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1%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2%% Name: tsamples.tex
3%% Purpose: Samples description
4%% Author: Vadim Zeitlin
5%% Modified by:
6%% Created: 02.11.99
7%% RCS-ID: $Id$
fc2171bd 8%% Copyright: (c) wxWidgets team
8795498c 9%% License: wxWindows license
eb91c0be 10%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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11% NB: please keep the subsections in alphabetic order!
12
fc2171bd 13\section{wxWidgets samples}\label{samples}
eb91c0be 14
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15Probably the best way to learn wxWidgets is by reading the source of some 50+
16samples provided with it. Many aspects of wxWidgets programming can be learnt
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17from them, but sometimes it is not simple to just choose the right sample to
18look at. This overview aims at describing what each sample does/demonstrates to
19make it easier to find the relevant one if a simple grep through all sources
20didn't help. They also provide some notes about using the samples and what
fc2171bd 21features of wxWidgets are they supposed to test.
eb91c0be 22
fc2171bd 23There are currently more than 50 different samples as part of wxWidgets and
f5e0b4bc 24this list is not complete. You should start your tour of wxWidgets with the
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25\helpref{minimal sample}{sampleminimal} which is the wxWidgets version of
26"Hello, world!". It shows the basic structure of wxWidgets program and is the
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27most commented sample of all - looking at its source code is recommended.
28
f5e0b4bc 29The next most useful sample is probably the \helpref{controls}{samplecontrols}
fc2171bd 30one which shows many of wxWidgets standard controls, such as buttons,
ecf527c0 31listboxes, checkboxes, comboboxes etc.
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32
33Other, more complicated controls, have their own samples. In this category you
34may find the following samples showing the corresponding controls:
35
36\begin{twocollist}\itemsep=0pt
37\twocolitem{\helpref{wxCalendarCtrl}{samplecalendar}}{Calendar a.k.a. date picker control}
38\twocolitem{\helpref{wxListCtrl}{samplelistctrl}}{List view control}
39\twocolitem{\helpref{wxTreeCtrl}{sampletreectrl}}{Tree view control}
40\twocolitem{\helpref{wxGrid}{samplegrid}}{Grid control}
41\end{twocollist}
42
43Finally, it might be helpful to do a search in the entire sample directory if
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44you can't find the sample showing the control you are interested in by
45name. Most classes contained in wxWidgets occur in at least one of the samples.
238ddd26 46
4c39aa3a 47
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48\subsection{Minimal sample}\label{sampleminimal}
49
50The minimal sample is what most people will know under the term Hello World,
51i.e. a minimal program that doesn't demonstrate anything apart from what is
52needed to write a program that will display a "hello" dialog. This is usually
fc2171bd 53a good starting point for learning how to use wxWidgets.
238ddd26 54
4c39aa3a 55
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56\subsection{Art provider sample}\label{sampleartprovider}
57
58The {\tt artprov} sample shows how you can customize the look of standard
fc2171bd 59wxWidgets dialogs by replacing default bitmaps/icons with your own versions.
f4fcc291 60It also shows how you can use wxArtProvider to
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61get stock bitmaps for use in your application.
62
4c39aa3a 63
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64\subsection{Calendar sample}\label{samplecalendar}
65
66This font shows the \helpref{calendar control}{wxcalendarctrl} in action. It
67shows how to configure the control (see the different options in the calendar
68menu) and also how to process the notifications from it.
69
4c39aa3a 70
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71\subsection{Checklist sample}\label{samplechecklist}
72
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73This sample demonstrates use of the \helpref{wxCheckListBox}{wxchecklistbox}
74class intercepting check, select and double click events. It also tests
f6bcfd97 75use of various methods modifying the control, such as by deleting items
87b6002d 76from it or inserting new ones (these functions are actually implemented in
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77the parent class \helpref{wxListBox}{wxlistbox} so the sample tests that class
78as well). The layout of the dialog is created using a \helpref{wxBoxSizer}{wxboxsizer}
79demonstrating a simple dynamic layout.
