1 /* 2 * Copyright (C) 2012 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.contacts.widget; 18 19 import android.content.Context; 20 import android.util.AttributeSet; 21 import android.view.View; 22 import android.view.ViewGroup; 23 import android.widget.FrameLayout; 24 25 /** 26 * A FrameLayout whose contents are kept beneath an {@link AlphaTouchInterceptorOverlay}. 27 * If necessary, you can specify your own alpha-layer and manually manage its z-order. 28 */ 29 public class FrameLayoutWithOverlay extends FrameLayout { 30 private final AlphaTouchInterceptorOverlay mOverlay; 31 FrameLayoutWithOverlay(Context context, AttributeSet attrs)32 public FrameLayoutWithOverlay(Context context, AttributeSet attrs) { 33 super(context, attrs); 34 35 // Programmatically create touch-interceptor View. 36 mOverlay = new AlphaTouchInterceptorOverlay(context); 37 38 addView(mOverlay); 39 } 40 41 /** After adding the View, bring the overlay to the front to ensure it's always on top. */ 42 @Override addView(View child, int index, ViewGroup.LayoutParams params)43 public void addView(View child, int index, ViewGroup.LayoutParams params) { 44 super.addView(child, index, params); 45 mOverlay.bringToFront(); 46 } 47 48 /** 49 * Delegate to overlay: set the View that it will use as its alpha-layer. 50 * If none is set, the overlay will use its own alpha layer. Only 51 * necessary to set this if some child views need to appear above the 52 * alpha-layer. 53 */ setAlphaLayer(View layer)54 protected void setAlphaLayer(View layer) { 55 mOverlay.setAlphaLayer(layer); 56 } 57 58 /** Delegate to overlay: set the alpha value on the alpha layer. */ setAlphaLayerValue(float alpha)59 public void setAlphaLayerValue(float alpha) { 60 mOverlay.setAlphaLayerValue(alpha); 61 } 62 63 /** Delegate to overlay. */ setOverlayOnClickListener(OnClickListener listener)64 public void setOverlayOnClickListener(OnClickListener listener) { 65 mOverlay.setOverlayOnClickListener(listener); 66 } 67 68 /** Delegate to overlay. */ setOverlayClickable(boolean clickable)69 public void setOverlayClickable(boolean clickable) { 70 mOverlay.setOverlayClickable(clickable); 71 } 72 } 73