| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| * |
| */ |
| |
| /* |
| * This class provides access to the device orientation. |
| * @constructor |
| */ |
| function Orientation() { |
| this.started = false; |
| }; |
| |
| /* |
| * Manually sets the orientation of the application window. |
| * 'up', 'down', 'left' or 'right' used to specify fixed window orientation |
| * 'free' WebOS will change the window orientation to match the device orientation |
| * @param {String} orientation |
| * Example: |
| * navigator.orientation.setOrientation('up'); |
| */ |
| Orientation.prototype.setOrientation = function(orientation) { |
| PalmSystem.setWindowOrientation(orientation); |
| }; |
| |
| /* |
| * Returns the current window orientation |
| */ |
| Orientation.prototype.getCurrentOrientation = function() { |
| return PalmSystem.windowOrientation; |
| }; |
| |
| /* |
| * Starts the native orientationchange event listener. |
| */ |
| Orientation.prototype.start = function (successCallback) { |
| var that = this; |
| // This subscribes the callback once for the successCallback function |
| that.callback = function (e) { |
| document.removeEventListener("orientationChanged", that.callback); |
| successCallback(e.orientation); |
| } |
| |
| document.addEventListener("orientationChanged", that.callback); |
| |
| // This subscribes setOrientation to be constantly updating the currentOrientation property |
| document.addEventListener("orientationchange", function(event) { |
| var orient = null; |
| switch (event.position) { |
| case 0: orient = DisplayOrientation.FACE_UP; break; |
| case 1: orient = DisplayOrientation.FACE_DOWN; break; |
| case 2: orient = DisplayOrientation.PORTRAIT; break; |
| case 3: orient = DisplayOrientation.REVERSE_PORTRAIT; break; |
| case 4: orient = DisplayOrientation.LANDSCAPE_RIGHT_UP; break; |
| case 5: orient = DisplayOrientation.LANDSCAPE_LEFT_UP; break; |
| default: return; //orientationchange event seems to get thrown sometimes with a null event position |
| } |
| that.setOrientation(orient); |
| }); |
| this.started = true; |
| }; |
| |
| /* |
| * Asynchronously aquires the orientation repeatedly at a given interval. |
| * @param {Function} successCallback The function to call each time the orientation |
| * data is available. |
| * @param {Function} errorCallback The function to call when there is an error |
| * getting the orientation data. |
| */ |
| Orientation.prototype.watchOrientation = function(successCallback, errorCallback, options) { |
| // Invoke the appropriate callback with a new Position object every time the implementation |
| // determines that the position of the hosting device has changed. |
| this.getCurrentOrientation(successCallback, errorCallback); |
| var interval = 1000; |
| if (options && !isNaN(options.interval)) |
| interval = options.interval; |
| var that = this; |
| return setInterval(function() { |
| that.getCurrentOrientation(successCallback, errorCallback); |
| }, interval); |
| }; |
| |
| /* |
| * Clears the specified orientation watch. |
| * @param {String} watchId The ID of the watch returned from #watchOrientation. |
| */ |
| Orientation.prototype.clearWatch = function(watchId) { |
| clearInterval(watchId); |
| }; |
| |
| /* |
| * This class encapsulates the possible orientation values. |
| * @constructor |
| */ |
| function DisplayOrientation() { |
| this.code = null; |
| this.message = ""; |
| }; |
| |
| DisplayOrientation.PORTRAIT = 0; |
| DisplayOrientation.REVERSE_PORTRAIT = 1; |
| DisplayOrientation.LANDSCAPE_LEFT_UP = 2; |
| DisplayOrientation.LANDSCAPE_RIGHT_UP = 3; |
| DisplayOrientation.FACE_UP = 4; |
| DisplayOrientation.FACE_DOWN = 5; |
| |
| if (typeof navigator.orientation == "undefined") navigator.orientation = new Orientation(); |
| |