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31 * @Id: curs_mouse.3x,v 1.82 2023/12/16 21:08:16 tom Exp @
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43 <H1 class="no-header">curs_mouse 3x 2023-12-16 ncurses 6.4 Library calls</H1>
45 <STRONG><A HREF="curs_mouse.3x.html">curs_mouse(3x)</A></STRONG> Library calls <STRONG><A HREF="curs_mouse.3x.html">curs_mouse(3x)</A></STRONG>
50 </PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
51 <STRONG>has_mouse</STRONG>, <STRONG>getmouse</STRONG>, <STRONG>ungetmouse</STRONG>, <STRONG>mousemask</STRONG>, <STRONG>wenclose</STRONG>, <STRONG>mouse_trafo</STRONG>,
52 <STRONG>wmouse_trafo</STRONG>, <STRONG>mouseinterval</STRONG> - get mouse events in <EM>curses</EM>
55 </PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
56 <STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
58 <STRONG>typedef</STRONG> <STRONG>unsigned</STRONG> <STRONG>long</STRONG> <STRONG>mmask_t;</STRONG>
60 <STRONG>typedef</STRONG> <STRONG>struct</STRONG> <STRONG>{</STRONG>
61 <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>
62 <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>y,</STRONG> <STRONG>z;</STRONG> <EM>/*</EM> <EM>event</EM> <EM>coordinates</EM> <EM>*/</EM>
63 <STRONG>mmask_t</STRONG> <STRONG>bstate;</STRONG> <EM>/*</EM> <EM>button</EM> <EM>state</EM> <EM>bits</EM> <EM>*/</EM>
64 <STRONG>}</STRONG> <STRONG>MEVENT;</STRONG>
66 <STRONG>bool</STRONG> <STRONG>has_mouse(void);</STRONG>
68 <STRONG>int</STRONG> <STRONG>getmouse(MEVENT</STRONG> <STRONG>*</STRONG><EM>event</EM><STRONG>);</STRONG>
69 <STRONG>int</STRONG> <STRONG>ungetmouse(MEVENT</STRONG> <STRONG>*</STRONG><EM>event</EM><STRONG>);</STRONG>
71 <STRONG>mmask_t</STRONG> <STRONG>mousemask(mmask_t</STRONG> <EM>newmask</EM><STRONG>,</STRONG> <STRONG>mmask_t</STRONG> <STRONG>*</STRONG><EM>oldmask</EM><STRONG>);</STRONG>
73 <STRONG>bool</STRONG> <STRONG>wenclose(const</STRONG> <STRONG>WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>);</STRONG>
75 <STRONG>bool</STRONG> <STRONG>mouse_trafo(int*</STRONG> <EM>pY</EM><STRONG>,</STRONG> <STRONG>int*</STRONG> <EM>pX</EM><STRONG>,</STRONG> <STRONG>bool</STRONG> <EM>to</EM><STRONG>_</STRONG><EM>screen</EM><STRONG>);</STRONG>
76 <STRONG>bool</STRONG> <STRONG>wmouse_trafo(const</STRONG> <STRONG>WINDOW*</STRONG> <EM>win</EM><STRONG>,</STRONG>
77 <STRONG>int*</STRONG> <EM>pY</EM><STRONG>,</STRONG> <STRONG>int*</STRONG> <EM>pX</EM><STRONG>,</STRONG> <STRONG>bool</STRONG> <EM>to</EM><STRONG>_</STRONG><EM>screen</EM><STRONG>);</STRONG>
79 <STRONG>int</STRONG> <STRONG>mouseinterval(int</STRONG> <EM>erval</EM><STRONG>);</STRONG>
82 </PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
83 These functions provide an interface to mouse events from <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>.
84 Mouse events are represented by <STRONG>KEY_MOUSE</STRONG> pseudo-key values in the
85 <STRONG><A HREF="curs_getch.3x.html">wgetch(3x)</A></STRONG> input stream.
88 </PRE><H3><a name="h3-mousemask">mousemask</a></H3><PRE>
89 To make mouse events visible, use the <STRONG>mousemask</STRONG> function. This sets
90 the mouse events to be reported. By default, no mouse events are
93 <STRONG>o</STRONG> The function returns an updated copy of <EM>newmask</EM> to indicate which
94 of the specified mouse events can be reported.
