/*global define*/
define([
'../../Core/defaultValue',
'../../Core/defined',
'../../Core/defineProperties',
'../../Core/destroyObject',
'../../Core/DeveloperError',
'../../Core/EventHelper',
'../../Scene/SceneMode',
'../../ThirdParty/knockout',
'../createCommand'
], function(
defaultValue,
defined,
defineProperties,
destroyObject,
DeveloperError,
EventHelper,
SceneMode,
knockout,
createCommand) {
'use strict';
/**
* The view model for {@link SceneModePicker}.
* @alias SceneModePickerViewModel
* @constructor
*
* @param {Scene} scene The Scene to morph
* @param {Number} [duration=2.0] The duration of scene morph animations, in seconds
*/
function SceneModePickerViewModel(scene, duration) {
//>>includeStart('debug', pragmas.debug);
if (!defined(scene)) {
throw new DeveloperError('scene is required.');
}
//>>includeEnd('debug');
this._scene = scene;
var that = this;
var morphStart = function(transitioner, oldMode, newMode, isMorphing) {
that.sceneMode = newMode;
that.dropDownVisible = false;
};
this._eventHelper = new EventHelper();
this._eventHelper.add(scene.morphStart, morphStart);
this._duration = defaultValue(duration, 2.0);
/**
* Gets or sets the current SceneMode. This property is observable.
* @type {SceneMode}
*/
this.sceneMode = scene.mode;
/**
* Gets or sets whether the button drop-down is currently visible. This property is observable.
* @type {Boolean}
* @default false
*/
this.dropDownVisible = false;
/**
* Gets or sets the 2D tooltip. This property is observable.
* @type {String}
* @default '2D'
*/
this.tooltip2D = '2D';
/**
* Gets or sets the 3D tooltip. This property is observable.
* @type {String}
* @default '3D'
*/
this.tooltip3D = '3D';
/**
* Gets or sets the Columbus View tooltip. This property is observable.
* @type {String}
* @default 'Columbus View'
*/
this.tooltipColumbusView = 'Columbus View';
knockout.track(this, ['sceneMode', 'dropDownVisible', 'tooltip2D', 'tooltip3D', 'tooltipColumbusView']);
/**
* Gets the currently active tooltip. This property is observable.
* @type {String}
*/
this.selectedTooltip = undefined;
knockout.defineProperty(this, 'selectedTooltip', function() {
var mode = that.sceneMode;
if (mode === SceneMode.SCENE2D) {
return that.tooltip2D;
}
if (mode === SceneMode.SCENE3D) {
return that.tooltip3D;
}
return that.tooltipColumbusView;
});
this._toggleDropDown = createCommand(function() {
that.dropDownVisible = !that.dropDownVisible;
});
this._morphTo2D = createCommand(function() {
scene.morphTo2D(that._duration);
});
this._morphTo3D = createCommand(function() {
scene.morphTo3D(that._duration);
});
this._morphToColumbusView = createCommand(function() {
scene.morphToColumbusView(that._duration);
});
//Used by knockout
this._sceneMode = SceneMode;
}
defineProperties(SceneModePickerViewModel.prototype, {
/**
* Gets the scene
* @memberof SceneModePickerViewModel.prototype
* @type {Scene}
*/
scene : {
get : function() {
return this._scene;
}
},
/**
* Gets or sets the the duration of scene mode transition animations in seconds.
* A value of zero causes the scene to instantly change modes.
* @memberof SceneModePickerViewModel.prototype
* @type {Number}
*/
duration : {
get : function() {
return this._duration;
},
set : function(value) {
//>>includeStart('debug', pragmas.debug);
if (value < 0.0) {
throw new DeveloperError('duration value must be positive.');
}
//>>includeEnd('debug');
this._duration = value;
}
},
/**
* Gets the command to toggle the drop down box.
* @memberof SceneModePickerViewModel.prototype
*
* @type {Command}
*/
toggleDropDown : {
get : function() {
return this._toggleDropDown;
}
},
/**
* Gets the command to morph to 2D.
* @memberof SceneModePickerViewModel.prototype
*
* @type {Command}
*/
morphTo2D : {
get : function() {
return this._morphTo2D;
}
},
/**
* Gets the command to morph to 3D.
* @memberof SceneModePickerViewModel.prototype
*
* @type {Command}
*/
morphTo3D : {
get : function() {
return this._morphTo3D;
}
},
/**
* Gets the command to morph to Columbus View.
* @memberof SceneModePickerViewModel.prototype
*
* @type {Command}
*/
morphToColumbusView : {
get : function() {
return this._morphToColumbusView;
}
}
});
/**
* @returns {Boolean} true if the object has been destroyed, false otherwise.
*/
SceneModePickerViewModel.prototype.isDestroyed = function() {
return false;
};
/**
* Destroys the view model.
*/
SceneModePickerViewModel.prototype.destroy = function() {
this._eventHelper.removeAll();
destroyObject(this);
};
return SceneModePickerViewModel;
});