Doc: Compile textdocument-tables snippets

Minor code cleanup in passing.

Task-number: QTBUG-81486
Change-Id: I23f8b3a22f627050582c69c81e5e0b85b5e45768
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>

src/gui/doc/snippets/snippets.pro

@@ -23,5 +23,6 @@ contains(QT_BUILD_PARTS, tests) {
         textdocument-lists \
         textdocument-printing \
         textdocument-resources \
-        textdocument-selections
+        textdocument-selections \
+        textdocument-tables
 }

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

@@ -47,11 +47,10 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
-
-#include <QtGui>
-
 #include "mainwindow.h"
 
+#include <QApplication>
+
 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);

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

@@ -131,9 +131,9 @@ MainWindow::MainWindow()
     }
 //! [8]
 
-    connect(saveAction, &QAction:triggered, this, &MainWindow::saveFile);
-    connect(quitAction, &QAction:triggered, this, &MainWindow::close);
-    connect(showTableAction, &QAction:triggered, this, &MainWindow::showTable);
+    connect(saveAction, &QAction::triggered, this, &MainWindow::saveFile);
+    connect(quitAction, &QAction::triggered, this, &MainWindow::close);
+    connect(showTableAction, &QAction::triggered, this, &MainWindow::showTable);
 
     setCentralWidget(editor);
     setWindowTitle(tr("Text Document Tables"));

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

@@ -47,7 +47,6 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
-
 #ifndef WINDOW_H
 #define WINDOW_H
 
@@ -69,7 +68,7 @@ public slots:
 private:
     bool writeXml(const QString &fileName);
 
-    QTextEdit *editor;
+    QTextEdit *editor = nullptr;
 };
 
 #endif

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

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