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 17 package com.android.launcher3.keyboard; 18 19 import android.graphics.Rect; 20 import android.view.View; 21 22 import com.android.launcher3.PagedView; 23 24 /** 25 * {@link FocusIndicatorHelper} for a generic view group. 26 */ 27 public class ViewGroupFocusHelper extends FocusIndicatorHelper { 28 29 private final View mContainer; 30 ViewGroupFocusHelper(View container)31 public ViewGroupFocusHelper(View container) { 32 super(container); 33 mContainer = container; 34 } 35 36 @Override viewToRect(View v, Rect outRect)37 public void viewToRect(View v, Rect outRect) { 38 outRect.left = 0; 39 outRect.top = 0; 40 41 computeLocationRelativeToContainer(v, outRect); 42 43 // If a view is scaled, its position will also shift accordingly. For optimization, only 44 // consider this for the last node. 45 outRect.left += (1 - v.getScaleX()) * v.getWidth() / 2; 46 outRect.top += (1 - v.getScaleY()) * v.getHeight() / 2; 47 48 outRect.right = outRect.left + (int) (v.getScaleX() * v.getWidth()); 49 outRect.bottom = outRect.top + (int) (v.getScaleY() * v.getHeight()); 50 } 51 computeLocationRelativeToContainer(View child, Rect outRect)52 private void computeLocationRelativeToContainer(View child, Rect outRect) { 53 View parent = (View) child.getParent(); 54 outRect.left += child.getX(); 55 outRect.top += child.getY(); 56 57 if (parent != mContainer) { 58 if (parent instanceof PagedView) { 59 PagedView page = (PagedView) parent; 60 outRect.left -= page.getScrollForPage(page.indexOfChild(child)); 61 } 62 63 computeLocationRelativeToContainer(parent, outRect); 64 } 65 } 66 } 67