java 如何在 JavaFX 中将按钮对齐到右下角？
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How to align a button into the bottom right corner in JavaFX?
提问by twilco
I'm extremely new to JavaFX, and I'm attempting to get a button(specifically scrapeBtn) into the bottom right corner of an application. Here is what I have so far:
我对 JavaFX 非常陌生，我正在尝试将按钮（特别是scrapeBtn）放入应用程序的右下角。这是我到目前为止所拥有的：
package main;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TextField;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class Driver extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
Button scrapeBtn = new Button();
scrapeBtn.setText("Scrape!");
scrapeBtn.setOnAction(new EventHandler<ActionEvent>() {
public void handle(ActionEvent event) {
System.out.println("Scrape button pressed.");
}
});
TextField console = new TextField();
GridPane root = new GridPane();
GridPane.setConstraints(scrapeBtn, 2, 2, 1, 1);
root.getChildren().add(scrapeBtn);
root.getChildren().add(console);
Scene scene = new Scene(root, 600, 400);
primaryStage.setTitle("Wiki Scraper");
primaryStage.setScene(scene);
primaryStage.show();
}
}
Any ideas as to how I could accomplish this? Some tips in general to aligning and formatting things with JavaFX would also be really appreciated.
关于我如何做到这一点的任何想法？一些使用 JavaFX 对齐和格式化事物的一般提示也将非常感激。
Thanks.
谢谢。
回答by gfkri
I often use a BorderPanefor similar purposes (e.g. a Dialog with some text and controls etc. at the center and one or more buttons at the bottom). Therefore, I use the BorderPaneas root and a HBoxas "button container" at the bottom. Finally, I set the botton alignment to "RIGHT".
我经常将 aBorderPane用于类似的目的（例如，在中心带有一些文本和控件等，在底部带有一个或多个按钮的对话框）。因此，我在底部使用BorderPaneas root 和 aHBox作为“按钮容器”。最后，我将底部对齐设置为“RIGHT”。
Here an example based on your code:
这是基于您的代码的示例：
@Override
public void start(Stage primaryStage) {
// center
VBox vbCenter = new VBox(); // use any container as center pane e.g. VBox
TextField console = new TextField();
vbCenter.getChildren().add(console);
// bottom respectively "button area"
HBox hbButtons = new HBox();
Button scrapeBtn = new Button();
scrapeBtn.setText("Scrape!");
scrapeBtn.setOnAction(new EventHandler<ActionEvent>() {
public void handle(ActionEvent event) {
System.out.println("Scrape button pressed.");
}
});
hbButtons.getChildren().add(scrapeBtn);
hbButtons.setAlignment(Pos.CENTER_RIGHT);
// root
BorderPane root = new BorderPane();
root.setPadding(new Insets(20)); // space between elements and window border
root.setCenter(vbCenter);
root.setBottom(hbButtons);
Scene scene = new Scene(root, 600, 400);
primaryStage.setTitle("Wiki Scraper");
primaryStage.setScene(scene);
primaryStage.show();
}
This code leads to this (after resizing the window a little bit):
此代码导致此（在稍微调整窗口大小后）：
回答by lelelo
You can use two BorderPanes to place a control bottom right
您可以使用两个 BorderPanes 在右下角放置一个控件
@Override
public void start(Stage primaryStage) throws Exception {
BorderPane root = new BorderPane();
BorderPane bottom = new BorderPane();
bottom.setRight(new Button("I am placed bottom right"));
root.setBottom(bottom);
Scene scene = new Scene(root);
primaryStage.setScene(scene);
primaryStage.setWidth(400);
primaryStage.setHeight(400);
primaryStage.show();
}
