java JavaFX：将子项添加到 ScrollPane
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JavaFX: Add children to ScrollPane
提问by Alex
I have a Pane Object where users can drag and drop various ImageViews. For this, I used
pane.getChildren(imageViewObject)method
我有一个窗格对象，用户可以在其中拖放各种 ImageView。为此，我使用了
pane.getChildren(imageViewObject)方法
Now, after replacing Pane with ScrollPane, it does not have this method. So I don't know how to get arrount this issue.
现在用ScrollPane替换Pane后，就没有这个方法了。所以我不知道如何解决这个问题。
Thank you in advance
先感谢您
回答by Kachna
you can specify only one node with ScrollPane. To create a scroll view with more than one component, use layout containers or the Group class.
您只能使用 指定一个节点ScrollPane。要创建具有多个组件的滚动视图，请使用布局容器或 Group 类。
Pane pane = ...;
ScrollPane sp = new ScrollPane();
sp.setContent(pane);
Example:
示例：
import javafx.application.Application;
import static javafx.application.Application.launch;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ScrollPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
/**
*
* @author kachna
*/
public class Test extends Application {
@Override
public void start(Stage stage) throws Exception {
VBox root = new VBox();
root.getChildren().addAll(new Button("button1"), new Button("button2"), new Button("button3"));
root.setSpacing(10);
root.setPadding(new Insets(10));
ScrollPane sp = new ScrollPane();
sp.setContent(root);
sp.setPannable(true); // it means that the user should be able to pan the viewport by using the mouse.
Scene scene = new Scene(sp, 100, 100);
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}
