1a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes/* 2a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Copyright (C) 2015 The Android Open Source Project 3a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 4a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Licensed under the Apache License, Version 2.0 (the "License"); 5a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * you may not use this file except in compliance with the License. 6a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * You may obtain a copy of the License at 7a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 8a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * http://www.apache.org/licenses/LICENSE-2.0 9a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 10a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Unless required by applicable law or agreed to in writing, software 11a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * distributed under the License is distributed on an "AS IS" BASIS, 12a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * See the License for the specific language governing permissions and 14a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * limitations under the License. 15a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 16a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 17a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banespackage android.support.design.widget; 18a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 19eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikasimport android.graphics.Matrix; 20a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.graphics.Rect; 21eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikasimport android.graphics.RectF; 22a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.view.View; 23a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesimport android.view.ViewGroup; 24eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikasimport android.view.ViewParent; 25a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 26a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banesclass ViewGroupUtils { 27eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas private static final ThreadLocal<Matrix> sMatrix = new ThreadLocal<>(); 28eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas private static final ThreadLocal<RectF> sRectF = new ThreadLocal<>(); 29a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 30a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 31a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * This is a port of the common 32a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * {@link ViewGroup#offsetDescendantRectToMyCoords(android.view.View, android.graphics.Rect)} 33a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * from the framework, but adapted to take transformations into account. The result 34a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * will be the bounding rect of the real transformed rect. 35a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 36a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @param descendant view defining the original coordinate system of rect 37a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @param rect (in/out) the rect to offset from descendant to this view's coordinate system 38a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 39a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes static void offsetDescendantRect(ViewGroup parent, View descendant, Rect rect) { 40eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas Matrix m = sMatrix.get(); 41eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas if (m == null) { 42eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas m = new Matrix(); 43eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas sMatrix.set(m); 44eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas } else { 45eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas m.reset(); 46eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas } 47eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas 48eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas offsetDescendantMatrix(parent, descendant, m); 49eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas 50eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas RectF rectF = sRectF.get(); 51eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas if (rectF == null) { 52eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas rectF = new RectF(); 53eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas sRectF.set(rectF); 54eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas } 55eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas rectF.set(rect); 56eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas m.mapRect(rectF); 57eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas rect.set((int) (rectF.left + 0.5f), (int) (rectF.top + 0.5f), 58eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas (int) (rectF.right + 0.5f), (int) (rectF.bottom + 0.5f)); 59a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 60a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 61a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes /** 62a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * Retrieve the transformed bounding rect of an arbitrary descendant view. 63a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * This does not need to be a direct child. 64a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * 65a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @param descendant descendant view to reference 66a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes * @param out rect to set to the bounds of the descendant view 67a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes */ 68a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes static void getDescendantRect(ViewGroup parent, View descendant, Rect out) { 69a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes out.set(0, 0, descendant.getWidth(), descendant.getHeight()); 70a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes offsetDescendantRect(parent, descendant, out); 71a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes } 72a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes 73eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas private static void offsetDescendantMatrix(ViewParent target, View view, Matrix m) { 74eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas final ViewParent parent = view.getParent(); 75eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas if (parent instanceof View && parent != target) { 76eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas final View vp = (View) parent; 77eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas offsetDescendantMatrix(target, vp, m); 78eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas m.preTranslate(-vp.getScrollX(), -vp.getScrollY()); 79eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas } 80eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas 81eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas m.preTranslate(view.getLeft(), view.getTop()); 82eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas 83eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas if (!view.getMatrix().isIdentity()) { 84eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas m.preConcat(view.getMatrix()); 85eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas } 86eb316dbe383d6bba158527b2eafa9b7c982dbd99Aurimas Liutikas } 87a6a508b2296730ca6954aaebcca52a9962a5cb55Chris Banes} 88