ui_ncurses_input.c File Reference

NCurses UI backend — input handling. More...

#include "ui_backend.h"
#include "ui_ncurses_internal.h"
#include <stddef.h>
#include <string.h>
#include <termios.h>

Include dependency graph for ui_ncurses_input.c:

Go to the source code of this file.

Functions
int	ui_get_event (UiSurface *s, uint w, UiEvent *ev, int timeout_ms)
	Wait for an input event on target (or stdscr if NULL).
int	ui_get_event_multi (UiSurface *s, uint w, UiEvent *ev, int timeout_ms)
int	ui_get_event_no_mouse (UiSurface *s, uint w, UiEvent *ev)
int	ui_mice_enable (int mask)
int	ui_mousemask (int mask)

Detailed Description

NCurses UI backend — input handling.

Translates raw NCurses key codes and mouse events into the portable UiEvent representation defined in ui_backend.h.

Definition in file ui_ncurses_input.c.

Function Documentation

ui_get_event()

int ui_get_event	(	UiSurface *	s,
		uint	w,
		UiEvent *	ev,
		int	timeout_ms )

Wait for an input event on target (or stdscr if NULL).

Parameters

ui	UI runtime context (unused — event comes from the window).
target	Surface to read from, or NULL for stdscr.
ev	Output UiEvent structure.
timeout_ms	Milliseconds to wait; -1 = block indefinitely.

Returns

0 on success, -1 if ev is NULL.

Definition at line 103 of file ui_ncurses_input.c.

                                                                    {
    if (!ev)
        return -1;
    memset(ev, 0, sizeof(*ev));
    tcflush(2, TCIFLUSH);
    if (timeout_ms <= 0) {
        timeout_ms = -1;
    } else
        wtimeout(s->mwin[w], timeout_ms);
    mousemask(ALL_MOUSE_EVENTS | REPORT_MOUSE_POSITION | BUTTON_SHIFT | BUTTON_CTRL | BUTTON_ALT, NULL);
    curs_set(2);
    int ch = wgetch(s->mwin[w]);
    curs_set(0);
    ev->key = translate_key(ch);
    if (ev->key == UI_KEY_CHAR) {
        ev->ch = (uint32_t)ch;
    } else if (ev->key == UI_KEY_MOUSE) {
        MEVENT me;
        if (getmouse(&me) == OK) {
            ev->y = me.y;
            ev->x = me.x;
            if (me.bstate & BUTTON4_PRESSED)
                ev->mouse_action = UI_MOUSE_SCROLL_UP;
            else if (me.bstate & BUTTON5_PRESSED)
                ev->mouse_action = UI_MOUSE_SCROLL_DOWN;
            else if (me.bstate & BUTTON1_PRESSED)
                ev->mouse_action = UI_MOUSE_PRESS;
            else if (me.bstate & BUTTON1_RELEASED)
                ev->mouse_action = UI_MOUSE_RELEASE;
            if (wenclose(s->mwin[w], me.y, me.x) &&
                wmouse_trafo(s->mwin[w], &me.y, &me.x, false)) {
                ev->bstate = me.bstate;
                ev->mouse_inside = true;
                ev->y = me.y;
                ev->x = me.x;
            } else {
                ev->mouse_inside = false;
            }
        }
    }
    return ch;
}

ui_get_event_multi()

int ui_get_event_multi	(	UiSurface *	s,
		uint	w,
		UiEvent *	ev,
		int	timeout_ms )

Definition at line 146 of file ui_ncurses_input.c.

                                                                          {
    int i;
    if (!ev)
        return -1;
    memset(ev, 0, sizeof(*ev));
    keypad(s->mwin[w], true);
    if (timeout_ms <= 0) {
        timeout_ms = -1;
    } else
        wtimeout(s->mwin[w], timeout_ms);
    mousemask(ALL_MOUSE_EVENTS | REPORT_MOUSE_POSITION | BUTTON_SHIFT | BUTTON_CTRL | BUTTON_ALT, NULL);
    ev->chyron = -1;
    qiflush();
    tcflush(2, TCIFLUSH);
    cbreak();
    curs_set(2);
    int ch = wgetch(s->mwin[w]);
    curs_set(0);
    ev->mouse_action = UI_MOUSE_NONE;
    ev->key = translate_key(ch);
    if (ev->key == UI_KEY_CHAR) {
        ev->ch = (uint32_t)ch;
    } else if (ev->key == UI_KEY_MOUSE) {
        MEVENT me;
        if (getmouse(&me) == OK) {
            ev->y = me.y;
            ev->x = me.x;
            if (me.bstate & BUTTON4_PRESSED)
                ev->mouse_action = UI_MOUSE_SCROLL_UP;
            else if (me.bstate & BUTTON5_PRESSED)
                ev->mouse_action = UI_MOUSE_SCROLL_DOWN;
            else if (me.bstate & BUTTON1_CLICKED ||
                     me.bstate & BUTTON1_PRESSED ||
                     me.bstate & BUTTON1_DOUBLE_CLICKED) {
                ev->mouse_action = UI_MOUSE_PRESS;
                ev->in_win = -1;
                for (i = WIN; i < SUB_SFC_MAX; i++) {
                    if (s->mwin[i] != NULL &&
                        wenclose(s->mwin[i], me.y, me.x) &&
                        wmouse_trafo(s->mwin[i], &me.y, &me.x, false)) {
                        ev->in_win = i;
                        ev->key = 0;
                        break;
                    }
                }
                ev->bstate = me.bstate;
                ev->y = me.y;
                ev->x = me.x;
                ev->key = 0;
                return 0;
            }
        }
    }
    curs_set(0);
    return ch;
}

ui_get_event_no_mouse()

int ui_get_event_no_mouse	(	UiSurface *	s,
		uint	w,
		UiEvent *	ev )

Definition at line 203 of file ui_ncurses_input.c.

                                                             {
    int ch;
    mousemask(0, NULL);
 
    qiflush();
    tcflush(2, TCIFLUSH);
    cbreak();
    do {
        curs_set(2);
        ch = wgetch(s->mwin[w]);
        curs_set(0);
        ev->key = translate_key(ch);
        if (ev->key == UI_KEY_CHAR) {
            ev->ch = (uint32_t)ch;
            break;
        }
    } while (ch == ERR);
    return ch;
}

ui_mice_enable()

int ui_mice_enable

(

int

mask

)

Definition at line 234 of file ui_ncurses_input.c.

                             {
    if (!ui)
        return -1;
    if (mask)
        mousemask(mask, nullptr);
    else
        mousemask(ALL_MOUSE_EVENTS | REPORT_MOUSE_POSITION, nullptr);
    return 0;
}

ui_mousemask()

int ui_mousemask

(

int

mask

)

Definition at line 225 of file ui_ncurses_input.c.

                           {
    if (!ui)
        return -1;
    if (mask)
        mousemask(mask, nullptr);
    else
        mousemask(ALL_MOUSE_EVENTS | REPORT_MOUSE_POSITION, nullptr);
    return 0;
}