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authorGuido van Rossum <guido@python.org>1994-01-02 01:22:07 (GMT)
committerGuido van Rossum <guido@python.org>1994-01-02 01:22:07 (GMT)
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+\chapter{STDWIN ONLY}
+
+\section{Built-in Module \sectcode{stdwin}}
+\bimodindex{stdwin}
+
+This module defines several new object types and functions that
+provide access to the functionality of the Standard Window System
+Interface, STDWIN [CWI report CR-R8817].
+It is available on systems to which STDWIN has been ported (which is
+most systems).
+It is only available if the \code{DISPLAY} environment variable is set
+or an explicit \samp{-display \var{displayname}} argument is passed to
+the interpreter.
+
+Functions have names that usually resemble their C STDWIN counterparts
+with the initial `w' dropped.
+Points are represented by pairs of integers; rectangles
+by pairs of points.
+For a complete description of STDWIN please refer to the documentation
+of STDWIN for C programmers (aforementioned CWI report).
+
+\subsection{Functions Defined in Module \sectcode{stdwin}}
+
+The following functions are defined in the \code{stdwin} module:
+
+\renewcommand{\indexsubitem}{(in module stdwin)}
+\begin{funcdesc}{open}{title}
+Open a new window whose initial title is given by the string argument.
+Return a window object; window object methods are described below.%
+\footnote{The Python version of STDWIN does not support draw procedures; all
+ drawing requests are reported as draw events.}
+\end{funcdesc}
+
+\begin{funcdesc}{getevent}{}
+Wait for and return the next event.
+An event is returned as a triple: the first element is the event
+type, a small integer; the second element is the window object to which
+the event applies, or
+\code{None}
+if it applies to no window in particular;
+the third element is type-dependent.
+Names for event types and command codes are defined in the standard
+module
+\code{stdwinevent}.
+\end{funcdesc}
+
+\begin{funcdesc}{pollevent}{}
+Return the next event, if one is immediately available.
+If no event is available, return \code{()}.
+\end{funcdesc}
+
+\begin{funcdesc}{getactive}{}
+Return the window that is currently active, or \code{None} if no
+window is currently active. (This can be emulated by monitoring
+WE_ACTIVATE and WE_DEACTIVATE events.)
+\end{funcdesc}
+
+\begin{funcdesc}{listfontnames}{pattern}
+Return the list of font names in the system that match the pattern (a
+string). The pattern should normally be \code{'*'}; returns all
+available fonts. If the underlying window system is X11, other
+patterns follow the standard X11 font selection syntax (as used e.g.
+in resource definitions), i.e. the wildcard character \code{'*'}
+matches any sequence of characters (including none) and \code{'?'}
+matches any single character.
+\end{funcdesc}
+
+\begin{funcdesc}{setdefscrollbars}{hflag\, vflag}
+Set the flags controlling whether subsequently opened windows will
+have horizontal and/or vertical scroll bars.
+\end{funcdesc}
+
+\begin{funcdesc}{setdefwinpos}{h\, v}
+Set the default window position for windows opened subsequently.
+\end{funcdesc}
+
+\begin{funcdesc}{setdefwinsize}{width\, height}
+Set the default window size for windows opened subsequently.
+\end{funcdesc}
+
+\begin{funcdesc}{getdefscrollbars}{}
+Return the flags controlling whether subsequently opened windows will
+have horizontal and/or vertical scroll bars.
+\end{funcdesc}
+
+\begin{funcdesc}{getdefwinpos}{}
+Return the default window position for windows opened subsequently.
+\end{funcdesc}
+
+\begin{funcdesc}{getdefwinsize}{}
+Return the default window size for windows opened subsequently.
+\end{funcdesc}
+
+\begin{funcdesc}{getscrsize}{}
+Return the screen size in pixels.
+\end{funcdesc}
+
+\begin{funcdesc}{getscrmm}{}
+Return the screen size in millimeters.
+\end{funcdesc}
+
+\begin{funcdesc}{fetchcolor}{colorname}
+Return the pixel value corresponding to the given color name.
+Return the default foreground color for unknown color names.
+Hint: the following code tests wheter you are on a machine that
+supports more than two colors:
+\bcode\begin{verbatim}
+if stdwin.fetchcolor('black') <> \
+ stdwin.fetchcolor('red') <> \
+ stdwin.fetchcolor('white'):
+ print 'color machine'
+else:
+ print 'monochrome machine'
+\end{verbatim}\ecode
+\end{funcdesc}
+
+\begin{funcdesc}{setfgcolor}{pixel}
+Set the default foreground color.
