Doc: Compile GUI kernel snippets

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

Change-Id: I103a81a1a5acbfa1ece083a467d23a8544cf647a
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

@@ -13,4 +13,11 @@ SOURCES = \
     src_gui_image_qmovie.cpp \
     src_gui_image_qpixmapcache.cpp \
     src_gui_image_qpixmap.cpp \
-    src_gui_itemviews_qstandarditemmodel.cpp
+    src_gui_itemviews_qstandarditemmodel.cpp \
+    src_gui_kernel_qapplication.cpp \
+    src_gui_kernel_qclipboard.cpp \
+    src_gui_kernel_qevent.cpp \
+    src_gui_kernel_qguiapplication.cpp \
+    src_gui_kernel_qguiapplication_x11.cpp \
+    src_gui_kernel_qkeysequence.cpp \
+    src_gui_kernel_qshortcutmap.cpp

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

@@ -47,9 +47,28 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
+#include <QApplication>
+#include <QStyleFactory>
+#include <QWidget>
+
+
+namespace src_gui_kernel_qapplication {
+struct MyWidget
+{
+    QSize sizeHint() const;
+
+    int foo = 0;
+    MyWidget operator- (MyWidget& other)
+    {
+        MyWidget tmp = other;
+        return tmp;
+    };
+    int manhattanLength() { return 0; }
+};
+
 
 //! [0]
-QCoreApplication* createApplication(int &argc, char *argv[])
+QCoreApplication *createApplication(int &argc, char *argv[])
 {
     for (int i = 1; i < argc; ++i)
         if (!qstrcmp(argv[i], "-no-gui"))
@@ -57,7 +76,7 @@ QCoreApplication* createApplication(int &argc, char *argv[])
     return new QApplication(argc, argv);
 }
 
-int main(int argc, char* argv[])
+int main(int argc, char *argv[])
 {
     QScopedPointer<QCoreApplication> app(createApplication(argc, argv));
 
@@ -72,10 +91,13 @@ int main(int argc, char* argv[])
 //! [0]
 
 
+void wrapper0() {
+
 //! [1]
 QApplication::setStyle(QStyleFactory::create("fusion"));
 //! [1]
 
+} // wrapper0
 
 
 //! [3]
@@ -108,21 +130,38 @@ void updateAllWidgets()
 //! [5]
 
 
+void startTheDrag() {};
+void wrapper1() {
+MyWidget startPos;
+MyWidget currentPos;
+int x = 0;
+int y = 0;
+
 //! [6]
 if ((startPos - currentPos).manhattanLength() >=
         QApplication::startDragDistance())
     startTheDrag();
 //! [6]
 
+
 //! [7]
 QWidget *widget = qApp->widgetAt(x, y);
 if (widget)
     widget = widget->window();
 //! [7]
 
+} // wrapper1
+
+
+void wrapper2() {
+QPoint point;
 
 //! [8]
 QWidget *widget = qApp->widgetAt(point);
 if (widget)
     widget = widget->window();
 //! [8]
+
+
+} // wrapper2
+} // src_gui_kernel_qapplication

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

@@ -47,11 +47,21 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
+#include <QClipboard>
+#include <QGuiApplication>
+#include <QMimeData>
+
+namespace src_gui_kernel_qclipboard {
+void wrapper() {
+QString newText;
+QString image;
+QClipboard::Mode mode = QClipboard::Mode::Clipboard;
+
 
 //! [0]
 QClipboard *clipboard = QGuiApplication::clipboard();
 QString originalText = clipboard->text();
-...
+// etc.
 clipboard->setText(newText);
 //! [0]
 
@@ -61,3 +71,7 @@ QMimeData *data = new QMimeData;
 data->setImageData(image);
 clipboard->setMimeData(data, mode);
 //! [1]
+
+
+} // wrapper
+} // src_gui_kernel_qclipboard

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

@@ -47,6 +47,16 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
+#include <QWheelEvent>
+
+namespace src_gui_kernel_qevent {
+class MyWidget //: public QWidget
+{
+    void wheelEvent(QWheelEvent *event);
+    void scrollWithPixels(QPoint point);
+    void scrollWithDegrees(QPoint point);
+};
+
 
