dtv-scan-tables.git - Digital TV scan tables

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/* $Id$ * $URL$ * * bar widget handling * * Copyright (C) 2003, 2004 Michael Reinelt <reinelt@eunet.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.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; } /* 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; break; case 'W': Bar->direction = DIR_WEST; break; case 'N': Bar->direction = DIR_NORTH; break; case 'S': Bar->direction = DIR_SOUTH; break; default: error("widget %s has unknown direction '%s', using 'East'", 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; if (!(Bar->direction & (DIR_EAST | DIR_WEST))) { error("widget %s with style \"hollow\" not implemented", Self->name); Bar->style = 0; } break; default: 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_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, };


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