Doc: Make Qt Gui snippets compilable - textdocument-listitemstyles

Task-number: QTBUG-81486
Change-Id: Ie718f4ae3de3f9ae12702264f5455f23d38bf1fe
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>

src/gui/doc/snippets/snippets.pro

@@ -18,5 +18,6 @@ contains(QT_BUILD_PARTS, tests) {
         textdocument-imagedrop \
         textdocument-imageformat \
         textdocument-images \
-        textdocument-listitems
+        textdocument-listitems \
+        textdocument-listitemstyles
 }

src/gui/doc/snippets/textdocument-listitemstyles/main.cpp

@@ -49,6 +49,7 @@
 ****************************************************************************/
 
 #include <QtGui>
+#include <QApplication>
 
 #include "mainwindow.h"
 

src/gui/doc/snippets/textdocument-listitemstyles/mainwindow.cpp

@@ -47,11 +47,12 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
-
-#include <QtGui>
-
 #include "mainwindow.h"
 
+#include <QMenu>
+#include <QMenuBar>
+#include <QTextEdit>
+
 MainWindow::MainWindow()
 {
     QMenu *fileMenu = new QMenu(tr("&File"));

src/gui/doc/snippets/textdocument-listitemstyles/mainwindow.h

@@ -68,8 +68,8 @@ public slots:
 
 private:
     QString currentFile;
-    QTextEdit *editor;
-    QTextDocument *document;
+    QTextEdit *editor = nullptr;
+    QTextDocument *document = nullptr;
 };
 
 #endif

src/gui/doc/snippets/textdocument-listitemstyles/textdocument-listitemstyles.pro

@@ -1,3 +1,10 @@
-HEADERS     = mainwindow.h
-SOURCES     = main.cpp \
-              mainwindow.cpp
+TEMPLATE = lib
+TARGET = textdocument-listitemstyles
+QT += core gui widgets
+
+HEADERS = \
+    mainwindow.h
+
+SOURCES = \
+    main.cpp \
+    mainwindow.cpp