1 files changed, 86 insertions, 0 deletions
diff --git a/doc/src/snippets/code/src_gui_text_qsyntaxhighlighter.cpp b/doc/src/snippets/code/src_gui_text_qsyntaxhighlighter.cpp
new file mode 100644
index 0000000..5dd2e0d
--- /dev/null
+++ b/doc/src/snippets/code/src_gui_text_qsyntaxhighlighter.cpp
@@ -0,0 +1,86 @@
+//! [0]
+QTextEdit *editor = new QTextEdit;
+MyHighlighter *highlighter = new MyHighlighter(editor->document());
+//! [0]
+
+
+//! [1]
+void MyHighlighter::highlightBlock(const QString &text)
+{
+    QTextCharFormat myClassFormat;
+    myClassFormat.setFontWeight(QFont::Bold);
+    myClassFormat.setForeground(Qt::darkMagenta);
+    QString pattern = "\\bMy[A-Za-z]+\\b";
+
+    QRegExp expression(pattern);
+    int index = text.indexOf(expression);
+    while (index >= 0) {
+        int length = expression.matchedLength();
+        setFormat(index, length, myClassFormat);
+        index = text.indexOf(expression, index + length);
+    }
+}
+//! [1]
+
+
+//! [2]
+QTextCharFormat multiLineCommentFormat;
+multiLineCommentFormat.setForeground(Qt::red);
+
+QRegExp startExpression("/\\*");
+QRegExp endExpression("\\*/");
+
+setCurrentBlockState(0);
+
+int startIndex = 0;
+if (previousBlockState() != 1)
+    startIndex = text.indexOf(startExpression);
+
+while (startIndex >= 0) {
+   int endIndex = text.indexOf(endExpression, startIndex);
+   int commentLength;
+   if (endIndex == -1) {
+       setCurrentBlockState(1);
+       commentLength = text.length() - startIndex;
+   } else {
+       commentLength = endIndex - startIndex
+                       + endExpression.matchedLength();
+   }
+   setFormat(startIndex, commentLength, multiLineCommentFormat);
+   startIndex = text.indexOf(startExpression,
+                             startIndex + commentLength);
+}
+//! [2]
+
+
+//! [3]
+void MyHighlighter::highlightBlock(const QString &text)
+{
+    QTextCharFormat myClassFormat;
+    myClassFormat.setFontWeight(QFont::Bold);
+    myClassFormat.setForeground(Qt::darkMagenta);
+    QString pattern = "\\bMy[A-Za-z]+\\b";
+
+    QRegExp expression(pattern);
+    int index = text.indexOf(expression);
+    while (index >= 0) {
+        int length = expression.matchedLength();
+        setFormat(index, length, myClassFormat);
+        index = text.indexOf(expression, index + length);
+     }
+ }
+//! [3]
+
+
+//! [4]
+struct ParenthesisInfo
+{
+    QChar char;
+    int position;
+};
+
+struct BlockData : public QTextBlockUserData
+{
+    QVector<ParenthesisInfo> parentheses;
+};
+//! [4]