package fx.com;
import javafx.application.Application;
import javafx.application.ConditionalFeature;
import javafx.application.HostServices;
import javafx.application.Platform;
import javafx.collections.ListChangeListener;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.JavaFXBuilderFactory;
import javafx.geometry.Rectangle2D;
import javafx.scene.Cursor;
import javafx.scene.Group;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.image.Image;
import javafx.stage.Screen;
import javafx.stage.Stage;
import sun.net.www.content.image.png;
import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
public class Main extends Application {
public static void main(String[] args) {
launch(Main.class,args);
}
@Override
public void start(Stage primaryStage) throws IOException, InterruptedException {
Button button1 = new Button("b1");
Button button2 = new Button("b2");
Button button3 = new Button("b3");
button1.setLayoutX(0);
button1.setLayoutY(0);
button2.setLayoutX(50);
button2.setLayoutY(0);
button3.setLayoutX(100);
button3.setLayoutY(0);
Group group = new Group();
//添加组件到 group
group.getChildren().addAll(button1,button2,button3);
//移除一个组件
// group.getChildren().remove(button1);
//设置group的透明度 影响 改组里面的所有组件
group.setOpacity(0.5);
//检测某坐标有没有组件 表示组件的左上角的位置(50,0)
boolean contains = group.contains(50, 0);
//获取组里面的所有 组件
Object[] objects = group.getChildren().toArray();
for (int i = 0; i < objects.length; i++) {
Button button = (Button)objects[i];
button.setPrefWidth(50);
}
System.out.println(objects.length);
//监听 group 里面的元素 修改的时候
group.getChildren().addListener(new ListChangeListener<Node>() {
@Override
public void onChanged(Change<? extends Node> c) {
int size = c.getList().size();
System.out.println("组件数量:"+size);
}
});
//给button1 添加一个点击事件
button1.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent event) {
Button button = new Button("b4");
button.setLayoutX(150);
group.getChildren().add(button);
}
});
Scene scene = new Scene(group);
primaryStage.setScene(scene);
URL qunlogoUrl = new URL("http://www.haotuo.net.cn/Resources/cq/qunlogo.png");
primaryStage.setWidth(300);
primaryStage.setHeight(300);
primaryStage.getIcons().add(new Image(qunlogoUrl.toExternalForm()));
primaryStage.setTitle("JavaFX");
primaryStage.show();
}
}