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diff --git a/examples/widgets/doc/src/simplewidgetmapper.qdoc b/examples/widgets/doc/src/simplewidgetmapper.qdoc deleted file mode 100644 index c427dc6542..0000000000 --- a/examples/widgets/doc/src/simplewidgetmapper.qdoc +++ /dev/null @@ -1,125 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the documentation of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:FDL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Free Documentation License Usage -** 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. Please review the following information to ensure -** the GNU Free Documentation License version 1.3 requirements -** will be met: https://www.gnu.org/licenses/fdl-1.3.html. -** $QT_END_LICENSE$ -** -****************************************************************************/ - -/*! - \example itemviews/simplewidgetmapper - \title Simple Widget Mapper Example - \ingroup examples-itemviews - \brief The Simple Widget Mapper example shows how to use a widget mapper to display - data from a model in a collection of widgets. - - \image simplewidgetmapper-example.png - - The QDataWidgetMapper class allows information obtained from a - \l{Model Classes}{model} to be viewed and edited in a collection of - widgets instead of in an \l{View Classes}{item view}. - Any model derived from QAbstractItemModel can be used as the source of - data and almost any input widget can be used to display it. - - The example itself is very simple: we create \c Window, a QWidget subclass - that we use to hold the widgets used to present the data, and show it. The - \c Window class will provide buttons that the user can click to show - different records from the model. - - \section1 Window Class Definition - - The class provides a constructor, a slot to keep the buttons up to date, - and a private function to set up the model: - - \snippet itemviews/simplewidgetmapper/window.h Window definition - - In addition to the QDataWidgetMapper object and the controls used to make - up the user interface, we use a QStandardItemModel to hold our data. - We could use a custom model, but this standard implementation is sufficient - for our purposes. - - \section1 Window Class Implementation - - The constructor of the \c Window class can be explained in three parts. - In the first part, we set up the widgets used for the user interface: - - \snippet itemviews/simplewidgetmapper/window.cpp Set up widgets - - We also set up the buddy relationships between various labels and the - corresponding input widgets. - - Next, we set up the widget mapper, relating each input widget to a column - in the model specified by the call to \l{QDataWidgetMapper::}{setModel()}: - - \snippet itemviews/simplewidgetmapper/window.cpp Set up the mapper - - We also connect the mapper to the \uicontrol{Next} and \uicontrol{Previous} buttons - via its \l{QDataWidgetMapper::}{toNext()} and - \l{QDataWidgetMapper::}{toPrevious()} slots. The mapper's - \l{QDataWidgetMapper::}{currentIndexChanged()} signal is connected to the - \c{updateButtons()} slot in the window which we'll show later. - - In the final part of the constructor, we set up the layout, placing each - of the widgets in a grid (we could also use a QFormLayout for this): - - \snippet itemviews/simplewidgetmapper/window.cpp Set up the layout - - Lastly, we set the window title and initialize the mapper by setting it to - refer to the first row in the model. - - The model is initialized in the window's \c{setupModel()} function. Here, - we create a standard model with 5 rows and 3 columns, and we insert some - sample names, addresses and ages into each row: - - \snippet itemviews/simplewidgetmapper/window.cpp Set up the model - - As a result, each row can be treated like a record in a database, and the - widget mapper will read the data from each row, using the column numbers - specified earlier to access the correct data for each widget. This is - shown in the following diagram: - - \image widgetmapper-simple-mapping.png - - Since the user can navigate using the buttons in the user interface, the - example is fully-functional at this point, but to make it a bit more - user-friendly, we implement the \c{updateButtons()} slot to show when the - user is viewing the first or last records: - - \snippet itemviews/simplewidgetmapper/window.cpp Slot for updating the buttons - - If the mapper is referring to the first row in the model, the \uicontrol{Previous} - button is disabled. Similarly, the \uicontrol{Next} button is disabled if the - mapper reaches the last row in the model. - - \section1 More Complex Mappings - - The QDataWidgetMapper class makes it easy to relate information from a - model to widgets in a user interface. However, it is sometimes necessary - to use input widgets which offer choices to the user, such as QComboBox, - in conjunction with a widget mapper. - - In these situations, although the mapping to input widgets remains simple, - more work needs to be done to expose additional data to the widget mapper. - This is covered by the \l{Combo Widget Mapper Example}{Combo Widget Mapper} - and \l{SQL Widget Mapper Example}{SQL Widget Mapper} - examples. -*/ |