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31 * @Id: curs_mouse.3x,v 1.20 2002/07/20 14:52:14 tom Exp @
35 <TITLE>curs_mouse 3x</TITLE>
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40 <H1>curs_mouse 3x</H1>
43 <!-- Manpage converted by man2html 3.0.1 -->
47 <STRONG>getmouse</STRONG>, <STRONG>ungetmouse</STRONG>, <STRONG>mousemask</STRONG>, <STRONG>wenclose</STRONG>, <STRONG>mouse_trafo</STRONG>,
48 <STRONG>wmouse_trafo</STRONG>, <STRONG>mouseinterval</STRONG> - mouse interface through
53 <H2>SYNOPSIS</H2><PRE>
54 <STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
56 <STRONG>typedef</STRONG> <STRONG>unsigned</STRONG> <STRONG>long</STRONG> <STRONG>mmask_t;</STRONG>
58 <STRONG>typedef</STRONG> <STRONG>struct</STRONG>
60 <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>
61 <STRONG>int</STRONG> <STRONG>x,</STRONG> <STRONG>y,</STRONG> <STRONG>z;</STRONG> <EM>/*</EM> <EM>event</EM> <EM>coordinates</EM> <EM>*/</EM>
62 <STRONG>mmask_t</STRONG> <STRONG>bstate;</STRONG> <EM>/*</EM> <EM>button</EM> <EM>state</EM> <EM>bits</EM> <EM>*/</EM>
64 <STRONG>MEVENT;</STRONG>
65 <STRONG>int</STRONG> <STRONG>getmouse(MEVENT</STRONG> <STRONG>*event);</STRONG>
66 <STRONG>int</STRONG> <STRONG>ungetmouse(MEVENT</STRONG> <STRONG>*event);</STRONG>
67 <STRONG>mmask_t</STRONG> <STRONG>mousemask(mmask_t</STRONG> <STRONG>newmask,</STRONG> <STRONG>mmask_t</STRONG> <STRONG>*oldmask);</STRONG>
68 <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>
69 <STRONG>bool</STRONG> <STRONG>mouse_trafo(int*</STRONG> <STRONG>pY,</STRONG> <STRONG>int*</STRONG> <STRONG>pX,</STRONG> <STRONG>bool</STRONG> <STRONG>to_screen);</STRONG>
70 <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>
71 <STRONG>bool</STRONG> <STRONG>to_screen);</STRONG>
72 <STRONG>int</STRONG> <STRONG>mouseinterval(int</STRONG> <STRONG>erval);</STRONG>
76 <H2>DESCRIPTION</H2><PRE>
77 These functions provide an interface to mouse events from
78 <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>. Mouse events are represented by <STRONG>KEY_MOUSE</STRONG>
79 pseudo-key values in the <STRONG>wgetch</STRONG> input stream.
81 To make mouse events visible, use the <STRONG>mousemask</STRONG> function.
82 This will set the mouse events to be reported. By
83 default, no mouse events are reported. The function will
84 return a mask to indicate which of the specified mouse
85 events can be reported; on complete failure it returns 0.
86 If oldmask is non-NULL, this function fills the indicated
87 location with the previous value of the given window's
90 As a side effect, setting a zero mousemask may turn off
91 the mouse pointer; setting a nonzero mask may turn it on.
92 Whether this happens is device-dependent.
94 Here are the mouse event type masks:
96 <EM>Name</EM> <EM>Description</EM>
97 ---------------------------------------------------------------------
98 BUTTON1_PRESSED mouse button 1 down
99 BUTTON1_RELEASED mouse button 1 up
100 BUTTON1_CLICKED mouse button 1 clicked
101 BUTTON1_DOUBLE_CLICKED mouse button 1 double clicked
102 BUTTON1_TRIPLE_CLICKED mouse button 1 triple clicked
104 BUTTON2_PRESSED mouse button 2 down
105 BUTTON2_RELEASED mouse button 2 up
106 BUTTON2_CLICKED mouse button 2 clicked
107 BUTTON2_DOUBLE_CLICKED mouse button 2 double clicked
108 BUTTON2_TRIPLE_CLICKED mouse button 2 triple clicked
109 BUTTON3_PRESSED mouse button 3 down
110 BUTTON3_RELEASED mouse button 3 up
111 BUTTON3_CLICKED mouse button 3 clicked
112 BUTTON3_DOUBLE_CLICKED mouse button 3 double clicked
113 BUTTON3_TRIPLE_CLICKED mouse button 3 triple clicked
114 BUTTON4_PRESSED mouse button 4 down
115 BUTTON4_RELEASED mouse button 4 up
116 BUTTON4_CLICKED mouse button 4 clicked
117 BUTTON4_DOUBLE_CLICKED mouse button 4 double clicked
118 BUTTON4_TRIPLE_CLICKED mouse button 4 triple clicked
119 BUTTON_SHIFT shift was down during button state change
120 BUTTON_CTRL control was down during button state change
121 BUTTON_ALT alt was down during button state change
122 ALL_MOUSE_EVENTS report all button state changes
123 REPORT_MOUSE_POSITION report mouse movement
125 Once a class of mouse events have been made visible in a
126 window, calling the <STRONG>wgetch</STRONG> function on that window may
127 return <STRONG>KEY_MOUSE</STRONG> as an indicator that a mouse event has
128 been queued. To read the event data and pop the event off
129 the queue, call <STRONG>getmouse</STRONG>. This function will return <STRONG>OK</STRONG> if
130 a mouse event is actually visible in the given window, <STRONG>ERR</STRONG>
131 otherwise. When <STRONG>getmouse</STRONG> returns <STRONG>OK</STRONG>, the data deposited
132 as y and x in the event structure coordinates will be
133 screen-relative character-cell coordinates. The returned
134 state mask will have exactly one bit set to indicate the
137 The <STRONG>ungetmouse</STRONG> function behaves analogously to <STRONG>ungetch</STRONG>.
138 It pushes a <STRONG>KEY_MOUSE</STRONG> event onto the input queue, and
139 associates with that event the given state data and
140 screen-relative character-cell coordinates.
