java - javafx communication between controllers -

i'm new in javafx, need in sharing data between 2 controllers.

i have simple window has simple menu:

@fxml label labellabel;  @fxml menuitem sbor;  @fxml menuitem alim_poluch;  @fxml menuitem paragraphs;  @fxml menuitem poluch_cat;  @fxml menuitem visluga_vid;   @fxml anchorpane menupane;   @fxml mdicanvas mdicanvas;  @fxml tab tabone;  @fxml vislugavidcontroller vid;  @fxml tab tabtwo;  @fxml public void initialize() {      mdicanvas mdicanvas = new mdicanvas(mdicanvas.theme.default);     menupane.getchildren().add(mdicanvas);      anchorpane.setbottomanchor(mdicanvas, -1d);     anchorpane.setleftanchor(mdicanvas, 0d);     anchorpane.settopanchor(mdicanvas, 0d);//button place     anchorpane.setrightanchor(mdicanvas, 0d);       sbor.setonaction(new eventhandler<actionevent>() {         public void handle(actionevent event) {             stage stage = new stage();             anchorpane pane = null;             try {                 pane = fxmlloader.load(getclass().getresource("/fxml/spr_pocht_sbor.fxml"));             } catch (ioexception e) {                 system.err.print("can't open resource file");                 e.printstacktrace();             }             stage.settitle("Почтовый сбор для перевода алиментов");             stage.setresizable(false);             scene scene = new scene(pane, 600, 450);             stage.setscene(scene);             stage.show();         }     });      alim_poluch.setonaction(new eventhandler<actionevent>() {         public void handle(actionevent event) {             stage stage = new stage();             anchorpane pane = null;             try {                 pane = fxmlloader.load(getclass().getresource("/fxml/spr_alim_poluch.fxml"));             } catch (ioexception e) {                 e.printstacktrace();             }              stage.setresizable(false);             stage.settitle("Справочник получателей алиментов");             scene scene = new scene(pane, 800, 640);             stage.setscene(scene);             stage.show();         }     });      paragraphs.setonaction(new eventhandler<actionevent>() {         public void handle(actionevent event) {             stage stage = new stage();             anchorpane pane = null;             try {                 pane = fxmlloader.load(getclass().getresource("/fxml/paragraf.fxml"));             } catch (ioexception e) {                 e.printstacktrace();             }              stage.setresizable(false);             stage.settitle("Параграф назначения денежных средств");             scene scene = new scene(pane, 300, 450);             stage.setscene(scene);             stage.show();         }     });      poluch_cat.setonaction(new eventhandler<actionevent>() {         public void handle(actionevent event) {             stage stage = new stage();             anchorpane pane = null;             try {                 pane = fxmlloader.load(getclass().getresource("/fxml/poluch_cat.fxml"));             } catch (ioexception e) {                 e.printstacktrace();             }              stage.setresizable(false);             stage.settitle("Категории получателей");             scene scene = new scene(pane, 600, 450);             stage.setscene(scene);             stage.show();         }     });      visluga_vid.setonaction(new eventhandler<actionevent>() {         @override         public void handle(actionevent event) {               anchorpane content = null;             try {                 content = fxmlloader.load(getclass().getresource("/fxml/visluga_vid.fxml"));             } catch (ioexception e) {                 e.printstacktrace();             }             mdiwindow mdiwindow = new mdiwindow("1", new imageview("/assets/windowicon.png"), "Виды выслуг", content);             button buttonmaximize = mdiwindow.getbtnmaximize();             buttonmaximize.setdisable(true);             mdiwindow.setmaxsize(350, 450);             mdiwindow.setbtnminimize(buttonmaximize);             mdicanvas.addmdiwindow(mdiwindow);           }     });   } 

when click @ menuitem visluga_vid.setonaction new mdi windows opening. want open window mdi window. mdiwindows has parent (mdicanvas), , mdicanvas has parent - anchorpane. mdiwindows has it's own controller , fxml file.

public class vislugavidcontroller {      @fxml     tableview vislugavidtable;      @fxml     textfield naim_vislugafield;      @fxml anchorpane menupane;      @fxml     public void initialize() {          //main.init(this);            vislugavidtable.setonmousepressed(event ->  {              if (event.isprimarybuttondown() && event.getclickcount() == 2) {                     system.out.println(vislugavidtable.getselectionmodel().getselecteditem());                     anchorpane content = null;                     try {                         content = fxmlloader.load(getclass().getresource("/fxml/visluga_nadb.fxml"));                     } catch (ioexception e) {                         e.printstacktrace();                     }                       mdiwindow mdiwindow = new mdiwindow("1", new imageview("/assets/windowicon.png"), "Надбавки", content);                     button buttonmaximize = mdiwindow.getbtnmaximize();                     buttonmaximize.setdisable(true);                     mdiwindow.setmaxsize(350, 450);                     mdiwindow.setbtnminimize(buttonmaximize);                     mdicanvas.addmdiwindow(mdiwindow);                    }          });      }   } 

how can share anchorpane , mdicanvas maincontroller mdiwindowcontroller open new mdiwindow?

normally answer question "how can share between 2 controllers" "use service". if think it, need pass data, somehow persisted between controllers.in javafx world should model.

each .fxml file create should handled 1 controller or presenter. think .fxml views combined controllers modules of application. provides reusability. application should consist of 1 or more modules.

i recommend check out the afterburner fx. in example can see in action how different modules communicate each other.