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Diffstat (limited to '')
| -rw-r--r-- | widget_image.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/widget_image.c b/widget_image.c new file mode 100644 index 0000000..4b5c898 --- /dev/null +++ b/widget_image.c @@ -0,0 +1,174 @@ +/* $Id: widget_image.c,v 1.1 2006/01/22 09:16:11 reinelt Exp $ + * + * image widget handling + * + * Copyright (C) 2006 Michael Reinelt <reinelt@eunet.at> + * Copyright (C) 2006 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. + * + * + * $Log: widget_image.c,v $ + * Revision 1.1 2006/01/22 09:16:11 reinelt + * Image Widget framework added + * + */ + +/* + * exported functions: + * + * WIDGET_CLASS Widget_Image + * the image widget + * + */ + + +#include "config.h" + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <ctype.h> + +#include "debug.h" +#include "cfg.h" +#include "qprintf.h" +#include "evaluator.h" +#include "timer.h" +#include "widget.h" +#include "widget_image.h" + +#ifdef WITH_DMALLOC +#include <dmalloc.h> +#endif + +void widget_image_update(void *Self) +{ + WIDGET *W = (WIDGET *) Self; + WIDGET_IMAGE *Image = W->data; + RESULT result = { 0, 0, 0, NULL }; + + /* process the parent only */ + if (W->parent == NULL) { + + /* evaluate expressions */ + Image->update = 0; + if (Image->update_tree != NULL) { + Eval(Image->update_tree, &result); + Image->update = R2N(&result); + if (Image->update < 0) + Image->update = 0; + DelResult(&result); + } + + Image->visible = 1; + if (Image->visible_tree != NULL) { + Eval(Image->visible_tree, &result); + Image->visible = R2N(&result); + if (Image->visible < 0) + Image->visible = 0; + DelResult(&result); + } + } + + /* finally, draw it! */ + if (W->class->draw) + W->class->draw(W); + + /* add a new one-shot timer */ + timer_add(widget_image_update, Self, Image->update, 1); + +} + + + +int widget_image_init(WIDGET * Self) +{ + char *section; + WIDGET_IMAGE *Image; + + /* re-use the parent if one exists */ + if (Self->parent == NULL) { + + /* prepare config section */ + /* strlen("Widget:")=7 */ + section = malloc(strlen(Self->name) + 8); + strcpy(section, "Widget:"); + strcat(section, Self->name); + + Image = malloc(sizeof(WIDGET_IMAGE)); + memset(Image, 0, sizeof(WIDGET_IMAGE)); + + /* get raw expressions (we evaluate them ourselves) */ + Image->update_expr = cfg_get_raw(section, "update", NULL); + Image->visible_expr = cfg_get_raw(section, "visible", NULL); + + /* compile'em */ + Compile(Image->update_expr, &Image->update_tree); + Compile(Image->visible_expr, &Image->visible_tree); + + /* sanity check */ + if (Image->update_expr == NULL || *Image->update_expr == '\0') { + error("Image %s has no update, using '100'", Self->name); + Image->update_expr = "100"; + } + + free(section); + Self->data = Image; + + } else { + + /* re-use the parent */ + Self->data = Self->parent->data; + + } + + /* just do it! */ + widget_image_update(Self); + + return 0; +} + + +int widget_image_quit(WIDGET * Self) +{ + if (Self) { + /* do not deallocate child widget! */ + if (Self->parent == NULL) { + if (Self->data) { + WIDGET_IMAGE *Image = Self->data; + DelTree(Image->update_tree); + DelTree(Image->visible_tree); + if (Image->file) + free(Image->file); + free(Self->data); + Self->data = NULL; + } + } + } + + return 0; + +} + + + +WIDGET_CLASS Widget_Image = { + name:"image", + type:WIDGET_TYPE_VIS, + init:widget_image_init, + draw:NULL, + quit:widget_image_quit, +}; |