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-\section{Built-in Module \module{fl}}
-\label{module-fl}
-\bimodindex{fl}
-
-This module provides an interface to the FORMS Library\index{FORMS
-Library} by Mark Overmars\index{Overmars, Mark}. The source for the
-library can be retrieved by anonymous ftp from host
-\samp{ftp.cs.ruu.nl}, directory \file{SGI/FORMS}. It was last tested
-with version 2.0b.
-
-Most functions are literal translations of their \C{} equivalents,
-dropping the initial \samp{fl_} from their name. Constants used by
-the library are defined in module \module{FL} described below.
-
-The creation of objects is a little different in Python than in C:
-instead of the `current form' maintained by the library to which new
-FORMS objects are added, all functions that add a FORMS object to a
-form are methods of the Python object representing the form.
-Consequently, there are no Python equivalents for the C functions
-\cfunction{fl_addto_form()} and \cfunction{fl_end_form()}, and the
-equivalent of \cfunction{fl_bgn_form()} is called
-\function{fl.make_form()}.
-
-Watch out for the somewhat confusing terminology: FORMS uses the word
-\dfn{object} for the buttons, sliders etc. that you can place in a form.
-In Python, `object' means any value. The Python interface to FORMS
-introduces two new Python object types: form objects (representing an
-entire form) and FORMS objects (representing one button, slider etc.).
-Hopefully this isn't too confusing.
-
-There are no `free objects' in the Python interface to FORMS, nor is
-there an easy way to add object classes written in Python. The FORMS
-interface to GL event handling is available, though, so you can mix
-FORMS with pure GL windows.
-
-\strong{Please note:} importing \module{fl} implies a call to the GL
-function \cfunction{foreground()} and to the FORMS routine
-\cfunction{fl_init()}.
-
-\subsection{Functions Defined in Module \module{fl}}
-\nodename{FL Functions}
-
-Module \module{fl} defines the following functions. For more
-information about what they do, see the description of the equivalent
-\C{} function in the FORMS documentation:
-
-\begin{funcdesc}{make_form}{type, width, height}
-Create a form with given type, width and height. This returns a
-\dfn{form} object, whose methods are described below.
-\end{funcdesc}
-
-\begin{funcdesc}{do_forms}{}
-The standard FORMS main loop. Returns a Python object representing
-the FORMS object needing interaction, or the special value
-\constant{FL.EVENT}.
-\end{funcdesc}
-
-\begin{funcdesc}{check_forms}{}
-Check for FORMS events. Returns what \function{do_forms()} above
-returns, or \code{None} if there is no event that immediately needs
-interaction.
-\end{funcdesc}
-
-\begin{funcdesc}{set_event_call_back}{function}
-Set the event callback function.
-\end{funcdesc}
-
-\begin{funcdesc}{set_graphics_mode}{rgbmode, doublebuffering}
-Set the graphics modes.
-\end{funcdesc}
-
-\begin{funcdesc}{get_rgbmode}{}
-Return the current rgb mode. This is the value of the \C{} global
-variable \cdata{fl_rgbmode}.
-\end{funcdesc}
-
-\begin{funcdesc}{show_message}{str1, str2, str3}
-Show a dialog box with a three-line message and an OK button.
-\end{funcdesc}
-
-\begin{funcdesc}{show_question}{str1, str2, str3}
-Show a dialog box with a three-line message and YES and NO buttons.
-It returns \code{1} if the user pressed YES, \code{0} if NO.
-\end{funcdesc}
-
-\begin{funcdesc}{show_choice}{str1, str2, str3, but1\optional{,
- but2\optional{, but3}}}
-Show a dialog box with a three-line message and up to three buttons.
-It returns the number of the button clicked by the user
-(\code{1}, \code{2} or \code{3}).
-\end{funcdesc}
-
-\begin{funcdesc}{show_input}{prompt, default}
-Show a dialog box with a one-line prompt message and text field in
-which the user can enter a string. The second argument is the default
-input string. It returns the string value as edited by the user.
-\end{funcdesc}
-
-\begin{funcdesc}{show_file_selector}{message, directory, pattern, default}
-Show a dialog box in which the user can select a file. It returns
-the absolute filename selected by the user, or \code{None} if the user
-presses Cancel.
