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Diffstat (limited to 'lib/widget/label.c')
| -rw-r--r-- | lib/widget/label.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/lib/widget/label.c b/lib/widget/label.c new file mode 100644 index 0000000..5a04a0f --- /dev/null +++ b/lib/widget/label.c @@ -0,0 +1,201 @@ +/* + 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 label.c + * \brief Source: WLabel widget + */ + +#include <config.h> + +#include <stdarg.h> +#include <stdlib.h> +#include <string.h> + +#include "lib/global.h" + +#include "lib/tty/tty.h" +#include "lib/tty/color.h" +#include "lib/skin.h" +#include "lib/strutil.h" +#include "lib/widget.h" + +/*** global variables ****************************************************************************/ + +/*** file scope macro definitions ****************************************************************/ + +/*** file scope type declarations ****************************************************************/ + +/*** forward declarations (file scope functions) *************************************************/ + +/*** file scope variables ************************************************************************/ + +/* --------------------------------------------------------------------------------------------- */ +/*** file scope functions ************************************************************************/ +/* --------------------------------------------------------------------------------------------- */ + +static cb_ret_t +label_callback (Widget * w, Widget * sender, widget_msg_t msg, int parm, void *data) +{ + WLabel *l = LABEL (w); + + switch (msg) + { + case MSG_DRAW: + { + char *p = l->text; + int y = 0; + gboolean disabled; + align_crt_t align; + + if (l->text == NULL) + return MSG_HANDLED; + + disabled = widget_get_state (w, WST_DISABLED); + + if (l->transparent) + tty_setcolor (disabled ? DISABLED_COLOR : DEFAULT_COLOR); + else + { + const int *colors; + + colors = widget_get_colors (w); + tty_setcolor (disabled ? DISABLED_COLOR : colors[DLG_COLOR_NORMAL]); + } + + align = (w->pos_flags & WPOS_CENTER_HORZ) != 0 ? J_CENTER_LEFT : J_LEFT; + + while (TRUE) + { + char *q; + char c = '\0'; + + + q = strchr (p, '\n'); + if (q != NULL) + { + c = q[0]; + q[0] = '\0'; + } + + widget_gotoyx (w, y, 0); + tty_print_string (str_fit_to_term (p, w->rect.cols, align)); + + if (q == NULL) + break; + + q[0] = c; + p = q + 1; + y++; + } + return MSG_HANDLED; + } + + case MSG_DESTROY: + g_free (l->text); + return MSG_HANDLED; + + default: + return widget_default_callback (w, sender, msg, parm, data); + } +} + +/* --------------------------------------------------------------------------------------------- */ +/*** public functions ****************************************************************************/ +/* --------------------------------------------------------------------------------------------- */ + +WLabel * +label_new (int y, int x, const char *text) +{ + WRect r = { y, x, 1, 1 }; + WLabel *l; + Widget *w; + + if (text != NULL) + str_msg_term_size (text, &r.lines, &r.cols); + + l = g_new (WLabel, 1); + w = WIDGET (l); + widget_init (w, &r, label_callback, NULL); + + l->text = g_strdup (text); + l->auto_adjust_cols = TRUE; + l->transparent = FALSE; + + return l; +} + +/* --------------------------------------------------------------------------------------------- */ + +void +label_set_text (WLabel * label, const char *text) +{ + Widget *w = WIDGET (label); + int newcols = w->rect.cols; + int newlines; + + if (label->text != NULL && text != NULL && strcmp (label->text, text) == 0) + return; /* Flickering is not nice */ + + g_free (label->text); + + if (text == NULL) + label->text = NULL; + else + { + label->text = g_strdup (text); + if (label->auto_adjust_cols) + { + str_msg_term_size (text, &newlines, &newcols); + w->rect.cols = MAX (newcols, w->rect.cols); + w->rect.lines = MAX (newlines, w->rect.lines); + } + } + + widget_draw (w); + + w->rect.cols = MIN (newcols, w->rect.cols); +} + +/* --------------------------------------------------------------------------------------------- */ + +void +label_set_textv (WLabel * label, const char *format, ...) +{ + va_list args; + char buf[BUF_1K]; /* FIXME: is it enough? */ + + va_start (args, format); + g_vsnprintf (buf, sizeof (buf), format, args); + va_end (args); + + label_set_text (label, buf); +} + +/* --------------------------------------------------------------------------------------------- */ |