diff options
Diffstat (limited to 'widget_bar.c')
| -rw-r--r-- | widget_bar.c | 240 |
1 files changed, 240 insertions, 0 deletions
diff --git a/widget_bar.c b/widget_bar.c new file mode 100644 index 0000000..3399a04 --- /dev/null +++ b/widget_bar.c @@ -0,0 +1,240 @@ +/* $Id: widget_bar.c 1106 2010-02-07 14:03:46Z mzuther $ + * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/widget_bar.c $ + * + * bar widget handling + * + * Copyright (C) 2003, 2004 Michael Reinelt <michael@reinelt.co.at> + * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net> + * + * This program 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 2, or (at your option) + * any later version. + * + * This program 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, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + */ + +/* + * exported functions: + * + * WIDGET_CLASS Widget_Bar + * the bar widget + * + */ + + +#include "config.h" + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <ctype.h> + +#include "debug.h" +#include "cfg.h" +#include "property.h" +#include "timer_group.h" +#include "widget.h" +#include "widget_bar.h" + +#ifdef WITH_DMALLOC +#include <dmalloc.h> +#endif + + +void widget_bar_update(void *Self) +{ + WIDGET *W = (WIDGET *) Self; + WIDGET_BAR *Bar = W->data; + + double val1, val2; + double min, max; + + /* evaluate properties */ + property_eval(&Bar->expression1); + val1 = P2N(&Bar->expression1); + + if (property_valid(&Bar->expression2)) { + property_eval(&Bar->expression2); + val2 = P2N(&Bar->expression2); + } else { + val2 = val1; + } + + /* minimum: if expression is empty, do auto-scaling */ + if (property_valid(&Bar->expr_min)) { + property_eval(&Bar->expr_min); + min = P2N(&Bar->expr_min); + } else { + min = Bar->min; + if (val1 < min) { + min = val1; + } + if (val2 < min) { + min = val2; + } + } + + /* maximum: if expression is empty, do auto-scaling */ + if (property_valid(&Bar->expr_max)) { + property_eval(&Bar->expr_max); + max = P2N(&Bar->expr_max); + } else { + max = Bar->max; + if (val1 > max) { + max = val1; + } + if (val2 > max) { + max = val2; + } + } + + /* debugging */ + if (Bar->min != min || Bar->max != max) { + debug("Bar '%s': new scale %G - %G", W->name, min, max); + } + + /* calculate bar values */ + Bar->min = min; + Bar->max = max; + if (max > min) { + Bar->val1 = (val1 - min) / (max - min); + Bar->val2 = (val2 - min) / (max - min); + } else { + Bar->val1 = 0.0; + Bar->val2 = 0.0; + } + + /* finally, draw it! */ + if (W->class->draw) + W->class->draw(W); + +} + + +int widget_bar_init(WIDGET * Self) +{ + char *section; + char *c; + WIDGET_BAR *Bar; + + /* prepare config section */ + /* strlen("Widget:")=7 */ + section = malloc(strlen(Self->name) + 8); + strcpy(section, "Widget:"); + strcat(section, Self->name); + + Bar = malloc(sizeof(WIDGET_BAR)); + memset(Bar, 0, sizeof(WIDGET_BAR)); + + /* load properties */ + property_load(section, "expression", NULL, &Bar->expression1); + property_load(section, "expression2", NULL, &Bar->expression2); + property_load(section, "min", NULL, &Bar->expr_min); + property_load(section, "max", NULL, &Bar->expr_max); + + /* sanity checks */ + if (!property_valid(&Bar->expression1)) { + error("Warning: widget %s has no expression", section); + } + + /* bar length, default 1 */ + cfg_number(section, "length", 1, 0, -1, &(Bar->length)); + + /* direction: East (default), West, North, South */ + c = cfg_get(section, "direction", "E"); + switch (toupper(*c)) { + case 'E': + Bar->direction = DIR_EAST; + Self->x2 = Self->col + Bar->length - 1; + Self->y2 = Self->row; + break; + case 'W': + Bar->direction = DIR_WEST; + Self->x2 = Self->col + Bar->length - 1; + Self->y2 = Self->row; + break; + case 'N': + Bar->direction = DIR_NORTH; + Self->x2 = Self->col; + Self->y2 = Self->row + Bar->length - 1; + break; + case 'S': + Bar->direction = DIR_SOUTH; + Self->x2 = Self->col; + Self->y2 = Self->row + Bar->length - 1; + break; + default: + error("widget %s has unknown direction '%s'; known directions: 'E', 'W', 'N', 'S'; using 'E(ast)'", Self->name, + c); + Bar->direction = DIR_EAST; + } + free(c); + + /* style: none (default), hollow */ + c = cfg_get(section, "style", "0"); + switch (toupper(*c)) { + case 'H': + Bar->style = STYLE_HOLLOW; + break; + case '0': + Bar->style = 0; + break; + default: + error("widget %s has unknown style '%s'; known styles: '0' or 'H'; using '0'", Self->name, c); + Bar->style = 0; + } + free(c); + + /* update interval (msec), default 1 sec */ + cfg_number(section, "update", 1000, 10, -1, &(Bar->update)); + + /* get widget special colors */ + Bar->color_valid[0] = widget_color(section, Self->name, "barcolor0", &Bar->color[0]); + Bar->color_valid[1] = widget_color(section, Self->name, "barcolor1", &Bar->color[1]); + + free(section); + Self->data = Bar; + + timer_add_widget(widget_bar_update, Self, Bar->update, 0); + + return 0; +} + + +int widget_bar_quit(WIDGET * Self) +{ + if (Self) { + if (Self->data) { + WIDGET_BAR *Bar = Self->data; + property_free(&Bar->expression1); + property_free(&Bar->expression2); + property_free(&Bar->expr_min); + property_free(&Bar->expr_max); + free(Self->data); + } + Self->data = NULL; + } + + + return 0; + +} + + + +WIDGET_CLASS Widget_Bar = { + .name = "bar", + .type = WIDGET_TYPE_RC, + .init = widget_bar_init, + .draw = NULL, + .quit = widget_bar_quit, +}; |