我尝试添加一个方法，如果用鼠标左键单击单元格，它会激活，但我不知道如何。我尝试添加MouseClickListener，但无法将其连接到我的代码。我是JavaFx的新手，所以很难概述所有功能以及如何使用它们。到目前为止，我的代码的所有其他功能都运行良好。我希望你们中的任何人都知道如何实现这种方法。这是我的代码：
import com.google.gson.reflect.TypeToken;
import javafx.application.Application;
import javafx.animation.AnimationTimer;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.control.Button;
import javafx.scene.input.MouseButton;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
import java.awt.event.MouseEvent;
import java.io.IOException;
import java.util.Random;
import java.util.concurrent.TimeUnit;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import com.google.gson.Gson;
import javax.swing.*;
public class conway extends Application {
private static final int width = 500;
private static final int height = 500;
private static final int cellsize = 10;
private static Gson gson = new Gson();
private static class Life{
private final int reihe;
private final int zeile;
private Boolean[][] rules;
private int[][] grid;
private Random random=new Random();
private final GraphicsContext graphics;
public Life(int reihe, int zeile, GraphicsContext graphics){
this.reihe =reihe;
this.zeile =zeile;
this.graphics=graphics;
grid=new int[reihe][zeile];
this.rules = new Boolean[][]{{false, false, false, true, false, false, false, false, false, false},
{false, false, true, true, false, false, false, false, false, false}};
}
public void init(){
for(int i = 0; i< reihe; i++){
for(int j = 0; j< zeile; j++){
grid[i][j]=random.nextInt(2);
}
}
draw();
}
private void draw(){
graphics.setFill(Color.LAVENDER);
graphics.fillRect(0,0,width,height);
for(int i=0; i<grid.length;i++){
for(int j=0; j<grid[i].length; j++){
if(grid[i][j]==1){
graphics.setFill(Color.gray(0.5,0.5));
graphics.fillRect(i*cellsize, j*cellsize,cellsize,cellsize);
graphics.setFill(Color.PURPLE);
graphics.fillRect((i*cellsize)+1, (j*cellsize)+1, cellsize-2, cellsize-2);
}
else{
graphics.setFill(Color.gray(0.5,0.5));
graphics.fillRect(i*cellsize,j*cellsize,cellsize, cellsize);
graphics.setFill(Color.WHITE);
graphics.fillRect((i*cellsize)+1,(j*cellsize)+1,cellsize-2,cellsize-2);
}
}
}
}
private int countNeighbors(int i, int j){
int sum=0;
int iStart=i==0?0:-1;
int iEnd=i==grid.length - 1 ? 0:1;
int jStart=j==0?0:-1;
int jEnd=j==grid[0].length - 1 ? 0:1;
for (int k=iStart; k<=iEnd;k++){
for(int l=jStart;l<=jEnd;l++){
sum+=grid[i+k][l+j];
}
}
sum-=grid[i][j];
return sum;
}
public void tick(){
int[][] next=new int[reihe][zeile];
for(int i = 0; i< reihe; i++){
for(int j = 0; j< zeile; j++){
int nachbar= countNeighbors(i,j);
if(rules[grid[i][j]][nachbar] == true){
next[i][j] = 1;
}
}
}
grid=next;
draw();
}
public void safe() throws IOException {
JsonArray to_safe = new JsonArray();
Path pfad = Paths.get("C:\Users\Frodo\IdeaProjects\gameoflife\only_safe_file_for_now.json");
if(Files.exists(pfad) == false) {
Files.createFile(pfad);
}
for(int i = 0; i<grid.length; i++){
JsonArray helper = new JsonArray();
for (int j = 0; j<grid[0].length; j++){
helper.add(grid[i][j]);
}
to_safe.add(helper);
}
Files.writeString(pfad, gson.toJson(to_safe));
}
public void load() throws IOException{
int saved_grid[][];
Path pfad = Paths.get("C:\Users\Frodo\IdeaProjects\gameoflife\only_safe_file_for_now.json");
if(Files.exists(pfad) == false) {
return;
}
else {
String array_string = Files.readString(pfad);
saved_grid = gson.fromJson(array_string, new TypeToken<int[][]>(){}.getType());
if (saved_grid.length == 0) {
return;
}
}
grid = saved_grid;
draw();
}
}
public static void main(String[] args) {
launch();
}
public void start(Stage primaryStage) {
VBox root = new VBox(10);
Scene scene = new Scene(root, width, height + 100);
final Canvas canvas = new Canvas(width, height);
final boolean[] leftclick = new boolean[1];
leftclick[0] =false;
scene.setOnMouseClicked(e->{
if(e.getButton().equals(MouseButton.PRIMARY)){
if(leftclick[0]){
leftclick[0] =false;
}
else leftclick[0] =true;
}
});
Button reset = new Button("Reset");
Button step = new Button("Step");
Button run = new Button("Run");
Button stop = new Button("Stop");
Button safe_state = new Button("Safe");
Button load_button = new Button("Load");
Button terminate = new Button("Terminate");
root.getChildren().addAll(canvas, new HBox(10, reset, step, run, stop, safe_state, load_button, terminate));
primaryStage.setScene(scene);
primaryStage.show();
int rows = (int) Math.floor(height / cellsize);
int cols = (int) Math.floor(width / cellsize);
GraphicsContext graphics = canvas.getGraphicsContext2D();
Life life = new Life(rows, cols, graphics);
life.init();
AnimationTimer Animation = new AnimationTimer() {
private long lastUpdate=0;
@Override
public void handle(long now) {
if ((now - lastUpdate) >= TimeUnit.MILLISECONDS.toNanos(100)) {
life.tick();
lastUpdate = now;
}
}
};
reset.setOnAction(l -> life.init());
run.setOnAction(l -> Animation.start());
step.setOnAction(l -> life.tick());
stop.setOnAction(l -> Animation.stop());
safe_state.setOnAction(l-> {
try {
life.safe();
} catch (IOException e) {
e.printStackTrace();
}
});
load_button.setOnAction(l -> {
try {
life.load();
} catch (IOException e) {
e.printStackTrace();
}
});
terminate.setOnAction(l -> {
Stage stage = (Stage) terminate.getScene().getWindow();
stage.close();
});
}
}
这个方向的东西应该可以解决问题：
canvas.addEventHandler(MouseEvent.MOUSE_CLICKED,
new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent t) {
// is left click
if (t == MouseEvent.BUTTON1) {
grid[rows][cols] = 1;
draw();
}
}
});