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
17package com.android.gallery3d.photoeditor.actions;
18
19import android.content.Context;
20import android.util.AttributeSet;
21import 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 */
26class ScaleSeekBar extends AbstractSeekBar {
27
28    /**
29     * Listens to scale changes.
30     */
31    public interface OnScaleChangeListener {
32
33        void onProgressChanged(float progress, boolean fromUser);
34    }
35
36    public ScaleSeekBar(Context context, AttributeSet attrs) {
37        super(context, attrs);
38
39        setMax(100);
40    }
41
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
60    public void setProgress(float progress) {
61        setProgress((int) (progress * getMax()));
62    }
63}
64