-\end{funcdesc}
-
-\begin{funcdesc}{get_directory}{}
-\funcline{get_pattern}{}
-\funcline{get_filename}{}
-These functions return the directory, pattern and filename (the tail
-part only) selected by the user in the last
-\function{show_file_selector()} call.
-\end{funcdesc}
-
-\begin{funcdesc}{qdevice}{dev}
-\funcline{unqdevice}{dev}
-\funcline{isqueued}{dev}
-\funcline{qtest}{}
-\funcline{qread}{}
-%\funcline{blkqread}{?}
-\funcline{qreset}{}
-\funcline{qenter}{dev, val}
-\funcline{get_mouse}{}
-\funcline{tie}{button, valuator1, valuator2}
-These functions are the FORMS interfaces to the corresponding GL
-functions. Use these if you want to handle some GL events yourself
-when using \function{fl.do_events()}. When a GL event is detected that
-FORMS cannot handle, \function{fl.do_forms()} returns the special value
-\constant{FL.EVENT} and you should call \function{fl.qread()} to read
-the event from the queue. Don't use the equivalent GL functions!
-\end{funcdesc}
-
-\begin{funcdesc}{color}{}
-\funcline{mapcolor}{}
-\funcline{getmcolor}{}
-See the description in the FORMS documentation of
-\cfunction{fl_color()}, \cfunction{fl_mapcolor()} and
-\cfunction{fl_getmcolor()}.
-\end{funcdesc}
-
-\subsection{Form Objects}
-\label{form-objects}
-
-Form objects (returned by \function{make_form()} above) have the
-following methods. Each method corresponds to a \C{} function whose
-name is prefixed with \samp{fl_}; and whose first argument is a form
-pointer; please refer to the official FORMS documentation for
-descriptions.
-
-All the \method{add_*()} methods return a Python object representing
-the FORMS object. Methods of FORMS objects are described below. Most
-kinds of FORMS object also have some methods specific to that kind;
-these methods are listed here.
-
-\begin{flushleft}
-
-\begin{methoddesc}[form]{show_form}{placement, bordertype, name}
- Show the form.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{hide_form}{}
- Hide the form.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{redraw_form}{}
- Redraw the form.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{set_form_position}{x, y}
-Set the form's position.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{freeze_form}{}
-Freeze the form.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{unfreeze_form}{}
- Unfreeze the form.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{activate_form}{}
- Activate the form.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{deactivate_form}{}
- Deactivate the form.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{bgn_group}{}
- Begin a new group of objects; return a group object.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{end_group}{}
- End the current group of objects.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{find_first}{}
- Find the first object in the form.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{find_last}{}
- Find the last object in the form.
-\end{methoddesc}
-
-%---
-
-\begin{methoddesc}[form]{add_box}{type, x, y, w, h, name}
-Add a box object to the form.
-No extra methods.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{add_text}{type, x, y, w, h, name}
-Add a text object to the form.
-No extra methods.
-\end{methoddesc}
-
-%\begin{methoddesc}[form]{add_bitmap}{type, x, y, w, h, name}
-%Add a bitmap object to the form.
-%\end{methoddesc}
-
-\begin{methoddesc}[form]{add_clock}{type, x, y, w, h, name}
-Add a clock object to the form. \\
-Method:
-\method{get_clock()}.
-\end{methoddesc}
-
-%---
-
-\begin{methoddesc}[form]{add_button}{type, x, y, w, h, name}
-Add a button object to the form. \\
-Methods:
-\method{get_button()},
-\method{set_button()}.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{add_lightbutton}{type, x, y, w, h, name}
-Add a lightbutton object to the form. \\
-Methods:
-\method{get_button()},
-\method{set_button()}.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{add_roundbutton}{type, x, y, w, h, name}
-Add a roundbutton object to the form. \\
-Methods:
-\method{get_button()},
-\method{set_button()}.
