GraphPreviewDialog.java 文件源码

/** Returns the main panel shown on this dialog. */
public GraphPreviewPanel getContent() {
    if (this.contentPanel == null) {
        this.contentPanel = new GraphPreviewPanel(getJGraph());
        this.contentPanel.initialise();
        this.contentPanel.setEnabled(true);
        // make any dialog in which this panel is embedded resizable
        // taken from https://blogs.oracle.com/scblog/entry/tip_making_joptionpane_dialog_resizable
        this.contentPanel.addHierarchyListener(new HierarchyListener() {
            @Override
            public void hierarchyChanged(HierarchyEvent e) {
                Window window =
                    SwingUtilities.getWindowAncestor(GraphPreviewDialog.this.contentPanel);
                if (window instanceof Dialog) {
                    Dialog dialog = (Dialog) window;
                    if (!dialog.isResizable()) {
                        dialog.setResizable(true);
                    }
                }
            }
        });
    }
    return this.contentPanel;
}