World(3I)
NAME
World - control a display
SYNOPSIS
#include <InterViews/world.h>
DESCRIPTION
A world was an application's connection to a particular display. It is currently provided for backward compatibility.
PUBLIC OPERATIONS
World(
const char* classname, int& argc, char** argv
OptionDesc* = nil, PropertyData* = nil
)
Construct the world object for a display. The world's instance
name comes from the -name option if it was given; otherwise the
instance name comes from the environment variable RESOURCE_NAME
if it is nonnil. If the name has still not been defined, then
argv[0] with all leading directories stripped is used. The
following arguments are interpreted automatically and are
removed from argv:
-background next argument sets the background color
-bg same as -background
-display next argument specifies the target workstation display
-foreground next argument sets the foreground color
-fg same as -foreground
-fn same as -font
-font next argument sets the text font
-geometry next argument sets the first top-level interactor's position and size
-iconic starts up the first top-level interactor in iconic form
-name next argument sets the instance name of all top-level interactors
that don't have their own instance names
-reverse swaps default foreground and background colors
-rv same as -reverse
-synchronous force synchronous operation with the window system
-title next argument sets the first top-level interactor's title bar name
-xrm next argument sets an ``attribute: value'' property
The geometry specification has the form ``=WxH+XOFF+YOFF''. A negative
XOFF (YOFF) specifies the offset of the interactor's right (bottom)
edge from the right (bottom) side of the screen. The constructor sets
argc to the number of uninterpreted arguments that remain.
If non-nil, the OptionDesc* parameter is an array of option descriptors
used to parse application-specific attributes. OptionDesc contains
four fields: a name used on the command line, a path specifying the
attribute, a style specifying where the value is, and a default value.
Valid styles are OptionPropertyNext (use next argument as an
attribute:value pair, not just the value), OptionValueNext (use next
argument as value), OptionValueImplicit (use default value),
OptionValueIsArg (use argument as value), and OptionValueAfter (use
remainder of argument as value). If non-nil, the PropertyData*
parameter is an array of structures that each contain three string
fields: a path specifying the attribute, a value specifying the value,
and a type specifying the type name. Attributes are entered in the
following order: first any application defaults (specified by the
PropertyData array), then application defaults from /usr/lib/X11/app-
defaults/classname, then user defaults (usually in $HOME/.Xdefaults),
and finally command-line arguments. Thus, command-line arguments
override user defaults, and both override application defaults.
const char* name()
Return the instance name associated with the world.
const char* classname()
Return the class name associated with the world.
int argc()
Return the number of arguments passed to the world (not counting
those that were interpreted by the constructor).
char** argv()
Return the argument vector passed to the world.
Font* font()
Return the default font associated with the display. If a value
for ``font'' is defined at the top-level of the property sheet,
then it is used. Otherwise, a system default is used.
Color* foreground()
Return the default foreground color associated with the display.
If a value for ``foreground'' is defined at the top-level of the
property sheet, then it is used. Otherwise, a system default is
used.
Color* background()
Return the default background color associated with the display.
If a value for ``background'' is defined at the top-level of the
property sheet, then it is used. Otherwise, a system default is
used.
boolean shaped_windows()
Return whether the display supports non-rectangular windows.
boolean double_buffered()
Return whether windows on the display should by default be
double-buffered.
virtual void flush()
Repair all damaged windows on the display and then send any
pending requests to the window system.
virtual void sync()
Repair all damaged windows on the display, send any pending
requests to the window system, and wait for an acknowledgement
from the window system.
Coord width()
Return the width in coordinates of the current screen associated
with the display.
Coord height()
Return the height in coordinates of the current screen
associated with the display.
virtual void run()
Read events from the display, handling them as they arrive, and
stopping when quit is called.
virtual void quit()
Terminate the run loop.
virtual boolean pending()
Return whether any events are waiting to be read.
virtual void read(Event&)
Read the next event from the world associated with the event.
virtual boolean read(long sec, long usec, Event&)
Read the next event from the world associated with the event,
but do not wait more than sec seconds and usec microseconds.
Return whether an event was found in the given time.
virtual void unread(Event&)
Put the event back on the input queue for the world associated
with the event.
virtual void poll(Event&)
Set the event to an artificial motion event based on the current
pointer position and the state of the buttons and meta-keys.
virtual void SetScreen(int s) Set the current screen to s.
static World* current()
Return the current world. The current world is set when a world
is created or an event is received for the display associated
with a world.
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