-\end{methoddesc}
-
-%---
-
-\begin{methoddesc}[form]{add_slider}{type, x, y, w, h, name}
-Add a slider object to the form. \\
-Methods:
-\method{set_slider_value()},
-\method{get_slider_value()},
-\method{set_slider_bounds()},
-\method{get_slider_bounds()},
-\method{set_slider_return()},
-\method{set_slider_size()},
-\method{set_slider_precision()},
-\method{set_slider_step()}.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{add_valslider}{type, x, y, w, h, name}
-Add a valslider object to the form. \\
-Methods:
-\method{set_slider_value()},
-\method{get_slider_value()},
-\method{set_slider_bounds()},
-\method{get_slider_bounds()},
-\method{set_slider_return()},
-\method{set_slider_size()},
-\method{set_slider_precision()},
-\method{set_slider_step()}.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{add_dial}{type, x, y, w, h, name}
-Add a dial object to the form. \\
-Methods:
-\method{set_dial_value()},
-\method{get_dial_value()},
-\method{set_dial_bounds()},
-\method{get_dial_bounds()}.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{add_positioner}{type, x, y, w, h, name}
-Add a positioner object to the form. \\
-Methods:
-\method{set_positioner_xvalue()},
-\method{set_positioner_yvalue()},
-\method{set_positioner_xbounds()},
-\method{set_positioner_ybounds()},
-\method{get_positioner_xvalue()},
-\method{get_positioner_yvalue()},
-\method{get_positioner_xbounds()},
-\method{get_positioner_ybounds()}.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{add_counter}{type, x, y, w, h, name}
-Add a counter object to the form. \\
-Methods:
-\method{set_counter_value()},
-\method{get_counter_value()},
-\method{set_counter_bounds()},
-\method{set_counter_step()},
-\method{set_counter_precision()},
-\method{set_counter_return()}.
-\end{methoddesc}
-
-%---
-
-\begin{methoddesc}[form]{add_input}{type, x, y, w, h, name}
-Add a input object to the form. \\
-Methods:
-\method{set_input()},
-\method{get_input()},
-\method{set_input_color()},
-\method{set_input_return()}.
-\end{methoddesc}
-
-%---
-
-\begin{methoddesc}[form]{add_menu}{type, x, y, w, h, name}
-Add a menu object to the form. \\
-Methods:
-\method{set_menu()},
-\method{get_menu()},
-\method{addto_menu()}.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{add_choice}{type, x, y, w, h, name}
-Add a choice object to the form. \\
-Methods:
-\method{set_choice()},
-\method{get_choice()},
-\method{clear_choice()},
-\method{addto_choice()},
-\method{replace_choice()},
-\method{delete_choice()},
-\method{get_choice_text()},
-\method{set_choice_fontsize()},
-\method{set_choice_fontstyle()}.
-\end{methoddesc}
-
-\begin{methoddesc}[form]{add_browser}{type, x, y, w, h, name}
-Add a browser object to the form. \\
-Methods:
-\method{set_browser_topline()},
-\method{clear_browser()},
-\method{add_browser_line()},
-\method{addto_browser()},
-\method{insert_browser_line()},
-\method{delete_browser_line()},
-\method{replace_browser_line()},
-\method{get_browser_line()},
-\method{load_browser()},
-\method{get_browser_maxline()},
-\method{select_browser_line()},
-\method{deselect_browser_line()},
-\method{deselect_browser()},
-\method{isselected_browser_line()},
-\method{get_browser()},
-\method{set_browser_fontsize()},
-\method{set_browser_fontstyle()},
-\method{set_browser_specialkey()}.
-\end{methoddesc}
-
-%---
-
-\begin{methoddesc}[form]{add_timer}{type, x, y, w, h, name}
-Add a timer object to the form. \\
-Methods:
-\method{set_timer()},
-\method{get_timer()}.
