如何设置JTabbedPane选项卡高度宽度背景前景色（选定和未选定的选项卡）

Question

如何设置 JTabbedPane 选项卡背景和前景、高度和宽度（选定和未选定的选项卡）

Answer 1

您可以为 UIDefaults 设置新值：

        UIDefaults def = UIManager.getLookAndFeelDefaults();
        def.put( "TabbedPane.foreground", Color.RED );
        def.put( "TabbedPane.textIconGap", new Integer(16) );
        def.put( "TabbedPane.background", Color.BLUE );
        def.put( "TabbedPane.tabInsets", new Insets(10,10,10,10) );
        def.put( "TabbedPane.selectedTabPadInsets", new Insets(10,20,10,20) );

这里是 Nimbus LookAndFeel 的键列表，

TabbedPane.textIconGap
TabbedPane.contentOpaque
TabbedPane.focus
TabbedPane.foreground
TabbedPane.tabRunOverlay
TabbedPane.shadow
TabbedPane.darkShadow
TabbedPane.background
TabbedPane.ancestorInputMap
TabbedPane.focusInputMap
TabbedPane.tabInsets
TabbedPane.light
TabbedPane.contentBorderInsets
TabbedPane.tabsOverlapBorder
TabbedPane.tabsOpaque
TabbedPane.tabAreaInsets
TabbedPane.highlight
TabbedPane.font
TabbedPane.selectedTabPadInsets

还有一些其他 Nimbus 默认值例如：

      TabbedPane:TabbedPaneTabArea.contentMargins
      TabbedPane:TabbedPaneTabArea[Enabled].backgroundPainter
      TabbedPane:TabbedPaneTab[Selected].backgroundPainter
      TabbedPane:TabbedPaneTabArea[Enabled].backgroundPainter
      TabbedPane:TabbedPaneTab.contentMargins
      TabbedPane.tabOverlap

Answer 2

更改选项卡高度和宽度的一种方法是在选项卡标签中使用 HTML 和/或 CSS。为此，您可以在 HTML“span”或“p”元素中使用 CSS padding 属性。

Answer 3

您可以按如下方式控制高度：

JTabbedPane tabs = new JTabbedPane();
tabs.setUI(new BasicTabbedPaneUI() {
    @Override
    protected int calculateTabHeight(int tabPlacement, int tabIndex, int fontHeight) {
        return 45; // manipulate this number however you please.
    }
});

如果每个选项卡需要不同的高度，这个答案也可能有用：如何处理 JTabbedPane 中选项卡标题的高度