1/* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except 5 * in compliance with the License. You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software distributed under the License 10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express 11 * or implied. See the License for the specific language governing permissions and limitations under 12 * the License. 13 */ 14package android.support.v17.leanback.widget; 15 16import android.support.v17.leanback.R; 17import android.view.LayoutInflater; 18import android.view.View; 19import android.view.ViewGroup; 20 21class ShadowHelperJbmr2 { 22 23 static class ShadowImpl { 24 View mNormalShadow; 25 View mFocusShadow; 26 } 27 28 /* prepare parent for allowing shadows of a child */ 29 public static void prepareParent(ViewGroup parent) { 30 parent.setLayoutMode(ViewGroup.LAYOUT_MODE_OPTICAL_BOUNDS); 31 } 32 33 /* add shadows and return a implementation detail object */ 34 public static Object addShadow(ViewGroup shadowContainer) { 35 shadowContainer.setLayoutMode(ViewGroup.LAYOUT_MODE_OPTICAL_BOUNDS); 36 LayoutInflater inflater = LayoutInflater.from(shadowContainer.getContext()); 37 inflater.inflate(R.layout.lb_shadow, shadowContainer, true); 38 ShadowImpl impl = new ShadowImpl(); 39 impl.mNormalShadow = shadowContainer.findViewById(R.id.lb_shadow_normal); 40 impl.mFocusShadow = shadowContainer.findViewById(R.id.lb_shadow_focused); 41 return impl; 42 } 43 44 /* set shadow focus level 0 for unfocused 1 for fully focused */ 45 public static void setShadowFocusLevel(Object impl, float level) { 46 ShadowImpl shadowImpl = (ShadowImpl) impl; 47 shadowImpl.mNormalShadow.setAlpha(1 - level); 48 shadowImpl.mFocusShadow.setAlpha(level); 49 } 50} 51