ボタン、マウス - 経済統計練習帳

package img;
 
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.scene.image.Image;
import java.io.File;
import static javafx.application.Application.launch;
import javafx.scene.image.ImageView;
 import javafx.scene.Group;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.paint.Color;
 
import javafx.scene.input.MouseEvent;
 
public class pro extends Application {
 
  GraphicsContext gc;    
  int h=800;
  int w=800;
int[][] memor=new int[h][w]; 
int[][] memog=new int[h][w]; 
int[][] memob=new int[h][w];  
int number;
int[] sampler=new int[100]; 
int[] sampleg=new int[100]; 
int[] sampleb=new int[100];
int[] pointx=new int[100]; 
int[] pointy=new int[100];
 
 
    public static void main(String[] args) {
        launch(args);
    }
 
 
 
    @Override
    public void start(Stage primaryStage) {
 
 
 
 
        faststep sub2=new faststep();
      sub2.makedata("data.png");
      w=sub2.w;
      h=sub2.h;
 
 
 
 
 
 
 
        catchimg sub=new catchimg();
        sub.w=w;
        sub.h=h;
        sub.makedata("data.png");
        memor=sub.memor;
memog=sub.memog;
memob=sub.memob;
 
 
Canvas canvas = new Canvas(500, 500);
gc = canvas.getGraphicsContext2D();
canvas.setLayoutX(50);
canvas.setLayoutY(50);
 
int mx,nx;
 
 
 
for(mx=0;mx<h;mx++){
for(nx=0;nx<w;nx++){
gc.setFill(Color.rgb(memor[mx][nx],memog[mx][nx],memob[mx][nx]));
gc.fillRect(nx,mx,1,1);
}}
 
 
Button btn = new Button("計算");
btn.setLayoutX(300);
btn.setLayoutY(600);
 
 
        btn.setOnAction(new EventHandler<ActionEvent>() {
 
            @Override
            public void handle(ActionEvent event) {
 
                System.out.println("hello");
 
            }
        });
 
canvas.addEventHandler(MouseEvent.MOUSE_CLICKED, 
       new EventHandler<MouseEvent>() {
           @Override
           public void handle(MouseEvent e) {
 
               int x1,y1;
 
               int px=(int)e.getX();
               int py=(int)e.getY();
 gc.setFill(Color.RED);
gc.fillRect(px,py,10,10);
 
 
}
       });
 
 
 
 
 
Group root = new Group();
Scene scene = new Scene(root, 700, 700);    
root.getChildren().add(canvas);
 root.getChildren().add(btn);
 
 
 
        primaryStage.setTitle("写真");
        primaryStage.setScene(scene);
        primaryStage.show();
    }
 
 
}