Kexi/Junior Jobs/Add d-pointers

maintainer of this task: staniek at kde.org
OPEN, DIFFICULTY=2/5
Recommended for Google Code-IN program

Goal

Improve internal APIs in Kexi. This can be done easily by introducing d-poitners to classes that lack them.

Introduction

Read section about d-pointers on Techbase (d-pointers only, not shared d-pointers).

Classes that have to be converted are in this form:

 // MyClass.h
 class MyClass {
 public:
  MyClass();
 private:
  Foo m_foo;
 };
 
 // MyClass.cpp
 MyClass::MyClass() {
  m_foo/doSomething();
 }

After converting to d-pointer it should be:

 // MyClass.h
 class MyClass {
 public:
  MyClass();
 private:
  class Private;
  Private * const d;
 };
 
 // MyClass.cpp
 class MyClass::Private {
 public:
  Private() 
  Foo foo;
 };
 
 MyClass::MyClass()
  : d(new Private)
 {
  d->foo.doSomething();
 }
 
 MyClass::~MyClass()
 {
  delete d;
 }

List of files

This list is not complete. If you're looking for more please contact the maintainer. Please prepend assigned items with with [assigned] tag and done items with [done] tag.

Extra tasks needed

After converting to d-pointer:

any code referring to m_foo attribute should be changed to d->foo
if there is inline code in header file that uses member variable, do not move the variable to d-pointer unless you know for sure it isn't there for optimization

Required skills

Basic Qt, average C++.

Work within a new branch kexi-dpointers-gci, please create.

Notes to mentor

This task can be naturally splited to many students but please have consistency in mind and note that you will need to somehow synchronize their work into a single branch
Please always emphasize importance of coding style to students and check that - it's so easier to maintain the style from day one instead of fixing afterwards. Show Techbase articles for that.
Take care of coding practices too (see Techbase articles)