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curs_mouse(3X)							curs_mouse(3X)

       has_mouse, getmouse, ungetmouse,	mousemask, wenclose, mouse_trafo,
       wmouse_trafo, mouseinterval - mouse interface through curses

       #include	<curses.h>

       typedef unsigned	long mmask_t;

       typedef struct {
	   short id;	     /*	ID to distinguish multiple devices */
	   int x, y, z;	     /*	event coordinates */
	   mmask_t bstate;   /*	button state bits */
       } MEVENT;

       bool has_mouse(void);
       int getmouse(MEVENT *event);
       int ungetmouse(MEVENT *event);
       mmask_t mousemask(mmask_t newmask, mmask_t *oldmask);
       bool wenclose(const WINDOW *win,	int y, int x);
       bool mouse_trafo(int* pY, int* pX, bool to_screen);
       bool wmouse_trafo(const WINDOW* win, int* pY, int* pX,
	    bool to_screen);
       int mouseinterval(int erval);

       These functions provide an interface to mouse events from  ncurses(3X).
       Mouse  events  are  represented	by  KEY_MOUSE pseudo-key values	in the
       wgetch input stream.

       To make mouse events visible, use the mousemask	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 which may be	defined:

       Name			Description
       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 have been made visible in a window, call-
       ing the wgetch function on that window may return KEY_MOUSE as an indi-
       cator  that  a mouse event has been queued.  To read the	event data and
       pop the event off the queue, call getmouse.  This function will	return
       OK if a mouse event is actually visible in the given window, ERR	other-
       wise.  When getmouse returns OK,	the data deposited as y	and x  in  the
       event  structure	coordinates will be screen-relative character-cell co-
       ordinates.  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 getmouse will retrieve  the  next	 older
       item from the queue.

       The  ungetmouse	function  behaves analogously to ungetch.  It pushes a
       KEY_MOUSE event onto the	input queue, and associates  with  that	 event
       the given state data and	screen-relative	character-cell coordinates.

       The  wenclose  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 otherwise.  It	is useful for determining what
       subset of the screen windows enclose the	location of a mouse event.

       The wmouse_trafo	function transforms a given pair of  coordinates  from
       stdscr-relative coordinates to coordinates relative to the given	window
       or vice versa.  Please remember,	that stdscr-relative  coordinates  are
       not  always  identical to window-relative coordinates due to the	mecha-
       nism to reserve lines on	top or bottom of the screen for	other purposes
       (see the	ripoffline() and slk_init calls, for example).	If the parame-
       ter to_screen is	TRUE, the pointers pY, pX must reference  the  coordi-
       nates  of a location inside the window win.  They are converted to win-
       dow-relative coordinates	and returned through  the  pointers.   If  the
       conversion  was	successful,  the function returns TRUE.	 If one	of the
       parameters was NULL or the location is not inside the window, FALSE  is
       returned.   If  to_screen  is FALSE, the	pointers pY, pX	must reference
       window-relative coordinates.  They are converted	to stdscr-relative co-
       ordinates  if  the  window  win	encloses this point.  In this case the
       function	returns	TRUE.  If one of the parameters	is NULL	or  the	 point
       is  not	inside the window, FALSE is returned.  Please notice, that the
       referenced coordinates are only replaced	by the	converted  coordinates
       if the transformation was successful.

       The mouse_trafo function	performs the same translation as wmouse_trafo,
       using stdscr for	win.

       The mouseinterval function sets the maximum time	 (in  thousands	 of  a
       second) that can	elapse between press and release events	for them to be
       recognized as a click.  Use mouseinterval(0) to disable	click  resolu-
       tion.  This function returns the	previous interval value.  Use mousein-
       terval(-1) to obtain the	interval without altering it.  The default  is
       one sixth of a second.

       The  has_mouse  function	returns	TRUE if	the mouse driver has been suc-
       cessfully 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 getstr that	expects	a linefeed for	input-
       loop termination.

       getmouse	 and ungetmouse	return the integer ERR upon failure or OK upon
       successful completion.

		   returns an error.  If no mouse driver was  initialized,  or
		   if  the mask	parameter is zero, it also returns an error if
		   no more events remain in the	queue.

		   returns an error if the FIFO	is full.

       mousemask returns the mask of reportable	events.

       mouseinterval returns the previous interval value, unless the  terminal
       was  not	 initialized.	In  that case, it returns the maximum interval
       value (166).

       wenclose	and wmouse_trafo are boolean functions returning TRUE or FALSE
       depending on their test result.

       These  calls  were  designed for	ncurses(3X), and are not found in SVr4
       curses, 4.4BSD curses, or any other previous version of curses.

       The feature macro NCURSES_MOUSE_VERSION is provided so the preprocessor
       can  be used to test whether these features are present.	 If the	inter-
       face is changed,	the value of NCURSES_MOUSE_VERSION will	be  increment-
       ed.   These values for NCURSES_MOUSE_VERSION may	be specified when con-
       figuring	ncurses:

	      1	 has definitions for reserved events.  The mask	uses 28	 bits.

	      2	 adds  definitions  for	 button	5, removes the definitions for
		 reserved events.  The mask uses 29 bits.

       The order of the	MEVENT structure members is not	guaranteed.  Addition-
       al fields may be	added to the structure in the future.

       Under  ncurses(3X),  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  ncurses(3X)	(and the mousemask function will always	return

       If the terminfo entry contains a	XM string, this	is used	in  the	 xterm
       mouse  driver  to control the way the terminal is initialized for mouse
       operation.  The default,	if XM is not  found,  corresponds  to  private
       mode 1000 of xterm:
       The  z  member in the event structure is	not presently used.  It	is in-
       tended for use with touch screens (which	may be pressure-sensitive)  or
       with 3D-mice/trackballs/power gloves.

       Mouse  events  under  xterm  will  not in fact be ignored during	cooked
       mode, if	they have been enabled by mousemask.  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 interpreted  as	a  variety  of
       function	 key.	Your  terminfo	description  should  have kmous	set to
       "\E[M" (the beginning of	the response from  xterm  for  mouse  clicks).
       Other  values  for  kmous are permitted,	but under the same assumption,
       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, ncurses as-
       sumes that if your $TERM	 environment  variable	contains  "xterm",  or
       kmous  is  defined  in  the terminal description, then the terminal may
       send mouse events.

       curses(3X), curs_kernel(3X), curs_slk(3X), curs_variables(3X).



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