+This will become the default foreground color of windows opened
+subsequently, including dialogs.
+\end{funcdesc}
+
+\begin{funcdesc}{setbgcolor}{pixel}
+Set the default background color.
+This will become the default background color of windows opened
+subsequently, including dialogs.
+\end{funcdesc}
+
+\begin{funcdesc}{getfgcolor}{}
+Return the pixel value of the current default foreground color.
+\end{funcdesc}
+
+\begin{funcdesc}{getbgcolor}{}
+Return the pixel value of the current default background color.
+\end{funcdesc}
+
+\begin{funcdesc}{setfont}{fontname}
+Set the current default font.
+This will become the default font for windows opened subsequently,
+and is also used by the text measuring functions \code{textwidth},
+\code{textbreak}, \code{lineheight} and \code{baseline} below.
+This accepts two more optional parameters, size and style:
+Size is the font size (in `points').
+Style is a single character specifying the style, as follows:
+\code{'b'} = bold,
+\code{'i'} = italic,
+\code{'o'} = bold + italic,
+\code{'u'} = underline;
+default style is roman.
+Size and style are ignored under X11 but used on the Macintosh.
+(Sorry for all this complexity --- a more uniform interface is being designed.)
+\end{funcdesc}
+
+\begin{funcdesc}{menucreate}{title}
+Create a menu object referring to a global menu (a menu that appears in
+all windows).
+Methods of menu objects are described below.
+Note: normally, menus are created locally; see the window method
+\code{menucreate} below.
+\strong{Warning:} the menu only appears in a window as long as the object
+returned by this call exists.
+\end{funcdesc}
+
+\begin{funcdesc}{newbitmap}{width\, height}
+Create a new bitmap object of the given dimensions.
+Methods of bitmap objects are described below.
+\end{funcdesc}
+
+\begin{funcdesc}{fleep}{}
+Cause a beep or bell (or perhaps a `visual bell' or flash, hence the
+name).
+\end{funcdesc}
+
+\begin{funcdesc}{message}{string}
+Display a dialog box containing the string.
+The user must click OK before the function returns.
+\end{funcdesc}
+
+\begin{funcdesc}{askync}{prompt\, default}
+Display a dialog that prompts the user to answer a question with yes or
+no.
+Return 0 for no, 1 for yes.
+If the user hits the Return key, the default (which must be 0 or 1) is
+returned.
+If the user cancels the dialog, the
+\code{KeyboardInterrupt}
+exception is raised.
+\end{funcdesc}
+
+\begin{funcdesc}{askstr}{prompt\, default}
+Display a dialog that prompts the user for a string.
+If the user hits the Return key, the default string is returned.
+If the user cancels the dialog, the
+\code{KeyboardInterrupt}
+exception is raised.
+\end{funcdesc}
+
+\begin{funcdesc}{askfile}{prompt\, default\, new}
+Ask the user to specify a filename.
+If
+\var{new}
+is zero it must be an existing file; otherwise, it must be a new file.
+If the user cancels the dialog, the
+\code{KeyboardInterrupt}
+exception is raised.
+\end{funcdesc}
+
+\begin{funcdesc}{setcutbuffer}{i\, string}
+Store the string in the system's cut buffer number
+\var{i},
+where it can be found (for pasting) by other applications.
+On X11, there are 8 cut buffers (numbered 0..7).
+Cut buffer number 0 is the `clipboard' on the Macintosh.
+\end{funcdesc}
+
+\begin{funcdesc}{getcutbuffer}{i}
+Return the contents of the system's cut buffer number
+\var{i}.
+\end{funcdesc}
+
+\begin{funcdesc}{rotatecutbuffers}{n}
+On X11, rotate the 8 cut buffers by
+\var{n}.
+Ignored on the Macintosh.
+\end{funcdesc}
+
+\begin{funcdesc}{getselection}{i}
+Return X11 selection number
+\var{i.}
+Selections are not cut buffers.
+Selection numbers are defined in module
+\code{stdwinevents}.
+Selection \code{WS_PRIMARY} is the
+\dfn{primary}
+selection (used by
+xterm,
+for instance);
+selection \code{WS_SECONDARY} is the
+\dfn{secondary}
+selection; selection \code{WS_CLIPBOARD} is the
+\dfn{clipboard}
+selection (used by
+xclipboard).