142 The <STRONG>wenclose</STRONG> function tests whether a given pair of
143 screen-relative character-cell coordinates is enclosed by
144 a given window, returning TRUE if it is and FALSE other-
145 wise. It is useful for determining what subset of the
146 screen windows enclose the location of a mouse event.
148 The <STRONG>wmouse_trafo</STRONG> function transforms a given pair of coor-
149 dinates from stdscr-relative coordinates to screen-rela-
150 tive coordinates or vice versa. Please remember, that
151 stdscr-relative coordinates are not always identical to
152 screen-relative coordinates due to the mechanism to
153 reserve lines on top or bottom of the screen for other
154 purposes (ripoff() call, see also slk_... functions). If
155 the parameter <STRONG>to_screen</STRONG> is <STRONG>TRUE</STRONG>, the pointers <STRONG>pY,</STRONG> <STRONG>pX</STRONG> must
156 reference the coordinates of a location inside the window
157 <STRONG>win</STRONG>. They are converted to screen-relative coordinates
158 and returned through the pointers. If the conversion was
159 successful, the function returns <STRONG>TRUE</STRONG>. If one of the
160 parameters was NULL or the location is not inside the win-
161 dow, <STRONG>FALSE</STRONG> is returned. If <STRONG>to_screen</STRONG> is <STRONG>FALSE</STRONG>, the point-
162 ers <STRONG>pY,</STRONG> <STRONG>pX</STRONG> must reference screen-relative coordinates.
163 They are converted to stdscr-relative coordinates if the
164 window <STRONG>win</STRONG> encloses this point. In this case the function
165 returns <STRONG>TRUE</STRONG>. If one of the parameters is NULL or the
166 point is not inside the window, <STRONG>FALSE</STRONG> is returned. Please
167 notice, that the referenced coordinates are only replaced
168 by the converted coordinates if the transformation was
171 The <STRONG>mouseinterval</STRONG> function sets the maximum time (in thou-
172 sands of a second) that can elapse between press and
173 release events for them to be recognized as a click. Use
174 <STRONG>mouseinterval(-1)</STRONG> to disable click resolution. This func-
175 tion returns the previous interval value. The default is
176 one sixth of a second.
178 Note that mouse events will be ignored when input is in
179 cooked mode, and will cause an error beep when cooked mode
180 is being simulated in a window by a function such as <STRONG>get-</STRONG>
181 <STRONG>str</STRONG> that expects a linefeed for input-loop termination.
186 <H2>RETURN VALUE</H2><PRE>
187 <STRONG>getmouse</STRONG>, <STRONG>ungetmouse</STRONG> and <STRONG>mouseinterval</STRONG> return the integer
188 <STRONG>ERR</STRONG> upon failure or <STRONG>OK</STRONG> upon successful completion. <STRONG>mouse-</STRONG>
189 <STRONG>mask</STRONG> returns the mask of reportable events. <STRONG>wenclose</STRONG> and
190 <STRONG>wmouse_trafo</STRONG> are boolean functions returning <STRONG>TRUE</STRONG> or <STRONG>FALSE</STRONG>
191 depending on their test result.
195 <H2>PORTABILITY</H2><PRE>
196 These calls were designed for <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>, and are not
197 found in SVr4 curses, 4.4BSD curses, or any other previous
200 The feature macro <STRONG>NCURSES_MOUSE_VERSION</STRONG> is provided so the
201 preprocessor can be used to test whether these features
202 are present (its value is 1). If the interface is
203 changed, the value of <STRONG>NCURSES_MOUSE_VERSION</STRONG> will be incre-
206 The order of the <STRONG>MEVENT</STRONG> structure members is not guaran-
207 teed. Additional fields may be added to the structure in
210 Under <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>, these calls are implemented using
211 either xterm's built-in mouse-tracking API or Alessandro
212 Rubini's gpm server. If you are using something other
213 than xterm and there is no gpm daemon running on your
214 machine, mouse events will not be visible to <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG>
215 (and the <STRONG>wmousemask</STRONG> function will always return <STRONG>0</STRONG>).
216 The z member in the event structure is not presently used.
217 It is intended for use with touch screens (which may be
218 pressure-sensitive) or with 3D-mice/trackballs/power
224 Mouse events under xterm will not in fact be ignored dur-
225 ing cooked mode, if they have been enabled by <STRONG>wmousemask</STRONG>.
226 Instead, the xterm mouse report sequence will appear in
229 Mouse events under xterm will not be detected correctly in
230 a window with its keypad bit off, since they are inter-
231 preted as a variety of function key. Your terminfo
232 description must have <STRONG>kmous</STRONG> set to "\E[M" (the beginning
233 of the response from xterm for mouse clicks).
235 Because there are no standard terminal responses that
236 would serve to identify terminals which support the xterm
237 mouse protocol, <STRONG>ncurses</STRONG> assumes that if your $TERM envi-
238 ronment variable contains "xterm", or <STRONG>kmous</STRONG> is defined in
239 the terminal description, then the terminal may send mouse
244 <H2>SEE ALSO</H2><PRE>
245 <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>.
277 Man(1) output converted with
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