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% \documentstyle[11pt,twoside,manpage]{report}
% \begin{document}
% \date{November 25, 1990}
%
% \begin{titlepage}
% \vspace*{1.0in}
% \begin{flushright}
% {\huge\bf OIM C++ Library} \\[.25cm]
% {\rule[.1in]{4.5in}{.02in}}\\[.25cm]
% {\large\bf Reference Manual} \\[2.0cm]
% {\large\bf Version 1.0} \\[4.0cm]
% {\bf Rong Chen}\\[1.0cm]
% {Research Services}\\
% {Office for Information Management}\\
% {1407 W. Gregory Drive}\\
% {Urbana, IL 61801}\\
% {(217)--244--8538}\\
% \end{flushright}
% \end{titlepage}
%
% \pagenumbering{roman}
% \tableofcontents
%
% \chapter*{Preface}
%
% Object-oriented problem solving and object-oriented programming
% represent a way of thinking and a methodology for computer
% programming that are quite different from the traditional approaches
% supported by structured programming languages. The powerful
% features of object-oriented programming support the concepts that
% make computer problem solving a more human-like activity and
% that increase the re-usability of software code. As object-oriented
% languages become steadily available, object-oriented programming
% is becoming more and more popular among both system developers
% and application programmers.
%
% \newpage
%
% \raggedbottom
% \pagenumbering{arabic}
% \pagestyle{headings}
% \chapter*{Class Descriptions}
%
% \begin{manpage}{OIM C++ Library}{Choice}{Version 1.0}
%
% \subtitle{Name}
% Choice --- a set of boxes representing the choices available.
%
% \subtitle{Declaration}
% \#include \<choice.h\>
%
% \function{Choice(Point origin, Point corner,
% int foreground_color, int background_color,
% int frame_style, int space_in_between,
% int number_of_choices,
% const~char\* first_label, $...$ )}
% Constructs a choice object. Each choice object is a set of boxes
% representing the choices available. The "origin" and "corner"
% define the rectangular area inside which the boxes are displayed.
% The "space_in_between" (in pixels)
% defines the distance between two adjacent boxes. Depending on
% whether there is enough room to put all the choices horizontally
% or vertically in the designated area,
% the choices will be laid out accordingly. The
% attributes "foreground_color", "background_color" and "frame_style"
% define the colors for each box that represents each choice.
% The number of labels starting with "first_label" must match the
% number given by "number_of_choices". Each label is displayed within
% its corresponding box. The choices are displayed
% as soon as they are created.
%
% \function{Choice(int number_of_choices, Boolean is_horizontal = VERTICAL)}
% Constructs an array of choices or
% a choice object with boxes of different sizes. The attributes
% of the actual choices will be defined later using the
% addItem() operation. Note: It is forbidden to have arguments
% in the constructors of array objects in C++.
%
% \function{\~Choice()}
% Choice class has an empty destructor.
%
% \subtitle{Description}
% A Choice object is a set of related boxes. It is used to display
% multiple choices on the screen.
% A choice may either be selected by pressing a hot key
% (when mouse is not enabled) or by pressing a mouse button when the mouse
% cursor is within the intended choice box.
% The first highlighted character in the text label will be the
% hot key if the mouse is not enabled, otherwise, the highlighted
% character will have no effect. For example, label "@N@ext" designates
% "N" as the hot key for the button if the mouse is not enabled.
% By default, if the mouse driver is loaded before program execution,
% the mouse is enabled. When using the mouse to select
% a choice, the selection is immediate; a hot key must be confirmed
% by pressing ENTER (carriage return key). Arrow keys can also be used
% to move the current selection in the direction indicated by the arrows,
% this also requires an ENTER to confirm.
%
% \subtitle{Global \\ Variables}
% \variable{char host_name[20] = \"rose.cs.uiuc.edu\"}
% The "host_name" buffer is initialized to the current machine name
% before the main() function is executed. The machine name is
% usually declared in a DOS shell variable "OIMUSER".
%
% \variable{Boolean mouse_installed}
% By default, the "mouse_installed" variable is assigned to TRUE if
% the mouse driver has been installed before program execution;
% otherwise it is assigned to FALSE. The value may also be changed
% through enableMouse() and disableMouse() functions.
%
% \subtitle{Macros}
% \function{MAX({\it x}, {\it y})}
% Returns the maximum of the two comparable objects "x", and "y".
% This macro is often used to compare integers or real numbers.
%
% \function{MIN({\it x}, {\it y})}
% Returns the minimum of the two comparable objects "x", and "y".
