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| 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 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 | 11x 2x 9x 9x 9x 9x 9x 9x 9x 1x 1x 9x 9x 3x 3x 9x 1x 1x 2x 4x 1x 7x 7x 7x | import {
defined,
destroyObject,
DeveloperError,
FrameRateMonitor,
} from "@cesium/engine";
import knockout from "../ThirdParty/knockout.js";
import createCommand from "../createCommand.js";
/**
* The view model for {@link PerformanceWatchdog}.
*
* @alias PerformanceWatchdogViewModel
* @constructor
*
* @param {object} [options] Object with the following properties:
* @param {Scene} options.scene The Scene instance for which to monitor performance.
* @param {string} [options.lowFrameRateMessage='This application appears to be performing poorly on your system. Please try using a different web browser or updating your video drivers.'] The
* message to display when a low frame rate is detected. The message is interpeted as HTML, so make sure
* it comes from a trusted source so that your application is not vulnerable to cross-site scripting attacks.
*/
function PerformanceWatchdogViewModel(options) {
//>>includeStart('debug', pragmas.debug);
if (!defined(options) || !defined(options.scene)) {
throw new DeveloperError("options.scene is required.");
}
//>>includeEnd('debug');
this._scene = options.scene;
/**
* Gets or sets the message to display when a low frame rate is detected. This string will be interpreted as HTML.
* @type {string}
*/
this.lowFrameRateMessage =
options.lowFrameRateMessage ??
"This application appears to be performing poorly on your system. Please try using a different web browser or updating your video drivers.";
/**
* Gets or sets a value indicating whether the low frame rate message has previously been dismissed by the user. If it has
* been dismissed, the message will not be redisplayed, no matter the frame rate.
* @type {boolean}
*/
this.lowFrameRateMessageDismissed = false;
/**
* Gets or sets a value indicating whether the low frame rate message is currently being displayed.
* @type {boolean}
*/
this.showingLowFrameRateMessage = false;
knockout.track(this, [
"lowFrameRateMessage",
"lowFrameRateMessageDismissed",
"showingLowFrameRateMessage",
]);
const that = this;
this._dismissMessage = createCommand(function () {
that.showingLowFrameRateMessage = false;
that.lowFrameRateMessageDismissed = true;
});
const monitor = FrameRateMonitor.fromScene(options.scene);
this._unsubscribeLowFrameRate = monitor.lowFrameRate.addEventListener(
function () {
Eif (!that.lowFrameRateMessageDismissed) {
that.showingLowFrameRateMessage = true;
}
},
);
this._unsubscribeNominalFrameRate = monitor.nominalFrameRate.addEventListener(
function () {
that.showingLowFrameRateMessage = false;
},
);
}
Object.defineProperties(PerformanceWatchdogViewModel.prototype, {
/**
* Gets the {@link Scene} instance for which to monitor performance.
* @memberof PerformanceWatchdogViewModel.prototype
* @type {Scene}
*/
scene: {
get: function () {
return this._scene;
},
},
/**
* Gets a command that dismisses the low frame rate message. Once it is dismissed, the message
* will not be redisplayed.
* @memberof PerformanceWatchdogViewModel.prototype
* @type {Command}
*/
dismissMessage: {
get: function () {
return this._dismissMessage;
},
},
});
PerformanceWatchdogViewModel.prototype.destroy = function () {
this._unsubscribeLowFrameRate();
this._unsubscribeNominalFrameRate();
return destroyObject(this);
};
export default PerformanceWatchdogViewModel;
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