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authorKavindra Devi Palaraja <kavindra.palaraja@nokia.com>2009-04-02 08:42:23 (GMT)
committerKavindra Devi Palaraja <kavindra.palaraja@nokia.com>2009-04-02 08:42:32 (GMT)
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-/****************************************************************************
-**
-** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
-**
-** This file is part of the documentation of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** No Commercial Usage
-** This file contains pre-release code and may not be distributed.
-** You may use this file in accordance with the terms and conditions
-** contained in the either Technology Preview License Agreement or the
-** Beta Release License Agreement.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
-** package.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 3.0 as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU General Public License version 3.0 requirements will be
-** met: http://www.gnu.org/copyleft/gpl.html.
-**
-** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-/*!
- \page tutorials-addressbook-sdk.html
-
- \startpage {index.html}{Qt Reference Documentation}
- \nextpage \l{Designing the User Interface}{Chapter 1}
-
- \title Address Book Tutorial
- \ingroup howto
- \ingroup tutorials
- \brief An introduction to GUI programming with Qt and Qt Creator,
- describing in detail how to put together a simple yet fully-
- functioning application.
-
- This tutorial gives an introduction to GUI programming using the Qt SDK.
-
- ### Screenshot
-
- In the process, we will learn about some basic technologies provided by
- Qt, such as:
-
- \list
- \o Widgets and layout managers
- \o Container classes
- \o Signals and slots
- \o Input and output devices
- \endlist
-
- If you are completely new to Qt, please read \l{How to Learn Qt} if you
- have not already done so.
-
- The tutorial's source code is located in Qt's
- \c{examples/tutorials/addressbook} directory.
-
- Tutorial chapters:
-
- \list 1
- \o \l{Designing the User Interface}
- \o \l{Adding Addresses}
- \o \l{Navigating between Entries}
- \o \l{Editing and Removing Addresses}
- \o \l{Adding a Find Function}
- \o \l{Loading and Saving}
- \o \l{Additional Features}
- \endlist
-
- Although this little application does not look much like a fully-fledged
- modern GUI application, it uses many of the basic techniques that are used
- in more complex applications. After you have worked through it, we
- recommend checking out the \l{mainwindows/application}{Application}
- example, which presents a small GUI application, with menus, toolbars, a
- status bar, and so on.
-*/
-
-
-/*!
- \page tutorials-addressbook-sdk-part1.html
- \contentspage {Address Book Tutorial}{Contents}
- \nextpage \l{Adding Addresses}{Chapter 2}
- \title Address Book 1 - Designing the User Interface
-
- The first part of this tutorial covers the design of the basic graphical
- user interface (GUI) we use for the Address Book application.
-
- The first step to creating a GUI program is to design the user interface.
- In this chapter, our goal is to set up the labels and input fields needed
- to implement a basic address book application. The figure below is a
- screenshot of our expected output.
-
- \image addressbook-tutorial-part1-screenshot.png
-
- We begin by launching Qt Creator and use it to generate a new project. To
- do this, select \gui New from the \gui File menu. In the
- \gui{New File or Project} dialog. Follow the step by step guide on how to
- create a \gui Project with Qt Creator, refer to the document
- \l{Creating a Project in Qt Creator}{here}. Ensure that you select QWidget
- as your subclass and name it \c AddressBook.
-
- There are five files generated in this \gui{Project}:
-
- \list
- \o \c{addressbook.pro} - the project file,
- \o \c{addressbook.h} - the definition file for the \c AddressBook
- class,
- \o \c{addressbook.cpp} - the implementation file for the
- \c AddressBook class,
- \o \c{main.cpp} - the file containing a \c main() function, with an
- instance of \c AddressBook, and
- \o \c{addressbook.ui} - the user interface file created with \QD.
- \endlist
-
- Now we have all the files we need, let's move on to designing the user
- interface.
-
- \section1 Placing the Widgets on the Form
-
- In the \gui{Project Sidebar}, double-click on the \c{addressbook.ui} file.
- The \QD plugin will be launched, allowing you to design your program's user
- interface.
-
- We require two \l{QLabel}s to label the input fields as well as a
- QLineEdit and a QTextEdit as the input fields. So, drag those widgets from
- the \gui{Widget Box} to your form. In the \gui{Property Editor}, set their
- \gui{objectName} property to \c nameLabel and \c addressLabel for the
- \l{QLabel}s, \c nameLine for the QLineEdit and finally, \c addressText for
- the QTextEdit.
-
- Next, we have to position the widgets properly, according to the screenshot
- earlier. We use a QGridLayout to position our labels and input fields in a
- structured manner. QGridLayout divides the available space into a grid and
- places widgets in the cells we specify with row and column numbers. The
- diagram below shows the layout cells and the position of our widgets.
-
- \image addressbook-tutorial-part1-labeled-screenshot.png
-
-
- \section1 Qt Programming - Subclassing
-
- When writing Qt programs, we usually subclass Qt objects to add
- functionality. This is one of the essential concepts behind creating custom
- widgets or collections of standard widgets. Subclassing to extend or change
- the behavior of a widget has the following advantages:
-
- \list
- \o We can write implementations of virtual or pure virtual functions
- to obtain exactly what we need, falling back on the base class's
- implementation when necessary.
- \o It allows us to encapsulate parts of the user interface within a
- class, so that the other parts of the application do not need to
- know about the individual widgets in the user interface.
- \o The subclass can be used to create multiple custom widgets in the
- same application or library, and the code for the subclass can be
- reused in other projects.
- \endlist
-
-
-
-
-*/