-\end{methoddesc}
-\end{flushleft}
-
-Form objects have the following data attributes; see the FORMS
-documentation:
-
-\begin{tableiii}{l|l|l}{member}{Name}{C Type}{Meaning}
- \lineiii{window}{int (read-only)}{GL window id}
- \lineiii{w}{float}{form width}
- \lineiii{h}{float}{form height}
- \lineiii{x}{float}{form x origin}
- \lineiii{y}{float}{form y origin}
- \lineiii{deactivated}{int}{nonzero if form is deactivated}
- \lineiii{visible}{int}{nonzero if form is visible}
- \lineiii{frozen}{int}{nonzero if form is frozen}
- \lineiii{doublebuf}{int}{nonzero if double buffering on}
-\end{tableiii}
-
-\subsection{FORMS Objects}
-\label{forms-objects}
-
-Besides methods specific to particular kinds of FORMS objects, all
-FORMS objects also have the following methods:
-
-\begin{methoddesc}[FORMS object]{set_call_back}{function, argument}
-Set the object's callback function and argument. When the object
-needs interaction, the callback function will be called with two
-arguments: the object, and the callback argument. (FORMS objects
-without a callback function are returned by \function{fl.do_forms()}
-or \function{fl.check_forms()} when they need interaction.) Call this
-method without arguments to remove the callback function.
-\end{methoddesc}
-
-\begin{methoddesc}[FORMS object]{delete_object}{}
- Delete the object.
-\end{methoddesc}
-
-\begin{methoddesc}[FORMS object]{show_object}{}
- Show the object.
-\end{methoddesc}
-
-\begin{methoddesc}[FORMS object]{hide_object}{}
- Hide the object.
-\end{methoddesc}
-
-\begin{methoddesc}[FORMS object]{redraw_object}{}
- Redraw the object.
-\end{methoddesc}
-
-\begin{methoddesc}[FORMS object]{freeze_object}{}
- Freeze the object.
-\end{methoddesc}
-
-\begin{methoddesc}[FORMS object]{unfreeze_object}{}
- Unfreeze the object.
-\end{methoddesc}
-
-%\begin{methoddesc}[FORMS object]{handle_object}{} XXX
-%\end{methoddesc}
-
-%\begin{methoddesc}[FORMS object]{handle_object_direct}{} XXX
-%\end{methoddesc}
-
-FORMS objects have these data attributes; see the FORMS documentation:
-
-\begin{tableiii}{l|l|l}{member}{Name}{C Type}{Meaning}
- \lineiii{objclass}{int (read-only)}{object class}
- \lineiii{type}{int (read-only)}{object type}
- \lineiii{boxtype}{int}{box type}
- \lineiii{x}{float}{x origin}
- \lineiii{y}{float}{y origin}
- \lineiii{w}{float}{width}
- \lineiii{h}{float}{height}
- \lineiii{col1}{int}{primary color}
- \lineiii{col2}{int}{secondary color}
- \lineiii{align}{int}{alignment}
- \lineiii{lcol}{int}{label color}
- \lineiii{lsize}{float}{label font size}
- \lineiii{label}{string}{label string}
- \lineiii{lstyle}{int}{label style}
- \lineiii{pushed}{int (read-only)}{(see FORMS docs)}
- \lineiii{focus}{int (read-only)}{(see FORMS docs)}
- \lineiii{belowmouse}{int (read-only)}{(see FORMS docs)}
- \lineiii{frozen}{int (read-only)}{(see FORMS docs)}
- \lineiii{active}{int (read-only)}{(see FORMS docs)}
- \lineiii{input}{int (read-only)}{(see FORMS docs)}
- \lineiii{visible}{int (read-only)}{(see FORMS docs)}
- \lineiii{radio}{int (read-only)}{(see FORMS docs)}
- \lineiii{automatic}{int (read-only)}{(see FORMS docs)}
-\end{tableiii}
-
-\section{Standard Module \module{FL}}
-\label{module-FLuppercase}
-\stmodindex{FL}
-
-This module defines symbolic constants needed to use the built-in
-module \module{fl} (see above); they are equivalent to those defined in
-the \C{} header file \code{<forms.h>} except that the name prefix
-\samp{FL_} is omitted. Read the module source for a complete list of
-the defined names. Suggested use:
-
-\begin{verbatim}
-import fl
-from FL import *
-\end{verbatim}
-
-\section{Standard Module \module{flp}}
-\label{module-flp}
-\stmodindex{flp}
-
-This module defines functions that can read form definitions created
-by the `form designer' (\program{fdesign}) program that comes with the
-FORMS library (see module \module{fl} above).
-
-For now, see the file \file{flp.doc} in the Python library source
-directory for a description.
-
-XXX A complete description should be inserted here!