JTabbedPane：标签左侧的图标

问题描述

你好，我正在使用灵气的外观，并有一个带有图标和文字的tabbedpane。
现在图标显示在文本的右侧，而我想在左侧显示。

hello i am using the nimbus look-and-feel and have a tabbedpane with an icon and text.now the icon appears on the right side of the text, while i would like to have it on the left side.

我还想添加一些图标和文字之间的间距。

also i would like to add some spacing between the icon and the text.

谢谢！

推荐答案

您需要自己设置标签组件;它控制选项卡标题的呈现方式。

You need to set the tab component yourself; which governs how the tab title is rendered.

// Create tabbed pane and add tabs.
JTabbedPane tabbedPane = ...

// Create bespoke component for rendering the tab.
JLabel lbl = new JLabel("Hello, World");
Icon icon = new ImageIcon(getClass().getResource("/foo/bar/hello.jpg"));
lbl.setIcon(icon);

// Add some spacing between text and icon, and position text to the RHS.
lbl.setIconTextGap(5);
lbl.setHorizontalTextPosition(SwingConstants.RIGHT);

// Assign bespoke tab component for first tab.
tabbedPane.setTabComponentAt(0, lbl);

显然你可以用实用工具方法封装它：

Obviously you could encapsulate this in a utility method:

private void addTab(JTabbedPane tabbedPane, Component tab, String title, Icon icon) {
  tabbedPane.add(tab);

  JLabel lbl = ... // Create bespoke label for rendering tab title.

  tabbedPane.setTabComponentAt(tabbedPane.getTabCount() - 1, lbl);
}

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