From f57473f6a80c5776474fe300bb599f7f86389507 Mon Sep 17 00:00:00 2001
From: reinelt <>
Date: Sun, 18 Dec 2005 16:18:36 +0000
Subject: [lcd4linux @ 2005-12-18 16:18:34 by reinelt] GPO's added again

---
 widget_gpo.c | 141 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100644 widget_gpo.c

(limited to 'widget_gpo.c')

diff --git a/widget_gpo.c b/widget_gpo.c
new file mode 100644
index 0000000..a53b012
--- /dev/null
+++ b/widget_gpo.c
@@ -0,0 +1,141 @@
+/* $Id: widget_gpo.c,v 1.1 2005/12/18 16:18:36 reinelt Exp $
+ *
+ * GPO widget handling
+ *
+ * Copyright (C) 2005 Michael Reinelt <reinelt@eunet.at>
+ * Copyright (C) 2005 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_gpo.c,v $
+ * Revision 1.1  2005/12/18 16:18:36  reinelt
+ * GPO's added again
+ *
+ */
+
+/* 
+ * 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 "evaluator.h"
+#include "timer.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;
+    RESULT result = { 0, 0, 0, NULL };
+
+    int val;
+
+    /* evaluate expression */
+    val = 0;
+    if (GPO->tree != NULL) {
+	Eval(GPO->tree, &result);
+	val = R2N(&result);
+	DelResult(&result);
+    }
+    GPO->num = W->row;
+    GPO->val = val;
+
+    /* finally, draw it! */
+    if (W->class->draw)
+	W->class->draw(W);
+
+}
+
+
+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));
+
+    /* get raw expression (we evaluate them ourselves) */
+    GPO->expression = cfg_get_raw(section, "expression", NULL);
+
+    /* sanity check */
+    if (GPO->expression == NULL || *GPO->expression == '\0') {
+	error("widget %s has no expression, using '0.0'", Self->name);
+	GPO->expression = "0";
+    }
+
+    /* compile expression */
+    Compile(GPO->expression, &GPO->tree);
+
+    /* update interval (msec), default 1 sec */
+    cfg_number(section, "update", 1000, 10, -1, &(GPO->update));
+
+    free(section);
+    Self->data = GPO;
+
+    timer_add(widget_gpo_update, Self, GPO->update, 0);
+
+    return 0;
+}
+
+
+int widget_gpo_quit(WIDGET * Self)
+{
+    if (Self) {
+	if (Self->data) {
+	    WIDGET_GPO *GPO = Self->data;
+	    DelTree(GPO->tree);
+	    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,
+};
-- 
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