80
4c39aa3a 81
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82\subsection{Config sample}\label{sampleconfig}
83
84This sample demonstrates the \helpref{wxConfig}{wxconfigbase} classes in a platform
2edb0bde 85independent way, i.e. it uses text based files to store a given configuration under
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86Unix and uses the Registry under Windows.
87
88See \helpref{wxConfig overview}{wxconfigoverview} for the descriptions of all
89features of this class.
90
4c39aa3a 91
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92\subsection{Controls sample}\label{samplecontrols}
93
94The controls sample is the main test program for most simple controls used in
fc2171bd 95wxWidgets. The sample tests their basic functionality, events, placement,
32ab332f 96modification in terms of colour and font as well as the possibility to change
87b6002d 97the controls programmatically, such as adding an item to a list box etc. Apart
32ab332f 98from that, the sample uses a \helpref{wxNotebook}{wxnotebook} and tests most
f5e0b4bc 99features of this special control (using bitmap in the tabs, using
32ab332f 100\helpref{wxSizers}{wxsizer} and \helpref{constraints}{wxlayoutconstraints} within
f6bcfd97 101notebook pages, advancing pages programmatically and vetoing a page change
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102by intercepting the \helpref{wxNotebookEvent}{wxnotebookevent}.
103
104The various controls tested are listed here:
ecf527c0 105
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106\begin{twocollist}\itemsep=0pt
107\twocolitem{\helpref{wxButton}{wxbutton}}{Push button control, displaying text}
108\twocolitem{\helpref{wxBitmapButton}{wxbitmapbutton}}{Push button control, displaying a bitmap}
109\twocolitem{\helpref{wxCheckBox}{wxcheckbox}}{Checkbox control}
110\twocolitem{\helpref{wxChoice}{wxchoice}}{Choice control (a combobox without the editable area)}
111\twocolitem{\helpref{wxComboBox}{wxcombobox}}{A choice with an editable area}
112\twocolitem{\helpref{wxGauge}{wxgauge}}{A control to represent a varying quantity, such as time remaining}
113\twocolitem{\helpref{wxStaticBox}{wxstaticbox}}{A static, or group box for visually grouping related controls}
114\twocolitem{\helpref{wxListBox}{wxlistbox}}{A list of strings for single or multiple selection}
115\twocolitem{wxSpinCtrl}{A spin ctrl with a text field and a `up-down' control}
116\twocolitem{\helpref{wxSpinButton}{wxspinbutton}}{A spin or `up-down' control}
117\twocolitem{\helpref{wxStaticText}{wxstatictext}}{One or more lines of non-editable text}
118\twocolitem{\helpref{wxStaticBitmap}{wxstaticbitmap}}{A control to display a bitmap}
119\twocolitem{\helpref{wxRadioBox}{wxradiobox}}{A group of radio buttons}
120\twocolitem{\helpref{wxRadioButton}{wxradiobutton}}{A round button to be used with others in a mutually exclusive way}
121\twocolitem{\helpref{wxSlider}{wxslider}}{A slider that can be dragged by the user}
122\end{twocollist}
123
4c39aa3a 124
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125\subsection{Database sample}\label{sampledb}
126
127The database sample is a small test program showing how to use the ODBC
f5e0b4bc 128classes written by Remstar Intl. Obviously, this sample requires a
19320af4 129database with ODBC support to be correctly installed on your system.
32ab332f 130
4c39aa3a 131
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132\subsection{DebugRpt sample}\label{sampledebugrpt}
133
134This sample shows how to use \helpref{wxDebugReport}{wxdebugreport} class to
135generate a debug report in case of a program crash or otherwise. On start up,
136it proposes to either crash itself (by dereferencing a NULL pointer) or
137generate debug report without doing it. Next it initializes the debug report
138with standard information adding a custom file to it (just a timestamp) and
139allows to view the information gathered using
140\helpref{wxDebugReportPreview}{wxdebugreportpreview}.
141
142For the report processing part of the sample to work you should make available
143a Web server accepting form uploads, otherwise
144\helpref{wxDebugReportUpload}{wxdebugreportupload} will report an error.
145
146
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147\subsection{Dialogs sample}\label{sampledialogs}
148
fc2171bd 149This sample shows how to use the common dialogs available from wxWidgets. These
87b6002d 150dialogs are described in detail in the \helpref{Common dialogs overview}{commondialogsoverview}.
f6bcfd97 151
4c39aa3a 152
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153\subsection{Dialup sample}\label{sampledialup}
154
f5e0b4bc 155This sample shows the \helpref{wxDialUpManager}{wxdialupmanager}
f70c0443 156class. In the status bar, it displays the information gathered through its
2edb0bde 157interface: in particular, the current connection status (online or offline) and
f6bcfd97 158whether the connection is permanent (in which case a string `LAN' appears in
87b6002d 159the third status bar field - but note that you may be on a LAN not
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160connected to the Internet, in which case you will not see this) or not.
161
162Using the menu entries, you may also dial or hang up the line if you have a
163modem attached and (this only makes sense for Windows) list the available
164connections.
cddfbd9f 165
4c39aa3a 166
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167\subsection{DnD sample}\label{samplednd}
168
169This sample shows both clipboard and drag and drop in action. It is quite non
170trivial and may be safely used as a basis for implementing the clipboard and
171drag and drop operations in a real-life program.
172
173When you run the sample, its screen is split in several parts. On the top,
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174there are two listboxes which show the standard derivations of
175\helpref{wxDropTarget}{wxdroptarget}:
176\helpref{wxTextDropTarget}{wxtextdroptarget} and
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177\helpref{wxFileDropTarget}{wxfiledroptarget}.
178
179The middle of the sample window is taken by the log window which shows what is
180going on (of course, this only works in debug builds) and may be helpful to see
181the sequence of steps of data transfer.
182
183Finally, the last part is used for dragging text from it to either one of the
184listboxes (only one will accept it) or another application. The last
185functionality available from the main frame is to paste a bitmap from the
87b6002d 186clipboard (or, in the case of the Windows version, also a metafile) - it will be
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187shown in a new frame.
188
189So far, everything we mentioned was implemented with minimal amount of code
fc2171bd 190using standard wxWidgets classes. The more advanced features are demonstrated
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191if you create a shape frame from the main frame menu. A shape is a geometric
192object which has a position, size and color. It models some
193application-specific data in this sample. A shape object supports its own
194private \helpref{wxDataFormat}{wxdataformat} which means that you may cut and
195paste it or drag and drop (between one and the same or different shapes) from
196one sample instance to another (or the same). However, chances are that no
197other program supports this format and so shapes can also be rendered as
198bitmaps which allows them to be pasted/dropped in many other applications
199(and, under Windows, also as metafiles which are supported by most of Windows
200programs as well - try Write/Wordpad, for example).
201
f5e0b4bc 202Take a look at DnDShapeDataObject class to see how you may use
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203\helpref{wxDataObject}{wxdataobject} to achieve this.
204
4c39aa3a 205
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206\subsection{Dynamic sample}\label{sampledynamic}
207
f70c0443 208This sample is a very small sample that demonstrates use of the
238ddd26 209\helpref{wxEvtHandler::Connect}{wxevthandlerconnect} method. This method
87b6002d 210should be used whenever it is not known at compile time which control
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211will receive which event or which controls are actually going to be in
212a dialog or frame. This is most typically the case for any scripting
fc2171bd 213language that would work as a wrapper for wxWidgets or programs where
87b6002d 214forms or similar datagrams can be created by the users.
238ddd26 215
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216See also the \helpref{event sample}{sampleevent}
217
4c39aa3a 218
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219\subsection{Event sample}\label{sampleevent}
220
fc2171bd 221The event sample demonstrates various features of the wxWidgets events. It
6164f93c 222shows using dynamic events and connecting/disconnecting the event handlers
f5e0b4bc 223during run time and also using
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224\helpref{PushEventHandler()}{wxwindowpusheventhandler} and
225\helpref{PopEventHandler()}{wxwindowpopeventhandler}.
226
227It replaces the old dynamic sample.
228
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229
230\subsection{Except(ions) sample}\label{sampleexcept}
231
fc2171bd 232This very simple sample shows how to use C++ exceptions in wxWidgets programs,
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233i.e. where to catch the exception which may be thrown by the program code. It
234doesn't do anything very exciting by itself, you need to study its code to
235understand what goes on.
236
237You need to build the library with \texttt{wxUSE\_EXCEPTIONS} being set to $1$
87b6002d 238and compile your code with C++ exceptions support to be able to build this
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239sample.
240
241
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242\subsection{Exec sample}\label{sampleexec}
243
f5e0b4bc 244The exec sample demonstrates the \helpref{wxExecute}{wxexecute} and
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245\helpref{wxShell}{wxshell} functions. Both of them are used to execute the
246external programs and the sample shows how to do this synchronously (waiting
247until the program terminates) or asynchronously (notification will come later).
248
f6bcfd97 249It also shows how to capture the output of the child process in both
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250synchronous and asynchronous cases and how to kill the processes with
251\helpref{wxProcess::Kill}{wxprocesskill} and test for their existence with
50567b69 252\helpref{wxProcess::Exists}{wxprocessexists}.
f6bcfd97 253
4c39aa3a 254
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255\subsection{Font sample}\label{samplefont}
256
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257The font sample demonstrates \helpref{wxFont}{wxfont},
258\helpref{wxFontEnumerator}{wxfontenumerator} and
775a998e 259\helpref{wxFontMapper}{wxfontmapper} classes. It allows you to see the fonts
fc2171bd 260available (to wxWidgets) on the computer and shows all characters of the
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261chosen font as well.
262
4c39aa3a 263
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264\subsection{Grid sample}\label{samplegrid}
265
266TODO.
267
4c39aa3a 268
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269\subsection{HTML samples}\label{samplehtml}
270
271Eight HTML samples (you can find them in directory {\tt samples/html})
87b6002d 272cover all features of the HTML sub-library.
61eff74f 273
f5e0b4bc 274{\bf Test} demonstrates how to create \helpref{wxHtmlWindow}{wxhtmlwindow}
87b6002d 275and also shows most supported HTML tags.
61eff74f 276
87b6002d 277{\bf Widget} shows how you can embed ordinary controls or windows within an
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278HTML page. It also nicely explains how to write new tag handlers and extend
279the library to work with unsupported tags.
280
87b6002d 281{\bf About} may give you an idea how to write good-looking About boxes.
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282
283{\bf Zip} demonstrates use of virtual file systems in wxHTML. The zip archives
f5e0b4bc 284handler (ships with wxWidgets) allows you to access HTML pages stored
87b6002d 285in a compressed archive as if they were ordinary files.
61eff74f 286
f6bcfd97 287{\bf Virtual} is yet another virtual file systems demo. This one generates pages at run-time.
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288You may find it useful if you need to display some reports in your application.
289
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290{\bf Printing} explains use of \helpref{wxHtmlEasyPrinting}{wxhtmleasyprinting}
291class which serves as as-simple-as-possible interface for printing HTML
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292documents without much work. In fact, only few function calls are sufficient.
293
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294{\bf Help} and {\bf Helpview} are variations on displaying HTML help
295(compatible with MS HTML Help Workshop). {\it Help} shows how to embed
61eff74f 296\helpref{wxHtmlHelpController}{wxhtmlhelpcontroller} in your application
87b6002d 297while {\it Helpview} is a simple tool that only pops up the help window and
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298displays help books given at command line.
