洪水淹没

guoshilong

2023-02-27 4d8c6dd77427e8e581fda17b6b65ba86bfb7a815

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
import defined from '../../Core/defined.js';
import DeveloperError from '../../Core/DeveloperError.js';
import knockout from '../../ThirdParty/knockout.js';
import createCommand from '../createCommand.js';
 
    /**
     * The view model for {@link HomeButton}.
     * @alias HomeButtonViewModel
     * @constructor
     *
     * @param {Scene} scene The scene instance to use.
     * @param {Number} [duration] The duration of the camera flight in seconds.
     */
    function HomeButtonViewModel(scene, duration) {
        //>>includeStart('debug', pragmas.debug);
        if (!defined(scene)) {
            throw new DeveloperError('scene is required.');
        }
        //>>includeEnd('debug');
 
        this._scene = scene;
        this._duration = duration;
 
        var that = this;
        this._command = createCommand(function() {
            that._scene.camera.flyHome(that._duration);
        });
 
        /**
         * Gets or sets the tooltip.  This property is observable.
         *
         * @type {String}
         */
        this.tooltip = 'View Home';
 
        knockout.track(this, ['tooltip']);
    }
 
    Object.defineProperties(HomeButtonViewModel.prototype, {
        /**
         * Gets the scene to control.
         * @memberof HomeButtonViewModel.prototype
         *
         * @type {Scene}
         */
        scene : {
            get : function() {
                return this._scene;
            }
        },
 
        /**
         * Gets the Command that is executed when the button is clicked.
         * @memberof HomeButtonViewModel.prototype
         *
         * @type {Command}
         */
        command : {
            get : function() {
                return this._command;
            }
        },
 
        /**
         * Gets or sets the the duration of the camera flight in seconds.
         * A value of zero causes the camera to instantly switch to home view.
         * The duration will be computed based on the distance when undefined.
         * @memberof HomeButtonViewModel.prototype
         *
         * @type {Number|undefined}
         */
        duration : {
            get : function() {
                return this._duration;
            },
            set : function(value) {
                //>>includeStart('debug', pragmas.debug);
                if (defined(value) && value < 0) {
                    throw new DeveloperError('value must be positive.');
                }
                //>>includeEnd('debug');
 
                this._duration = value;
            }
        }
    });
export default HomeButtonViewModel;