Question

第一次加载程序时，自动完成组合框的箭头键选择起作用。但是，在我使用箭头键下方的方法清除并重新加载其中的值后，选择组合框项目不起作用。我使用ControlsFx 8中的TextFields.bindAutoCompletion方法来绑定组合框。

// load Auto Compleat nic,fname,lname,id values for search Combo Box
private void loadValuesToComboSearchBox() {
    try {
        // clear elements of Search Combo Box
        comboSearch.getItems().clear();

        // Disable Search Combo Box
        comboSearch.setEditable(false);

        // load Auto Compleat nic,fname,lname,id values for search Text Field
        ResultSet getsearchElements = employeDao.getSearchemployeeByNicFnameLnmeId();
        LinkedHashSet<String> addElements = new LinkedHashSet<>();

        while (getsearchElements.next()) {
            addElements.add(getsearchElements.getString("id"));
            addElements.add(getsearchElements.getString("firstname"));
            addElements.add(getsearchElements.getString("lastname"));
            addElements.add(getsearchElements.getString("nic"));
        }

        // Add elements to Auto Compleat Text Field
        TextFields.bindAutoCompletion(comboSearch.getEditor(), addElements);

        // Enable Search Combo Box
        comboSearch.setEditable(true);
    } catch (Exception e) {
        new Alert(Alert.AlertType.INFORMATION, e + "", ButtonType.OK).showAndWait();
        e.printStackTrace();
    }
}

Answer 1

我认为，由于多个重叠的AutoCompletionBinding导致出现此问题。为了解决该问题，您应该保留对先前绑定的引用，并在重新加载时将其处置。另外，请注意，要清除JavaFX组合框中的选择，应执行更多步骤。

private AutoCompletionBinding<String> completion;
....
private void loadValuesToComboSearchBox() {
    try {
        // clear selection
        comboSearch.getItems().clear();
        comboSearch.valueProperty().set(null);
        comboSearch.getEditor().clear();

        comboSearch.setEditable(false);
        ResultSet getSearchElements = employeDao.getSearchemployeeByNicFnameLnmeId();
        Set<String> addElements = new LinkedHashSet<>();
        while (getSearchElements.next()) {
            addElements.add(getSearchElements.getString("id"));
            addElements.add(getSearchElements.getString("firstname"));
            addElements.add(getSearchElements.getString("lastname"));
            addElements.add(getSearchElements.getString("nic"));
        }

        if (completion != null) {
            completion.dispose();
        }
        completion = TextFields.bindAutoCompletion(comboSearch.getEditor(), addElements);
        comboSearch.setEditable(true);
    } catch (Exception e) {
        new Alert(Alert.AlertType.INFORMATION, e + "", ButtonType.OK).showAndWait();
        e.printStackTrace();
    }
}

重新加载组合框值java Fx时，箭头键选择不适用于自动补全组合框

1 个答案: