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   wenclose.3x    ( 3 )

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Имя (Name)

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

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Синопсис (Synopsis)

#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);

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Описание (Description)

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

mousemask 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.

Mouse events 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 ─────────────────────────────────────────────────────────────────────

getmouse Once a class of mouse events has been made visible in a window, calling the wgetch function on that window may return KEY_MOUSE as an indicator 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 otherwise. When getmouse returns OK, 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 getmouse will retrieve the next older item from the queue.

ungetmouse 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.

wenclose 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.

wmouse_trafo The wmouse_trafo function transforms a given pair of coordinates from stdscr-relative coordinates to coordinates relative to the given window or vice versa. The resulting stdscr-relative coordinates are not always identical to window-relative coordinates due to the mechanism to reserve lines on top or bottom of the screen for other purposes (see the ripoffline and slk_init(3X) calls, for example).

• If the parameter to_screen is TRUE, the pointers pY, pX must reference the coordinates of a location inside the window win. They are converted to window-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 coordinates 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. The referenced coordinates are only replaced by the converted coordinates if the transformation was successful.

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

mouseinterval 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 resolution. This function returns the previous interval value. Use mouseinterval(-1) to obtain the interval without altering it. The default is one sixth of a second.

has_mouse The has_mouse 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 getstr that expects a linefeed for input-loop termination.

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