299
4c39aa3a 300
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301\subsection{Image sample}\label{sampleimage}
302
f70c0443 303The image sample demonstrates use of the \helpref{wxImage}{wximage} class
963863ad 304and shows how to download images in a variety of formats, currently PNG, GIF,
87b6002d 305TIFF, JPEG, BMP, PNM and PCX. The top of the sample shows two rectangles, one
f5e0b4bc 306of which is drawn directly in the window, the other one is drawn into a
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307\helpref{wxBitmap}{wxbitmap}, converted to a wxImage, saved as a PNG image
308and then reloaded from the PNG file again so that conversions between wxImage
87b6002d 309and wxBitmap as well as loading and saving PNG files are tested.
963863ad 310
87b6002d 311At the bottom of the main frame there is a test for using a monochrome bitmap by
963863ad 312drawing into a \helpref{wxMemoryDC}{wxmemorydc}. The bitmap is then drawn
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313specifying the foreground and background colours with
314\helpref{wxDC::SetTextForeground}{wxdcsettextforeground} and
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315\helpref{wxDC::SetTextBackground}{wxdcsettextbackground} (on the left). The
316bitmap is then converted to a wxImage and the foreground colour (black) is
317replaced with red using \helpref{wxImage::Replace}{wximagereplace}.
318
4c39aa3a 319
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320\subsection{Internat(ionalization) sample}\label{sampleinternat}
321
fc2171bd 322The not very clearly named internat sample demonstrates the wxWidgets
87b6002d 323internationalization (i18n for short from now on) features. To be more
fb848f58 324precise, it only shows localization support, i.e. support for translating the
f70c0443 325program messages into another language while true i18n would also involve
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326changing the other aspects of the programs behaviour.
327
328More information about this sample can be found in the {\tt readme.txt} file in
a81705a3 329its directory. Please see also \helpref{i18n overview}{internationalization}.
fb848f58 330
4c39aa3a 331
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332\subsection{Layout sample}\label{samplelayout}
333
334The layout sample demonstrates the two different layout systems offered
fc2171bd 335by wxWidgets. When starting the program, you will see a frame with some
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336controls and some graphics. The controls will change their size whenever
337you resize the entire frame and the exact behaviour of the size changes
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338is determined using the \helpref{wxLayoutConstraints}{wxlayoutconstraints}
339class. See also the \helpref{overview}{constraintsoverview} and the
340\helpref{wxIndividualLayoutConstraint}{wxindividuallayoutconstraint}
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341class for further information.
342
343The menu in this sample offers two more tests, one showing how to use
344a \helpref{wxBoxSizer}{wxboxsizer} in a simple dialog and the other one
f5e0b4bc 345showing how to use sizers in connection with a \helpref{wxNotebook}{wxnotebook}
c6eb7785 346class. See also \helpref{wxSizer}{wxsizer}.
238ddd26 347
4c39aa3a 348
963863ad 349\subsection{Listctrl sample}\label{samplelistctrl}
32ab332f 350
87b6002d 351This sample shows the \helpref{wxListCtrl}{wxlistctrl} control. Different modes
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352supported by the control (list, icons, small icons, report) may be chosen from
353the menu.
32ab332f 354
963863ad 355The sample also provides some timings for adding/deleting/sorting a lot of
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356(several thousands) items into the control.
357
358
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359\subsection{Mediaplayer sample}\label{samplemediaplayer}
360
361This sample demonstrates how to use all the features of
61c083e7 362\helpref{wxMediaCtrl}{wxmediactrl} and play various types of sound, video,
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363and other files.
364
365
366It replaces the old dynamic sample.
4c39aa3a 367
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368\subsection{Notebook sample}\label{samplenotebook}
369
b742a43b 370This samples shows \helpref{wxBookCtrl}{wxbookctrloverview} family of controls.
