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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
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** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
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** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
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** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\example dialogs/classwizard
\title Class Wizard Example
The License Wizard example shows how to implement linear
wizards using QWizard.
\image classwizard.png Screenshot of the Class Wizard example
Most wizards have a linear structure, with page 1 followed by
page 2 and so on until the last page. Some wizards are more
complex in that they allow different traversal paths based on the
information provided by the user. The
\l{dialogs/licensewizard}{License Wizard} example shows how to
create such wizards.
The Class Wizard example consists of the following classes:
\list
\o \c ClassWizard inherits QWizard and provides a
three-step wizard that generates the skeleton of a C++ class
based on the user's input.
\o \c IntroPage, \c ClassInfoPage, \c CodeStylePage, \c
OutputFilesPage, and \c ConclusionPage are QWizardPage
subclasses that implement the wizard pages.
\endlist
\section1 ClassWizard Class Definition
\image classwizard-flow.png The Class Wizard pages
We will see how to subclass QWizard to implement our own wizard.
The concrete wizard class is called \c ClassWizard and provides
five pages:
\list
\o The first page is an introduction page, telling the user what
the wizard is going to do.
\o The second page asks for a class name and a base class, and
allows the user to specify whether the class should have a \c
Q_OBJECT macro and what constructors it should provide.
\o The third page allows the user to set some options related to the code
style, such as the macro used to protect the header file from
multiple inclusion (e.g., \c MYDIALOG_H).
\o The fourth page allows the user to specify the names of the
output files.
\o The fifth page is a conclusion page.
\endlist
Although the program is just an example, if you press \gui Finish
(\gui Done on Mac OS X), actual C++ source files will actually be
generated.
\section1 The ClassWizard Class
Here's the \c ClassWizard definition:
\snippet examples/dialogs/classwizard/classwizard.h 0
The class reimplements QDialog's \l{QDialog::}{accept()} slot.
This slot is called when the user clicks \gui{Finish}.
Here's the constructor:
\snippet examples/dialogs/classwizard/classwizard.cpp 1
We instantiate the five pages and insert them into the wizard
using QWizard::addPage(). The order in which they are inserted
is also the order in which they will be shown later on.
We call QWizard::setPixmap() to set the banner and the
background pixmaps for all pages. The banner is used as a
background for the page header when the wizard's style is
\l{QWizard::}{ModernStyle}; the background is used as the
dialog's background in \l{QWizard::}{MacStyle}. (See \l{Elements
of a Wizard Page} for more information.)
\snippet examples/dialogs/classwizard/classwizard.cpp 3
\snippet examples/dialogs/classwizard/classwizard.cpp 4
\dots
\snippet examples/dialogs/classwizard/classwizard.cpp 5
\snippet examples/dialogs/classwizard/classwizard.cpp 6
If the user clicks \gui Finish, we extract the information from
the various pages using QWizard::field() and generate the files.
The code is long and tedious (and has barely anything to do with
noble art of designing wizards), so most of it is skipped here.
See the actual example in the Qt distribution for the details if
you're curious.
\section1 The IntroPage Class
The pages are defined in \c classwizard.h and implemented in \c
classwizard.cpp, together with \c ClassWizard. We will start with
the easiest page:
\snippet examples/dialogs/classwizard/classwizard.h 1
\codeline
\snippet examples/dialogs/classwizard/classwizard.cpp 7
A page inherits from QWizardPage. We set a
\l{QWizardPage::}{title} and a
\l{QWizard::WatermarkPixmap}{watermark pixmap}. By not setting
any \l{QWizardPage::}{subTitle}, we ensure that no header is
displayed for this page. (On Windows, it is customary for wizards
to display a watermark pixmap on the first and last pages, and to
have a header on the other pages.)
Then we create a QLabel and add it to a layout.
\section1 The ClassInfoPage Class
The second page is defined and implemented as follows:
\snippet examples/dialogs/classwizard/classwizard.h 2
\codeline
\snippet examples/dialogs/classwizard/classwizard.cpp 9
\dots
\snippet examples/dialogs/classwizard/classwizard.cpp 12
\dots
\snippet examples/dialogs/classwizard/classwizard.cpp 13
First, we set the page's \l{QWizardPage::}{title},
\l{QWizardPage::}{subTitle}, and \l{QWizard::LogoPixmap}{logo
pixmap}. The logo pixmap is displayed in the page's header in
\l{QWizard::}{ClassicStyle} and \l{QWizard::}{ModernStyle}.
Then we create the child widgets, create \l{Registering and Using
Fields}{wizard fields} associated with them, and put them into
layouts. The \c className field is created with an asterisk (\c
*) next to its name. This makes it a \l{mandatory field}, that
is, a field that must be filled before the user can press the
\gui Next button (\gui Continue on Mac OS X). The fields' values
can be accessed from any other page using QWizardPage::field(),
or from the wizard code using QWizard::field().
\section1 The CodeStylePage Class
The third page is defined and implemented as follows:
\snippet examples/dialogs/classwizard/classwizard.h 3
\codeline
\snippet examples/dialogs/classwizard/classwizard.cpp 14
\dots
\snippet examples/dialogs/classwizard/classwizard.cpp 15
\codeline
\snippet examples/dialogs/classwizard/classwizard.cpp 16
The code in the constructor is very similar to what we did for \c
ClassInfoPage, so we skipped most of it.
The \c initializePage() function is what makes this class
interesting. It is reimplemented from QWizardPage and is used to
initialize some of the page's fields with values from the
previous page (namely, \c className and \c baseClass). For
example, if the class name on page 2 is \c SuperDuperWidget, the
default macro name on page 3 is \c SUPERDUPERWIDGET_H.
The \c OutputFilesPage and \c ConclusionPage classes are very
similar to \c CodeStylePage, so we won't review them here.
\sa QWizard, {License Wizard Example}, {Trivial Wizard Example}
*/
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