+On the Macintosh, this always returns an empty string.
+\end{funcdesc}
+
+\begin{funcdesc}{resetselection}{i}
+Reset selection number
+\var{i},
+if this process owns it.
+(See window method
+\code{setselection()}).
+\end{funcdesc}
+
+\begin{funcdesc}{baseline}{}
+Return the baseline of the current font (defined by STDWIN as the
+vertical distance between the baseline and the top of the
+characters).
+\end{funcdesc}
+
+\begin{funcdesc}{lineheight}{}
+Return the total line height of the current font.
+\end{funcdesc}
+
+\begin{funcdesc}{textbreak}{str\, width}
+Return the number of characters of the string that fit into a space of
+\var{width}
+bits wide when drawn in the curent font.
+\end{funcdesc}
+
+\begin{funcdesc}{textwidth}{str}
+Return the width in bits of the string when drawn in the current font.
+\end{funcdesc}
+
+\begin{funcdesc}{connectionnumber}{}
+\funcline{fileno}{}
+(X11 under \UNIX{} only) Return the ``connection number'' used by the
+underlying X11 implementation. (This is normally the file number of
+the socket.) Both functions return the same value;
+\code{connectionnumber()} is named after the corresponding function in
+X11 and STDWIN, while \code{fileno()} makes it possible to use the
+\code{stdwin} module as a ``file'' object parameter to
+\code{select.select()}. Note that if \code{select()} implies that
+input is possible on \code{stdwin}, this does not guarantee that an
+event is ready --- it may be some internal communication going on
+between the X server and the client library. Thus, you should call
+\code{stdwin.pollevent()} until it returns \code{None} to check for
+events if you don't want your program to block. Because of internal
+buffering in X11, it is also possible that \code{stdwin.pollevent()}
+returns an event while \code{select()} does not find \code{stdwin} to
+be ready, so you should read any pending events with
+\code{stdwin.pollevent()} until it returns \code{None} before entering
+a blocking \code{select()} call.
+\ttindex{select}
+\end{funcdesc}
+
+\subsection{Window Object Methods}
+
+Window objects are created by \code{stdwin.open()}. They are closed
+by their \code{close()} method or when they are garbage-collected.
+Window objects have the following methods:
+
+\renewcommand{\indexsubitem}{(window method)}
+
+\begin{funcdesc}{begindrawing}{}
+Return a drawing object, whose methods (described below) allow drawing
+in the window.
+\end{funcdesc}
+
+\begin{funcdesc}{change}{rect}
+Invalidate the given rectangle; this may cause a draw event.
+\end{funcdesc}
+
+\begin{funcdesc}{gettitle}{}
+Returns the window's title string.
+\end{funcdesc}
+
+\begin{funcdesc}{getdocsize}{}
+\begin{sloppypar}
+Return a pair of integers giving the size of the document as set by
+\code{setdocsize()}.
+\end{sloppypar}
+\end{funcdesc}
+
+\begin{funcdesc}{getorigin}{}
+Return a pair of integers giving the origin of the window with respect
+to the document.
+\end{funcdesc}
+
+\begin{funcdesc}{gettitle}{}
+Return the window's title string.
+\end{funcdesc}
+
+\begin{funcdesc}{getwinsize}{}
+Return a pair of integers giving the size of the window.
+\end{funcdesc}
+
+\begin{funcdesc}{getwinpos}{}
+Return a pair of integers giving the position of the window's upper
+left corner (relative to the upper left corner of the screen).
+\end{funcdesc}
+
+\begin{funcdesc}{menucreate}{title}
+Create a menu object referring to a local menu (a menu that appears
+only in this window).
+Methods of menu objects are described below.
+{\bf Warning:} the menu only appears as long as the object
+returned by this call exists.
+\end{funcdesc}
+
+\begin{funcdesc}{scroll}{rect\, point}
+Scroll the given rectangle by the vector given by the point.
+\end{funcdesc}
+
+\begin{funcdesc}{setdocsize}{point}
+Set the size of the drawing document.
+\end{funcdesc}
+
+\begin{funcdesc}{setorigin}{point}
+Move the origin of the window (its upper left corner)
+to the given point in the document.
+\end{funcdesc}
+
+\begin{funcdesc}{setselection}{i\, str}
+Attempt to set X11 selection number
+\var{i}
+to the string
+\var{str}.
