View of the application javafx - javafx

Question

i was searching in google for hours and i still cant find the right answer, so i have a last chance to come here and ask.
i'm making school year JAVA FX project. I'm using NetBeans.
I have a point that i can see on the application i have. The problem is: I would like to have a big map (background) and I need to be able to move with my view. For example move by 50 to the right (x).
I have Application where I use Stage, Scene, StackPane.
I heard something about Dimensions in Java, but i can't use it in javafx application. Is there something similar, what can I use in my Application?
Thank you very much.

Answer 1

What I think you are asking for is a Scene with a map (represented as an Image) in the background and controls layered on top of the map to allow interaction with the map at certain positions. Your question is a little unclear, so I'm not exactly sure if that is what you are asking.
If so, here is some sample code to implement that.
import javafx.application.Application;
import static javafx.application.Application.launch;
import javafx.event.*;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.image.*;
import javafx.scene.layout.*;
import javafx.stage.Stage;
/** Constructs a scene with a pannable Map background. */
public class PannableView extends Application {
private Image backgroundImage;
#Override public void init() {
backgroundImage = new Image("https://www.narniaweb.com/wp-content/uploads/2009/08/NarniaMap.jpg");
}
#Override public void start(Stage stage) {
stage.setTitle("Drag the mouse to pan the map");
// construct the scene contents over a stacked background.
StackPane layout = new StackPane();
layout.getChildren().setAll(
new ImageView(backgroundImage),
createKillButton()
);
// wrap the scene contents in a pannable scroll pane.
ScrollPane scroll = createScrollPane(layout);
// show the scene.
Scene scene = new Scene(scroll);
stage.setScene(scene);
stage.show();
// bind the preferred size of the scroll area to the size of the scene.
scroll.prefWidthProperty().bind(scene.widthProperty());
scroll.prefHeightProperty().bind(scene.widthProperty());
// center the scroll contents.
scroll.setHvalue(scroll.getHmin() + (scroll.getHmax() - scroll.getHmin()) / 2);
scroll.setVvalue(scroll.getVmin() + (scroll.getVmax() - scroll.getVmin()) / 2);
}
/** #return a control to place on the scene. */
private Button createKillButton() {
final Button killButton = new Button("Kill the evil witch");
killButton.setStyle("-fx-base: firebrick;");
killButton.setTranslateX(65);
killButton.setTranslateY(-130);
killButton.setOnAction(new EventHandler<ActionEvent>() {
#Override public void handle(ActionEvent t) {
killButton.setStyle("-fx-base: forestgreen;");
killButton.setText("Ding-Dong! The Witch is Dead");
}
});
return killButton;
}
/** #return a ScrollPane which scrolls the layout. */
private ScrollPane createScrollPane(Pane layout) {
ScrollPane scroll = new ScrollPane();
scroll.setHbarPolicy(ScrollPane.ScrollBarPolicy.NEVER);
scroll.setVbarPolicy(ScrollPane.ScrollBarPolicy.NEVER);
scroll.setPannable(true);
scroll.setPrefSize(800, 600);
scroll.setContent(layout);
return scroll;
}
public static void main(String[] args) { launch(args); }
}
For the example use the mouse (or probably touch commands or trackpad scroll gestures - though I haven't a touch screen or trackpad to test it) to drag the map around. Click on the button to "Kill the evil witch".
The solution works by:
Creating an ImageView to hold the background map.
Constructing the scene contents in a StackPane over the stacked background ImageView.
Wrapping the scene in a ScrollPane bound to the scene's size.
Setting properties on the ScrollPane to make it pannable.