What I'm trying to implement is essentially the cancel button of a browser but using JavaFX's webview. This is the code I have so far:
Worker<Void> loadWorker = webView.getEngine().getLoadWorker();
if (loadWorker != null) {
Platform.runLater(() -> loadWorker.cancel());
}
but it sometimes work and sometimes doesn't.
What's the proper way of canceling the webview/webengine task of loading a page?
After canceling the webEngine task, can you try with setting the content of the webEngine to null :
webView.getEngine().load(null);
The table in the WebEngine states the JavaScript user interface methods and properties with their corresponding WebEngine callbacks.
Where window.close() corresponds to the onVisibilityChanged callback of the WebEngine.
A quick way to try out, in that case, could be :
webEngine.getOnVisibilityChanged().handle(closeWindowEvent); //event definition below
followed by a
webEngine.executeScript("window.close()");
Another way in which you make sure the window is closed is to define an event which could be dispatched by the WebView's EventDispatcher for the current node.
// Here the event to be dispatched for closing the window shall be
WebEvent<Boolean> closeWindowEvent = new WebEvent<>(webEngine, VISIBILITY_CHANGED, Boolean.FALSE);
webView.getEventDispatcher().dispatchEvent(closeWindowEvent, null); // no further events
In case of trying to cancel loading the web page only, you can make use of the executeScript to do:
webEngine.executeScript("window.stop()");