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