How to load a web page in a WebView by clicking on a button in other stage?

问题

i'm working on a browser with JavaFX i want to load a web page in FXMLFile1 contains WebView just by clicking on Button in FXMLFile2 to show the page in FXMLFile1 i tried this code :

@FXML
 public void tabfirst (ActionEvent ee) throws IOException { //for the FXMLFile2's button text.


            Socket socket = new Socket();
    try {

        //open cursor
        panoo.setCursor(Cursor.WAIT);
        que.setCursor(Cursor.WAIT);
        bbb.setCursor(Cursor.WAIT);

        //do work

        WebEngine myWebEngine = web1.getEngine(); //this web view is in FXMLFile1
        myWebEngine.load("https://www.google.com");



    }
   catch (IOException e){
       final  Stage stg = new Stage();           
        stg.initModality(Modality.APPLICATION_MODAL);
        stg.initOwner(stg);
        stg.setTitle("Cannot connect to the internet /n Please Verify your connection internet");
        labelno.setText("Cannot connect to the internet...");

       //set cursor
         ancpa.setCursor(Cursor.DEFAULT);

   } finally{
       try{ socket.close(); } catch (Exception e){ }
       }

}

note this class tabfirst is in the Button in the FXMLFile2 and the two FXMLfiles are in the same controller. so please can any body show me what's wrong with my code and thanks in advance!

回答1:

I don't think you are setting web1. I think that because the 2 FXML files are using the same controller (Edit: my bad, I misread/misunderstood) you are expecting that they are automatically sharing variables, which they do not !

When the FXMLLoader loads an FXML file it creates a new instance of the controller every time. So the controller instance from FXMLfile1 doesn't know about the controller instance of FXMLfile2 or any of its variables.

There are about 5 different ways of sharing information between controllers:

The simplest is just using getters and setters between the two.
Also fairly simple is to bind properties between the two.
You could setup listeners and then notify them of changes.
Use a messaging bus.
Use injection.

Which one you use depends on various factors and requires more information as to what you are trying to accomplish ?

A basic outline of options 1 & 2 would look something like this:

FXMLLoader  fxml1 = .....
fxml1.load();
ctrl1 = fxml1.getController();

FXMLLoader  fxml2 = .....
fxml2.load();
ctrl2 = fxml2.getController();

ctrl2.set????( ctrl1.get????() );  // get something from the one and set it in the other
// if the value in ctrl1 changes it does not necessarily change in ctrl2

ctrl2.property????().bind( ctrl1.property???? );  // ctrl2 binds to a property in ctrl1
// if the value of the ctrl1 property changes it WILL also change in ctrl2

来源：https://stackoverflow.com/questions/28349951/how-to-load-a-web-page-in-a-webview-by-clicking-on-a-button-in-other-stage

标签

webview

javafx