OBrowserCallback

Sample code to demonstrate how to call an Omnis method from an HTMLControl embedded in an OBrowser control.

Contents:

• build/OBrowserCallback.lbs: the sample lib.
• OBrowserCallback: JSON source of the library
• htmlcontrols: the HTMLControls for the demo (it inclues also the Omnis JavaScript files).

Demo 1 - Direct callback call (Wnd_Main)

The "Set Callback" button of the window calls a function of the callback HTMLControl and passes to it some data (a string) and the full-notation path to the method that has to be called when a certain event (on the HTMLControl) occures.

The event which triggers the callback is the click on the HTMLControl button. When this event occurs, the jOmnis.sendControlEvent triggers che evControlEvent of the OBrowser Component and provide some data and the full-notation path to the Omnis method that needs to be called. Finally the event handler evaluates the notation and passed the event's payload has a parameter.

Demo 2 - Event from the HTMLControls (Wnd_OBrowserEvents)

The HTMLControl, after the execution of an asyncronous operation, sends an evControlEvent to the OBrowser with a custom event name. The OBrowser then handles the call by executing the private method with the same name as the custom event.