 //! [0]
 void MyWidget::wheelEvent(QWheelEvent *event)
@@ -64,3 +74,6 @@ void MyWidget::wheelEvent(QWheelEvent *event)
     event->accept();
 }
 //! [0]
+
+
+} // src_gui_kernel_qevent

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

@@ -47,13 +47,30 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
+#include <QApplication>
+#include <QMessageBox>
+#include <QSessionManager>
+#include <QWidget>
+
+namespace src_gui_kernel_qguiapplication {
+struct MyMainWidget : public QWidget
+{
+    MyMainWidget(QWidget *parent);
+    void commitData(QSessionManager& manager);
+    bool saveDocument() { return true; };
+    QStringList restartCommand() { return QStringList(); };
+    QStringList discardCommand() { return QStringList(); };
+};
+MyMainWidget *mainWindow = nullptr;
+void do_something(QString command) { Q_UNUSED(command); };
+MyMainWidget mySession(nullptr);
 
 //! [0]
 int main(int argc, char *argv[])
 {
     QApplication::setDesktopSettingsAware(false);
     QApplication app(argc, argv);
-    ...
+    // ...
     return app.exec();
 }
 //! [0]
@@ -61,7 +78,7 @@ int main(int argc, char *argv[])
 
 //! [1]
 MyMainWidget::MyMainWidget(QWidget *parent)
-    :QWidget(parent)
+    : QWidget(parent)
 {
     QGuiApplication::setFallbackSessionManagementEnabled(false);
     connect(qApp, &QGuiApplication::commitDataRequest,
@@ -97,10 +114,17 @@ void MyMainWidget::commitData(QSessionManager& manager)
 //! [1]
 
 
+/* wrap snippet 2
+
 //! [2]
 appname -session id
 //! [2]
 
+*/ // wrap snippet 2
+
+
+void wrapper0() {
+
 
 //! [3]
 const QStringList commands = mySession.restartCommand();
@@ -108,9 +132,16 @@ for (const QString &command : commands)
     do_something(command);
 //! [3]
 
+} // wrapper0
 
+
+void wrapper1() {
 //! [4]
 const QStringList commands = mySession.discardCommand();
 for (const QString &command : mySession.discardCommand())
     do_something(command);
 //! [4]
+
+
+} // wrapper1
+} // src_gui_kernel_qguiapplication

src/gui/doc/snippets/code/src_gui_kernel_qguiapplication_x11.cpp

@@ -47,9 +47,21 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
+#include <QCursor>
+#include <QGuiApplication>
+
+namespace src_gui_kernel_qguiapplication_x11 {
+void calculateHugeMandelbrot();
+
+void wrapper() {
+
 
 //! [0]
 QGuiApplication::setOverrideCursor(QCursor(Qt::WaitCursor));
 calculateHugeMandelbrot();              // lunch time...
 QGuiApplication::restoreOverrideCursor();
 //! [0]
+
+
+} // wrapper
+} // src_gui_kernel_qguiapplication_x11

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

@@ -47,6 +47,16 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
+#include <QKeySequence>
+#include <QMenu>
+#include <QTranslator>
+
+
+namespace src_gui_kernel_qkeysequence {
+struct Wrapper : public QWidget
+{ void wrapper(); };
+
+/* Wrap non-compilable code snippet
 
 //! [0]
 QKeySequence(QKeySequence::Print);
@@ -61,9 +71,14 @@ QKeySequence(tr("Ctrl+X, Ctrl+C"));
 QKeySequence(Qt::CTRL + Qt::Key_X, Qt::CTRL + Qt::Key_C);
 //! [1]
 
+*/ // Wrap non-compilable code snippet
 
+void Wrapper::wrapper() {
 //! [2]
 QMenu *file = new QMenu(this);
 file->addAction(tr("&Open..."), this, SLOT(open()),
                   QKeySequence(tr("Ctrl+O", "File|Open")));
 //! [2]
+
+} // Wrapper::wrapper
+} // src_gui_kernel_qkeysequence

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

@@ -47,7 +47,16 @@
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/
+#include <QKeySequence>
+
+namespace src_gui_kernel_qshortcutmap {
+
+void wrapper() {
+QKeySequence key;
 
 //! [0]
 key = QKeySequence();
 //! [0]
+
+} // wrapper
+} // src_gui_kernel_qshortcutmap