566a06e8 371Although initially it was written to demonstrate \helpref{wxNotebook}{wxnotebook}
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372only, it can now be also used to see \helpref{wxListbook}{wxlistbook},
373\helpref{wxChoicebook}{wxchoicebook} and \helpref{wxTreebook}{wxtreebook} in action.
374Test each of the controls, their orientation, images and pages using commands through menu.
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375
376
4c39aa3a 377
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378\subsection{Render sample}\label{samplerender}
379
f5e0b4bc 380This sample shows how to replace the default wxWidgets
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381\helpref{renderer}{wxrenderernative} and also how to write a shared library
382(DLL) implementing a renderer and load and unload it during the run-time.
383
32ab332f 384
4c39aa3a 385
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386\subsection{Rotate sample}\label{samplerotate}
387
388This is a simple example which demonstrates how to rotate an image with
389the \helpref{wxImage::Rotate}{wximagerotate} method. The rotation can
390be done without interpolation (left mouse button) which will be faster,
391or with interpolation (right mouse button) which is slower but gives
392better results.
393
4c39aa3a 394
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395\subsection{Scroll subwindow sample}\label{samplescrollsub}
396
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397This sample demonstrates use of the \helpref{wxScrolledWindow}{wxscrolledwindow}
398class including placing subwindows into it and drawing simple graphics. It uses the
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399\helpref{SetTargetWindow}{wxscrolledwindowsettargetwindow} method and thus the effect
400of scrolling does not show in the scrolled window itself, but in one of its subwindows.
401
fc2171bd 402Additionally, this samples demonstrates how to optimize drawing operations in wxWidgets,
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403in particular using the \helpref{wxWindow::IsExposed}{wxwindowisexposed} method with
404the aim to prevent unnecessary drawing in the window and thus reducing or removing
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405flicker on screen.
406
4c39aa3a 407
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408\subsection{Sockets sample}\label{samplesockets}
409
410The sockets sample demonstrates how to use the communication facilities
411provided by \helpref{wxSocket}{wxsocketbase}. There are two different
f5e0b4bc 412applications in this sample: a server, which is implemented using a
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413\helpref{wxSocketServer}{wxsocketserver} object, and a client, which
414is implemented as a \helpref{wxSocketClient}{wxsocketclient}.
415
416The server binds to the local address, using TCP port number 3000,
417sets up an event handler to be notified of incoming connection requests
87b6002d 418({\bf wxSOCKET\_CONNECTION} events), and sits there, waiting for clients
f70c0443 419({\it listening}, in socket parlance). For each accepted connection,
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420a new \helpref{wxSocketBase}{wxsocketbase} object is created. These
421socket objects are independent from the server that created them, so
422they set up their own event handler, and then request to be notified
f5e0b4bc 423of {\bf wxSOCKET\_INPUT} (incoming data) or {\bf wxSOCKET\_LOST}
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424(connection closed at the remote end) events. In the sample, the event
425handler is the same for all connections; to find out which socket the
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426event is addressed to, the \helpref{GetSocket}{wxsocketeventgetsocket} function
427is used.
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428
429Although it might take some time to get used to the event-oriented
430system upon which wxSocket is built, the benefits are many. See, for
431example, that the server application, while being single-threaded
432(and of course without using fork() or ugly select() loops) can handle
433an arbitrary number of connections.
