从相应的列标题节点获取javafx TableColumn [英] Get javafx TableColumn from corresponding column-header Node

问题描述

我正在替换表列的javafx上下文菜单。上下文菜单将为用户提供excel的访问权限，例如过滤表视图。
一切正常，但我现在不想在列标题上的任何鼠标点击事件上打开上下文菜单。不仅仅是标准的右键单击。

I'm replacing the javafx context menus of a table's columns. The context menu will give the user access to excel like filtering of the table view. Everything is working, but i now wan't to open the context menu on any mouse click event on the column header. Not just the standard right click.

问题是，您只能通过父表视图中的lookupAll（）获取标题节点。
由于事实，只有在表视图呈现后才能进行查找，我使用Platform.runLater（..）调用此方法。

The problem hereby is, that you can only get the header node by a lookupAll() inside the parent tableview. Due to the fact, that a lookup is only possible after the table view has been rendered, i call this method with a Platform.runLater(..).

TableView类：

TableView Class:

private void setHeaderNodesEventHandler() {
    int i = 0;
    for (final Node headerNode : lookupAll(".column-header")) {
        ((AbstractFilterableTableColumn<E, ?>) getColumns().get(i)).setHeaderNodeEventHandler(headerNode);
        i++;
    }
}

TableColumn类：

TableColumn Class:

public void setHeaderNodeEventHandler(final Node headerNode) {
    headerNode.addEventHandler(MouseEvent.MOUSE_CLICKED, new EventHandler<MouseEvent>(){

        @Override
        public void handle(final MouseEvent e) {
            contextMenu.show(headerNode, e.getScreenX(), e.getScreenY());
        }
    });
}

这里的问题是，我必须相信，找到的顺序headerNodes与列相同。我真的不需要在这里发生不好的事情。

Problem here is, that i have to believe, that the order of the found headerNodes is the same as the columns. And i really don't need something bad happen here.

我宁愿有类似的东西（见下文），这是不可能的，因为我不能从Parent转换为我的AbstractFilterableTableColumn。

I would rather have something like that (see below), which is not possible, because i'm not able to cast from Parent to my AbstractFilterableTableColumn.

    private void setHeaderNodesEventHandler() {
        for (final Node headerNode : lookupAll(".column-header")) {
            final AbstractFilterableTableColumn<E, ?> column = (AbstractFilterableTableColumn<E, ?>) headerNode.getParent();
            column.setHeaderNodeEventHandler(headerNode);
        }
    }

您有什么想法获取headerNodes及其相应的表格列而不信任订购？

Do you have any ideas to get the headerNodes and their respective table column without trusting the ordering?

所以，如果有人有我的问题的解决方案..我会非常感激。 ：）

So if anyone has a solution for my problem.. i would really appreciate it. :)

推荐答案

创建列时，使用标签作为图形而不是设置文本。然后，您可以使用 Label 注册所需的鼠标监听器。我没有对此进行测试，但以下几行中的内容应该有效：

When you create your columns, use a Label as a graphic instead of setting the text. Then you can register the mouse listener you need with the Label. I haven't tested this, but something along the following lines should work:

TableColumn<S, T> column = new TableColumn<S, T>();
Label columnHeader = new Label("Column Name");
column.setGraphic(columnHeader);

// note you can pass your TableColumn to the setHeaderNodeEventHandler(...)
// method too, so you can access the actual column represented if you need
setHeaderNodeEventHandler(columnHeader);

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