Gef / draw2d：如何获取自动换行文本的高度

Question

So I'm making a draw2d program. I have some inputted text which I word wrap by doing:

    TextFlow textWrapper = new TextFlow(_title);
    FlowPage flowPage = new FlowPage();
    flowPage.add(textWrapper);

Now I need to find the height of the text inside it's container with a fixed width. So far I haven't been able to find a way to do so. Other threads I've looked at have mentioned using the getPreferredSize() method but this fails to return the correct height.

Any advice would be helpful, thanks.

Answer 1

You should be able to get this value by invoking getPreferredSize(<your width>, -1) . Worked for me, as you can read here . Just remember that you have to invalidate the container for it to work, otherwise it will take values from it's internal cache (at least that is what I remember).