Qt Creator Plugin HOWTO documentation first and second cut

Signed-off-by: Abhishek Patil <abhishek.patil@vcreatelogic.com>

Merge-request: 145
Reviewed-by: con <qtc-committer@nokia.com>

doc/examples/menu/addingmenu/donothingplugin.cpp

@@ -0,0 +1,64 @@
+#include "donothingplugin.h"
+#include <coreplugin/coreconstants.h>
+#include <coreplugin/actionmanager/actionmanager.h>
+#include <coreplugin/actionmanager/command.h>
+#include <coreplugin/icore.h>
+#include <QKeySequence>
+
+#include <QtPlugin>
+#include <QStringList>
+#include <QMessageBox>
+
+DoNothingPlugin::DoNothingPlugin()
+{
+    // Do nothing
+}
+
+DoNothingPlugin::~DoNothingPlugin()
+{
+    // Do notning
+}
+
+void DoNothingPlugin::extensionsInitialized()
+{
+    // Do nothing
+}
+
+bool DoNothingPlugin::initialize(const QStringList& args, QString *errMsg)
+{
+    Q_UNUSED(args);
+    Q_UNUSED(errMsg);
+
+    // Fetch the action manager
+    Core::ActionManager* am = Core::ICore::instance()->actionManager();
+
+    // Create a DoNothing menu
+    Core::ActionContainer* ac = am->createMenu("DoNothingPlugin.DoNothingMenu");
+    ac->menu()->setTitle("DoNothing");
+
+    // Create a command for "About DoNothing".
+    QAction *action = new QAction(tr("About DoNothing"),this);
+    Core::Command* cmd = am->registerAction(action,"DoNothingPlugin.AboutDoNothing",QList<int>() << 0);
+
+    // Add DoNothing menu to the menubar
+    am->actionContainer(Core::Constants::MENU_BAR)->addMenu(ac);
+
+    // Add the "About DoNothing" action to the DoNothing menu
+    ac->addAction(cmd);
+
+    // Connect the action
+    connect(action, SIGNAL(triggered(bool)), this, SLOT(about()));
+    return true;
+}
+
+void DoNothingPlugin::shutdown()
+{
+    // Do nothing
+}
+void DoNothingPlugin::about()
+{
+    QMessageBox::information(0, "About DoNothing Plugin",
+                             "Seriously dude, this plugin does nothing");
+}
+
+Q_EXPORT_PLUGIN(DoNothingPlugin)