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* @Id: curs_mouse.3x,v 1.40 2014/10/10 09:31:18 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>has_mouse</STRONG>, <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>
<STRONG>typedef</STRONG> <STRONG>struct</STRONG> <STRONG>{</STRONG>
<STRONG>short</STRONG> <STRONG>id;</STRONG> <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>bool</STRONG> <STRONG>has_mouse(void);</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 de-
fault, 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 which may be defined:
<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
---------------------------------------------------------------------
BUTTON5_PRESSED mouse button 5 down
BUTTON5_RELEASED mouse button 5 up
BUTTON5_CLICKED mouse button 5 clicked
BUTTON5_DOUBLE_CLICKED mouse button 5 double clicked
BUTTON5_TRIPLE_CLICKED mouse button 5 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 has been made visible in a
window, calling the <STRONG>wgetch</STRONG> function on that window may re-
turn <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 corresponding data in the queue is marked
invalid. A subsequent call to <STRONG>getmouse</STRONG> will retrieve the
next older item from the queue.
The <STRONG>ungetmouse</STRONG> function behaves analogously to <STRONG>ungetch</STRONG>.
It pushes a <STRONG>KEY_MOUSE</STRONG> event onto the input queue, and as-
sociates 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 coordinates
relative to the given window or vice versa. Please remem-
ber, that stdscr-relative coordinates are not always iden-
tical to window-relative coordinates due to the mechanism
to reserve lines on top or bottom of the screen for other
purposes (see the <STRONG>ripoffline()</STRONG> and <STRONG>slk_init</STRONG> calls, for ex-
ample). 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 window-relative co-
ordinates and returned through the pointers. If the con-
version was successful, the function returns <STRONG>TRUE</STRONG>. If one
of the parameters was NULL or the location is not inside
the window, <STRONG>FALSE</STRONG> is returned. If <STRONG>to_screen</STRONG> is <STRONG>FALSE</STRONG>, the
pointers <STRONG>pY,</STRONG> <STRONG>pX</STRONG> must reference window-relative coordi-
nates. 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 transforma-
tion was successful.
The <STRONG>mouse_trafo</STRONG> function performs the same translation as
<STRONG>wmouse_trafo</STRONG>, using stdscr for <STRONG>win</STRONG>.
The <STRONG>mouseinterval</STRONG> function sets the maximum time (in thou-
sands of a second) that can elapse between press and re-
lease events for them to be recognized as a click. Use
<STRONG>mouseinterval(0)</STRONG> to disable click resolution. This func-
tion returns the previous interval value. Use <STRONG>mouseinter-</STRONG>
<STRONG>val(-1)</STRONG> to obtain the interval without altering it. The
default is one sixth of a second.
The <STRONG>has_mouse</STRONG> function returns TRUE if the mouse driver
has been successfully initialized.
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> and <STRONG>ungetmouse</STRONG> return the integer <STRONG>ERR</STRONG> upon fail-
ure or <STRONG>OK</STRONG> upon successful completion.
<STRONG>getmouse</STRONG>
returns an error. If no mouse driver was ini-
tialized, or if the mask parameter is zero, it
also returns an error if no more events remain
in the queue.
<STRONG>ungetmouse</STRONG>
returns an error if the FIFO is full.
<STRONG>mousemask</STRONG> returns the mask of reportable events.
<STRONG>mouseinterval</STRONG> returns the previous interval value, unless
the terminal was not initialized. In that case, it re-
turns the maximum interval value (166).
<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. If the interface is changed, the value of
<STRONG>NCURSES_MOUSE_VERSION</STRONG> will be incremented. These values
for <STRONG>NCURSES_MOUSE_VERSION</STRONG> may be specified when configur-
ing ncurses:
1 has definitions for reserved events. The mask
uses 28 bits.
2 adds definitions for button 5, removes the defi-
nitions for reserved events. The mask uses 29
bits.
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 ei-
ther xterm's built-in mouse-tracking API or platform-spe-
cific 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>mouse-</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.
The <STRONG>ALL_MOUSE_EVENTS</STRONG> class does not include <STRONG>RE-</STRONG>
<STRONG>PORT_MOUSE_POSITION</STRONG>. They are distinct. For example, in
xterm, wheel/scrolling mice send position reports as a se-
quence of presses of buttons 4 or 5 without matching but-
ton-releases.
</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>mousemask</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 de-
scription should have <STRONG>kmous</STRONG> set to "\E[M" (the beginning
of the response from xterm for mouse clicks). Other val-
ues for <STRONG>kmous</STRONG> are permitted, but under the same assump-
tion, i.e., it is the beginning of the response.
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_kernel.3x.html">curs_kernel(3x)</A></STRONG>, <STRONG><A HREF="curs_slk.3x.html">curs_slk(3x)</A></STRONG>, <STRONG>curs_vari-</STRONG>
<STRONG><A HREF="curs_variables.3x.html">ables(3x)</A></STRONG>.
<STRONG><A HREF="curs_mouse.3x.html">curs_mouse(3x)</A></STRONG>
</PRE>
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