+(See stdwin method
+\code{getselection()}
+for the meaning of
+\var{i}.)
+Return true if it succeeds.
+If succeeds, the window ``owns'' the selection until
+(a) another applications takes ownership of the selection; or
+(b) the window is deleted; or
+(c) the application clears ownership by calling
+\code{stdwin.resetselection(\var{i})}.
+When another application takes ownership of the selection, a
+\code{WE_LOST_SEL}
+event is received for no particular window and with the selection number
+as detail.
+Ignored on the Macintosh.
+\end{funcdesc}
+
+\begin{funcdesc}{settimer}{dsecs}
+Schedule a timer event for the window in
+\code{\var{dsecs}/10}
+seconds.
+\end{funcdesc}
+
+\begin{funcdesc}{settitle}{title}
+Set the window's title string.
+\end{funcdesc}
+
+\begin{funcdesc}{setwincursor}{name}
+\begin{sloppypar}
+Set the window cursor to a cursor of the given name.
+It raises the
+\code{RuntimeError}
+exception if no cursor of the given name exists.
+Suitable names include
+\code{'ibeam'},
+\code{'arrow'},
+\code{'cross'},
+\code{'watch'}
+and
+\code{'plus'}.
+On X11, there are many more (see
+\file{<X11/cursorfont.h>}).
+\end{sloppypar}
+\end{funcdesc}
+
+\begin{funcdesc}{setwinpos}{h\, v}
+Set the the position of the window's upper left corner (relative to
+the upper left corner of the screen).
+\end{funcdesc}
+
+\begin{funcdesc}{setwinsize}{width\, height}
+Set the window's size.
+\end{funcdesc}
+
+\begin{funcdesc}{show}{rect}
+Try to ensure that the given rectangle of the document is visible in
+the window.
+\end{funcdesc}
+
+\begin{funcdesc}{textcreate}{rect}
+Create a text-edit object in the document at the given rectangle.
+Methods of text-edit objects are described below.
+\end{funcdesc}
+
+\begin{funcdesc}{setactive}{}
+Attempt to make this window the active window. If successful, this
+will generate a WE_ACTIVATE event (and a WE_DEACTIVATE event in case
+another window in this application became inactive).
+\end{funcdesc}
+
+\begin{funcdesc}{close}{}
+Discard the window object. It should not be used again.
+\end{funcdesc}
+
+\subsection{Drawing Object Methods}
+
+Drawing objects are created exclusively by the window method
+\code{begindrawing()}.
+Only one drawing object can exist at any given time; the drawing object
+must be deleted to finish drawing.
+No drawing object may exist when
+\code{stdwin.getevent()}
+is called.
+Drawing objects have the following methods:
+
+\renewcommand{\indexsubitem}{(drawing method)}
+
+\begin{funcdesc}{box}{rect}
+Draw a box just inside a rectangle.
+\end{funcdesc}
+
+\begin{funcdesc}{circle}{center\, radius}
+Draw a circle with given center point and radius.
+\end{funcdesc}
+
+\begin{funcdesc}{elarc}{center\, \(rh\, rv\)\, \(a1\, a2\)}
+Draw an elliptical arc with given center point.
+\code{(\var{rh}, \var{rv})}
+gives the half sizes of the horizontal and vertical radii.
+\code{(\var{a1}, \var{a2})}
+gives the angles (in degrees) of the begin and end points.
+0 degrees is at 3 o'clock, 90 degrees is at 12 o'clock.
+\end{funcdesc}
+
+\begin{funcdesc}{erase}{rect}
+Erase a rectangle.
+\end{funcdesc}
+
+\begin{funcdesc}{fillcircle}{center\, radius}
+Draw a filled circle with given center point and radius.
+\end{funcdesc}
+
+\begin{funcdesc}{fillelarc}{center\, \(rh\, rv\)\, \(a1\, a2\)}
+Draw a filled elliptical arc; arguments as for \code{elarc}.
+\end{funcdesc}
+
+\begin{funcdesc}{fillpoly}{points}
+Draw a filled polygon given by a list (or tuple) of points.
+\end{funcdesc}
+
+\begin{funcdesc}{invert}{rect}
+Invert a rectangle.
+\end{funcdesc}
+
+\begin{funcdesc}{line}{p1\, p2}
+Draw a line from point
+\var{p1}
+to
+\var{p2}.
