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/* $Id: widget_image.c,v 1.2 2006/01/23 06:17:18 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 1.2 2006/01/23 06:17:18 reinelt
* timer widget added
*
* 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);
/* 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";
}
/* compile'em */
Compile(Image->update_expr, &Image->update_tree);
Compile(Image->visible_expr, &Image->visible_tree);
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_XY,
init:widget_image_init,
draw:NULL,
quit:widget_image_quit,
};
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