我想实现这个例子:http ://docs.oracle.com/javafx/2/ui_controls/toggle-button.htm#
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Toggle;
import javafx.scene.control.ToggleButton;
import javafx.scene.control.ToggleGroup;
import javafx.scene.layout.HBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
public class test extends Application
{
private void init(Stage primaryStage)
{
Group root = new Group();
primaryStage.setScene(new Scene(root));
String pillButtonCss = DX57DC.class.getResource("PillButton.css").toExternalForm();
// create 3 toggle buttons and a toogle group for them
ToggleButton tb1 = new ToggleButton("Left Button");
tb1.setId("pill-left");
ToggleButton tb2 = new ToggleButton("Center Button");
tb2.setId("pill-center");
ToggleButton tb3 = new ToggleButton("Right Button");
tb3.setId("pill-right");
final ToggleGroup group = new ToggleGroup();
tb1.setToggleGroup(group);
tb2.setToggleGroup(group);
tb3.setToggleGroup(group);
// select the first button to start with
group.selectToggle(tb1);
//////////////////////////////////////////
tb1.setUserData(Color.LIGHTGREEN);
tb2.setUserData(Color.LIGHTBLUE);
tb3.setUserData(Color.SALMON);
final Rectangle rect = new Rectangle(300, 300);
group.selectedToggleProperty().addListener(new ChangeListener<Toggle>()
{
@Override
public void changed(ObservableValue<? extends Toggle> ov,
Toggle toggle, Toggle new_toggle)
{
if (new_toggle == null)
{
rect.setFill(Color.WHITE);
}
else
{
rect.setFill(
(Color) group.getSelectedToggle().getUserData());
}
}
});
///////////////////////////////////////////
rect.setArcHeight(10);
rect.setArcWidth(10);
HBox hBox = new HBox();
hBox.getChildren().addAll(tb1, tb2, tb3);
hBox.setPadding(new Insets(20, 20, 260, 20));
hBox.getStylesheets().add(pillButtonCss);
VBox vbox = new VBox();
vbox.getChildren().add(hBox);
vbox.getChildren().add(rect);
root.getChildren().add(vbox);
}
@Override
public void start(Stage primaryStage) throws Exception
{
init(primaryStage);
primaryStage.show();
}
public static void main(String[] args)
{
launch(args);
}
}
但是由于某种原因,我可以看到按钮,但是当我尝试切换按钮时,矩形没有显示。你能帮我找出我的错误在哪里吗?还有我如何用几个包含不同内容的矩形来实现这个例子?