style_setpara.html
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<TITLE>Retaining the Logical Style When Setting a New Paragraph Style
(Java Developers Almanac Example)
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<META CONTENT="Patrick Chan" NAME="AUTHOR">
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<h3>
e1011.
Retaining the Logical Style When Setting a New Paragraph Style</h3>
Logical styles are a collection of attributes that apply
after the attributes of the paragraph style are applied.
A common misconception of logical and paragraph styles
is that they are independent.
That is, setting a new logical style does not affect
the current paragraph style and vice versa.
<P> However, a logical style is nothing more than the parent of a
paragraph style. If you replace the paragraph style, the logical
style is replaced or removed as well. If you set a new logical style,
the current parent of the current paragraph style (if any), is
replaced with the new logical style.
<P>
In order to retain the logical style when setting a new
paragraph style in non-replace mode, and is necessary
to get the current logical style and restore it
after setting the new paragraph style.
<pre>
JTextPane textPane = new JTextPane();
// Set logical style
Style style = textPane.addStyle(null, null);
StyleConstants.setForeground(style, <font color="#0066ff"><i>Color.red</i></font>);
textPane.setLogicalStyle(style);
// paragraph is now red
// Set paragraph style; removes logical style
style = textPane.addStyle(null, null);
StyleConstants.setUnderline(style, <font color="#0066ff"><i>true</i></font>);
textPane.setParagraphAttributes(style, true);
// paragraph is now underlined, not red
// Set logical style; replaces paragraph style's parent
style = textPane.addStyle(null, null);
StyleConstants.setForeground(style, <font color="#0066ff"><i>Color.red</i></font>);
textPane.setLogicalStyle(style);
// paragraph is now red and underlined
// Get logical style and restore it after new paragraph style
Style logicalStyle = textPane.getLogicalStyle();
style = textPane.addStyle(null, null);
StyleConstants.setBold(style, <font color="#0066ff"><i>true</i></font>);
textPane.setParagraphAttributes(style, true);
textPane.setLogicalStyle(logicalStyle);
// paragraph is now red and bold
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Related Examples
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e1005. <a class="eglink" href="style_HiliteWords.html?l=rel">
Highlighting Words in a JTextComponent
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e1006. <a class="eglink" href="style_HiliteWords2.html?l=rel">
Setting the Font and Color of Text in a JTextPane Using Styles
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e1007. <a class="eglink" href="style_ShareStyleContext.html?l=rel">
Sharing Styles Between JTextPanes
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e1008. <a class="eglink" href="style_ListStyles.html?l=rel">
Listing the Styles Associated with a JTextPane
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e1009. <a class="eglink" href="style_ListAttr.html?l=rel">
Listing the Attributes in a Style
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e1010. <a class="eglink" href="style_ListStyles2.html?l=rel">
Using a Popup to Apply Styles to a JTextPane
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e1012. <a class="eglink" href="style_ModStyle.html?l=rel">
Automatically Updating Styled Text When a Style Is Updated
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e1013. <a class="eglink" href="style_IsCharPara.html?l=rel">
Determining If a Style Attribute Applies to a Character or the Paragraph
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See also:
<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#Actions%20and%20Key%20Bindings">
Actions and Key Bindings
</a>
<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#Caret%20and%20Selection">
Caret and Selection
</a>
<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#Events">
Events
</a>
<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#JEditorPane">
JEditorPane
</a>
<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#JFormattedTextField">
JFormattedTextField
</a>
<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#JTextArea">
JTextArea
</a>
<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#JTextComponent">
JTextComponent
</a>
<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#JTextField">
JTextField
</a>
<a class="eglink" href="/egs/javax.swing.text/pkg.html?l=rel#JTextPane">
JTextPane
</a>
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</tr>
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