带有FXML的JavaFx 2.0:标签在底部而不是顶部

Question

是否可以定义标签栏将标签放在底部而不是顶部?

Answer 1

使用下面的代码片段设置制表符的边距:

TabPane tabPane = new TabPane();
Tab tab1 = new Tab("Tab 1");
tab1.setContent(new Label("Tab1 content"))
tabPane.getTabs().add(tab1);
tabPane.setSide(Side.BOTTOM)

现在内容在制表符的上方。

也作为完整的FXML示例:

<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.collections.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.effect.*?>
<?import javafx.scene.image.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.paint.*?>
<?import javafx.scene.shape.*?>
<?import javafx.scene.text.*?>
<?import javafx.scene.web.*?>
<BorderPane xmlns:fx="http://javafx.com/fxml" fx:controller="example.MainViewController">
  <bottom>
    <HBox>
      <children>
        <Button fx:id="btnNewTab" mnemonicParsing="false" text="Add New Tab" onAction="#btnNewTabAction" />
      </children>
    </HBox>
  </bottom>
  <center>
    <TabPane fx:id="tabPane" side="BOTTOM">
      <tabs>
        <Tab text="Untitled Tab 1">
          <content>
            <AnchorPane id="Content">
                <Label>Content 1</Label>
            </AnchorPane>
          </content>
        </Tab>
        <Tab text="Untitled Tab 2">
          <content>
            <AnchorPane id="Content">
                <Label>Content 2</Label>
            </AnchorPane>
          </content>
        </Tab>
      </tabs>
    </TabPane>
  </center>
  <top>
    <Label text="TabPane Example" />
  </top>
</BorderPane>

主类:

package example;
import java.io.File;
import java.io.IOException;
import java.net.URL;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.fxml.JavaFXBuilderFactory;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class ExampleMain extends Application {
    /**
     * @param args
     */
    public static void main(String[] args) {
        Application.launch(ExampleMain.class, args);
    }
    @Override
    public void start(Stage primaryStage) throws Exception {
        URL location = ExampleMain.class.getResource("MainView.fxml");
        FXMLLoader fxmlLoader = new FXMLLoader();
        fxmlLoader.setLocation(location);
        fxmlLoader.setBuilderFactory(new JavaFXBuilderFactory());
        try {
            Parent root = (Parent) fxmlLoader.load(location.openStream());
            // in case you need access to the controller
            MainViewController mainViewController = fxmlLoader.getController();
            primaryStage.setScene(new Scene(root, 1024, 768));
            Scene s = primaryStage.getScene();
            s.setRoot(root);
            primaryStage.sizeToScene();
            primaryStage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

和控制器:

package example;
import javafx.fxml.FXML;
import javafx.scene.control.Label;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;
public class MainViewController {
    private static int counter = 0;
    @FXML
    private TabPane tabPane;
    @FXML
    public void btnNewTabAction() {
        Tab tab = new Tab();
        tab.setText("new Tab " + ++counter);
        tab.setContent(new Label("Content of new tab " + counter));
        tabPane.getTabs().add(tab);
    }
}

如您在示例中看到的，fxml是Java类的xml表示。如果类有一个属性端(getSide, setSide)，那么类在fxml中有一个属性端。因此，您可以阅读api文档，以找出哪些属性在fxml中也是可用的。

Answer 2

不要定义TabBar !使用适当的布局窗格，例如javafx.scene.layout.BorderPane。查找JavaFX 2.0 API和FXML的附加示例:

JAVAFX 2.0 API

package tabtest;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
public class TabTest extends Application {
    public static void main(String[] args) {
        Application.launch(args);
    }
    @Override
    public void start(Stage primaryStage) {
        BorderPane root = new BorderPane();
        Scene scene = new Scene(root, 300, 250);
        TabPane tabPane = new TabPane();
        Tab tab1 = new Tab("Tab 1");
        tabPane.getTabs().add(tab1);
        root.setBottom(tabPane);
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

更多信息请查看http://download.oracle.com/javafx/2.0/layout/jfxpub-layout.htm

FXML

package fxmltest;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class FxmlTest extends Application {
    public static void main(String[] args) {
        Application.launch(FxmlTest.class, args);
    }
    @Override
    public void start(Stage stage) throws Exception {
        Parent root = FXMLLoader.load(getClass().getResource("Sample.fxml"));
        Scene scene = new Scene(root, 300, 250);
        stage.setScene(scene);
        stage.show();
    }
}

Sample.fxml:

<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<BorderPane>
    <bottom>
        <TabPane>
            <tabs>
                <Tab text="Tab 1" />
            </tabs>
        </TabPane>
    </bottom>
</BorderPane>