[lcd4linux @ 2006-01-23 06:17:18 by reinelt]

timer widget added

1 files changed, 175 insertions, 0 deletions

diff --git a/widget_timer.c b/widget_timer.c
new file mode 100644
index 0000000..6c9c832
--- /dev/null
+++ b/widget_timer.c
@@ -0,0 +1,175 @@
+/* $Id: widget_timer.c,v 1.1 2006/01/23 06:17:18 reinelt Exp $
+ *
+ * timer 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_timer.c,v $
+ * Revision 1.1  2006/01/23 06:17:18  reinelt
+ * timer widget added
+ *
+ */
+
+/* 
+ * exported functions:
+ *
+ * WIDGET_CLASS Widget_Timer
+ *   the timer 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_timer.h"
+
+#ifdef WITH_DMALLOC
+#include <dmalloc.h>
+#endif
+
+void widget_timer_update(void *Self)
+{
+    WIDGET *W = (WIDGET *) Self;
+    WIDGET_TIMER *Timer = W->data;
+    RESULT result = { 0, 0, 0, NULL };
+
+    /* evaluate expressions */
+    Timer->update = 10;
+    if (Timer->update_tree != NULL) {
+	Eval(Timer->update_tree, &result);
+	Timer->update = R2N(&result);
+	if (Timer->update < 10)
+	    Timer->update = 10;
+	DelResult(&result);
+    }
+    
+    Timer->active = 1;
+    if (Timer->active_tree != NULL) {
+	Eval(Timer->active_tree, &result);
+	Timer->active = R2N(&result);
+	if (Timer->active < 0)
+	    Timer->active = 0;
+	DelResult(&result);
+    }
+    
+    /* finally, fire it! */
+    if (Timer->active) {
+	Eval(Timer->expr_tree, &result);
+	DelResult(&result);
+    }
+    
+    /* add a new one-shot timer */
+    timer_add(widget_timer_update, Self, Timer->update, 1);
+}
+
+
+
+int widget_timer_init(WIDGET * Self)
+{
+    char *section;
+    WIDGET_TIMER *Timer;
+
+    /* prepare config section */
+    /* strlen("Widget:")=7 */
+    section = malloc(strlen(Self->name) + 8);
+    strcpy(section, "Widget:");
+    strcat(section, Self->name);
+    
+    Timer = malloc(sizeof(WIDGET_TIMER));
+    memset(Timer, 0, sizeof(WIDGET_TIMER));
+
+    /* get raw expressions (we evaluate them ourselves) */
+    Timer->expression = cfg_get_raw(section, "axpression", NULL);
+    Timer->update_expr = cfg_get_raw(section, "update", "100");
+    Timer->active_expr = cfg_get_raw(section, "active", "1");
+    
+    /* sanity checks */
+    if (Timer->expression == NULL || *Timer->expression == '\0') {
+	error("Timer %s has no expression, using '1'", Self->name);
+	Timer->expression = "1";
+    }
+    if (Timer->update_expr == NULL || *Timer->update_expr == '\0') {
+	error("Timer %s has no update, using '100'", Self->name);
+	Timer->update_expr = "100";
+    }
+
+    /* compile'em */
+    Compile(Timer->expression, &Timer->expr_tree);
+    Compile(Timer->update_expr, &Timer->update_tree);
+    Compile(Timer->active_expr, &Timer->active_tree);
+    
+    
+    free(section);
+    Self->data = Timer;
+    
+    /* just do it! */
+    widget_timer_update(Self);
+
+    return 0;
+}
+
+
+int widget_timer_quit(WIDGET * Self)
+{
+    if (Self) {
+	/* do not deallocate child widget! */
+	if (Self->parent == NULL) {
+	    if (Self->data) {
+		WIDGET_TIMER *Timer = Self->data;
+		DelTree(Timer->expr_tree);
+		DelTree(Timer->update_tree);
+		DelTree(Timer->active_tree);
+		free(Self->data);
+		Self->data = NULL;
+	    }
+	}
+    }
+
+    return 0;
+
+}
+
+
+int widget_timer_register(void)
+{
+    WIDGET_CLASS wc;
+    wc = Widget_Timer;
+    widget_register(&wc);
+    return 0;
+}
+
+
+WIDGET_CLASS Widget_Timer = {
+  name:"timer",
+  type:WIDGET_TYPE_TIMER,
+  init:widget_timer_init,
+  draw:NULL,
+  quit:widget_timer_quit,
+};