+\end{funcdesc}
+
+\begin{funcdesc}{paint}{rect}
+Fill a rectangle.
+\end{funcdesc}
+
+\begin{funcdesc}{poly}{points}
+Draw the lines connecting the given list (or tuple) of points.
+\end{funcdesc}
+
+\begin{funcdesc}{shade}{rect\, percent}
+Fill a rectangle with a shading pattern that is about
+\var{percent}
+percent filled.
+\end{funcdesc}
+
+\begin{funcdesc}{text}{p\, str}
+Draw a string starting at point p (the point specifies the
+top left coordinate of the string).
+\end{funcdesc}
+
+\begin{funcdesc}{xorcircle}{center\, radius}
+\funcline{xorelarc}{center\, \(rh\, rv\)\, \(a1\, a2\)}
+\funcline{xorline}{p1\, p2}
+\funcline{xorpoly}{points}
+Draw a circle, an elliptical arc, a line or a polygon, respectively,
+in XOR mode.
+\end{funcdesc}
+
+\begin{funcdesc}{setfgcolor}{}
+\funcline{setbgcolor}{}
+\funcline{getfgcolor}{}
+\funcline{getbgcolor}{}
+These functions are similar to the corresponding functions described
+above for the
+\code{stdwin}
+module, but affect or return the colors currently used for drawing
+instead of the global default colors.
+When a drawing object is created, its colors are set to the window's
+default colors, which are in turn initialized from the global default
+colors when the window is created.
+\end{funcdesc}
+
+\begin{funcdesc}{setfont}{}
+\funcline{baseline}{}
+\funcline{lineheight}{}
+\funcline{textbreak}{}
+\funcline{textwidth}{}
+These functions are similar to the corresponding functions described
+above for the
+\code{stdwin}
+module, but affect or use the current drawing font instead of
+the global default font.
+When a drawing object is created, its font is set to the window's
+default font, which is in turn initialized from the global default
+font when the window is created.
+\end{funcdesc}
+
+\begin{funcdesc}{bitmap}{point\, bitmap\, mask}
+Draw the \var{bitmap} with its top left corner at \var{point}.
+If the optional \var{mask} argument is present, it should be either
+the same object as \var{bitmap}, to draw only those bits that are set
+in the bitmap, in the foreground color, or \code{None}, to draw all
+bits (ones are drawn in the foreground color, zeros in the background
+color).
+\end{funcdesc}
+
+\begin{funcdesc}{cliprect}{rect}
+Set the ``clipping region'' to a rectangle.
+The clipping region limits the effect of all drawing operations, until
+it is changed again or until the drawing object is closed. When a
+drawing object is created the clipping region is set to the entire
+window. When an object to be drawn falls partly outside the clipping
+region, the set of pixels drawn is the intersection of the clipping
+region and the set of pixels that would be drawn by the same operation
+in the absence of a clipping region.
+clipping region
+\end{funcdesc}
+
+\begin{funcdesc}{noclip}{}
+Reset the clipping region to the entire window.
+\end{funcdesc}
+
+\begin{funcdesc}{close}{}
+\funcline{enddrawing}{}
+Discard the drawing object. It should not be used again.
+\end{funcdesc}
+
+\subsection{Menu Object Methods}
+
+A menu object represents a menu.
+The menu is destroyed when the menu object is deleted.
+The following methods are defined:
+
+\renewcommand{\indexsubitem}{(menu method)}
+
+\begin{funcdesc}{additem}{text\, shortcut}
+Add a menu item with given text.
+The shortcut must be a string of length 1, or omitted (to specify no
+shortcut).
+\end{funcdesc}
+
+\begin{funcdesc}{setitem}{i\, text}
+Set the text of item number
+\var{i}.
+\end{funcdesc}
+
+\begin{funcdesc}{enable}{i\, flag}
+Enable or disables item
+\var{i}.
+\end{funcdesc}
+
+\begin{funcdesc}{check}{i\, flag}
+Set or clear the
+\dfn{check mark}
+for item
+\var{i}.
+\end{funcdesc}
+
+\begin{funcdesc}{close}{}
+Discard the menu object. It should not be used again.
+\end{funcdesc}
+
+\subsection{Bitmap Object Methods}
+
+A bitmap represents a rectangular array of bits.
+The top left bit has coordinate (0, 0).
+A bitmap can be drawn with the \code{bitmap} method of a drawing object.