96 If the screen has not been initialized, or if the terminal does not
97 support mouse-events, this function returns 0.
99 <STRONG>o</STRONG> If <EM>oldmask</EM> is non-<STRONG>NULL</STRONG>, this function fills the indicated location
100 with the previous value of the current screen's mouse event mask.
102 As a side effect, setting a zero mousemask may turn off the mouse
103 pointer; setting a nonzero mask may turn it on. Whether this happens
107 </PRE><H3><a name="h3-Mouse-events">Mouse events</a></H3><PRE>
108 Here are the mouse event type masks which may be defined:
110 <STRONG>Name</STRONG> <STRONG>Description</STRONG>
111 ---------------------------------------------------------------------
112 <STRONG>BUTTON1_PRESSED</STRONG> mouse button 1 down
113 <STRONG>BUTTON1_RELEASED</STRONG> mouse button 1 up
114 <STRONG>BUTTON1_CLICKED</STRONG> mouse button 1 clicked
116 <STRONG>BUTTON1_DOUBLE_CLICKED</STRONG> mouse button 1 double clicked
117 <STRONG>BUTTON1_TRIPLE_CLICKED</STRONG> mouse button 1 triple clicked
118 ---------------------------------------------------------------------
119 <STRONG>BUTTON2_PRESSED</STRONG> mouse button 2 down
120 <STRONG>BUTTON2_RELEASED</STRONG> mouse button 2 up
121 <STRONG>BUTTON2_CLICKED</STRONG> mouse button 2 clicked
122 <STRONG>BUTTON2_DOUBLE_CLICKED</STRONG> mouse button 2 double clicked
123 <STRONG>BUTTON2_TRIPLE_CLICKED</STRONG> mouse button 2 triple clicked
124 ---------------------------------------------------------------------
125 <STRONG>BUTTON3_PRESSED</STRONG> mouse button 3 down
126 <STRONG>BUTTON3_RELEASED</STRONG> mouse button 3 up
127 <STRONG>BUTTON3_CLICKED</STRONG> mouse button 3 clicked
128 <STRONG>BUTTON3_DOUBLE_CLICKED</STRONG> mouse button 3 double clicked
129 <STRONG>BUTTON3_TRIPLE_CLICKED</STRONG> mouse button 3 triple clicked
130 ---------------------------------------------------------------------
131 <STRONG>BUTTON4_PRESSED</STRONG> mouse button 4 down
132 <STRONG>BUTTON4_RELEASED</STRONG> mouse button 4 up
133 <STRONG>BUTTON4_CLICKED</STRONG> mouse button 4 clicked
134 <STRONG>BUTTON4_DOUBLE_CLICKED</STRONG> mouse button 4 double clicked
135 <STRONG>BUTTON4_TRIPLE_CLICKED</STRONG> mouse button 4 triple clicked
136 ---------------------------------------------------------------------
137 <STRONG>BUTTON5_PRESSED</STRONG> mouse button 5 down
138 <STRONG>BUTTON5_RELEASED</STRONG> mouse button 5 up
139 <STRONG>BUTTON5_CLICKED</STRONG> mouse button 5 clicked
140 <STRONG>BUTTON5_DOUBLE_CLICKED</STRONG> mouse button 5 double clicked
141 <STRONG>BUTTON5_TRIPLE_CLICKED</STRONG> mouse button 5 triple clicked
142 ---------------------------------------------------------------------
143 <STRONG>BUTTON_SHIFT</STRONG> shift was down during button state change
144 <STRONG>BUTTON_CTRL</STRONG> control was down during button state change
145 <STRONG>BUTTON_ALT</STRONG> alt was down during button state change
146 <STRONG>ALL_MOUSE_EVENTS</STRONG> report all button state changes
147 <STRONG>REPORT_MOUSE_POSITION</STRONG> report mouse movement
148 ---------------------------------------------------------------------
151 </PRE><H3><a name="h3-getmouse">getmouse</a></H3><PRE>
152 Once a class of mouse events has been made visible in a window, calling
153 the <STRONG>wgetch</STRONG> function on that window may return <STRONG>KEY_MOUSE</STRONG> as an indicator
154 that a mouse event has been queued. To read the event data and pop the
155 event off the queue, call <STRONG>getmouse</STRONG>. This function will return <STRONG>OK</STRONG> if a
156 mouse event is actually visible in the given window, <STRONG>ERR</STRONG> otherwise.