% This macro is often used to compare integers or real numbers.
%
% \subtitle{Public \\ Operations}
% \function{void addItem(Point origin, Point corner,
% int foreground_color, int background_color,
% int frame_style, const~char\* label,
% int text_color = WHITE,
% int text_highlight_color = LIGHT_WHITE)}
% Defines the attributes of a choice box in the array declared by the
% Choice(int "number_of_choices", Boolean "is_horizontal" = VERTICAL)
% constructor. It must be called exactly "number_of_choices"
% times. The first call specifies the first choice, second call specifies
% the second choice, and so on. The attributes "origin" and "corner"
% define a box area where the choice item is located on the screen. Other
% attributes are self-explanatory. This call is particularly useful
% on program setup pages.
%
% \function{Boolean hasValue()}
% Returns TRUE if the designated choice object has been selected at
% least once. Graphically,
% it means one of the choices is rendered in reverse colors. It is
% sometimes necessary to check if all choice objects on a screen have
% been selected, so that a program can go on to the next page of screen.
% If a previous select() call is returned abnormally by pressing an ESC
% key, this function will return FALSE. Should this occur, the previous
% value, if any, will also be lost.
%
% \subtitle{Virtual \\ Operations}
%
% \function{void action(int status)}
% Defines the behaviors of the choice object when a choice handler
% has been bonded to the object. This function is called by the
% event handler when it detects that the choice object has been
% selected. The default action is to do nothing if no choice handler
% presents, otherwise, it invokes the choice handler
% and passes it along with the current status
% (whatever has been returned from a status() call).
% Do not modify this function unless it is absolutely necessary because
% it redefines the semantics of all choice objects.
%
% \function{void bind(void \hbox{\rm (\*{\it handler})(int)})}
% Associates a choice handler function with the choice object. Every
% time this choice object is invoked, the choice handler is called
% immediately.
% The handler is passed along with the current "status"
% (return value of status() call) as its argument. The default
% action taken by the event handler can be modified by changing
% the next function action().
%
% \function{Boolean isSelected(Point cursor)}
% Returns TRUE if a legal hot key is pressed for the
% the indicated choice object. It also returns TRUE if
% a mouse button is pressed within the range of the choice object area.
% This call is used by the event handler to check if this choice object
% has been selected. It is hardly needed in regular applications.
% The "cursor" is for mouse cursor in mouse mode or faked with the
% current keyboard input as the cursor's x coordinate.
%
% \subtitle{See Also}
% Event, Button, Box
%
% \subtitle{Author}
% Rong Chen at the Office for Information Management, UIUC. 9-1-89.
%
% \end{manpage}
% \newpage
% \begin{verbatim}
% #include <stdlib.h>
% #include "choice.h"
%
% void handler1(int pick) {
% Box box(500, 30, 600, 60, LIGHT_CYAN, LIGHT_MAGENTA);
% box << pick + 1;
% }
%
% void handler2(int pick) {
% Box box(500, 30, 600, 60, LIGHT_CYAN, LIGHT_MAGENTA);
% box << (pick==0 ? "Ape" : (pick==1 ? "Bob" : "Car"));
% }
%
% void handler3(int pick) {
% Box box(500, 30, 600, 60, LIGHT_CYAN, LIGHT_MAGENTA);
% switch (pick) {
% case 0: box << "D"; break; case 1: box << "E"; break;
% case 2: box << "F"; break; case 3: box << "G"; break;
% case 4: exit(0);
% }
% }
%
% main() {
% Point a(100, 100), b(220, 130);
% Choice c1(a, b, BROWN, RED, ON_BORDER, 0, 4,
% "@1@", "@2@", "@3@", "@4@");
% Choice c2(3, HORIZONTAL);
% c2.addItem(Point(200, 200), Point(260,230),
% WHITE, BLUE, IN_BORDER, "@A@pe");
% c2.addItem(Point(270, 200), Point(330,230),
% WHITE, BLUE, IN_BORDER, "@B@ob");
% c2.addItem(Point(340, 200), Point(400,230),
% WHITE, BLUE, IN_BORDER, "@C@ar");
% a = Point(500, 230); b = Point(550, 330);
% Choice c3(a, b, GREEN, GRAY, NO_BORDER, 10, 5,
% "@D@", "@E@", "@F@", "@G@", "@H@");
% c1.bind(handler1);
% c2.bind(handler2);
% c3.bind(handler3);
%
% waitForEvents();
% }
% \end{verbatim}
%
% \end{document}
%===========================[End of sample.tex]=============================
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