| 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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| 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation (qt-info@nokia.com)
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| 6 | **
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| 7 | ** This file is part of the documentation of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:FDL$
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| 10 | ** Commercial Usage
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| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 12 | ** accordance with the Qt Commercial License Agreement provided with the
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| 13 | ** Software or, alternatively, in accordance with the terms contained in a
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| 14 | ** written agreement between you and Nokia.
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| 15 | **
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| 16 | ** GNU Free Documentation License
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| 17 | ** Alternatively, this file may be used under the terms of the GNU Free
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| 18 | ** Documentation License version 1.3 as published by the Free Software
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| 19 | ** Foundation and appearing in the file included in the packaging of this
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| 20 | ** file.
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| 21 | **
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| 22 | ** If you have questions regarding the use of this file, please contact
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| 23 | ** Nokia at qt-info@nokia.com.
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| 24 | ** $QT_END_LICENSE$
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| 25 | **
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| 26 | ****************************************************************************/
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| 27 |
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| 28 | /*!
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| 29 | \page widgets-and-layouts.html
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| 30 | \title Widgets and Layouts
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| 31 | \ingroup qt-gui-concepts
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| 32 | \brief The primary elements for designing user interfaces in Qt.
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| 33 |
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| 34 | \section1 Widgets
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| 35 |
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| 36 | Widgets are the primary elements for creating user interfaces in Qt.
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| 37 | \l{The Widget Classes}{Widgets} can display data and status information,
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| 38 | receive user input, and provide a container for other widgets that
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| 39 | should be grouped together. A widget that is not embedded in a
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| 40 | parent widget is called a \l{Window and Dialog Widgets} {window}.
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| 41 |
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| 42 | \image parent-child-widgets.png A parent widget containing various child widgets.
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| 43 |
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| 44 | The QWidget class provides the basic capability to render to the
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| 45 | screen, and to handle user input events. All UI elements that Qt
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| 46 | provides are either subclasses of QWidget, or are used in connection
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| 47 | with a QWidget subclass. Creating custom widgets is done by
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| 48 | subclassing QWidget or a suitable subclass and reimplementing the
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| 49 | virtual event handlers.
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| 50 |
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| 51 | \section1 Layouts
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| 52 |
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| 53 | \l{Layout Management}{Layouts} are an elegant and flexible way to
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| 54 | automatically arrange child widgets within their container. Each
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| 55 | widget reports its size requirements to the layout through the
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| 56 | \l{QWidget::}{sizeHint} and \l{QWidget::}{sizePolicy} properties,
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| 57 | and the layout distributes the available space accordingly.
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| 58 |
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| 59 | \table
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| 60 | \row
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| 61 | \o \image qgridlayout-with-5-children.png
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| 62 | \o \image qformlayout-with-6-children.png
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| 63 | \endtable
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| 64 |
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| 65 | \l{Qt Designer Manual}{\QD} is a powerful tool for interactively creating and
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| 66 | arranging widgets in layouts.
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| 67 |
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| 68 | \section1 Widget Styles
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| 69 |
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| 70 | \l{Styles and Style Aware Widgets}{Styles} draw on behalf of
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| 71 | widgets and encapsulate the look and feel of a GUI. Qt's built-in
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| 72 | widgets use the QStyle class to perform nearly all of their drawing,
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| 73 | ensuring that they look exactly like the equivalent native widgets.
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| 74 |
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| 75 | \table
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| 76 | \row
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| 77 | \o \image windowsxp-tabwidget.png
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| 78 | \o \image plastique-tabwidget.png
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| 79 | \o \image macintosh-tabwidget.png
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| 80 | \endtable
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| 81 |
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| 82 | \l{Qt Style Sheets} are a powerful mechanism that allows you to customize the
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| 83 | appearance of widgets, in addition to what is already possible by subclassing QStyle.
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| 84 |
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| 85 | \section1 The Widget Classes
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| 86 |
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| 87 | The following sections list the widget classes. See the \l{Qt Widget
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| 88 | Gallery} for some examples.
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| 89 |
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| 90 | \section2 Basic Widgets
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| 91 |
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| 92 | These basic widgets (controls), e.g. buttons, comboboxes and
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| 93 | scroll bars, are designed for direct use.
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| 94 |
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| 95 | \table
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| 96 | \row
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| 97 | \o \image windows-label.png
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| 98 | \o \image windowsvista-pushbutton.png
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| 99 | \o \image gtk-progressbar.png
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| 100 | \row
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| 101 | \o \image plastique-combobox.png
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| 102 | \o \image macintosh-radiobutton.png
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| 103 | \o \image cde-lineedit.png
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| 104 | \endtable
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| 105 |
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| 106 | \annotatedlist basicwidgets
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| 107 |
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| 108 | \section2 Advanced Widgets
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| 109 |
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| 110 | Advanced GUI widgets, e.g. tab widgets and progress bars, provide
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| 111 | more complex user interface controls.
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| 112 |
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| 113 | \table
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| 114 | \row
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| 115 | \o \image windowsxp-treeview.png
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| 116 | \o \image gtk-calendarwidget.png
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| 117 | \o \image qundoview.png
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| 118 | \endtable
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| 119 |
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| 120 | \annotatedlist advanced
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| 121 |
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| 122 | \table
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| 123 | \row
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| 124 | \o \image windowsvista-tabwidget.png
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| 125 | \o \image macintosh-groupbox.png
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| 126 | \endtable
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| 127 |
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| 128 | \section2 Organizer Widgets
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| 129 |
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| 130 | Classes like splitters, tab bars, button groups, etc are used for
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| 131 | organizing and grouping GUI primitives into more complex
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| 132 | applications and dialogs.
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| 133 |
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| 134 | \annotatedlist organizers
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| 135 |
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| 136 | \section2 Abstract Widget Classes
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| 137 |
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| 138 | The abstract widget classes are base classes. They are not usable as
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| 139 | standalone classes but provide functionality when they are subclassed.
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| 140 |
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| 141 | \annotatedlist abstractwidgets
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| 142 | */
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| 143 |
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| 144 | /*!
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| 145 | \group advanced
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| 146 | \title Advanced Widgets
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| 147 | */
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| 148 |
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| 149 | /*!
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| 150 | \group abstractwidgets
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| 151 | \title Abstract Widget Classes
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| 152 | */
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| 153 |
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| 154 | /*!
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| 155 | \group basicwidgets
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| 156 | \title Basic Widgets
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| 157 | */
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| 158 |
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| 159 | /*!
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| 160 | \group organizers
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| 161 | \title Organizers
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| 162 | */
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