JavaFX Span Tableview按MapEntries合并单元格 [英] JavaFX Span Tableview Merge Cells by MapEntries

问题描述

您好我有以下地图：

Map<String,ArrayList>

我想要这样的TableView

I would like to have a TableView like this

|--------------|-----------|
|ArrayList e1  | String e  |
|--------------|           |
|ArrayList e2  |           |
|--------------|           |
|ArrayList e3  |           |
|--------------|-----------|
|ArrayList x1  | String x  |
|--------------|           |
|ArrayList x2  |           |
|--------------|-----------|

我已经尝试了几个CellValueFactory Callbacks，但我没有任何线索如何读出我的值，并跨越或合并这些单元格。

I already tried it with several CellValueFactory Callbacks, but i don't have any clue how to read out my values and, span or merge these cells.

祝你好运

推荐答案

<我通过为第一列创建一个CellValueFactory来解决它，我将ArrayList作为String抓取，所以：

I solved it by creating a CellValueFactory for the first column where I grabbed the ArrayList as String so:

    arrayListCol.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<Map.Entry<PropertyDifference, DifferenceFileList>, String>, ObservableValue<String>>() {
        @Override
        public ObservableValue<String> call(TableColumn.CellDataFeatures<Map.Entry<PropertyDifference, DifferenceFileList>, String> p) {
            return new SimpleStringProperty(Arrays.toString(p.getValue().getValue().getFileList().toArray()));
        }
    });

结果为：

|--------------|-----------|
|[e1,e2,e3]    | String e  |
|--------------|-----------|
|[x1,x2]       | String x  |
|--------------|-----------|

这将处理列条目的值。现在我考虑了一个进一步的表示形式，并使用了一个CellFactory，然后格式化单元格。

This handles the values for the column entries. Now i thought about a further representation form and used a CellFactory for this, which afterward formats the cell.

    Callback<TableColumn<Map.Entry<PropertyDifference, DifferenceFileList>, String>, TableCell<Map.Entry<PropertyDifference, DifferenceFileList>, String>> tableCellList = new Callback<TableColumn<Map.Entry<PropertyDifference, DifferenceFileList>, String>, TableCell<Map.Entry<PropertyDifference, DifferenceFileList>, String>>() {
        @Override
        public TableCell<Map.Entry<PropertyDifference, DifferenceFileList>, String> call(TableColumn<Map.Entry<PropertyDifference, DifferenceFileList>, String> param) {
            return new TableCell<Map.Entry<PropertyDifference, DifferenceFileList>, String>() {
                @Override
                protected void updateItem(String item, boolean empty) {
                  if (item != null) {
                      item = item.replace("[", "") .replace("]", "");
                      ObservableList<String> items = FXCollections.observableArrayList(item.split(","));
                      final ListView<String> listView = new ListView<String>();

                      listView.setItems(items);

                      setGraphic(listView);
                  }
                }
            };
        }
    };

    arrayListCol.setCellFactory(tableCellList);

这将替换[和]字符并将stringedArrayList拆分为ObservableList使用，作为拆分分隔符。

This replaces the "[" and "]" chars and splits the "stringed" ArrayList into an ObservableList by using "," as a split delimeter.

ObservableList用于ListView，然后通过以下行添加到单元格中：

The ObservableList is used for a ListView which is then added to the cell via the line:

setGraphic(listView);

。

|------|-----------|
|  e1  | String e  |
|  e2  |           |
|  e3  |           |
|------|-----------|
|  x1  | String x  |
|  x2  |           |
|------|-----------|

有什么不清楚的地方？ - >只是评论。

Anything unclear? -> just comment.

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