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import javafx.application.Application;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.stage.Stage;
import javafx.stage.WindowEvent;
/**
* Class <b>App</b> - extends class Application and it is an entry point of the program
* @author Java I
*/
public class App extends Application {
public static void main(String[] args) {
launch(args);
}
private Canvas canvas;
@Override
public void start(Stage primaryStage) {
try {
//Construct a main window with a canvas.
Group root = new Group();
canvas = new Canvas(800, 400);
root.getChildren().add(canvas);
Scene scene = new Scene(root, 800, 400);
scene.getStylesheets().add(getClass().getResource("application.css").toExternalForm());
primaryStage.setScene(scene);
primaryStage.resizableProperty().set(false);
animationTimer = new AnimationTimer() {
private Long previous;
@Override
public void handle(long now) {
if (previous == null) {
previous = now;
} else {
drawScene((now - previous)/1e9);
previous = now;
}
}
};
animationTimer.start();
//Exit program when main window is closed
primaryStage.setOnCloseRequest(this::exitProgram);
} catch (Exception e) {
e.printStackTrace();
}
}
/**
* Draws objects into the canvas. Put you code here.
*
*@return nothing
*/
//graphic context is used for a painting
GraphicsContext gc = canvas.getGraphicsContext2D();