JSplitPane只滑动到一侧

Question

我不知道为什么，但滑动条只到左边，甚至锁定新的位置。它使用了带有JTree和JEditorPane的NestedJSplitPane教程的修改版本。我的猜测是，JEditorPane导致了这个问题…

public frameMenu(){
    JEditorPane htmlPane;
    JTree parkSelect;
    JTree triggerSelect;
    URL helpURL;
    DefaultMutableTreeNode left = new DefaultMutableTreeNode("Tree Left");
    DefaultMutableTreeNode triggerTree = new DefaultMutableTreeNode("Tree Down");
    //nNode.createNodes();
    int HORIZSPLIT = JSplitPane.HORIZONTAL_SPLIT;
    int VERTSPLIT = JSplitPane.VERTICAL_SPLIT;
    boolean continuousLayout = true;
    parkSelect = new JTree(left);
    parkSelect.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
    htmlPane = new JEditorPane();
    htmlPane.setEditable(true);
    triggerSelect = new JTree(triggerTree);
    triggerSelect.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
    JSplitPane splitPane1 = new JSplitPane(VERTSPLIT, continuousLayout, htmlPane, triggerSelect);
    splitPane1.setOneTouchExpandable(true);
    splitPane1.setDividerSize(2);
    splitPane1.setDividerLocation(0.5);
    JSplitPane splitPane2 = new JSplitPane(HORIZSPLIT, parkSelect, splitPane1);
    splitPane2.setOneTouchExpandable(true);
    splitPane2.setDividerLocation(0.4);
    splitPane2.setDividerSize(2);
    JFrame frame = new JFrame("Trigger Editor");
    frame.setSize(600, 400);
    frame.add(splitPane2);
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.pack();
    frame.setVisible(true);
}

这更像是一个片段，但问题是一样的。我不知道我能在一篇文章里放多少代码。

上下分条滑动没有问题，但左右分条滑动就有问题了

Answer 1

滑块只向左移动，甚至锁定新位置

JSplitPane满足组件的最小尺寸。

我猜是JEditorPane导致了这个问题…

正确，JEditorPane的最小大小似乎等于它的首选大小。

你需要重写你的JEditorPane的getMinimumSize()方法来返回一个更合理的值来满足你的需求:

htmlPane = new JEditorPane()
{
    @Override
    public Dimension getMinimumSize()
    {
        Dimension d = super.getMinimumSize();
        d.width = 100;
        return d;
    }
};