CS

import javafx.application.Application; import javafx.stage.Stage; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.layout.VBox; import javafx.scene.layout.FlowPane; import javafx.scene.text.Text; import javafx.geometry.Pos; import javafx.geometry.Insets; import javafx.event.ActionEvent; /** * Project 3 main application class. * * This is the main class of an app that presents a simulation of the model * created by economist Thomas Schelling to help explain self-segregation. * * @author lewis63 * @version 2019.11.12 */ public class SchellingSim extends Application { private SimGrid simGrid; private int round; private Text roundText; private Text satisfiedText; /** * Presents the simulation window with buttons to run and reset the * simulation. * * @param primaryStage the main application window */ public void start(Stage primaryStage) { Button stepButton = new Button("Step"); stepButton.setOnAction(this::handleStep); Button runButton = new Button("Run"); runButton.setOnAction(this::handleRun); Button resetButton = new Button("Reset"); resetButton.setOnAction(this::handleReset); FlowPane buttons = new FlowPane(stepButton, runButton, resetButton); buttons.setAlignment(Pos.TOP_CENTER); buttons.setPadding(new Insets(20, 0, 0, 0)); buttons.setHgap(20); simGrid = new SimGrid(30, 30); round = 0; roundText = new Text(); satisfiedText = new Text(); updateRoundData(); FlowPane roundData = new FlowPane(roundText, satisfiedText); roundData.setAlignment(Pos.TOP_CENTER); roundData.setHgap(20); VBox root = new VBox(buttons, roundData, simGrid); root.setSpacing(20); Scene scene = new Scene(root, 550, 600); primaryStage.setTitle("Schelling Self-Segregation Simulator"); primaryStage.setScene(scene); primaryStage.show(); } /** * Handles the user pressing the Step button by performing one step of * the simulation and updating the display. * @param event the event representing the button being pushed */ public void handleStep(ActionEvent event) { if (simGrid.getSatisfiedPercent() < 100) { simGrid.performSimulationStep(); round++; updateRoundData(); } } /** * Handles the user pressing the Run button by repeatedly performing steps * of the simulation until all agents are satisfied. * @param event the event representing the button being pushed */ public void handleRun(ActionEvent event) { while (simGrid.getSatisfiedPercent() < 100) { simGrid.performSimulationStep(); round++; updateRoundData(); } } /** * Resets the simulation to an initial random state. * @param event the event representing the button being pushed */ public void handleReset(ActionEvent event) { simGrid.resetGrid(); round = 0; updateRoundData(); } /** * Updates the round and satisfaction data displayed in the simulation * window. */ private void updateRoundData() { roundText.setText("Round: " + round); satisfiedText.setText("Satisfied: " + String.format("%.1f %%", simGrid.getSatisfiedPercent())); } }