157 When <STRONG>getmouse</STRONG> returns <STRONG>OK</STRONG>, the data deposited as y and x in the event
158 structure coordinates will be screen-relative character-cell
159 coordinates. The returned state mask will have exactly one bit set to
160 indicate the event type. The corresponding data in the queue is marked
161 invalid. A subsequent call to <STRONG>getmouse</STRONG> will retrieve the next older
165 </PRE><H3><a name="h3-ungetmouse">ungetmouse</a></H3><PRE>
166 The <STRONG>ungetmouse</STRONG> function behaves analogously to <STRONG>ungetch</STRONG>. It pushes a
167 <STRONG>KEY_MOUSE</STRONG> event onto the input queue, and associates with that event
168 the given state data and screen-relative character-cell coordinates.
171 </PRE><H3><a name="h3-wenclose">wenclose</a></H3><PRE>
172 The <STRONG>wenclose</STRONG> function tests whether a given pair of screen-relative
173 character-cell coordinates is enclosed by a given window, returning
174 <STRONG>TRUE</STRONG> if it is and <STRONG>FALSE</STRONG> otherwise. It is useful for determining what
175 subset of the screen windows enclose the location of a mouse event.
178 </PRE><H3><a name="h3-wmouse_trafo">wmouse_trafo</a></H3><PRE>
179 The <STRONG>wmouse_trafo</STRONG> function transforms a given pair of coordinates from
180 <STRONG>stdscr</STRONG>-relative coordinates to coordinates relative to the given window
181 or vice versa. The resulting <STRONG>stdscr</STRONG>-relative coordinates are not
182 always identical to window-relative coordinates due to the mechanism to
183 reserve lines on top or bottom of the screen for other purposes (see
184 the <STRONG>ripoffline</STRONG> and <STRONG><A HREF="curs_slk.3x.html">slk_init(3x)</A></STRONG> calls, for example).
186 <STRONG>o</STRONG> If the parameter <EM>to</EM><STRONG>_</STRONG><EM>screen</EM> is <STRONG>TRUE</STRONG>, the pointers <EM>pY,</EM> <EM>pX</EM> must
187 reference the coordinates of a location inside the window <EM>win</EM>.
188 They are converted to window-relative coordinates and returned
189 through the pointers. If the conversion was successful, the
190 function returns <STRONG>TRUE</STRONG>.
192 <STRONG>o</STRONG> If one of the parameters was <STRONG>NULL</STRONG> or the location is not inside the
193 window, <STRONG>FALSE</STRONG> is returned.
195 <STRONG>o</STRONG> If <EM>to</EM><STRONG>_</STRONG><EM>screen</EM> is <STRONG>FALSE</STRONG>, the pointers <EM>pY,</EM> <EM>pX</EM> must reference window-
196 relative coordinates. They are converted to <STRONG>stdscr</STRONG>-relative
197 coordinates if the window <EM>win</EM> encloses this point. In this case
198 the function returns <STRONG>TRUE</STRONG>.
200 <STRONG>o</STRONG> If one of the parameters is <STRONG>NULL</STRONG> or the point is not inside the
201 window, <STRONG>FALSE</STRONG> is returned. The referenced coordinates are only
202 replaced by the converted coordinates if the transformation was
206 </PRE><H3><a name="h3-mouse_trafo">mouse_trafo</a></H3><PRE>
207 The <STRONG>mouse_trafo</STRONG> function performs the same translation as <STRONG>wmouse_trafo</STRONG>,
208 using <STRONG>stdscr</STRONG> for <EM>win</EM>.
211 </PRE><H3><a name="h3-mouseinterval">mouseinterval</a></H3><PRE>
212 The <STRONG>mouseinterval</STRONG> function sets the maximum time (in thousands of a
213 second) that can elapse between press and release events for them to be
214 recognized as a click. Use <STRONG>mouseinterval(0)</STRONG> to disable click
215 resolution. This function returns the previous interval value. Use
216 <STRONG>mouseinterval(-1)</STRONG> to obtain the interval without altering it. The
217 default is one sixth of a second.
