您可以使用AnchorPane 来包装TextField 和Button,并将锚点设置为使TextField 填充整个AnchorPane,并将Button 锚定在右侧-一边。
示例:
<AnchorPane prefHeight="24.0" prefWidth="322.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<children>
<TextField prefWidth="200.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0" />
<Button graphicTextGap="0.0" minHeight="10.0" minWidth="13.0" mnemonicParsing="false" prefHeight="20.0" prefWidth="22.0" style="-fx-background-color: #7085FF; -fx-background-radius: 30; -fx-background-insets: 0;" text="x" textFill="WHITE" AnchorPane.bottomAnchor="4.0" AnchorPane.rightAnchor="4.0" AnchorPane.topAnchor="4.0">
<font>
<Font size="9.0" />
</font>
</Button>
</children>
</AnchorPane>
输出如下:
如果您不止一次需要它(而且很可能您会),最好将它单独放在另一个 FXML 文件中,并带有相应的控制器类,该控制器类也处理 Button 的操作。
分离的 FXML 示例:
ButtonedTextField.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.text.*?>
<?import javafx.scene.text.Font?>
<AnchorPane xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="application.ButtonedTextField">
<children>
<TextField fx:id="textField" prefWidth="200.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0" />
<Button fx:id="button" graphicTextGap="0.0" minHeight="10.0" minWidth="13.0" mnemonicParsing="false" prefHeight="20.0" prefWidth="22.0" style="-fx-background-color: #7085FF; -fx-background-radius: 30; -fx-background-insets: 0;" text="x" textFill="WHITE" AnchorPane.bottomAnchor="4.0" AnchorPane.rightAnchor="4.0" AnchorPane.topAnchor="4.0">
<font>
<Font size="9.0" />
</font>
</Button>
</children>
</AnchorPane>
ButtonedTextField.java(控制器)
public class ButtonedTextField implements Initializable {
public @FXML TextField textField;
private @FXML Button button;
@Override
public void initialize(URL location, ResourceBundle resources) {
button.setOnAction(e -> textField.setText(""));
}
}
然后您可以将此控件包含到另一个 FXML:
ButtonedTextFieldTest.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.control.TabPane?>
<?import javafx.scene.layout.*?>
<TabPane xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/2.2" fx:controller="application.ButtonedTextFieldTest">
<tabs>
<Tab text="Untitled Tab">
<content>
<AnchorPane id="Content" minHeight="0.0" minWidth="0.0" prefHeight="180.0" prefWidth="200.0">
<children>
<fx:include fx:id="buttonedTextField" source="ButtonedTextField.fxml" prefWidth="200.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="2.0" />
</children>
</AnchorPane>
</content>
</Tab>
</tabs>
</TabPane>
ButtonedTextFieldTest.java(包含 FXML 的控制器)
public class ButtonedTextFieldTest implements Initializable {
private @FXML AnchorPane buttonedTextField;
private @FXML ButtonedTextField buttonedTextFieldController;
@Override
public void initialize(URL location, ResourceBundle resources) {
buttonedTextFieldController.textField.textProperty().addListener((ov, oldVal, newVal) -> {
System.out.println(newVal);
});
}
}
注意事项:
- 您可以随意自定义
Button(也许设置图形更容易)
- 可以进一步自定义位置和样式。
- 正如您在上一课中看到的,控件本身及其控制器也可以被注入!约定注入控制器是在被感染控件的 ID 后使用“控制器”后缀。