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* @Id: curs_mouse.3x,v 1.24 2003/12/27 18:47:54 tom Exp @
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<H1>curs_mouse 3x</H1>
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<PRE>
<!-- Manpage converted by man2html 3.0.1 -->
<STRONG><A HREF="curs_mouse.3x.html">curs_mouse(3x)</A></STRONG> <STRONG><A HREF="curs_mouse.3x.html">curs_mouse(3x)</A></STRONG>
</PRE>
<H2>NAME</H2><PRE>
<STRONG>getmouse</STRONG>, <STRONG>ungetmouse</STRONG>, <STRONG>mousemask</STRONG>, <STRONG>wenclose</STRONG>, <STRONG>mouse_trafo</STRONG>,
<STRONG>wmouse_trafo</STRONG>, <STRONG>mouseinterval</STRONG> - mouse interface through
curses
</PRE>
<H2>SYNOPSIS</H2><PRE>
<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
<STRONG>typedef</STRONG> <STRONG>unsigned</STRONG> <STRONG>long</STRONG> <STRONG>mmask_t;</STRONG>
typedef struct
{
short id; <EM>/*</EM> <EM>ID</EM> <EM>to</EM> <EM>distinguish</EM> <EM>multiple</EM> <EM>devices</EM> <EM>*/</EM>
<STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>y,</STRONG> <STRONG>z;</STRONG> <EM>/*</EM> <EM>event</EM> <EM>coordinates</EM> <EM>*/</EM>
<STRONG>mmask_t</STRONG> <STRONG>bstate;</STRONG> <EM>/*</EM> <EM>button</EM> <EM>state</EM> <EM>bits</EM> <EM>*/</EM>
<STRONG>}</STRONG>
<STRONG>MEVENT;</STRONG>
<STRONG>int</STRONG> <STRONG>getmouse(MEVENT</STRONG> <STRONG>*event);</STRONG>
<STRONG>int</STRONG> <STRONG>ungetmouse(MEVENT</STRONG> <STRONG>*event);</STRONG>
<STRONG>mmask_t</STRONG> <STRONG>mousemask(mmask_t</STRONG> <STRONG>newmask,</STRONG> <STRONG>mmask_t</STRONG> <STRONG>*oldmask);</STRONG>
<STRONG>bool</STRONG> <STRONG>wenclose(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*win,</STRONG> <STRONG>int</STRONG> <STRONG>y,</STRONG> <STRONG>int</STRONG> <STRONG>x);</STRONG>
<STRONG>bool</STRONG> <STRONG>mouse_trafo(int*</STRONG> <STRONG>pY,</STRONG> <STRONG>int*</STRONG> <STRONG>pX,</STRONG> <STRONG>bool</STRONG> <STRONG>to_screen);</STRONG>
<STRONG>bool</STRONG> <STRONG>wmouse_trafo(const</STRONG> <STRONG>WINDOW*</STRONG> <STRONG>win,</STRONG> <STRONG>int*</STRONG> <STRONG>pY,</STRONG> <STRONG>int*</STRONG> <STRONG>pX,</STRONG>
<STRONG>bool</STRONG> <STRONG>to_screen);</STRONG>
<STRONG>int</STRONG> <STRONG>mouseinterval(int</STRONG> <STRONG>erval);</STRONG>
</PRE>
<H2>DESCRIPTION</H2><PRE>
These functions provide an interface to mouse events from
<STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>. Mouse events are represented by <STRONG>KEY_MOUSE</STRONG>
pseudo-key values in the <STRONG>wgetch</STRONG> input stream.
To make mouse events visible, use the <STRONG>mousemask</STRONG> function.
This will set the mouse events to be reported. By
default, no mouse events are reported. The function will
return a mask to indicate which of the specified mouse
events can be reported; on complete failure it returns 0.
If oldmask is non-NULL, this function fills the indicated
location with the previous value of the given window's
mouse event mask.
As a side effect, setting a zero mousemask may turn off
the mouse pointer; setting a nonzero mask may turn it on.