220 </PRE><H3><a name="h3-has_mouse">has_mouse</a></H3><PRE>
221 The <STRONG>has_mouse</STRONG> function returns <STRONG>TRUE</STRONG> if the mouse driver has been
222 successfully initialized, and <STRONG>FALSE</STRONG> otherwise.
224 Note that mouse events will be ignored when input is in cooked mode,
225 and will cause an error beep when cooked mode is being simulated in a
226 window by a function such as <STRONG>getstr</STRONG> that expects a linefeed for input-
230 </PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
231 <STRONG>has_mouse</STRONG>, <STRONG>wenclose</STRONG>, <STRONG>mouse_trafo</STRONG>, and <STRONG>wmouse_trafo</STRONG> return <STRONG>TRUE</STRONG> or <STRONG>FALSE</STRONG>
234 <STRONG>getmouse</STRONG> and <STRONG>ungetmouse</STRONG> return <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> upon success.
236 <STRONG>getmouse</STRONG> fails if:
238 <STRONG>o</STRONG> no mouse driver was initialized,
240 <STRONG>o</STRONG> the mask of reportable events is zero,
242 <STRONG>o</STRONG> a mouse event was detected that does not match the mask,
244 <STRONG>o</STRONG> or if no more events remain in the queue.
246 <STRONG>ungetmouse</STRONG> returns an error if the event queue is full.
248 <STRONG>mousemask</STRONG> returns the mask of reportable events.
250 <STRONG>mouseinterval</STRONG> returns the previous interval value, unless the terminal
251 was not initialized. In that case, it returns the maximum interval
255 </PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
256 The feature macro <STRONG>NCURSES_MOUSE_VERSION</STRONG> is provided so the preprocessor
257 can be used to test whether these features are present. If the
258 interface is changed, the value of <STRONG>NCURSES_MOUSE_VERSION</STRONG> will be
259 incremented. These values for <STRONG>NCURSES_MOUSE_VERSION</STRONG> may be specified
260 when configuring <EM>ncurses</EM>:
262 1 has definitions for reserved events. The mask uses 28 bits.
264 2 adds definitions for button 5, removes the definitions for
265 reserved events. The mask uses 29 bits.
267 The order of the <STRONG>MEVENT</STRONG> structure members is not guaranteed.
268 Additional fields may be added to the structure in the future.
270 Under <EM>ncurses</EM>, these calls are implemented using either xterm's built-
271 in mouse-tracking API or platform-specific drivers including
273 <STRONG>o</STRONG> Alessandro Rubini's gpm server
275 <STRONG>o</STRONG> FreeBSD sysmouse
277 <STRONG>o</STRONG> OS/2 EMX
279 If you are using an unsupported configuration, mouse events will not be
280 visible to <EM>ncurses</EM> (and the <STRONG>mousemask</STRONG> function will always return <STRONG>0</STRONG>).
282 If the terminfo entry contains a <STRONG>XM</STRONG> string, this is used in the xterm
283 mouse driver to control the way the terminal is initialized for mouse
284 operation. The default, if <STRONG>XM</STRONG> is not found, corresponds to private
287 \E[?1000%?%p1%{1}%=%th%el%;
289 The mouse driver also recognizes a newer xterm private mode 1006, e.g.,
291 \E[?1006;1000%?%p1%{1}%=%th%el%;
293 The <EM>z</EM> member in the event structure is not presently used. It is
294 intended for use with touch screens (which may be pressure-sensitive)
295 or with 3D-mice/trackballs/power gloves.
297 The <STRONG>ALL_MOUSE_EVENTS</STRONG> class does not include <STRONG>REPORT_MOUSE_POSITION</STRONG>.
298 They are distinct. For example, in xterm, wheel/scrolling mice send
299 position reports as a sequence of presses of buttons 4 or 5 without
300 matching button-releases.
303 </PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
304 These calls were designed for <EM>ncurses</EM>, and are not found in SVr4
305 <EM>curses</EM>, 4.4BSD <EM>curses</EM>, or any other previous version of <EM>curses</EM>.