+The following methods are defined:
+
+\renewcommand{\indexsubitem}{(bitmap method)}
+
+\begin{funcdesc}{getsize}{}
+Return a tuple representing the width and height of the bitmap.
+(This returns the values that have been passed to the \code{newbitmap}
+function.)
+\end{funcdesc}
+
+\begin{funcdesc}{setbit}{point\, bit}
+Set the value of the bit indicated by \var{point} to \var{bit}.
+\end{funcdesc}
+
+\begin{funcdesc}{getbit}{point}
+Return the value of the bit indicated by \var{point}.
+\end{funcdesc}
+
+\begin{funcdesc}{close}{}
+Discard the bitmap object. It should not be used again.
+\end{funcdesc}
+
+\subsection{Text-edit Object Methods}
+
+A text-edit object represents a text-edit block.
+For semantics, see the STDWIN documentation for C programmers.
+The following methods exist:
+
+\renewcommand{\indexsubitem}{(text-edit method)}
+
+\begin{funcdesc}{arrow}{code}
+Pass an arrow event to the text-edit block.
+The
+\var{code}
+must be one of
+\code{WC_LEFT},
+\code{WC_RIGHT},
+\code{WC_UP}
+or
+\code{WC_DOWN}
+(see module
+\code{stdwinevents}).
+\end{funcdesc}
+
+\begin{funcdesc}{draw}{rect}
+Pass a draw event to the text-edit block.
+The rectangle specifies the redraw area.
+\end{funcdesc}
+
+\begin{funcdesc}{event}{type\, window\, detail}
+Pass an event gotten from
+\code{stdwin.getevent()}
+to the text-edit block.
+Return true if the event was handled.
+\end{funcdesc}
+
+\begin{funcdesc}{getfocus}{}
+Return 2 integers representing the start and end positions of the
+focus, usable as slice indices on the string returned by
+\code{gettext()}.
+\end{funcdesc}
+
+\begin{funcdesc}{getfocustext}{}
+Return the text in the focus.
+\end{funcdesc}
+
+\begin{funcdesc}{getrect}{}
+Return a rectangle giving the actual position of the text-edit block.
+(The bottom coordinate may differ from the initial position because
+the block automatically shrinks or grows to fit.)
+\end{funcdesc}
+
+\begin{funcdesc}{gettext}{}
+Return the entire text buffer.
+\end{funcdesc}
+
+\begin{funcdesc}{move}{rect}
+Specify a new position for the text-edit block in the document.
+\end{funcdesc}
+
+\begin{funcdesc}{replace}{str}
+Replace the text in the focus by the given string.
+The new focus is an insert point at the end of the string.
+\end{funcdesc}
+
+\begin{funcdesc}{setfocus}{i\, j}
+Specify the new focus.
+Out-of-bounds values are silently clipped.
+\end{funcdesc}
+
+\begin{funcdesc}{settext}{str}
+Replace the entire text buffer by the given string and set the focus
+to \code{(0, 0)}.
+\end{funcdesc}
+
+\begin{funcdesc}{setview}{rect}
+Set the view rectangle to \var{rect}. If \var{rect} is \code{None},
+viewing mode is reset. In viewing mode, all output from the text-edit
+object is clipped to the viewing rectangle. This may be useful to
+implement your own scrolling text subwindow.
+\end{funcdesc}
+
+\begin{funcdesc}{close}{}
+Discard the text-edit object. It should not be used again.
+\end{funcdesc}
+
+\subsection{Example}
+\nodename{Stdwin Example}
+
+Here is a minimal example of using STDWIN in Python.
+It creates a window and draws the string ``Hello world'' in the top
+left corner of the window.
+The window will be correctly redrawn when covered and re-exposed.
+The program quits when the close icon or menu item is requested.
+
+\bcode\begin{verbatim}
+import stdwin
+from stdwinevents import *
+
+def main():
+ mywin = stdwin.open('Hello')
+ #
+ while 1:
+ (type, win, detail) = stdwin.getevent()
+ if type == WE_DRAW:
+ draw = win.begindrawing()
+ draw.text((0, 0), 'Hello, world')
+ del draw
+ elif type == WE_CLOSE:
+ break
+
+main()
+\end{verbatim}\ecode
+
+\section{Standard Module \sectcode{stdwinevents}}
+\stmodindex{stdwinevents}
+
+This module defines constants used by STDWIN for event types
+(\code{WE_ACTIVATE} etc.), command codes (\code{WC_LEFT} etc.)