434
435The client starts up unconnected, so you can use the Connect... option
436to specify the address of the server you are going to connect to (the
437TCP port number is hard-coded as 3000). Once connected, a number of
438tests are possible. Currently, three tests are implemented. They show
439how to use the basic IO calls in \helpref{wxSocketBase}{wxsocketbase},
f5e0b4bc 440such as \helpref{Read}{wxsocketbaseread}, \helpref{Write}{wxsocketbasewrite},
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441\helpref{ReadMsg}{wxsocketbasereadmsg} and \helpref{WriteMsg}{wxsocketbasewritemsg},
442and how to set up the correct IO flags depending on what you are going to
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443do. See the comments in the code for more information. Note that because
444both clients and connection objects in the server set up an event handler
445to catch {\bf wxSOCKET\_LOST} events, each one is immediately notified
446if the other end closes the connection.
e5a2291a 447
87b6002d 448There is also a URL test which shows how to use
f6bcfd97 449the \helpref{wxURL}{wxurl} class to fetch data from a given URL.
b4e87ec3 450
5adbbc29 451The sockets sample is work in progress. Some things to do:
e5a2291a 452
ecf527c0 453\begin{itemize}\itemsep=0pt
e5a2291a 454\item More tests for basic socket functionality.
b4e87ec3 455\item More tests for protocol classes (wxProtocol and its descendants).
5adbbc29 456\item Tests for the recently added (and still in alpha stage) datagram sockets.
e5a2291a 457\item New samples which actually do something useful (suggestions accepted).
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458\end{itemize}
459
4c39aa3a 460
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461\subsection{Sound sample}\label{samplesound}
462
315ebf68 463The {\tt sound} sample shows how to use \helpref{wxSound}{wxsound} for simple
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464audio output (e.g. notifications).
465
466
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467\subsection{Statbar sample}\label{samplestatbar}
468
105521d1 469This sample shows how to create and use wxStatusBar. Although most of the
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470samples have a statusbar, they usually only create a default one and only
471do it once.
472
473Here you can see how to recreate the statusbar (with possibly different number
474of fields) and how to use it to show icons/bitmaps and/or put arbitrary
475controls into it.
476
4c39aa3a 477
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478\subsection{Text sample}\label{sampletext}
479
480This sample demonstrates four features: firstly the use and many variants of
481the \helpref{wxTextCtrl}{wxtextctrl} class (single line, multi line, read only,
482password, ignoring TAB, ignoring ENTER).
483
484Secondly it shows how to intercept a \helpref{wxKeyEvent}{wxkeyevent} in both
d17f05af 485the raw form using the {\tt EVT\_KEY\_UP} and {\tt EVT\_KEY\_DOWN} macros and the
f6bcfd97 486higher level from using the {\tt EVT\_CHAR} macro. All characters will be logged
238ddd26 487in a log window at the bottom of the main window. By pressing some of the function
f6bcfd97 488keys, you can test some actions in the text ctrl as well as get statistics on the
2edb0bde 489text ctrls, which is useful for testing if these statistics actually are correct.
238ddd26 490
f5e0b4bc 491Thirdly, on platforms which support it, the sample will offer to copy text to the
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492\helpref{wxClipboard}{wxclipboard} and to paste text from it. The GTK version will
493use the so called PRIMARY SELECTION, which is the pseudo clipboard under X and
b9989817 494best known from pasting text to the XTerm program.
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495
496Last not least: some of the text controls have tooltips and the sample also shows
497how tooltips can be centrally disabled and their latency controlled.
498
4c39aa3a 499
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500\subsection{Thread sample}\label{samplethread}
501
f70c0443 502This sample demonstrates use of threads in connection with GUI programs.
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503There are two fundamentally different ways to use threads in GUI programs and
504either way has to take care of the fact that the GUI library itself usually
505is not multi-threading safe, i.e. that it might crash if two threads try to
506access the GUI class simultaneously. One way to prevent that is have a normal
f5e0b4bc 507GUI program in the main thread and some worker threads which work in the
c88275cb 508background. In order to make communication between the main thread and the
f5e0b4bc 509worker threads possible, wxWidgets offers the \helpref{wxPostEvent}{wxpostevent}
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510function and this sample makes use of this function.
