public class FontLoader
extends java.lang.Object
current skin's CSS file and
 updates any potentially-affected, already-drawn canvii when loading completes.  Without FontLoader, auto-sized canvii
 that use custom fonts may end up with the wrong size if a page is loaded when its custom fonts are not available in the
 browser cache.  To disable FontLoader, set  window.isc_loadCustomFonts = false  before Smart
 GWT is loaded. 
  If you want to avoid the Framework redrawing canvii after the fonts load, you may want to code your
 app to delay drawing anything until the skin fonts are loaded.  You can check isLoadingComplete() to see whether loading is done, and if it's
 not, you can  call addFontsLoadedHandler() to run code when it's done or  addFontLoadingFailedHandler() to run code if there's an error. 
FontLoader will use the new  CSS Font Loading API in
 browsers in which it's available and has proven reliable.  Otherwise, we fall back to canvas measurement techniques to
 detect loading.  To force fallback and avoid the API, set  window.isc_useCSSFontAPI = false , or
 to force the API to be used (where it exists but may be unreliable) set  window.isc_useCSSFontAPI = 
 true , before Smart GWT is loaded.  If you're loading additional style sheets, beyond the skin, that
 declare custom fonts with @font-face, you can request that the FontLoader force-load them as well by
 specifying them in window.isc_additionalFonts as an array of the font family names matching those from the
 @font-face declarations. 
Note that currently, if you have more than one font with the same font family name in your CSS, you'll need to use the CSS Font Loading API approach if you want them all loaded by the FontLoader. Under the measurement approach, the FontLoader is only able to load the default font for each font family, since it has no knowledge beyond the specified family names.
| Constructor and Description | 
|---|
| FontLoader() | 
| Modifier and Type | Method and Description | 
|---|---|
| static com.google.gwt.event.shared.HandlerRegistration | addFontLoadingFailedHandler(FontLoadingFailedHandler handler)Adds a handler that will be called if the FontLoader fails to load any of the custom skin
 fonts. | 
| static com.google.gwt.event.shared.HandlerRegistration | addFontsLoadedHandler(FontsLoadedHandler handler)Adds a handler that will be called when the FontLoader finishes loading any custom skin
 fonts. | 
| static boolean | isLoadingComplete()Whether all requested custom fonts have been loaded. | 
public static boolean isLoadingComplete()
FontLoader won't need to redraw any canvii drawn afterwards, and that a  FontsLoadedEvent or FontLoadingFailedEvent
 won't arrive (it may have previously been handled).public static com.google.gwt.event.shared.HandlerRegistration addFontsLoadedHandler(FontsLoadedHandler handler)
handler - loading finished handlerpublic static com.google.gwt.event.shared.HandlerRegistration addFontLoadingFailedHandler(FontLoadingFailedHandler handler)
handler - loading failed handler