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-/****************************************************************************
-**
-** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/
-**
-** This file is part of the documentation of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:FDL$
-** GNU Free Documentation License
-** Alternatively, this file may be used under the terms of the GNU Free
-** Documentation License version 1.3 as published by the Free Software
-** Foundation and appearing in the file included in the packaging of
-** this file.
-**
-** Other Usage
-** Alternatively, this file may be used in accordance with the terms
-** and conditions contained in a signed written agreement between you
-** and Nokia.
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-/*!
- \example tools/treemodelcompleter
- \title Tree Model Completer Example
-
- The Tree Model Completer example shows how to provide completion
- facilities for a hierarchical model, using a period as the separator
- to access Child, GrandChild and GrandGrandChild level objects.
-
- \image treemodelcompleter-example.png
-
- Similar to the \l{Completer Example}, we provide QComboBox objects to
- enable selection for completion mode and case sensitivity, as well as
- a QCheckBox for wrap completions.
-
- \section1 The Resource File
-
- The contents of the TreeModelCompleter is read from \e treemodel.txt.
- This file is embedded within the \e treemodelcompleter.qrc resource file,
- which contains the following:
-
- \quotefile examples/tools/treemodelcompleter/treemodelcompleter.qrc
-
- \section1 TreeModelCompleter Class Definition
-
- The \c TreeModelCompleter is a subclass of QCompleter with two
- constructors - one with \a parent as an argument and another with
- \a parent and \a model as arguments.
-
- \snippet examples/tools/treemodelcompleter/treemodelcompleter.h 0
-
- The class reimplements the protected functions
- \l{QCompleter::splitPath()}{splitPath()} and
- \l{QCompleter::pathFromIndex()}{pathFromIndex()} to suit a tree model.
- For more information on customizing QCompleter to suit tree models, refer
- to \l{QCompleter#Handling Tree Models}{Handling Tree Models}.
-
- \c TreeModelCompleter also has a separator property which is declared
- using the Q_PROPERTY() macro. The separator has READ and WRITE attributes
- and the corresponding functions \c separator() and \c setSeparator(). For
- more information on Q_PROPERTY(), refer to \l{Qt's Property System}.
-
- \section1 TreeModelCompleter Class Implementation
-
- The first constructor constructs a \c TreeModelCompleter object with a
- parent while the second constructor constructs an object with a parent
- and a QAbstractItemModel, \a model.
-
- \snippet examples/tools/treemodelcompleter/treemodelcompleter.cpp 0
- \codeline
- \snippet examples/tools/treemodelcompleter/treemodelcompleter.cpp 1
-
- The \c separator() function is a getter function that returns the
- separator string.
-
- \snippet examples/tools/treemodelcompleter/treemodelcompleter.cpp 2
-
- As mentioned earlier, the \c splitPath() function is reimplemented because
- the default implementation is more suited to QDirModel or list models. In
- order for QCompleter to split the path into a list of strings that are
- matched at each level, we split it using QString::split() with \c sep as its
- separator.
-
- \snippet examples/tools/treemodelcompleter/treemodelcompleter.cpp 3
-
- The \c pathFromIndex() function returns data for the completionRole() for a
- tree model. This function is reimplemented as its default implementation is
- more suitable for list models. If there is no separator, we use
- \l{QCompleter}'s default implementation, otherwise we use the
- \l{QStringList::prepend()}{prepend()} function to navigate upwards and
- accumulate the data. The function then returns a QStringList, \c dataList,
- using a separator to join objects of different levels.
-
- \snippet examples/tools/treemodelcompleter/treemodelcompleter.cpp 4
-
- \section1 MainWindow Class Definition
-
- The \c MainWindow class is a subclass of QMainWindow and implements five
- custom slots: \c about(), \c changeCase(), \c changeMode(),
- \c highlight(), and \c updateContentsLabel().
-
- \snippet examples/tools/treemodelcompleter/mainwindow.h 0
-
- In addition, the class has two private functions, \c createMenu() and
- \c modelFromFile(), as well as private instances of QTreeView, QComboBox,
- QLabel, \c TreeModelCompleter and QLineEdit.
-
- \snippet examples/tools/treemodelcompleter/mainwindow.h 1
-
- \section1 MainWindow Class Implementation
-
- The \c{MainWindow}'s constructor creates a \c MainWindow object with a
- parent and initializes the \c completer and \c lineEdit. The
- \c createMenu() function is invoked to set up the "File" menu and "Help"
- menu. The \c{completer}'s model is set to the QAbstractItemModel obtained
- from \c modelFromFile(), and the \l{QCompleter::highlighted()}
- {highlighted()} signal is connected to \c{MainWindow}'s \c highlight()
- slot.
-
- \snippet examples/tools/treemodelcompleter/mainwindow.cpp 0
-
- The QLabel objects \c modelLabel, \c modeLabel and \c caseLabel are
- instantiated. Also, the QComboBox objects, \c modeCombo and \c caseCombo,
- are instantiated and populated. By default, the \c{completer}'s mode is
- "Filtered Popup" and the case is insensitive.
-
- \snippet examples/tools/treemodelcompleter/mainwindow.cpp 1
- \codeline
- \snippet examples/tools/treemodelcompleter/mainwindow.cpp 2
-
- We use a QGridLayout to place all the objects in the \c MainWindow.
-
- \snippet examples/tools/treemodelcompleter/mainwindow.cpp 3
-
- The \c createMenu() function sets up the QAction objects required and
- adds them to the "File" menu and "Help" menu. The
- \l{QAction::triggered()}{triggered()} signals from these actions are
- connected to their respective slots.
-
- \snippet examples/tools/treemodelcompleter/mainwindow.cpp 4
-
- The \c changeMode() function accepts an \a index corresponding to the
- user's choice of completion mode and changes the \c{completer}'s mode
- accordingly.
-
- \snippet examples/tools/treemodelcompleter/mainwindow.cpp 5
-
- The \c about() function provides a brief description on the Tree Model
- Completer example.
-
- \snippet examples/tools/treemodelcompleter/mainwindow.cpp 6
-
- The \c changeCase() function alternates between \l{Qt::CaseSensitive}
- {Case Sensitive} and \l{Qt::CaseInsensitive}{Case Insensitive} modes,
- depending on the value of \a cs.
-
- \snippet examples/tools/treemodelcompleter/mainwindow.cpp 7
-
- \section1 \c main() Function
-
- The \c main() function instantiates \c MainWindow and invokes the
- \l{QWidget::show()}{show()} function to display it.
-
- \snippet examples/tools/treemodelcompleter/main.cpp 0
-*/