动态地向选定的javafx ComboBoxTableCell添加值 [英] Adding values to selected javafx ComboBoxTableCell dynamically

问题描述

我有一个 TableView ，其中有两列名为Product和Brand。产品可以是不同的品牌。例如。电视有不同的品牌，如三星，索尼等。我在ComboBoxes展示产品品牌。

I have a TableView with two columns named Product and Brand. A Product can be of different Brands. Eg. TV has different brands like Samsung, Sony etc. I am showing Brands of a Product in ComboBoxes.

这就是我为我的品牌栏添加 ComboBoxTableCell 的方法。

This is how i am adding a ComboBoxTableCell for my Brand Column.

    ObservableList<String> catList = FXCollections.observableArrayList();

    categoryCol.setCellFactory(t -> {   
        ComboBoxTableCell comboCell = new ComboBoxTableCell(catList);
        return comboCell;
    });
    contactTable.getColumns().add(categoryCol);

现在在这些组合框中我想添加品牌值。由于会有不同的产品，所以他们的品牌也会有所不同。例如。

Now in these ComboBoxes i want to add values of Brands. Since There will be different Products so their Brands will be different also. Eg.

Product  |  Model
----------------------------------------------
TV       |  ComboBox[Samsung, Sony, Panasonic] 
Monitor  |  ComboBox[Dell, Microsoft, Apple ]

既然ComboBox拥有相同的数据模型（ObservableList）怎么能我通过选择表中的项目为它们添加不同的值。有可能吗？在此先感谢您的帮助。

Now since the ComboBoxes have same data model (ObservableList) how can i add different values to them by selecting the items in table. Is it possible to do ? Thanks in advance for any help.

推荐答案

首先，您需要一个自定义行类来存储元素，
然后你必须 @Override 来自 ComboBoxTreeTableCell startEdit（） c $ c>例如这样：

First of all you need a custom row class in which you store the elements, then you have to @Override the startEdit() from theComboBoxTreeTableCell for example this way :

@Override public void startEdit() {
    MyCustomRow currentRow = getTableRow().getItem();
    getItems().setAll(currentRow.getModels());
        super.startEdit();
    }
}

MyCustomRow：

MyCustomRow:

package mypackage;

import javafx.beans.property.SimpleStringProperty;

import java.util.List;
import java.util.Map;

public class MyCustomRow {

    private SimpleStringProperty product;

    private SimpleStringProperty model;

    private List<String> allModels;

    public MyCustomRow(
            String product,
            String model,
            List<String> models) {
        this.product = new SimpleStringProperty(product);
        this.model = new SimpleStringProperty(product);
        this.allModels = models;
   }

    public String getProduct() {
        return product.get();
    }

    public SimpleStringProperty productProperty() {
        return product;
    }

    public String getModel() {
        return model.get();
    }

    public SimpleStringProperty modelProperty() {
        return model;
    }

    public List<String> getModels() {
        return allModels;
    }
}

然后在你的控制器类中你可以说：

Then in your contoller class you can say:

ObservableList<String> carList = FXCollections.observableArrayList();

    categoryCol.setCellFactory(t -> new ComboBoxTableCell(carList){
         @Override public void startEdit() {
            MyCustomRow currentRow = getTableRow().getItem();
            getItems().setAll(currentRow.getModels());
            super.startEdit();
        }
    });
    categoryCol.setCellValueFactory(v -> v.getValue().modelProperty());
    contactTable.getColumns().add(categoryCol);

因此每行添加适当的模型。因此，在 ComboBox 中，您将只拥有属于该产品的那些项目（模型）

So each row you add the appropriate models. So in the ComboBox you will have only those items(models) which belong to the product

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