307 SVr4 <EM>curses</EM> had support for the mouse in a variant of <STRONG>xterm(1)</STRONG>. It is
308 mentioned in a few places, but with no supporting documentation:
310 <STRONG>o</STRONG> the "libcurses" manual page lists functions for this feature which
311 are prototyped in <STRONG>curses.h</STRONG>:
313 extern int mouse_set(long int);
314 extern int mouse_on(long int);
315 extern int mouse_off(long int);
316 extern int request_mouse_pos(void);
317 extern int map_button(unsigned long);
318 extern void wmouse_position(WINDOW *, int *, int *);
319 extern unsigned long getmouse(void), getbmap(void);
321 <STRONG>o</STRONG> the "terminfo" manual page lists capabilities for the feature
323 buttons btns BT Number of buttons on the mouse
324 get_mouse getm Gm Curses should get button events
325 key_mouse kmous Km 0631, Mouse event has occurred
326 mouse_info minfo Mi Mouse status information
327 req_mouse_pos reqmp RQ Request mouse position report
329 <STRONG>o</STRONG> the interface made assumptions (as does <EM>ncurses</EM>) about the escape
330 sequences sent to and received from the terminal.
332 For instance the SVr4 <EM>curses</EM> library used the <STRONG>get_mouse</STRONG> capability
333 to tell the terminal which mouse button events it should send,
334 passing the mouse-button bit mask to the terminal. Also, it could
335 ask the terminal where the mouse was using the <STRONG>req_mouse_pos</STRONG>
338 Those features required a terminal which had been modified to work
339 with <EM>curses</EM>. They were not part of the X Consortium's xterm.
341 When developing the xterm mouse support for <EM>ncurses</EM> in September 1995,
342 Eric Raymond was uninterested in using the same interface due to its
343 lack of documentation. Later, in 1998, Mark Hesseling provided support
344 in PDCurses 2.3 using the SVr4 interface. PDCurses, however, does not
345 use video terminals, making it unnecessary to be concerned about
346 compatibility with the escape sequences.
349 </PRE><H2><a name="h2-BUGS">BUGS</a></H2><PRE>
350 Mouse events from <EM>xterm</EM> are <EM>not</EM> ignored in cooked mode if they have
351 been enabled by <STRONG>mousemask</STRONG>. Instead, the <EM>xterm</EM> mouse report sequence
352 appears in the string read.
354 Mouse event reports from <EM>xterm</EM> are not detected correctly in a window
355 with keypad application mode disabled, since they are interpreted as a
356 variety of function key. Set the the terminal's <EM>terminfo</EM> capability
357 <STRONG>kmous</STRONG> to "\E[M" (the beginning of the response from <EM>xterm</EM> for mouse
358 clicks). Other values of <STRONG>kmous</STRONG> are permitted under the same
359 assumption, that is, the report begins with that sequence.
361 Because there are no standard response sequences that serve to identify
362 terminals supporting the <EM>xterm</EM> mouse protocol, <EM>ncurses</EM> assumes that if
363 <STRONG>kmous</STRONG> is defined in the terminal description, or if the terminal type's
364 primary name or aliases contain the string "xterm", then the terminal
365 may send mouse events. The <STRONG>kmous</STRONG> capability is checked first, allowing
366 use of newer <EM>xterm</EM> mouse protocols such as its private mode 1006.
369 </PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
370 <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_inopts.3x.html">curs_inopts(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>,
371 <STRONG><A HREF="curs_variables.3x.html">curs_variables(3x)</A></STRONG>
375 ncurses 6.4 2023-12-16 <STRONG><A HREF="curs_mouse.3x.html">curs_mouse(3x)</A></STRONG>
379 <li><a href="#h2-NAME">NAME</a></li>
380 <li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
381 <li><a href="#h2-DESCRIPTION">DESCRIPTION</a>
383 <li><a href="#h3-mousemask">mousemask</a></li>
384 <li><a href="#h3-Mouse-events">Mouse events</a></li>
385 <li><a href="#h3-getmouse">getmouse</a></li>
386 <li><a href="#h3-ungetmouse">ungetmouse</a></li>
387 <li><a href="#h3-wenclose">wenclose</a></li>
388 <li><a href="#h3-wmouse_trafo">wmouse_trafo</a></li>
389 <li><a href="#h3-mouse_trafo">mouse_trafo</a></li>
390 <li><a href="#h3-mouseinterval">mouseinterval</a></li>
391 <li><a href="#h3-has_mouse">has_mouse</a></li>
394 <li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
395 <li><a href="#h2-NOTES">NOTES</a></li>
396 <li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
397 <li><a href="#h2-BUGS">BUGS</a></li>
398 <li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>