1 files changed, 130 insertions, 0 deletions
diff --git a/widget_gpo.c b/widget_gpo.c
new file mode 100644
index 0000000..2b56f32
--- /dev/null
+++ b/widget_gpo.c
@@ -0,0 +1,130 @@
+/* $Id: widget_gpo.c 1106 2010-02-07 14:03:46Z mzuther $
+ * $URL: https://ssl.bulix.org/svn/lcd4linux/trunk/widget_gpo.c $
+ *
+ * GPO widget handling
+ *
+ * Copyright (C) 2005 Michael Reinelt <michael@reinelt.co.at>
+ * Copyright (C) 2005, 2006, 2007 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_GPO
+ *   the GPO 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_gpo.h"
+
+#ifdef WITH_DMALLOC
+#include <dmalloc.h>
+#endif
+
+
+void widget_gpo_update(void *Self)
+{
+    WIDGET *W = (WIDGET *) Self;
+    WIDGET_GPO *GPO = W->data;
+
+    /* evaluate properties */
+    property_eval(&GPO->expression);
+    property_eval(&GPO->update);
+
+    /* finally, draw it! */
+    if (W->class->draw)
+	W->class->draw(W);
+
+    /* add a new one-shot timer */
+    if (P2N(&GPO->update) > 0) {
+	timer_add_widget(widget_gpo_update, Self, P2N(&GPO->update), 1);
+    }
+
+}
+
+
+int widget_gpo_init(WIDGET * Self)
+{
+    char *section;
+    WIDGET_GPO *GPO;
+
+    /* prepare config section */
+    /* strlen("Widget:")=7 */
+    section = malloc(strlen(Self->name) + 8);
+    strcpy(section, "Widget:");
+    strcat(section, Self->name);
+
+    GPO = malloc(sizeof(WIDGET_GPO));
+    memset(GPO, 0, sizeof(WIDGET_GPO));
+
+    /* load properties */
+    property_load(section, "expression", NULL, &GPO->expression);
+    property_load(section, "update", "1000", &GPO->update);
+
+    /* sanity checks */
+    if (!property_valid(&GPO->expression)) {
+	error("Warning: widget %s has no expression", section);
+    }
+
+    free(section);
+    Self->data = GPO;
+    /* no display dimension */
+    Self->x2 = NOCOORD;
+    Self->y2 = NOCOORD;
+
+    /* fire it the first time */
+    widget_gpo_update(Self);
+
+    return 0;
+}
+
+
+int widget_gpo_quit(WIDGET * Self)
+{
+    if (Self && Self->data) {
+	WIDGET_GPO *GPO = Self->data;
+	property_free(&GPO->expression);
+	property_free(&GPO->update);
+	free(Self->data);
+	Self->data = NULL;
+    }
+    return 0;
+}
+
+
+
+WIDGET_CLASS Widget_GPO = {
+    .name = "gpo",
+    .type = WIDGET_TYPE_GPO,
+    .init = widget_gpo_init,
+    .draw = NULL,
+    .quit = widget_gpo_quit,
+};