Interface FontInterface

The memory representation of a font in the FontLoaderInterface.

FontInterface are retrieved through FontLoaderInterface.getRegisteredFonts.

/** 
 * Sample to illustrate the loading of fonts.
 */
import { FontLoaderInterface, InfiniteFactory, FontLoaderInterfaceSignal, InfiniteEvent, FontLoadingStatus, FontInterface } from 'generated_files/documentation/appinfiniteapi';

// font loading is used wheen loading annotations

// what to do when fonts are loaded
let lFontLoaded : (pEvent : InfiniteEvent) => void;
// get the font loader, no need to create it, all the time available (singleton)
const lFontLoader : FontLoaderInterface = InfiniteFactory.GetInfiniteApiController().getFontLoader();
// register font Open Sans normal (no bold, no italic) by its url
const lFontRegistered : boolean = lFontLoader.registerFont('Open Sans', false, false, 'resources/fonts/OpenSans-Regular.otf');
console.assert(lFontRegistered, 'font should be registered');

// what to do when fonts is loaded ?
lFontLoader.addEventListener(FontLoaderInterfaceSignal.FontsLoaded, lFontLoaded);
// load explicitly font, if not, font will be loaded if required when loading annotations
const lLoadStatus : FontLoadingStatus = lFontLoader.loadFont('Open Sans', false, false);
console.assert(lLoadStatus === FontLoadingStatus.FLS_LoadingStarted, 'Font loading should be started');

// when fonts are loaded => what do we do ?
// perhaps some gui code ?
lFontLoaded = (_pEvent : InfiniteEvent) : void =>
{
    // get all registered fonts and their status
    const lFonts : Array<FontInterface> = [];
    lFontLoader.getRegisteredFonts(lFonts);
    let i : number;
    let lErrorCount : number = 0;
    for (i = 0; i < lFonts.length; i += 1)
    {
        if (lFonts[i].error !== undefined)
        {
            lErrorCount += 1;
        }
    }
    console.assert(lErrorCount === 0, 'There should be no font in error');
    // when font is loaded, we unload it, but perhaps we should make some gui code ? :)
    lFontLoader.unregisterFont('Open Sans', false, false);
};

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Please make sure the destination browser supports promises before using async calls.

See

FontLoaderInterface