Whether this happens is device-dependent.
Here are the mouse event type masks:
<EM>Name</EM> <EM>Description</EM>
---------------------------------------------------------------------
BUTTON1_PRESSED mouse button 1 down
BUTTON1_RELEASED mouse button 1 up
BUTTON1_CLICKED mouse button 1 clicked
BUTTON1_DOUBLE_CLICKED mouse button 1 double clicked
BUTTON1_TRIPLE_CLICKED mouse button 1 triple clicked
BUTTON2_PRESSED mouse button 2 down
BUTTON2_RELEASED mouse button 2 up
BUTTON2_CLICKED mouse button 2 clicked
BUTTON2_DOUBLE_CLICKED mouse button 2 double clicked
BUTTON2_TRIPLE_CLICKED mouse button 2 triple clicked
BUTTON3_PRESSED mouse button 3 down
BUTTON3_RELEASED mouse button 3 up
BUTTON3_CLICKED mouse button 3 clicked
BUTTON3_DOUBLE_CLICKED mouse button 3 double clicked
BUTTON3_TRIPLE_CLICKED mouse button 3 triple clicked
BUTTON4_PRESSED mouse button 4 down
BUTTON4_RELEASED mouse button 4 up
BUTTON4_CLICKED mouse button 4 clicked
BUTTON4_DOUBLE_CLICKED mouse button 4 double clicked
BUTTON4_TRIPLE_CLICKED mouse button 4 triple clicked
BUTTON_SHIFT shift was down during button state change
BUTTON_CTRL control was down during button state change
BUTTON_ALT alt was down during button state change
ALL_MOUSE_EVENTS report all button state changes
REPORT_MOUSE_POSITION report mouse movement
Once a class of mouse events have been made visible in a
window, calling the <STRONG>wgetch</STRONG> function on that window may
return <STRONG>KEY_MOUSE</STRONG> as an indicator that a mouse event has
been queued. To read the event data and pop the event off
the queue, call <STRONG>getmouse</STRONG>. This function will return <STRONG>OK</STRONG> if
a mouse event is actually visible in the given window, <STRONG>ERR</STRONG>
otherwise. When <STRONG>getmouse</STRONG> returns <STRONG>OK</STRONG>, the data deposited
as y and x in the event structure coordinates will be
screen-relative character-cell coordinates. The returned
state mask will have exactly one bit set to indicate the
event type.
The <STRONG>ungetmouse</STRONG> function behaves analogously to <STRONG>ungetch</STRONG>.
It pushes a <STRONG>KEY_MOUSE</STRONG> event onto the input queue, and
associates with that event the given state data and
screen-relative character-cell coordinates.
The <STRONG>wenclose</STRONG> function tests whether a given pair of
screen-relative character-cell coordinates is enclosed by
a given window, returning TRUE if it is and FALSE other-
wise. It is useful for determining what subset of the
screen windows enclose the location of a mouse event.
The <STRONG>wmouse_trafo</STRONG> function transforms a given pair of coor-
dinates from stdscr-relative coordinates to screen-rela-
tive coordinates or vice versa. Please remember, that
stdscr-relative coordinates are not always identical to
screen-relative coordinates due to the mechanism to
reserve lines on top or bottom of the screen for other
purposes (ripoff() call, see also slk_... functions). If
the parameter <STRONG>to_screen</STRONG> is <STRONG>TRUE</STRONG>, the pointers <STRONG>pY,</STRONG> <STRONG>pX</STRONG> must
reference the coordinates of a location inside the window
<STRONG>win</STRONG>. They are converted to screen-relative coordinates
and returned through the pointers. If the conversion was
successful, the function returns <STRONG>TRUE</STRONG>. If one of the
parameters was NULL or the location is not inside the win-
dow, <STRONG>FALSE</STRONG> is returned. If <STRONG>to_screen</STRONG> is <STRONG>FALSE</STRONG>, the point-
ers <STRONG>pY,</STRONG> <STRONG>pX</STRONG> must reference screen-relative coordinates.
