java JTabbedPane - 在选项卡周围设置默认边框..？

JTabbedPane - set default border around tabs..?

提问by ClarkeyBoy

I am using a JTabbedPane in my application. I have added two tabs which are instances of a custom class "ContentPanel". This extends JPanel and sets the background, border etc etc. Basically it means I dont have to set the properties of each JPanel I want to apply this colour scheme to. I notice that not only does their border appear but another border (which, I think, is blue - at least on my screen) appears around this border, connected to the tab "selectors" themselves (i.e. the buttons you click on to get the appropriate view). I would like to change this border as it just looks odd against a gold / brown colour scheme. Does anyone have any idea how to do this? I have tried JTabbedPane.setBorder(Border b) but that doesnt work. That simply sets a border around the entire thing, including the tab selectors.. not what I want.

我在我的应用程序中使用 JTabbedPane。我添加了两个选项卡，它们是自定义类“ContentPanel”的实例。这扩展了 JPanel 并设置了背景、边框等。基本上这意味着我不必设置要应用此配色方案的每个 JPanel 的属性。我注意到不仅它们的边框出现了，而且另一个边框（我认为它是蓝色的 - 至少在我的屏幕上）出现在这个边框周围，连接到选项卡“选择器”本身（即你点击的按钮以获得适当的看法）。我想更改此边框，因为它在金色/棕色配色方案中看起来很奇怪。有谁知道如何做到这一点？我试过 JTabbedPane.setBorder(Border b) 但这不起作用。这只是在整个事物周围设置一个边框，包括选项卡选择器......不是我想要的。

Any help with this would be greatly appreciated.

对此的任何帮助将不胜感激。

回答by akf

These colors are defined in the Look and Feel. If you look at the code for BasicTabbedPaneUI, you will notice that installDefaults()sets a bunch of protected Colorinstance variables. The keys they are defined against in the L&F are also available here.

这些颜色在外观和感觉中定义。如果您查看 的代码BasicTabbedPaneUI，您会注意到它installDefaults()设置了一堆protected Color实例变量。在 L&F 中定义的键也可在此处获得。

protected void installDefaults() {
    LookAndFeel.installColorsAndFont(tabPane, "TabbedPane.background",
                                "TabbedPane.foreground", "TabbedPane.font");     
    highlight = UIManager.getColor("TabbedPane.light");
    lightHighlight = UIManager.getColor("TabbedPane.highlight");
    shadow = UIManager.getColor("TabbedPane.shadow");
    darkShadow = UIManager.getColor("TabbedPane.darkShadow");
    //...
    // a lot more stuff
    //...
}

If you do not want to go as far as define your own L&F, you have the ability to set a custom UI delegate on your tabbed pane:

如果您不想定义自己的 L&F，则可以在选项卡式窗格上设置自定义 UI 委托：

myTabbedPane.setUI(new BasicTabbedPaneUI() {
   @Override
   protected void installDefaults() {
       super.installDefaults();
       highlight = Color.pink;
       lightHighlight = Color.green;
       shadow = Color.red;
       darkShadow = Color.cyan;
       focus = Color.yellow;
   }
});

you may of course want to change those color settings. As set, you will see which vars are used where.

您当然可能想要更改这些颜色设置。设置后，您将看到在何处使用了哪些变量。

回答by David

None affecting L&F and JVM run-time system-wide settings code solution.

不会影响 L&F 和 JVM 运行时系统范围的设置代码解决方案。

Create your own tabbed-pane class and nested tabbed-pane-UI class to deal with the issue for a "specific" class of tabbed-pane. The code below is original: (The last answer was 2010, but this may be useful too.)

创建您自己的选项卡窗格类和嵌套的选项卡窗格 UI 类来处理“特定”选项卡窗格类的问题。下面的代码是原始代码：（最后一个答案是 2010 年，但这也可能有用。）

public class DisplayTabbedPane extends JTabbedPane implements 
     MouseListener, ChangeListener {

    public DisplayTabbedPane() {

        setTabPlacement(SwingConstants.BOTTOM);

        // UIManager.put("TabbedPane.contentBorderInsets", new Insets(0, 0, 0, 0)); 
        // works but is a JVM system wide change rather than a specific change
        NoInsetTabbedPaneUI ui = new NoInsetTabbedPaneUI();

        // this will build the L&F settings for various tabbed UI components.
        setUI( ui );

        // override the content border insets to remove the tabbed-pane
        // blue border around the pane
        ui.overrideContentBorderInsetsOfUI();

    }

    /**
     * Class to modify the UI layout of tabbed-pane which we wish to override
     * in some way. This modification only applies to objects of this class.
     * Doing UIManager.put("TabbedPane.contentBorderInsets", new Insets(0, 0, 0, 0)); 
     * would affect all tabbed-panes in the JVM run-time.
     * 
     * This is free to use, no copyright but is "AS IS".
     */
    class NoInsetTabbedPaneUI extends MetalTabbedPaneUI {
        /**
         * Create tabbed-pane-UI object to allow fine control of the
         * L&F of this specific object.
         */
        NoInsetTabbedPaneUI(){
            super();
        }
        /**
         * Override the content border insets of the UI which represent
         * the L&F of the border around the pane. In this case only care
         * about having a bottom inset.
         */
        public void overrideContentBorderInsetsOfUI(){
            this.contentBorderInsets.top = 0;
            this.contentBorderInsets.left = 0;
            this.contentBorderInsets.right = 0;
            this.contentBorderInsets.bottom = 2;        
        }
    }
    ........

}

回答by Harsha Sampath

Change Look And Feel with "UIManager"

使用“UIManager”改变外观

            UIManager.getLookAndFeelDefaults().put("TabbedPane:TabbedPaneTab[Enabled].backgroundPainter", new BackgroundPainter(Color.white));
            UIManager.getLookAndFeelDefaults().put("TabbedPane:TabbedPaneTab[Enabled+MouseOver].backgroundPainter", new BackgroundPainter(Color.white));
            UIManager.getLookAndFeelDefaults().put("TabbedPane:TabbedPaneTab[Enabled+Pressed].backgroundPainter", new BackgroundPainter(Color.white));
            UIManager.getLookAndFeelDefaults().put("TabbedPane:TabbedPaneTab[Focused+MouseOver+Selected].backgroundPainter", new BackgroundPainter(Color.white));
            UIManager.getLookAndFeelDefaults().put("TabbedPane:TabbedPaneTab[Focused+Pressed+Selected].backgroundPainter", new BackgroundPainter(Color.white));
            UIManager.getLookAndFeelDefaults().put("TabbedPane:TabbedPaneTab[Focused+Selected].backgroundPainter", new BackgroundPainter(Color.GRAY));
            UIManager.getLookAndFeelDefaults().put("TabbedPane:TabbedPaneTab[MouseOver+Selected].backgroundPainter", new BackgroundPainter(Color.white));
            UIManager.getLookAndFeelDefaults().put("TabbedPane:TabbedPaneTab[Pressed+Selected].backgroundPainter", new BackgroundPainter(Color.white));
            UIManager.getLookAndFeelDefaults().put("TabbedPane:TabbedPaneTab[Selected].backgroundPainter", new BackgroundPainter(Color.white));

BackgroundPainter class

BackgroundPainter 类

public class BackgroundPainter implements Painter<JComponent> {

private Color color = null;

BackgroundPainter(Color c) {
    color = c;
}

@Override
public void paint(Graphics2D g, JComponent object, int width, int height) {
    if (color != null) {
        g.setColor(color);
        g.fillRect(0, 0, width - 1, height - 1);
    }
}

}

}