511
f5e0b4bc 512The other way to use a so called Mutex (such as those offered in the \helpref{wxMutex}{wxmutex}
c88275cb 513class) that prevent threads from accessing the GUI classes as long as any other
f5e0b4bc 514thread accesses them. For this, wxWidgets has the \helpref{wxMutexGuiEnter}{wxmutexguienter}
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515and \helpref{wxMutexGuiLeave}{wxmutexguileave} functions, both of which are
516used and tested in the sample as well.
517
518See also \helpref{Multithreading overview}{wxthreadoverview} and \helpref{wxThread}{wxthread}.
519
4c39aa3a 520
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521\subsection{Toolbar sample}\label{sampletoolbar}
522
523The toolbar sample shows the \helpref{wxToolBar}{wxtoolbar} class in action.
524
525The following things are demonstrated:
526
ecf527c0 527\begin{itemize}\itemsep=0pt
f5e0b4bc 528\item Creating the toolbar using \helpref{wxToolBar::AddTool}{wxtoolbaraddtool}
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529and \helpref{wxToolBar::AddControl}{wxtoolbaraddcontrol}: see
530MyApp::InitToolbar in the sample.
5ef2e633 531\item Using {\tt EVT\_UPDATE\_UI} handler for automatically enabling/disabling
f6bcfd97 532toolbar buttons without having to explicitly call EnableTool. This is done
5ef2e633 533in MyFrame::OnUpdateCopyAndCut.
f5e0b4bc 534\item Using \helpref{wxToolBar::DeleteTool}{wxtoolbardeletetool} and
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535\helpref{wxToolBar::InsertTool}{wxtoolbarinserttool} to dynamically update the
536toolbar.
5ef2e633 537\end{itemize}
963863ad 538
882bf210 539Some buttons in the main toolbar are check buttons, i.e. they stay checked when
87b6002d 540pressed. On the platforms which support it, the sample also adds a combobox
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541to the toolbar showing how you can use arbitrary controls and not only buttons
542in it.
543
544If you toggle another toolbar in the sample (using {\tt Ctrl-A}) you will also
545see the radio toolbar buttons in action: the first three buttons form a radio
87b6002d 546group, i.e. checking any of them automatically unchecks the previously
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547checked one.
548
4c39aa3a 549
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550\subsection{Treectrl sample}\label{sampletreectrl}
551
f70c0443 552This sample demonstrates using the \helpref{wxTreeCtrl}{wxtreectrl} class. Here
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553you may see how to process various notification messages sent by this control
554and also when they occur (by looking at the messages in the text control in
555the bottom part of the frame).
556
557Adding, inserting and deleting items and branches from the tree as well as
558sorting (in default alphabetical order as well as in custom one) is
559demonstrated here as well - try the corresponding menu entries.
ecf527c0 560
4c39aa3a 561
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562\subsection{Wizard sample}\label{samplewizard}
563
f5e0b4bc 564This sample shows the so-called wizard dialog (implemented using
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565\helpref{wxWizard}{wxwizard} and related classes). It shows almost all
566features supported:
567
568\begin{itemize}\itemsep=0pt
569\item Using bitmaps with the wizard and changing them depending on the page
570shown (notice that wxValidationPage in the sample has a different image from
571the other ones)
f5e0b4bc 572\item Using \helpref{TransferDataFromWindow}{wxwindowtransferdatafromwindow}
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573to verify that the data entered is correct before passing to the next page
574(done in wxValidationPage which forces the user to check a checkbox before
575continuing).
576\item Using more elaborated techniques to allow returning to the previous
577page, but not continuing to the next one or vice versa (in wxRadioboxPage)
87b6002d 578\item This (wxRadioboxPage) page also shows how the page may process the {\tt
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579Cancel} button itself instead of relying on the wizard parent to do it.
580\item Normally, the order of the pages in the wizard is known at compile-time,
581but sometimes it depends on the user choices: wxCheckboxPage shows how to
f5e0b4bc 582dynamically decide which page to display next (see also
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583\helpref{wxWizardPage}{wxwizardpage})
584\end{itemize}
585