GWT - Javascript to GWT calls

JavaScipt and GWT interoperation are base on JSNI (JavaScript Native Interface)

See this link for GWT definition and format of JSNI http://code.google.com/docreader/#p=google-web-toolkit-doc-1-5&s=google-web-toolkit-doc-1-5&t=DevGuideInterop

Note: A JSNI comment block begins with the exact token /*-{ and ends with the exact token }-*/.

Here is an example of JSNI in GWT

public static native void alert(String msg) /*-{

$wnd.alert(msg);

}-*/;

Tips: When accessing the browser's window and document objects from JSNI, you must reference them as $wnd and $doc, respectively.

JSNI's param-signature follows Java data type declaration

For example myMethod(IFLjava/lang/String;)(); refers to this methoda has 3 parameters of Integer, Float and String

Consider the following which generate a HTML code, register a JS method and provide a call back

Add genHtml() to a Panel. Ie, panel.setHtml(genHtml()); If you onClick to the link, it will call onLinkClicked. This way, you can interact with your GWT application