[lcd4linux @ 2003-09-19 03:51:29 by reinelt]

minor fixes, widget.c added

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@245 3ae390bd-cb1e-0410-b409-cd5a39f66f1f

1 files changed, 102 insertions, 0 deletions

diff --git a/widget.c b/widget.c
new file mode 100644
index 0000000..0c01481
--- /dev/null
+++ b/widget.c
@@ -0,0 +1,102 @@
+/* $Id: widget.c,v 1.1 2003/09/19 03:51:29 reinelt Exp $
+ *
+ * generic widget handling
+ *
+ * written 2003 by Michael Reinelt (reinelt@eunet.at)
+ *
+ * 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.c,v $
+ * Revision 1.1  2003/09/19 03:51:29  reinelt
+ * minor fixes, widget.c added
+ *
+ */
+
+/* 
+ * exported functions:
+ *
+ * int widget_junk(void)
+ *   does something
+ *
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "debug.h"
+#include "cfg.h"
+#include "widget.h"
+
+static int ROWS=0;
+static int COLS=0;
+static int XRES=0;
+static int YRES=0;
+
+static int *Screen=NULL;
+static WIDGET *Widget=NULL;
+static int nWidget=0;
+
+
+int widget_init (int rows, int cols, int xres, int yres)
+{
+  if (rows<1 || cols<1) 
+    return -1;
+  
+  ROWS=rows;
+  COLS=cols;
+  XRES=xres;
+  YRES=yres;
+  
+  if ((Screen=malloc(ROWS*COLS*sizeof(*Screen)))==NULL) {
+    error ("widget buffer allocation failed: out of memory?");
+    return -1;
+  }
+ 
+  nWidget=0;
+  Widget=NULL;
+return 0;
+}
+
+
+void widget_clear (void)
+{
+  int n;
+  
+  for (n=0; n<ROWS*COLS; n++) {
+    Screen[n]=-1;
+  }
+  
+}
+
+
+int widget_add ()
+{
+  nWidget++;
+  Widget=realloc(Widget, nWidget*sizeof(*Widget));
+  
+  return 0;
+}
+
+
+int widget_peek (int row, int col)
+{
+  if (Screen) 
+    return Screen[row*COLS+col];
+  else
+    return -1;
+}