当涉及到 JTextPanes 的主题时,我发现 Internet 上缺少大量有用的文档/教程。我正在尝试做一个简单的文本处理器,我希望它能够从 JComboBox 中选择一个字体系列,该字体系列根据用户在其系统上安装的字体自行填充。但是,无论我尝试什么实验,我都无法弄清楚如何让它发挥作用。
我所拥有的是一个建立在 JTextPane 之上的工具栏类。目前,它有一堆样式按钮,用于设置对齐和粗体、斜体和下划线。
这是我的代码:
/**
* The StyleBar is used to customize styles in a Styled Document. It will take a
* JTextPane as an argument for its constructor and then all actions to be taken
* will affect the text in it.
*
* @author Andrew
*/
public class StyleBar extends JToolBar {
private JLabel fontLbl;
private JComboBox fontBox;
// ...Irrelevant stuff to the problem at hand.
/**
* The initEvents method is used to initialize the necessary events for the
* tool bar to actually do its job. It establishes the focus listener to the
* buttons on the bar, and gives each one its individual functionality. It
* also establishes the Font Selection interface.
*/
public void initEvents() {
//For each item in the tool bar, add the focus listener as well as the
//formatting listeners:
boldFormat.addActionListener(new StyledEditorKit.BoldAction()); //boldFormat is
boldFormat.addActionListener(resetFocus); //a JButton
//Ditto for my italicsFormat and underlineFormat button(s) in the toolbar
leftAlign.addActionListener(new StyledEditorKit.AlignmentAction(null,
StyleConstants.ALIGN_LEFT));
leftAlign.addActionListener(resetFocus); //This listener just resets focus
//back onto the TextPane.
//Ditto for my right and centerAlign buttons
//Set up the Font list, and add a listener to the combo box
buildFontMenu();
}
/**
* The buildFontMenu detects all of the SYstem's available fonts and adds
* them to the Font Selection box.
*/
public void buildFontMenu(){
GraphicsEnvironment ge =
GraphicsEnvironment.getLocalGraphicsEnvironment();
final String[] fontNames = ge.getAvailableFontFamilyNames();
for (int i = 0; i < fontNames.length; i++){
//What do I do here to take the entry at String[i] and make it so that when
//the user selects it it sets the font Family in a similar way to that of
//pressing the boldFormat button or the leftAlign button?
}
}
//Everything else is irrelevant
所以总结一下我的问题:我不知道如何正确地将侦听器设置为 ComboBox 以便 a) 它对所选的单个字体敏感 b) 以某种方式使用 StyledEditorKit.FontFamilyAction 让生活变得轻松?
斜线,如果我以错误的方式处理这个问题,我很想听听正确的方式。正如我所说,我在互联网上的消息来源对这个问题不是很清楚。
非常感谢!