+and selection types (\code{WS_PRIMARY} etc.).
+Read the file for details.
+Suggested usage is
+
+\bcode\begin{verbatim}
+>>> from stdwinevents import *
+>>>
+\end{verbatim}\ecode
+
+\section{Standard Module \sectcode{rect}}
+\stmodindex{rect}
+
+This module contains useful operations on rectangles.
+A rectangle is defined as in module
+\code{stdwin}:
+a pair of points, where a point is a pair of integers.
+For example, the rectangle
+
+\bcode\begin{verbatim}
+(10, 20), (90, 80)
+\end{verbatim}\ecode
+
+is a rectangle whose left, top, right and bottom edges are 10, 20, 90
+and 80, respectively.
+Note that the positive vertical axis points down (as in
+\code{stdwin}).
+
+The module defines the following objects:
+
+\renewcommand{\indexsubitem}{(in module rect)}
+\begin{excdesc}{error}
+The exception raised by functions in this module when they detect an
+error.
+The exception argument is a string describing the problem in more
+detail.
+\end{excdesc}
+
+\begin{datadesc}{empty}
+The rectangle returned when some operations return an empty result.
+This makes it possible to quickly check whether a result is empty:
+
+\bcode\begin{verbatim}
+>>> import rect
+>>> r1 = (10, 20), (90, 80)
+>>> r2 = (0, 0), (10, 20)
+>>> r3 = rect.intersect([r1, r2])
+>>> if r3 is rect.empty: print 'Empty intersection'
+Empty intersection
+>>>
+\end{verbatim}\ecode
+\end{datadesc}
+
+\begin{funcdesc}{is_empty}{r}
+Returns true if the given rectangle is empty.
+A rectangle
+\code{(\var{left}, \var{top}), (\var{right}, \var{bottom})}
+is empty if
+\iftexi
+\code{\var{left} >= \var{right}} or \code{\var{top} => \var{bottom}}.
+\else
+$\var{left} \geq \var{right}$ or $\var{top} \geq \var{bottom}$.
+%%JHXXX{\em left~$\geq$~right} or {\em top~$\leq$~bottom}.
+\fi
+\end{funcdesc}
+
+\begin{funcdesc}{intersect}{list}
+Returns the intersection of all rectangles in the list argument.
+It may also be called with a tuple argument.
+Raises
+\code{rect.error}
+if the list is empty.
+Returns
+\code{rect.empty}
+if the intersection of the rectangles is empty.
+\end{funcdesc}
+
+\begin{funcdesc}{union}{list}
+Returns the smallest rectangle that contains all non-empty rectangles in
+the list argument.
+It may also be called with a tuple argument or with two or more
+rectangles as arguments.
+Returns
+\code{rect.empty}
+if the list is empty or all its rectangles are empty.
+\end{funcdesc}
+
+\begin{funcdesc}{pointinrect}{point\, rect}
+Returns true if the point is inside the rectangle.
+By definition, a point
+\code{(\var{h}, \var{v})}
+is inside a rectangle
+\code{(\var{left}, \var{top}), (\var{right}, \var{bottom})} if
+\iftexi
+\code{\var{left} <= \var{h} < \var{right}} and
+\code{\var{top} <= \var{v} < \var{bottom}}.
+\else
+$\var{left} \leq \var{h} < \var{right}$ and
+$\var{top} \leq \var{v} < \var{bottom}$.
+\fi
+\end{funcdesc}
+
+\begin{funcdesc}{inset}{rect\, \(dh\, dv\)}
+Returns a rectangle that lies inside the
+\code{rect}
+argument by
+\var{dh}
+pixels horizontally
+and
+\var{dv}
+pixels
+vertically.
+If
+\var{dh}
+or
+\var{dv}
+is negative, the result lies outside
+\var{rect}.
+\end{funcdesc}
+
+\begin{funcdesc}{rect2geom}{rect}
+Converts a rectangle to geometry representation:
+\code{(\var{left}, \var{top}), (\var{width}, \var{height})}.
+\end{funcdesc}
+
+\begin{funcdesc}{geom2rect}{geom}
+Converts a rectangle given in geometry representation back to the
+standard rectangle representation
+\code{(\var{left}, \var{top}), (\var{right}, \var{bottom})}.
+\end{funcdesc}