'\" t .\" $OpenBSD: curs_mouse.3tbl,v 1.4 1997/12/14 23:15:40 millert Exp $ .\" Id: curs_mouse.3x,v 0.7 1997/12/13 22:36:24 tom Exp $ .TH curs_mouse 3 "" .SH NAME \fBgetmouse\fR, \fBungetmouse\fR, \fBmousemask\fR - mouse interface through curses .SH SYNOPSIS .nf \fB#include \fR \fBtypedef unsigned long mmask_t; typedef struct { short id; \fI/* ID to distinguish multiple devices */\fB int x, y, z; \fI/* event coordinates */\fB mmask_t bstate; \fI/* button state bits */\fB } MEVENT;\fR .fi .br \fBint getmouse(MEVENT *event);\fR .br \fBint ungetmouse(MEVENT *event);\fR .br \fBmmask_t mousemask(mmask_t newmask, mmask_t *oldmask);\fR .br \fBbool wenclose(WINDOW *win, int y, int x)\fR .br \fBint mouseinterval(int erval)\fR .br .SH DESCRIPTION These functions provide an interface to mouse events from \fBcurses\fR(3). Mouse events are represented by \fBKEY_MOUSE\fR pseudo-key values in the \fBwgetch\fR input stream. To make mouse events visible, use the \fBmousemask\fR 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: .TS l l _ _ l l. \fIName\fR \fIDescription\fR 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 .TE Once a class of mouse events have been made visible in a window, calling the \fBwgetch\fR function on that window may return \fBKEY_MOUSE\fR as an indicator that a mouse event has been queued. To read the event data and pop the event off the queue, call \fBgetmouse\fR. This function will return \fBOK\fR if a mouse event is actually visible in the given window, \fBERR\fR otherwise. When \fBgetmouse\fR returns \fBOK\fR, 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 \fBungetmouse\fR function behaves analogously to \fBungetch\fR. It pushes a \fBKEY_MOUSE\fR event onto the input queue, and associates with that event the given state data and screen-relative character-cell coordinates. The \fBwenclose\fR 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 \fBmouseinterval\fR function sets the maximum time (in thousands of a second) that can elapse between press and release events in order for them to be recognized as a click. This function returns the previous interval value. The default is one fifth 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 \fBgetstr\fR that expects a linefeed for input-loop termination. .SH RETURN VALUE All routines return the integer \fBERR\fR upon failure or \fBOK\fR upon successful completion. .SH PORTABILITY These calls were designed for \fBcurses\fR(3), and are not found in SVr4 curses, 4.4BSD curses, or any other previous version of curses. The feature macro \fBNCURSES_MOUSE_VERSION\fR is provided so the preprocessor can be used to test whether these features are present (its value is 1). NOTE: THIS INTERFACE IS EXPERIMENTAL AND IS SUBJECT TO CHANGE WITHOUT NOTICE! If the interface is changed, the value of \fBNCURSES_MOUSE_VERSION\fR will be incremented. The order of the \fBMEVENT\fR structure members is not guaranteed. Additional fields may be added to the structure in the future. Under \fBcurses\fR(3), these calls are implemented using either xterm's built-in mouse-tracking API or Alessandro Rubini's gpm server. If you are using something other than xterm there is no gpm daemon running on your machine, mouse events will not be visible to \fBcurses\fR(3) (and the \fBwmousemask\fR function will always return \fB0\fR). 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. .SH BUGS Mouse events under xterm will not in fact be ignored during cooked mode, if they have been enabled by \fBwmousemask\fR. 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. .SH SEE ALSO \fBcurses\fR(3). .\"# .\"# The following sets edit modes for GNU EMACS .\"# Local Variables: .\"# mode:nroff .\"# fill-column:79 .\"# End: