Brush up the taskmenuextension example

When porting the code to Python, some issues showed up.

- Rewrite cellRect() to take the position (reason being
  that porting the existing code to Python creates
  problems with implicit conversion to float in the division).
- Use plain assignment by operator[] to replace the characters
  in the string
- Avoid repeating return types.
- Streamline code.
- Initialize myState member variable.
- Indicate C++ in the tool tip

Task-number: PYSIDE-1455
Change-Id: I62fa61eebaa2eefe8db0842d6a3789bd7cd4257e
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/examples/designer/taskmenuextension/tictactoeplugin.cpp b/examples/designer/taskmenuextension/tictactoeplugin.cpp
index 45075fe62..5515526bc 100644
--- a/examples/designer/taskmenuextension/tictactoeplugin.cpp
+++ b/examples/designer/taskmenuextension/tictactoeplugin.cpp
@@ -74,7 +74,7 @@ QString TicTacToePlugin::group() const
 
 QString TicTacToePlugin::toolTip() const
 {
-    return QString();
+    return QStringLiteral("Tic Tac Toe Example, demonstrating class QDesignerTaskMenuExtension (C++)");
 }
 
 QString TicTacToePlugin::whatsThis() const