 } 49 50 @Override 51 public void onStartTrackingTouch(SeekBar seekBar) { 52 } 53 54 @Override 55 public void onStopTrackingTouch(SeekBar seekBar) { 56 } 57 }); 58 } 59 setProgress(float progress)60 public void setProgress(float progress) { 61 setProgress((int) (progress * getMax())); 62 } 63 } 64