如何使用Jython填充JavaFX TableView？

Question

FXML：

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.ScrollPane?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Font?>

<BorderPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="335.0" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1" stylesheets="@style.css">
    <center>
        <VBox BorderPane.alignment="CENTER">
            <children>
                <ScrollPane>
                    <content>
                        <VBox>
                            <children>
                                <TableView fx:id="tblProduct" prefHeight="270.0" prefWidth="335.0">
                                    <columns>
                                        <TableColumn fx:id="colProductAmount" prefWidth="64.0" text="Amount" />
                                        <TableColumn fx:id="colProductId" prefWidth="64.0" text="ID" />
                                        <TableColumn fx:id="colProductDescription" prefWidth="192.0" text="Description" />
                                    </columns>
                                    <padding>
                                        <Insets bottom="5.0" left="5.0" right="5.0" top="5.0" />
                                    </padding>
                                </TableView>
                            </children>
                        </VBox>
                    </content>
                </ScrollPane>
            </children>
        </VBox>
    </center>
</BorderPane>

控制器：

from javafxjython import (EventHandler, FXMLLoader)
from javafx.scene import Scene
from javafx.scene.layout import BorderPane
from javafx.beans.property import (SimpleIntegerProperty, SimpleStringProperty)

from javafx.collections import (FXCollections, ObservableList)
from javafx.scene.control.cell import PropertyValueFactory

from javafx.fxml import Initializable


class ProductReport():
    def __init__(self, amount, id, description):
        self.amount = SimpleIntegerProperty(amount)
        self.id = SimpleIntegerProperty(id)
        self.description = SimpleStringProperty(description)

    def getAmount(self):
        return self.amount.get()

    def setAmount(self, value):
        self.amount = SimpleIntegerProperty(value)

    def amountProperty(self):
        return self.amount

    def getId(self):
        return self.id.get()

    def setId(self, value):
        self.id = SimpleIntegerProperty(value)

    def idProperty(self):
        return self.id

    def getDescription(self):
        return self.description.get()

    def setDescription(self, value):
        self.description = SimpleStringProperty(value)

    def amountDescription(self):
        return self.description


class ProductController(FXMLLoader, BorderPane, Initializable):
    # second class must, be the same as root in FXML file
    def __init__(self):
        super(ProductController, self).__init__("view/product.fxml")  # FXML file to load
        self.colProductAmount.setCellValueFactory(PropertyValueFactory("amount"))
        self.colProductId.setCellValueFactory(PropertyValueFactory("id"))
        self.colProductDescription.setCellValueFactory(PropertyValueFactory("description"))
        data = FXCollections.observableArrayList()
        data.add(ProductReport(1, 33, "A"))
        data.add(ProductReport(1, 66, "B"))
        data.add(ProductReport(1, 99, "C"))
        self.tblProduct.setItems(data)

    def initialize(self, location, resources):
        pass

主类：

from javafxjython import (Application, EventHandler, FXMLLoader)
from javafx.scene import Scene
from controllers  import ProductController

class Main(Application):
def __init__(self):
    self.title = "JavaFX Test"

def start(self, stage):
    stage.setTitle(self.title)
    stage.setScene(Scene(ProductController(stage), 335, 400))
    stage.show()


if __name__ == "__main__":
Application.launch(Main)

唯一的问题是：产品列表未显示在表格上。

该表进行渲染，就像它有要显示的数据，但什么也没有显示。

有人知道哪里出了错吗？

请帮帮我。

PS：我正在使用来自GitHub（https://github.com/f-lima/javafx-jython）的javafxjython库项目将FXML内部的所有组件加载并创建到我的控制器类中。