如何调整 JavaFX ScrollPane 内容的大小以适合当前大小

问题描述

我有一个以 ScrollPane 作为中心元素的 BorderPane.它会自动调整大小以填满屏幕.ScrollPane 内部是一个 HBox，它没有内容，但是是一个拖放目标.因此，我希望它填充其父 ScrollPane.

I have a BorderPane with a ScrollPane as the center element. It resizes automatically to fill the screen. Inside the ScrollPane is a HBox that has no content but is a drag-and-drop target. Therefore I want it to fill its parent ScrollPane.

最好的方法是什么?

到目前为止，我尝试的是重写 ScrollPane.resize(...) 方法来调整 HBox 的大小，但这似乎相当复杂且不合常规.

What I have tried so far is overriding the ScrollPane.resize(...) method to resize the HBox but it seems rather complicated and unorthodox.

要添加一些有用的代码，这是我可以解决问题的方法，但我相信必须有一些更好的方法来做到这一点:

edit: To add some useful code to this, this is how I can workaround the problem, but I believe there has to be some better way to do this:

@Override
public void resize(double width, double height) {
    super.resize(width, height);

    double scrollBarHeight = 2;
    double scrollBarWidth = 2;

    for (final Node node : lookupAll(".scroll-bar")) {
        if (node instanceof ScrollBar) {
            ScrollBar sb = (ScrollBar) node;
            if (sb.getOrientation() == Orientation.HORIZONTAL) {
                System.out.println("horizontal scrollbar visible = " + sb.isVisible());
                System.out.println("width = " + sb.getWidth());
                System.out.println("height = " + sb.getHeight());
                if(sb.isVisible()){
                    scrollBarHeight = sb.getHeight();
                }
            }
            if (sb.getOrientation() == Orientation.VERTICAL) {
                System.out.println("vertical scrollbar visible = " + sb.isVisible());
                System.out.println("width = " + sb.getWidth());
                System.out.println("height = " + sb.getHeight());
                if(sb.isVisible()){
                    scrollBarWidth = sb.getWidth();
                }
            }
        }
    }

    hBox.setPrefSize(width-scrollBarWidth, height-scrollBarHeight);
}

部分代码取自这里:如何访问滚动条滚动窗格

推荐答案

试试

ScrollPane scrollPane = new ScrollPane();
scrollPane.setFitToHeight(true);
scrollPane.setFitToWidth(true);

不覆盖 resize() 方法.

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