如何使FXML生成的按钮工作

Question

<?import javafx.scene.effect.*?>
<?import javafx.scene.text.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>

<SplitPane dividerPositions="0.3996655518394649" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="470.0" xmlns="http://javafx.com/javafx/8.0.40" xmlns:fx="http://javafx.com/fxml/1">
  <items>
    <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="398.0" prefWidth="145.0">
         <children>
            <TableView layoutY="33.0" prefHeight="323.0" prefWidth="180.0" AnchorPane.bottomAnchor="42.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="33.0">
              <columns>
                <TableColumn prefWidth="77.0" text="Event" />
                <TableColumn prefWidth="101.0" text="Suggested time" />
              </columns>
               <columnResizePolicy>
                  <TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
               </columnResizePolicy>
               <effect>
                  <Blend />
               </effect>
            </TableView>
            <Label layoutY="6.0" prefHeight="27.0" prefWidth="90.0" text="Event view">
               <font>
                  <Font size="18.0" />
               </font>
            </Label>
            <Button layoutY="368.0" mnemonicParsing="false" prefHeight="0.0" prefWidth="34.0" text="+">
               <font>
                  <Font name="System Bold" size="14.0" />
               </font>
            </Button>
         </children></AnchorPane>
    <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="398.0" prefWidth="267.0">
         <children>
            <Label layoutY="7.0" prefHeight="27.0" prefWidth="90.0" text="Detail view">
               <font>
                  <Font size="18.0" />
               </font>
            </Label>
            <GridPane layoutX="14.0" layoutY="34.0" prefHeight="120.0" prefWidth="258.0">
              <columnConstraints>
                <ColumnConstraints hgrow="SOMETIMES" maxWidth="124.0" minWidth="10.0" prefWidth="87.0" />
                <ColumnConstraints hgrow="SOMETIMES" maxWidth="176.0" minWidth="10.0" prefWidth="171.0" />
              </columnConstraints>
              <rowConstraints>
                <RowConstraints maxHeight="30.0" minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
                <RowConstraints maxHeight="75.0" minHeight="10.0" prefHeight="59.0" vgrow="SOMETIMES" />
                <RowConstraints maxHeight="60.0" minHeight="10.0" prefHeight="31.0" vgrow="SOMETIMES" />
                  <RowConstraints maxHeight="25.0" minHeight="0.0" prefHeight="0.0" vgrow="SOMETIMES" />
              </rowConstraints>
               <children>
                  <Label text="Name" />
                  <Label text="Details" GridPane.rowIndex="1" />
                  <Label text="Estimated time" GridPane.rowIndex="2" />
                  <TextField promptText="Enter name" GridPane.columnIndex="1" />
                  <TextField promptText="Enter estimated time" GridPane.columnIndex="1" GridPane.rowIndex="2" />
                  <TextArea prefHeight="200.0" prefWidth="200.0" promptText="Enter details" GridPane.columnIndex="1" GridPane.rowIndex="1" />
               </children>
            </GridPane>
            <Button layoutX="219.0" layoutY="372.0" mnemonicParsing="false" text="Done" />
            <Button layoutX="152.0" layoutY="372.0" mnemonicParsing="false" text="Cancel" />
         </children></AnchorPane>
  </items>
</SplitPane>

编辑：为了澄清，我有一个FXML文件、一个控制器类和一个构造函数类。我需要连接到我的控制器类。

Answer 1

定义了controller类之后，就可以将FXML文件链接到它。在SceneBuilder中，展开左下方的“controller”标题窗格，并键入controller类的完全限定名。

若要为按钮指定处理程序方法，请选择该按钮，然后展开“代码”标题窗格（右面板的底部窗格）。例如，您可以在“On action”字段中添加操作处理程序的方法名。

如果在没有SceneBuilder的情况下执行此操作，则可以将属性fx:controller=“...”添加到FXML的根元素中，指定完全限定的类名。对于按钮，可以将onaction=“#methodname”添加到 元素中，指定按下按钮时要执行的方法的名称。该方法应该采用ActionEvent类型的单个参数，或者不采用任何参数。