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
17package com.android.musicfx;
18
19import android.content.Context;
20import android.util.AttributeSet;
21import android.util.Log;
22import android.view.View;
23import android.view.ViewGroup;
24
25
26/*
27 *  This ViewGroup contains a single view, which will be rotated by 90 degrees counterclockwise.
28 */
29
30public class SeekBarRotator extends ViewGroup {
31
32
33    public SeekBarRotator(Context context) {
34        super(context);
35    }
36
37    public SeekBarRotator(Context context, AttributeSet attrs) {
38        super(context, attrs);
39    }
40
41    public SeekBarRotator(Context context, AttributeSet attrs, int defStyleAttr) {
42        super(context, attrs, defStyleAttr);
43    }
44
45    public SeekBarRotator(Context context, AttributeSet attrs, int defStyleAttr,
46            int defStyleRes) {
47        super(context, attrs, defStyleAttr, defStyleRes);
48    }
49
50    @Override
51    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
52        final View child = getChildAt(0);
53
54        if (child.getVisibility() != GONE) {
55            // swap width and height for child
56            measureChild(child, heightMeasureSpec, widthMeasureSpec);
57            setMeasuredDimension(
58                    child.getMeasuredHeightAndState(),
59                    child.getMeasuredWidthAndState());
60        } else {
61            setMeasuredDimension(
62                    resolveSizeAndState(0, widthMeasureSpec, 0),
63                    resolveSizeAndState(0, heightMeasureSpec, 0));
64        }
65    }
66
67    @Override
68    protected void onLayout(boolean changed, int l, int t, int r, int b) {
69        final View child = getChildAt(0);
70
71        if (child.getVisibility() != GONE) {
72            // rotate the child 90 degrees counterclockwise around its upper-left
73            child.setPivotX(0);
74            child.setPivotY(0);
75            child.setRotation(-90);
76
77            // place the child below this view, so it rotates into view
78            int mywidth = r - l;
79            int myheight = b - t;
80            int childwidth = myheight;
81            int childheight = mywidth;
82
83            child.layout(0, myheight, childwidth, myheight + childheight);
84        }
85    }
86
87}
88