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drawdemo | 13 years ago | |
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extension | 13 years ago | |
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fonts | 13 years ago | |
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README
This examples directory contains lots of Qt examples. And there are additional examples in ../tools/designer/examples/ and in the extensions subdirectories. The documentation contains two detailed Qt tutorials and additional tutorials for Qt Designer. The examples here are useful for learning particular Qt classes and techniques, but to learn Qt itself we recommend starting with the documentation's short "How to Learn Qt" document. It is best to run each example from its own directory since some of them assume they are run from there. aclock This example displays an analog clock widget. It shows how to create a custom widget (QWidget subclass) and how to create a timer using QTimer. action A single document interface application example with a menu bar, tool bar and status bar that provides simple text editing. It shows how to implement a typical modern application, how to create a QMainWindow subclass, and how to create actions that can be assigned to menus (QPopupMenu) and toolbars (QToolBar) using QAction. It also shows how to print using QSimpleRichText. addressbook [obsolete] application [obsolete; see the action example instead] biff [Unix-specific] Biff is a simple graphical program to indicate whether there is new mail; it looks like xbiff but is much shorter. buttongroups This examples shows different types of group boxes (QButtonGroup, and QGroupBox), and different kinds of buttons (QCheckBox, QRadioButton, and QPushButton). It also shows how to add a QPopupMenu to a button. canvas This examples demonstrates many of QCanvasView's facilities, but by no means all of them. It uses QCanvasItem, QCanvasLine, QCanvasRectangle, QCanvasEllipse, QCanvasSprite, and of course QCanvas. chart An application for maintaining simple numeric data and visualising the data using pie and bar charts. Tutorial #2 explains this application in detail. checklists Shows two list views with check box and radio button items. (These kinds of lists are often used with setup programs.) Shows the use of QListView, QListViewItem, QCheckListItem, QListViewItemIterator, and QValueList. cursor This example shows how to set the mouse cursor for a widget. Shows Qt's cursors and a custom cursor using QLabel and QCursor. customlayout This examples demonstrates how to write a customized layout (geometry) manager, like a Card-Layout, Border-Layout and Flow-Layout. dclock This example displays a digital LCD clock and can switch between time and date. It uses the QLCDNumber widget and a couple of QTimers. demo Run this to see almost all of Qt's widgets in action, including drag and drop, 2D graphics, etc. desktop The desktop demo contains three routines, each of which draws something on the desktop. It does some nice stuff with QPainter, and also demonstrates how one can treat the desktop as a widget like any other. directpainter [Qt/Embedded-specific] Shows the use of QDirectPainter. dirview This example program demonstrates how to use a QListView and QListViewItems to build a multi-column hierarchical, memory- and CPU-efficient directory browser. It also demonstrates how to use Drag'n'Drop in a QListview. (See also the fileiconview example.) distributor This is a utility program that can be used to modify the paths used in the Qt library binary to make the binary suitable for distribution. For experts only. dragdrop Demonstrates image and text drag and drop. drawdemo Draws a color wheel, text and shapes. This example demonstrates several drawing functions and printer output using QPainter, QWMatrix, QFont, QFontMetrics, QColor, QBrush, and QPrinter. You can easily add you own drawing functions. See "ourDrawFunctions". drawlines This example shows very simple mouse-based user interaction and painting without any world transform matrix or other advanced features. Run the program, click the button, move the mouse, release the button, and watch the lines get drawn. extension An extension dialog with simple and advanced appearances controlled by a toggle button. fileiconview This example partially implements a very basic file manager using a widget derived from QIconView to display the current directory. It uses the DirectoryView widget from the dirview example to display the directory tree. It also shows how to add a QComboBox to a QToolBar and how to implement a context menu using QPopupMenu. fonts [obsolete; see the qfd example instead] forever WARNING: this program has a strobe effect. See how fast Qt can draw colored rectangles. This example continuously draws rectangles in a window and has another widget that counts the number of rectangles that are drawn per second. gridview A QGridView with 100x100 cells. hello Hello world with colored animated wavy text. helpdemo Shows how to use Qt Assistant as an application's online help tool. (See also the helpsystem example.) helpsystem This example shows how to implement context-sensitive help in various ways in a Qt application using QToolTip, QWhatsThis, and QAssistantClient to control Qt Assistant. helpviewer The HelpViewer example implements a simple HTML help browser using Qt's richtext capabilities. i18n This example shows how to internationalize applications. Start it with ./i18n en to run the application in English, and with ./i18n de to run it in German. Other languages are also available including, Arabic (ar), French (fr), Italian (it), Japanese (jp), Korean (ko), Norwegian (no), and Russian (ru). Some languages depend on the availability of suitable fonts. iconview This example implements a flexible icon view which can store lots of icon items. It supports Drag'n'Drop and different selection modes using QIconView. kiosk [Qt/Embedded-specific] An MPEG player. launcher [Qt/Embedded-specific] A program launcher. layout [obsolete] This example shows simple and intermediate use of Qt's layout classes, QGridLaout, QBoxLayout etc. life An implementation of the life game with a Unix-flavor GUI. lineedits This example shows how to use various properties of QLineEdit including echo modes, input masks, and validators. listbox Shows QListBox options. listboxcombo This example shows how to use