| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.support.design.widget; |
| |
| import android.graphics.Matrix; |
| import android.graphics.Rect; |
| import android.graphics.RectF; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.ViewParent; |
| |
| class ViewGroupUtilsHoneycomb { |
| private static final ThreadLocal<Matrix> sMatrix = new ThreadLocal<>(); |
| private static final ThreadLocal<RectF> sRectF = new ThreadLocal<>(); |
| private static final Matrix IDENTITY = new Matrix(); |
| |
| public static void offsetDescendantRect(ViewGroup group, View child, Rect rect) { |
| Matrix m = sMatrix.get(); |
| if (m == null) { |
| m = new Matrix(); |
| sMatrix.set(m); |
| } else { |
| m.set(IDENTITY); |
| } |
| |
| offsetDescendantMatrix(group, child, m); |
| |
| RectF rectF = sRectF.get(); |
| if (rectF == null) { |
| rectF = new RectF(); |
| } |
| rectF.set(rect); |
| m.mapRect(rectF); |
| rect.set((int) (rectF.left + 0.5f), (int) (rectF.top + 0.5f), |
| (int) (rectF.right + 0.5f), (int) (rectF.bottom + 0.5f)); |
| } |
| |
| static void offsetDescendantMatrix(ViewParent target, View view, Matrix m) { |
| final ViewParent parent = view.getParent(); |
| if (parent instanceof View && parent != target) { |
| final View vp = (View) parent; |
| offsetDescendantMatrix(target, vp, m); |
| m.preTranslate(-vp.getScrollX(), -vp.getScrollY()); |
| } |
| |
| m.preTranslate(view.getLeft(), view.getTop()); |
| |
| if (!view.getMatrix().isIdentity()) { |
| m.preConcat(view.getMatrix()); |
| } |
| } |
| } |