They are converted to stdscr-relative coordinates if the
window <STRONG>win</STRONG> encloses this point. In this case the function
returns <STRONG>TRUE</STRONG>. If one of the parameters is NULL or the
point is not inside the window, <STRONG>FALSE</STRONG> is returned. Please
notice, that the referenced coordinates are only replaced
by the converted coordinates if the transformation was
successful.
The <STRONG>mouseinterval</STRONG> function sets the maximum time (in thou-
sands of a second) that can elapse between press and
release events for them to be recognized as a click. Use
<STRONG>mouseinterval(-1)</STRONG> to disable click resolution. This func-
tion returns the previous interval value. The default is
one sixth of a second.
Note that mouse events will be ignored when input is in
cooked mode, and will cause an error beep when cooked mode
is being simulated in a window by a function such as <STRONG>get-</STRONG>
<STRONG>str</STRONG> that expects a linefeed for input-loop termination.
</PRE>
<H2>RETURN VALUE</H2><PRE>
<STRONG>getmouse</STRONG>, <STRONG>ungetmouse</STRONG> and <STRONG>mouseinterval</STRONG> return the integer
<STRONG>ERR</STRONG> upon failure or <STRONG>OK</STRONG> upon successful completion. <STRONG>mouse-</STRONG>
<STRONG>mask</STRONG> returns the mask of reportable events. <STRONG>wenclose</STRONG> and
<STRONG>wmouse_trafo</STRONG> are boolean functions returning <STRONG>TRUE</STRONG> or <STRONG>FALSE</STRONG>
depending on their test result.
</PRE>
<H2>PORTABILITY</H2><PRE>
These calls were designed for <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>, and are not
found in SVr4 curses, 4.4BSD curses, or any other previous
version of curses.
The feature macro <STRONG>NCURSES_MOUSE_VERSION</STRONG> is provided so the
preprocessor can be used to test whether these features
are present (its value is 1). If the interface is
changed, the value of <STRONG>NCURSES_MOUSE_VERSION</STRONG> will be incre-
mented.
The order of the <STRONG>MEVENT</STRONG> structure members is not guaran-
teed. Additional fields may be added to the structure in
the future.
Under <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>, these calls are implemented using
either xterm's built-in mouse-tracking API or platform-
specific drivers including
Alessandro Rubini's gpm server.
FreeBSD sysmouse
OS/2 EMX
If you are using an unsupported configuration, mouse
events will not be visible to <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG> (and the <STRONG>wmouse-</STRONG>
<STRONG>mask</STRONG> function will always return <STRONG>0</STRONG>).
If the terminfo entry contains a <STRONG>XM</STRONG> string, this is used
in the xterm mouse driver to control the way the terminal
is initialized for mouse operation. The default, if <STRONG>XM</STRONG> is
not found, corresponds to private mode 1000 of xterm:
\E[?1000%?%p1%{1}%=%th%el%;
The z member in the event structure is not presently used.
It is intended for use with touch screens (which may be
pressure-sensitive) or with 3D-mice/trackballs/power
gloves.
</PRE>
<H2>BUGS</H2><PRE>
Mouse events under xterm will not in fact be ignored dur-
ing cooked mode, if they have been enabled by <STRONG>wmousemask</STRONG>.
Instead, the xterm mouse report sequence will appear in
the string read.
Mouse events under xterm will not be detected correctly in
a window with its keypad bit off, since they are inter-
preted as a variety of function key. Your terminfo
description must have <STRONG>kmous</STRONG> set to "\E[M" (the beginning
of the response from xterm for mouse clicks).
Because there are no standard terminal responses that
would serve to identify terminals which support the xterm
mouse protocol, <STRONG>ncurses</STRONG> assumes that if your $TERM envi-
ronment variable contains "xterm", or <STRONG>kmous</STRONG> is defined in
the terminal description, then the terminal may send mouse
events.
</PRE>
<H2>SEE ALSO</H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>.
<STRONG><A HREF="curs_mouse.3x.html">curs_mouse(3x)</A></STRONG>
</PRE>
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