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-rw-r--r--widget_image.c174
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+/* $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,
+};