Java FX 2表单元格编辑和焦点 [英] Java FX 2 Table Cell Editing and Focus

问题描述

我已经学习了一些有关JavaFX 2的知识，但是遇到了可编辑表格单元的问题，我也找不到解决方案.为了节省大量代码，我创建了一个项目，该项目仅包含JavaFX文档中的TableView示例:

I've been learning a bit about JavaFX 2 but I've hit a problem with editable table cells that I can't find a solution too. To save pasting in a lot of code I've created a project that contains only the TableView example from the JavaFX documentation: http://docs.oracle.com/javafx/2/ui_controls/table-view.htm

如果运行此代码，则会看到以下行为:

If you run up this code you see this behaviour:

1. 单击一行将选择该行.
2. 单击所选行中的单元格会将单元格转换为文本字段，以便可以对其进行编辑.
3. 单击文本字段可以编辑内容.

问题在于单击三下即可到达可编辑单元格的位置.我想实现的是当创建的文本字段(例如第2步)焦点直接切换到文本字段时.

The problem is that's three clicks to get to the point where the cell can be edited. What I would like to achieve is when the text field in created (e.g. step 2) focus switches to the text field directly.

关于如何实现此目标的最佳猜测是在startEditing()方法的末尾添加textField.requestFocus():

My best guess regarding how to achieve this was to add textField.requestFocus() to the end of the the startEditing() method:

@Override
public void startEdit() {
    super.startEdit();

    if (textField == null) {
        createTextField();
    }
    setGraphic(textField);
    setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
    textField.selectAll();
    textField.requestFocus();
}

但这不起作用.如果我在文本字段中添加焦点侦听器，我会发现它获得了焦点，但随后又失去了焦点.在侦听器中插入一个断点似乎表明TableView在显示文本字段之前已重新获得焦点.

but this doesn't work. If I add a focus listener to the text field what I find is that it gets focus but then looses it again. Sticking a break point in the listener seems to indicate that the TableView is taking focus back before the text field is displayed.

因此，问题是开始编辑时如何将焦点放在文本字段上?

The question therefore is how do I give focus to the text field when editing starts?

推荐答案

能否将textField.requestFocus();行替换为:

      Platform.runLater(new Runnable() {
            @Override
            public void run() {
                textField.requestFocus();
            }
       });

然后重试.

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