1/*
2 * Copyright (C) 2017 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
18package com.android.tv.settings.connectivity.setup;
19
20import android.content.Context;
21import android.content.res.TypedArray;
22import android.util.AttributeSet;
23import android.widget.RelativeLayout;
24import android.widget.TextView;
25
26import com.android.tv.settings.R;
27
28/**
29 * Relative layout implementation that lays out child views based on provided keyline percent(
30 * distance of TitleView baseline from the top). We do the similar thing in
31 * {@link com.google.android.tungsten.setupwraith.ui.GuidanceRelativeLayout}
32 */
33public class GuidanceRelativeLayout extends RelativeLayout {
34    private float mTitleKeylinePercent;
35
36    public GuidanceRelativeLayout(Context context) {
37        this(context, null);
38    }
39
40    public GuidanceRelativeLayout(Context context, AttributeSet attrs) {
41        this(context, attrs, 0);
42    }
43
44    public GuidanceRelativeLayout(Context context, AttributeSet attrs, int defStyle) {
45        super(context, attrs, defStyle);
46        mTitleKeylinePercent = getKeyLinePercent(context);
47    }
48
49    private static float getKeyLinePercent(Context context) {
50        TypedArray ta = context.getTheme().obtainStyledAttributes(
51                R.styleable.LeanbackGuidedStepTheme);
52        float percent = ta.getFloat(R.styleable.LeanbackGuidedStepTheme_guidedStepKeyline, 40);
53        ta.recycle();
54        return percent;
55    }
56
57    @Override
58    protected void onLayout(boolean changed, int l, int t, int r, int b) {
59        super.onLayout(changed, l, t, r, b);
60
61        TextView titleView = (TextView) getRootView().findViewById(R.id.guidance_title);
62        TextView descriptionView = (TextView) getRootView().findViewById(R.id.guidance_description);
63
64        int mTitleKeylinePixels = (int) (getMeasuredHeight() * mTitleKeylinePercent / 100);
65        if (titleView != null && titleView.getParent() == this) {
66            LayoutParams lp = (LayoutParams) titleView.getLayoutParams();
67
68            // To make the mid position of a text line match the key line, we need to delete the
69            // existing textview top margin, the icon height and the baseline offset for the text
70            // line.
71            int guidanceTextContainerTop = mTitleKeylinePixels - lp.topMargin;
72
73            // If there are more than 1 line, always make "second line baseline" match
74            // the key line. Otherwise, use the "first line baseline".
75            if (titleView.getLineCount() > 1) {
76                guidanceTextContainerTop -= titleView.getLayout().getLineBaseline(1);
77            } else {
78                guidanceTextContainerTop -= titleView.getLayout().getLineBaseline(0);
79            }
80
81            int offset = guidanceTextContainerTop;
82            titleView.offsetTopAndBottom(offset);
83
84            if (descriptionView != null && descriptionView.getParent() == this) {
85                descriptionView.offsetTopAndBottom(offset);
86            }
87        }
88    }
89}
90