Doc: Compile GUI util snippets

Fix minor issues (e.g. whitespace, missing semi-colon) in passing.

Change-Id: Ieec8deb8aaf4358ffc35502fae6ea7c043d34672
Done-with: Nico Vertriest <nico.vertriest@qt.io>
Task-number: QTBUG-81486
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>

src/gui/doc/snippets/code/code.pro

@@ -40,4 +40,6 @@ SOURCES = \
     src_gui_text_qtextcursor.cpp \
     src_gui_text_qtextdocument.cpp \
     src_gui_text_qtextdocumentwriter.cpp \
-    src_gui_text_qtextlayout.cpp
+    src_gui_text_qtextlayout.cpp \
+    src_gui_util_qdesktopservices.cpp \
+    src_gui_util_qvalidator.cpp

src/gui/doc/snippets/code/src_gui_util_qdesktopservices.cpp

@@ -47,27 +47,49 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
+#include <QDesktopServices>
+#include <QObject>
+#include <QStandardPaths>
+#include <QUrl>
+
+namespace src_gui_util_qdesktopservices {
 
 //! [0]
 class MyHelpHandler : public QObject
 {
     Q_OBJECT
 public:
-    ...
+    // ...
 public slots:
     void showHelp(const QUrl &url);
 };
-
-QDesktopServices::setUrlHandler("help", helpInstance, "showHelp");
 //! [0]
 
+void wrapper0() {
+MyHelpHandler *helpInstance = nullptr;
+//! [setUrlHandler]
+QDesktopServices::setUrlHandler("help", helpInstance, "showHelp");
+//! [setUrlHandler]
+} // wrapper
+
+
+/* comment wrapper 1
+
 //! [1]
 mailto:user@foo.com?subject=Test&body=Just a test
 //! [1]
 
+*/ // comment wrapper 1
+
+
+void wrapper1() {
 //! [2]
 QDesktopServices::openUrl(QUrl("file:///C:/Documents and Settings/All Users/Desktop", QUrl::TolerantMode));
 //! [2]
+}
+
+
+/* comment wrapper 2
 
 //! [3]
 <key>LSApplicationQueriesSchemes</key>
@@ -88,12 +110,18 @@ QDesktopServices::openUrl(QUrl("file:///C:/Documents and Settings/All Users/Desk
 </array>
 //! [4]
 
+*/ // comment wrapper 2
 
+
+void wrapper3() {
 //! [6]
 QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation) +
-    "/data/organization/application"
+    "/data/organization/application";
 //! [6]
+} // wrapper3
 
+
+/* comment wrapper 3
 //! [7]
 <key>com.apple.developer.associated-domains</key>
 <array>
@@ -115,3 +143,8 @@ QStandardPaths::writableLocation(QStandardPaths::GenericDataLocation) +
     }
 }
 //! [8]
+
+*/ // comment wrapper 3
+
+
+} // src_gui_util_qdesktopservices

src/gui/doc/snippets/code/src_gui_util_qvalidator.cpp

@@ -47,7 +47,19 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
+#include <QLineEdit>
+#include <QValidator>
+#include <QWidget>
 
+namespace src_gui_util_qvalidator {
+
+struct Wrapper : public QWidget {
+    void wrapper0();
+    void wrapper1();
+    void wrapper2();
+};
+
+void Wrapper::wrapper0() {
 //! [0]
 QValidator *validator = new QIntValidator(100, 999, this);
 QLineEdit *edit = new QLineEdit(this);
@@ -84,7 +96,11 @@ v.validate(str, pos);     // returns Invalid
 str = "12cm";
 v.validate(str, pos);     // returns Invalid
 //! [1]
+} // Wrapper::wrapper0
 
+void Wrapper::wrapper1() {
+QString s;
+QIntValidator v(100, 900, this);
 
 //! [2]
 int pos = 0;
@@ -98,6 +114,10 @@ v.validate(s, pos);    // returns Intermediate
 s = "50";
 v.validate(s, pos);    // returns Acceptable
 //! [2]
+} // Wrapper::wrapper1
+
+
+void Wrapper::wrapper2() {
 
 //! [5]
 // regexp: optional '-' followed by between 1 and 3 digits
@@ -133,7 +153,7 @@ s = "A12345Z"; v.validate(s, pos);        // Returns Acceptable
 s = "B12";     v.validate(s, pos);        // Returns Intermediate
 
 // match most 'readme' files
-re.setPattern("read\\S?me(\.(txt|asc|1st))?");
+re.setPattern("read\\S?me(\\.(txt|asc|1st))?");
 re.setPatternOptions(QRegularExpression::CaseInsensitiveOption);
 v.setRegularExpression(re);
 s = "readme";      v.validate(s, pos); // Returns Acceptable
@@ -141,3 +161,7 @@ s = "README.1ST";  v.validate(s, pos); // Returns Acceptable
 s = "read me.txt"; v.validate(s, pos); // Returns Invalid
 s = "readm";       v.validate(s, pos); // Returns Intermediate
 //! [6]
+
+} // Wrapper::wrapper2
+
+} // src_gui_util_qvalidator

src/gui/util/qdesktopservices.cpp

@@ -135,6 +135,7 @@ void QOpenUrlHandlerRegistry::handlerDestroyed(QObject *handler)
     inside the application:
 
     \snippet code/src_gui_util_qdesktopservices.cpp 0
+    \snippet code/src_gui_util_qdesktopservices.cpp setUrlHandler
 
     If inside the handler you decide that you can't open the requested
     URL, you can just call QDesktopServices::openUrl() again with the