Event(3X) manual page
Table of Contents
Event - representation of input events
#include <ivplus/event.h>
Event describes the state of input devices at the time an input
event occurred. Each event is placed into a global queue which is available
to all interactors and the world through calls to Read(). Keyboard events
are subject to modification by the virtual key binding mechanism prior
to being seen by an application (see VirtualBindings(3X)
for a description
of Motif virtual key bindings). If an incoming key event corresponds to
a Motif virtual binding, the keysym and keystring will be replaced with
their corresponding Motif equivalent. This mechanism will reset any modifiers
which were used to match the Motif binding.
There are a number of input
event types which may occur. See "PUBLIC DATA"
below for a complete list
of the event types.
Event
Creates an
event with no useful information.
Creates a copy of the indicated
event.
MotionEvent, // mouse movedDownEvent, // button pressedUpEvent, //
button releasedKeyEvent, // key pressed, interpreted as asciiEnterEvent, //
mouse enters canvasLeaveEvent, // mouse leaves canvasFocusInEvent, // gain
keyboard focusFocusOutEvent, // lose keyboard focusDeleteWindowEvent, //
ICCCM window manager WM_DELETE_WINDOWCheckpointEvent, // ICCCM window
manager WM_SAVE_YOURSELFNoEvent // ignore this event};
These
represent every kind of event that may be encountered in InterViews Plus.
TimerEvent and ChannelEvent functionality has been moved to Dispatcher.
See Dispatcher(3X)
for a description.
These represent
which of the left, middle, or right mouse buttons were pressed. The same
information is available through leftmouse, middlemouse, and rightmouse
below.
Points to the lowest-level interactor which indicated
interest in this type of event. See Sensor(3X)
for an explanation for expressing
event interest.
Represents the number of milliseconds
since the X server was reset.
Represents which type
of event this is.
Location of mouse relative to target. A
location of <0, 0> indicates the mouse is at the lower left corner of the
target.
These will be true if
the corresponding key or button was down at the time this event occurred.
The number of the button pressed or released, if
any. Returns one of LEFTMOUSE,
MIDDLEMOUSE,
or RIGHTMOUSE
based on which
mouse button was pressed or released.
The length of the
ASCII
string representing the key.
ASCII
interpretation
of the event, if any.
X keysym value for this key.
Return the world coordinates associated with this event.
The second version also returns a pointer to the world in which this event
occurred.
Returns the string associated with the
keysym.
Returns a pointer to the EventRep for the
event. The EventRep class is a low level interface to X Windows. It is not
expected that developers will need details of the EventRep interface so
the EventRep class is not documented.
None.
None.
None.
event.h
Interactor(3X)
, Sensor(3X)
, VirtualBindings(3X)
, World(3X)
.
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