1 /* 2 * Copyright (C) 2014 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.testingcamera2; 18 19 import java.util.ArrayList; 20 import java.util.HashSet; 21 import java.util.List; 22 import java.util.Set; 23 24 import android.os.Handler; 25 import android.os.Looper; 26 27 /** 28 * Tracks currently-available panes of various kinds, for other panes to find targets/etc. 29 * 30 */ 31 public class PaneTracker { 32 33 private Set<ControlPane> mActivePanes = new HashSet<ControlPane>(); 34 private Set<PaneSetChangedListener<?>> mActiveListeners = new HashSet<PaneSetChangedListener<?>>(); 35 36 /** 37 * Various events panes might alert other panes about 38 */ 39 public enum PaneEvent { 40 NEW_CAMERA_SELECTED, 41 CAMERA_CONFIGURED 42 } 43 PaneTracker()44 public PaneTracker() { 45 } 46 addPane(ControlPane pane)47 public void addPane(ControlPane pane) { 48 boolean added = mActivePanes.add(pane); 49 if (!added) return; 50 for (PaneSetChangedListener<?> listener : mActiveListeners) { 51 if (listener.getFilterType().isInstance(pane)) { 52 listener.onPaneAdded(pane); 53 } 54 } 55 } 56 removePane(ControlPane pane)57 public void removePane(ControlPane pane) { 58 boolean existed = mActivePanes.remove(pane); 59 if (!existed) return; 60 for (PaneSetChangedListener<?> listener : mActiveListeners) { 61 if (listener.getFilterType().isInstance(pane)) { 62 listener.onPaneRemoved(pane); 63 } 64 } 65 } 66 getPanes(Class<T> paneClass)67 public <T extends ControlPane> List<T> getPanes(Class<T> paneClass) { 68 List<T> filteredPanes = new ArrayList<T>(); 69 for (ControlPane pane : mActivePanes ) { 70 if (paneClass.isInstance(pane)) { 71 filteredPanes.add(paneClass.cast(pane)); 72 } 73 } 74 return filteredPanes; 75 } 76 notifyOtherPanes(final ControlPane sourcePane, final PaneEvent event)77 public void notifyOtherPanes(final ControlPane sourcePane, final PaneEvent event) { 78 Handler mainHandler = new Handler(Looper.getMainLooper()); 79 mainHandler.post(new Runnable() { 80 public void run() { 81 for (ControlPane pane: mActivePanes ) { 82 pane.notifyPaneEvent(sourcePane, event); 83 } 84 } 85 }); 86 } 87 88 /** 89 * Notify all panes that the UI orientation has changed 90 * 91 * @param orientation one of the Surface.ROTATION_* constants 92 */ notifyOrientationChange(int orientation)93 public void notifyOrientationChange(int orientation) { 94 for (ControlPane pane: mActivePanes ) { 95 pane.onOrientationChange(orientation); 96 } 97 } 98 addPaneListener(PaneSetChangedListener<?> listener)99 public void addPaneListener(PaneSetChangedListener<?> listener) { 100 mActiveListeners.add(listener); 101 } 102 removePaneListener(PaneSetChangedListener<?> listener)103 public void removePaneListener(PaneSetChangedListener<?> listener) { 104 mActiveListeners.remove(listener); 105 } 106 107 /** 108 * Interface for clients to listen to additions and removals of panes 109 * of specific types. 110 */ 111 public static abstract class PaneSetChangedListener<T extends ControlPane> { 112 private Class<T> mFilterType; 113 PaneSetChangedListener(Class<T> filterType)114 public PaneSetChangedListener(Class<T> filterType) { 115 mFilterType = filterType; 116 } 117 getFilterType()118 public Class<T> getFilterType() { 119 return mFilterType; 120 } 121 onPaneAdded(ControlPane pane)122 public abstract void onPaneAdded(ControlPane pane); onPaneRemoved(ControlPane pane)123 public abstract void onPaneRemoved(ControlPane pane); 124 } 125 126 } 127