1/*
2 * Copyright (C) 2016 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.deskclock;
18
19import android.content.Context;
20import android.util.AttributeSet;
21import android.widget.FrameLayout;
22
23/**
24 * A container that frames a timer circle of some sort. The circle is allowed to grow naturally
25 * according to its layout constraints up to the {@link R.dimen#max_timer_circle_size largest}
26 * allowable size.
27 */
28public class TimerCircleFrameLayout extends FrameLayout {
29
30    public TimerCircleFrameLayout(Context context) {
31        super(context);
32    }
33
34    public TimerCircleFrameLayout(Context context, AttributeSet attrs) {
35        super(context, attrs);
36    }
37
38    public TimerCircleFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {
39        super(context, attrs, defStyleAttr);
40    }
41
42    /**
43     * Note: this method assumes the parent container will specify {@link MeasureSpec#EXACTLY exact}
44     * width and height values.
45     *
46     * @param widthMeasureSpec horizontal space requirements as imposed by the parent
47     * @param heightMeasureSpec vertical space requirements as imposed by the parent
48     */
49    @Override
50    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
51        final int paddingLeft = getPaddingLeft();
52        final int paddingRight = getPaddingRight();
53
54        final int paddingTop = getPaddingTop();
55        final int paddingBottom = getPaddingBottom();
56
57        // Fetch the exact sizes imposed by the parent container.
58        final int width = MeasureSpec.getSize(widthMeasureSpec) - paddingLeft - paddingRight;
59        final int height = MeasureSpec.getSize(heightMeasureSpec) - paddingTop - paddingBottom;
60        final int smallestDimension = Math.min(width, height);
61
62        // Fetch the absolute maximum circle size allowed.
63        final int maxSize = getResources().getDimensionPixelSize(R.dimen.max_timer_circle_size);
64        final int size = Math.min(smallestDimension, maxSize);
65
66        // Set the size of this container.
67        widthMeasureSpec = MeasureSpec.makeMeasureSpec(size + paddingLeft + paddingRight,
68                MeasureSpec.EXACTLY);
69        heightMeasureSpec = MeasureSpec.makeMeasureSpec(size + paddingTop + paddingBottom,
70                MeasureSpec.EXACTLY);
71
72        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
73    }
74}
75