QListBox (with single selection and multi selection) and QComboBox (editable and non-editable). listviews This examples shows how to work with QListView (a tree view widget) mdi Similar to the action example, but this time using MDI (Multiple Document Interface). It subclasses QMainWindow and uses the QWorkspace class to provide MDI and shows how to implement an MDI Window menu. menu This example demonstrates the simple use of menus (a menu bar and pull-down menus), and a context menu. (See also the popup example.) movies The Movies example displays animated GIF files using the QMovie and QLabel classes. network/archivesearch Shows how to use QHttp to request and receive data from a web site. network/clientserver Provides a client application and a server application that communicate using QSocket and QServerSocket. network/ftpclient A simple FTP client that uses QFtp to retrieve directory listings and to download and upload files. network/httpd An extremely simple HTTP daemon built using QServerSocket. network/infoprotocol A more complex client/server example. network/mail A simple mail client that can send email using the QSocket class. network/networkprotocol A simple implementation of a subset of the NNTP protocol. This shows how to implement your own network protocols by subclassing QNetworkProtocol. network/remotecontrol Controlling one application from another using QSocket-based IPC. opengl/box Shows how to use OpenGL in Qt using QGLWidget. opengl/gear Shows how to build OpenGL display lists. opengl/glpixmap This is based on the box example. It shows how to render an OpenGL scene into a QPixmap. opengl/overlay Demonstrates the use of OpenGL overlays (where supported). opengl/sharedbox Demonstrates how to share OpenGL display lists with QGLWidgets. opengl/texture Shows how to use OpenGL textures. picture This example shows how to make, store to file, and read back, a picture as a set of vector drawing commands. popup This examples shows how to implement popup widgets. process Shows how to execute a non-GUI application in a separate process with I/O redirection. progress WARNING: this program has a strobe effect. This example presents a long-running process (drawing lots of rectangles) and a QProgressDialog. Two types of progress dialog are offered, one that simply shows text, and a custom one that shows an animation using a QLabel and a QTimer. progressbar Shows how to use a QProgressBar. qdir Shows how to use and customize QFileDialog. Run qdir --help for details. Also shows QFileInfo. qfd This example program displays all the characters of a selected font. It shows the use of QFontDialog, QFontMetrics and QFontInfo, and a QTable subclass. qmag This is a simple magnifier-type program. It shows how one can do some quite low-level operations portably using Qt. qwerty Simple text editor for testing different character encodings. rangecontrols This examples shows how to use QSpinBox and QSlider. regexptester This little application is useful for testing regular expressions. richtext This example shows the use of QTextView (a read/only QTextEdit subclass). rot13 A simple implementation of the rot13 algorithm. scribble An implementation of the well known scribble program. You can draw with different pen colors and widths and save the result as a pixmap in various formats. It shows how to do drawing using a QWidget subclass (rather than a QCanvas for example). It also shows how to add a QSpinBox to a QToolBar and how to implement a button that pops up a menu (using QPushButton and QPopupMenu), and also how to use the QColorDialog. scrollview This example shows one way of using a QScrollview. This widget is highly optimized for showing very large contents including child widgets. showimg This example reads and displays an image in any supported image format (GIF, BMP, PPM, XMP, etc.) sound Shows how to play sounds from a Qt application (and how to see if sound is supported) using QSound. splitter This example shows how to use QSplitter to give the user control over how much vertical or horizontal space is given to child widgets. sql/blob Shows how to connect to a database and how to write to and read BLOB fields (for those databases that support BLOBs). sql/overview [to be withdrawn] This is just a series of tiny examples used by the SQL module overview (sql.html). sql/sqltable A very simple example that shows how to relate a database table to a QDataTable. tabdialog This example shows how to use a dialog with multiple tabs (pages). It shows the use of QTabDialog and QFileInfo. table/bigtable This shows how to create a sparse very large (1M x 1M cells) QTable by avoiding the use of table items. table/small-table-demo A small, simple QTable example that uses QTableItems to show text and pixmaps, and QComboTableItems and QCheckTableItems to show how they work. table/statistics A QTable example that shows how to subclass QTableItem. tablet This shows how to interact with a tablet device. It will only run if a compatible tablet is installed. tetrix This is the Qt implementation of the well known game Tetris, but with an unusual twist, not to mention a comment that's almost a work of art. textedit A simple text editor based on QTextEdit. themes This examples demonstrates how to draw widgets in different styles (themes). Example themes looking like wood and metal are implemented. You can switch between the different styles at runtime using the menu. Shows how to create a QStyle subclass. Not for the faint-hearted. tictac This is an implementation of the Tic-Tac-Toe game. tooltip This example widget demonstrates how to use tool tips for static and dynamic regions within a widget using a QToolTip subclass. toplevel This program allows you to set all the flags for a widget and then displays the widget using the flags. trayicon [work in progress] tux Shows how to create a non-rectangular window. widgets Shows many Qt widgets (See also the demo example). wizard This example shows how to use QWizard. xform Demonstrates how to arbitrarily rotate, shear and scale text and graphics using QWMatrix. xml/outliner Shows how to read in an XML file using Qt's DOM classes and display the data in a list view. xml/tagreader Shows how to read an XML file using Qt's SAX classes. xml/tagreader-with-features Shows how to read an XML file using Qt's SAX classes, and displays the data showing the effects of different feature settings.