[英]Is it possible to create an array of Controllers in JavaFX?
我进行了很好的搜索,或者我使用的术语不正确,或者这个问题尚未出现。 我从事Java编程已经有几年了,最近几周我才开始使用Java FX。
我正在尝试创建一个实际上是一个测验的应用程序,但我不想让每个问题并排出现,而没有为每个问题创建一个新的窗格/选项卡。
我已经为单个问题创建了一个questionController,但是我不确定创建许多由fx:id唯一标识的questionController的最佳方法。
我希望我的GUI可扩展,以便用户可以选择每轮显示的问题数。 如果没有手动设置使用不同数量的QuestionControllers创建视图,我似乎无法解决该问题。
但这无法缩放,因为我的按钮只是变成button0-buttonN
如果您需要更多信息,请告诉我。
public class QuestionController implements Initializable {
@FXML
private ComboBox<String> chordCombo;
@FXML
private Label questionField;
@FXML
private Button submitButton;
@FXML
private ToggleGroup answerGroup;
@FXML
private RadioButton toggle0, toggle1, toggle2, toggle3, toggle4;
@Override
public void initialize(URL fxmlFileLocation, ResourceBundle resources) {
submitButton.setOnAction((event) -> {
System.out.println("Submit Logic");
});
answerGroup.selectedToggleProperty().addListener(new ChangeListener<Toggle>() {
public void changed(ObservableValue<? extends Toggle> ov, Toggle old_toggle, Toggle new_toggle) {
if (answerGroup.getSelectedToggle() != null) {
System.out.println(answerGroup.getSelectedToggle().toString());
}
}
});
}
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="235.0" prefWidth="203.0" styleClass="layout" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="uk.co.temp.QuestionController">
<children>
<BorderPane layoutX="-11.0" layoutY="35.0" prefHeight="235.0" prefWidth="203.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<bottom>
<Button fx:id="submitButton" mnemonicParsing="false" text="Submit" BorderPane.alignment="CENTER">
<padding>
<Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
</padding>
<BorderPane.margin>
<Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
</BorderPane.margin>
</Button>
</bottom>
<top>
<Label fx:id="questionField" text="Insert Question Here" BorderPane.alignment="CENTER">
<padding>
<Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
</padding>
<BorderPane.margin>
<Insets left="10.0" right="10.0" top="10.0" />
</BorderPane.margin>
</Label>
</top>
<center>
<GridPane BorderPane.alignment="CENTER">
<columnConstraints>
<ColumnConstraints halignment="CENTER" hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<RadioButton fx:id="toggle0" mnemonicParsing="false" text="Answer A">
<toggleGroup>
<ToggleGroup fx:id="answerGroup" />
</toggleGroup></RadioButton>
<RadioButton fx:id="toggle1" mnemonicParsing="false" text="Answer B" toggleGroup="$answerGroup" GridPane.rowIndex="1" />
<RadioButton fx:id="toggle2" mnemonicParsing="false" text="Answer C" toggleGroup="$answerGroup" GridPane.rowIndex="2" />
<RadioButton fx:id="toggle3" mnemonicParsing="false" text="Answer D" toggleGroup="$answerGroup" GridPane.rowIndex="3" />
<RadioButton fx:id="toggle4" mnemonicParsing="false" text="Answer E" toggleGroup="$answerGroup" GridPane.rowIndex="4" />
</children>
<padding>
<Insets top="10.0" />
</padding>
</GridPane>
</center>
</BorderPane>
</children>
</AnchorPane>
我认为您正在寻找这样的东西:
TilePane pane = new TilePane(); // or whatever you are putting the questions in...
int numQuestions = ... ;
QuestionController[] controllers = new QuestionController[numQuestions];
for (int questionNumber = 0 ; questionNumber < numQuestions ; questionNumber++) {
FXMLLoader loader = new FXMLLoader(getClass().getResource("path/to/QuestionController.fxml"));
pane.getChildren().add(loader.load());
controllers[questionNumber] = loader.getController();
}
显然,如果TilePane
(或任何其他方式)在另一个FXML文件中定义并注入到另一个控制器中,则可以根据需要在该控制器中将相同的代码放入事件处理程序或初始化方法中。
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