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Diffstat (limited to 'lib/widget/radio.c')
| -rw-r--r-- | lib/widget/radio.c | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/lib/widget/radio.c b/lib/widget/radio.c new file mode 100644 index 0000000..8fb52d8 --- /dev/null +++ b/lib/widget/radio.c @@ -0,0 +1,251 @@ +/* + Widgets for the Midnight Commander + + Copyright (C) 1994-2023 + Free Software Foundation, Inc. + + Authors: + Radek Doulik, 1994, 1995 + Miguel de Icaza, 1994, 1995 + Jakub Jelinek, 1995 + Andrej Borsenkow, 1996 + Norbert Warmuth, 1997 + Andrew Borodin <aborodin@vmail.ru>, 2009-2022 + + This file is part of the Midnight Commander. + + The Midnight Commander is free software: you can redistribute it + and/or modify it under the terms of the GNU General Public License as + published by the Free Software Foundation, either version 3 of the License, + or (at your option) any later version. + + The Midnight Commander is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +/** \file radio.c + * \brief Source: WRadui widget (radiobuttons) + */ + +#include <config.h> + +#include <stdlib.h> + +#include "lib/global.h" + +#include "lib/tty/tty.h" +#include "lib/widget.h" + +/*** global variables ****************************************************************************/ + +const global_keymap_t *radio_map = NULL; + +/*** file scope macro definitions ****************************************************************/ + +/*** file scope type declarations ****************************************************************/ + +/*** forward declarations (file scope functions) *************************************************/ + +/*** file scope variables ************************************************************************/ + +/* --------------------------------------------------------------------------------------------- */ +/*** file scope functions ************************************************************************/ +/* --------------------------------------------------------------------------------------------- */ + +static cb_ret_t +radio_execute_cmd (WRadio * r, long command) +{ + cb_ret_t ret = MSG_HANDLED; + Widget *w = WIDGET (r); + + switch (command) + { + case CK_Up: + case CK_Top: + if (r->pos == 0) + return MSG_NOT_HANDLED; + + if (command == CK_Top) + r->pos = 0; + else + r->pos--; + widget_draw (w); + return MSG_HANDLED; + + case CK_Down: + case CK_Bottom: + if (r->pos == r->count - 1) + return MSG_NOT_HANDLED; + + if (command == CK_Bottom) + r->pos = r->count - 1; + else + r->pos++; + widget_draw (w); + return MSG_HANDLED; + + case CK_Select: + r->sel = r->pos; + widget_set_state (w, WST_FOCUSED, TRUE); /* Also draws the widget */ + send_message (w->owner, w, MSG_NOTIFY, 0, NULL); + return MSG_HANDLED; + + default: + ret = MSG_NOT_HANDLED; + break; + } + + return ret; +} + +/* --------------------------------------------------------------------------------------------- */ + +/* Return MSG_HANDLED if we want a redraw */ +static cb_ret_t +radio_key (WRadio * r, int key) +{ + long command; + + command = widget_lookup_key (WIDGET (r), key); + if (command == CK_IgnoreKey) + return MSG_NOT_HANDLED; + return radio_execute_cmd (r, command); +} + +/* --------------------------------------------------------------------------------------------- */ + +static cb_ret_t +radio_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *data) +{ + WRadio *r = RADIO (w); + int i; + + switch (msg) + { + case MSG_HOTKEY: + for (i = 0; i < r->count; i++) + { + if (r->texts[i].hotkey != NULL) + { + int c; + + c = g_ascii_tolower ((gchar) r->texts[i].hotkey[0]); + if (c != parm) + continue; + r->pos = i; + + /* Take action */ + send_message (w, sender, MSG_ACTION, CK_Select, data); + return MSG_HANDLED; + } + } + return MSG_NOT_HANDLED; + + case MSG_KEY: + return radio_key (r, parm); + + case MSG_ACTION: + return radio_execute_cmd (r, parm); + + case MSG_CURSOR: + widget_gotoyx (r, r->pos, 1); + return MSG_HANDLED; + + case MSG_DRAW: + { + gboolean focused; + + focused = widget_get_state (w, WST_FOCUSED); + + for (i = 0; i < r->count; i++) + { + widget_selectcolor (w, i == r->pos && focused, FALSE); + widget_gotoyx (w, i, 0); + tty_draw_hline (w->rect.y + i, w->rect.x, ' ', w->rect.cols); + tty_print_string ((r->sel == i) ? "(*) " : "( ) "); + hotkey_draw (w, r->texts[i], i == r->pos && focused); + } + + return MSG_HANDLED; + } + + case MSG_DESTROY: + for (i = 0; i < r->count; i++) + hotkey_free (r->texts[i]); + g_free (r->texts); + return MSG_HANDLED; + + default: + return widget_default_callback (w, sender, msg, parm, data); + } +} + +/* --------------------------------------------------------------------------------------------- */ + +static void +radio_mouse_callback (Widget * w, mouse_msg_t msg, mouse_event_t * event) +{ + switch (msg) + { + case MSG_MOUSE_DOWN: + RADIO (w)->pos = event->y; + widget_select (w); + break; + + case MSG_MOUSE_CLICK: + RADIO (w)->pos = event->y; + send_message (w, NULL, MSG_ACTION, CK_Select, NULL); + send_message (w->owner, w, MSG_POST_KEY, ' ', NULL); + break; + + default: + break; + } +} + +/* --------------------------------------------------------------------------------------------- */ +/*** public functions ****************************************************************************/ +/* --------------------------------------------------------------------------------------------- */ + +WRadio * +radio_new (int y, int x, int count, const char **texts) +{ + WRect r0 = { y, x, count, 1 }; + WRadio *r; + Widget *w; + int i, wmax = 0; + + r = g_new (WRadio, 1); + w = WIDGET (r); + + /* Compute the longest string */ + r->texts = g_new (hotkey_t, count); + + for (i = 0; i < count; i++) + { + int width; + + r->texts[i] = hotkey_new (texts[i]); + width = hotkey_width (r->texts[i]); + wmax = MAX (width, wmax); + } + + /* 4 is width of "(*) " */ + r0.cols = 4 + wmax; + widget_init (w, &r0, radio_callback, radio_mouse_callback); + w->options |= WOP_SELECTABLE | WOP_WANT_CURSOR | WOP_WANT_HOTKEY; + w->keymap = radio_map; + + r->pos = 0; + r->sel = 0; + r->count = count; + + return r; +} + +/* --------------------------------------------------------------------------------------------- */ |