how to fit a gridpane in javafx2 accross the whole scene - grid

Question

I would like to fit the gridbox accross the whole scene as per attached picture and code below, however i cannot whatever I do!!
I have tried generating empty rows and columns but still does not fill, unless i add a lot.
I would like to specify a number of rows and columns and then let the program divide these equally along the screen, please help
how can I also locate the text inside the table the the right of the cell?
#Override public void start(Stage stage) {
timer.start();
buildData_timer.start();
Group root = new Group();
Scene scene = new Scene(root, 1180, 650);
stage.setScene(scene);
stage.setTitle("Separator Sample");
scene.getStylesheets().addAll(this.getClass().getResource("style.css").toExternalForm());
GridPane Mainpane = new GridPane();
scene.setRoot(Mainpane);
Mainpane.setGridLinesVisible(true);
Mainpane.setId("Mainpane");
GridPane prayertime_pane = new GridPane();
prayertime_pane.setId("prayertime_pane");
prayertime_pane.setGridLinesVisible(true);
prayertime_pane.setPadding(new Insets(20, 20, 20, 20));
prayertime_pane.setVgap(20);
prayertime_pane.setHgap(35);
HBox clock1Box = new HBox();
clock1Box.setSpacing(0);
clock1Box.getChildren().addAll(clock);
HBox fajrBox = new HBox();
fajrBox.setSpacing(0);
fajrBox.setMaxSize(155, 54);
fajrBox.getChildren().addAll(fajr_hourLeft, fajr_hourRight, time_Separator1, fajr_minLeft, fajr_minRight);
prayertime_pane.setConstraints(fajrBox, 0, 1);
prayertime_pane.getChildren().add(fajrBox);
HBox zuhrBox = new HBox();
zuhrBox.setSpacing(0);
zuhrBox.setMaxSize(155, 54);
zuhrBox.getChildren().addAll(zuhr_hourLeft, zuhr_hourRight, time_Separator2, zuhr_minLeft, zuhr_minRight);
prayertime_pane.setConstraints(zuhrBox, 0, 2);
prayertime_pane.getChildren().add(zuhrBox);
HBox asrBox = new HBox();
asrBox.setSpacing(0);
asrBox.setMaxSize(155, 54);
asrBox.getChildren().addAll(asr_hourLeft, asr_hourRight, time_Separator3, asr_minLeft, asr_minRight);
prayertime_pane.setConstraints(asrBox, 0, 3);
prayertime_pane.getChildren().add(asrBox);
HBox maghribBox = new HBox();
maghribBox.setSpacing(0);
maghribBox.setMaxSize(155, 54);
maghribBox.getChildren().addAll(maghrib_hourLeft, maghrib_hourRight, time_Separator4, maghrib_minLeft, maghrib_minRight);
prayertime_pane.setConstraints(maghribBox, 0, 4);
prayertime_pane.getChildren().add(maghribBox);
HBox ishaBox = new HBox();
ishaBox.setSpacing(0);
ishaBox.setMaxSize(155, 54);
ishaBox.getChildren().addAll(isha_hourLeft, isha_hourRight, time_Separator5, isha_minLeft, isha_minRight);
prayertime_pane.setConstraints(ishaBox, 0, 5);
prayertime_pane.getChildren().add(ishaBox);
TextFlow fajrtextFlow = new TextFlow();
Text text1 = new Text("الفجر\n");
text1.setId("prayer-text-arabic");
Text text10 = new Text("Fajr");
text10.setId("prayer-text-english");
fajrtextFlow.getChildren().addAll(text1, text10);
prayertime_pane.setConstraints(fajrtextFlow, 1, 1);
prayertime_pane.getChildren().add(fajrtextFlow);
TextFlow duhrtextFlow = new TextFlow();
Text text2 = new Text("الظهر\n");
text2.setId("prayer-text-arabic");
Text text20 = new Text("Duhr");
text20.setId("prayer-text-english");
duhrtextFlow.getChildren().addAll(text2,text20);
prayertime_pane.setConstraints(duhrtextFlow, 1, 2);
prayertime_pane.getChildren().add(duhrtextFlow);
TextFlow asrFlow = new TextFlow();
Text text3 = new Text("العصر\n");
text3.setId("prayer-text-arabic");
Text text30 = new Text("Asr");
text30.setId("prayer-text-english");
asrFlow.getChildren().addAll(text3,text30);
prayertime_pane.setConstraints(asrFlow, 1, 3);
prayertime_pane.getChildren().add(asrFlow);
TextFlow maghribFlow = new TextFlow();
Text text4 = new Text("المغرب\n");
text4.setId("prayer-text-arabic");
Text text40 = new Text("Maghrib");
text40.setId("prayer-text-english");
maghribFlow.getChildren().addAll(text4,text40);
prayertime_pane.setConstraints(maghribFlow, 1, 4);
prayertime_pane.getChildren().add(maghribFlow);
TextFlow ishaFlow = new TextFlow();
Text text5 = new Text("العشاء\n");
text5.setId("prayer-text-arabic");
Text text50 = new Text("Isha");
text50.setId("prayer-text-english");
ishaFlow.getChildren().addAll(text5,text50);
prayertime_pane.setConstraints(ishaFlow, 1, 5);
prayertime_pane.getChildren().add(ishaFlow);
final Separator sepHor = new Separator();
// sepHor.setAlignment(Pos.CENTER_LEFT);
// sepHor.setOrientation(Orientation.HORIZONTAL);
prayertime_pane.setConstraints(sepHor, 0, 1);
prayertime_pane.setColumnSpan(sepHor, 2);
prayertime_pane.getChildren().add(sepHor);
Mainpane.setConstraints(prayertime_pane, 2, 3);
Mainpane.getChildren().add(prayertime_pane);
Mainpane.setConstraints(clock1Box, 7, 1);
Mainpane.getChildren().add(clock1Box);
stage.show();
// stage.setFullScreen(true);
}

Answer 1

Try
ColumnConstraints c1 = new ColumnConstraints();
c1.setHgrow(Priority.ALWAYS);
ColumnConstraints c2 = new ColumnConstraints();
c2.setHgrow(Priority.NEVER);
Mainpane.getColumnConstraints().addAll(c1, c2);
RowConstraints r1 = new RowConstraints();
r1.setVgrow(Priority.NEVER);
RowConstraints r2 = new RowConstraints();
r2.setVgrow(Priority.ALWAYS);
Mainpane.getRowConstraints().addAll(r1, r2);
For more row/column/cell settings investigate GridPane, RowConstraints and ColumnConstraints.
However I suggest you to use AnchorPane or BorderPane here.