[lcd4linux @ 2006-02-21 05:50:34 by reinelt]

keypad support from Cris Maj

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@641 3ae390bd-cb1e-0410-b409-cd5a39f66f1f

1 files changed, 176 insertions, 0 deletions

diff --git a/widget_keypad.c b/widget_keypad.c
new file mode 100644
index 0000000..8c278b1
--- /dev/null
+++ b/widget_keypad.c
@@ -0,0 +1,176 @@
+/* $Id: widget_keypad.c,v 1.1 2006/02/21 05:50:34 reinelt Exp $
+ *
+ * keypad widget handling
+ *
+ * Copyright (C) 2006 Chris Maj <cmaj@freedomcorpse.com>
+ * 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_keypad.c,v $
+ * Revision 1.1  2006/02/21 05:50:34  reinelt
+ * keypad support from Cris Maj
+ *
+ *
+ */
+
+/* 
+ * exported functions:
+ *
+ * WIDGET_CLASS Widget_Keypad
+ *   the keypad 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_keypad.h"
+
+#ifdef WITH_DMALLOC
+#include <dmalloc.h>
+#endif
+
+
+void widget_keypad_update(void *Self)
+{
+    WIDGET *W = (WIDGET *) Self;
+    WIDGET_KEYPAD *keypad = W->data;
+    RESULT result = { 0, 0, 0, NULL };
+
+    int val;
+
+    /* evaluate expression */
+    val = 0;
+    if (keypad->tree != NULL) {
+	Eval(keypad->tree, &result);
+	val = R2N(&result);
+	DelResult(&result);
+    }
+    keypad->val = val;
+
+    /* finally, draw it! */
+    if (W->class->draw)
+	W->class->draw(W);
+
+}
+
+
+int widget_keypad_init(WIDGET * Self)
+{
+    char *section;
+    char *c;
+    WIDGET_KEYPAD *keypad;
+
+    /* prepare config section */
+    /* strlen("Widget:")=7 */
+    section = malloc(strlen(Self->name) + 8);
+    strcpy(section, "Widget:");
+    strcat(section, Self->name);
+
+    keypad = malloc(sizeof(WIDGET_KEYPAD));
+    memset(keypad, 0, sizeof(WIDGET_KEYPAD));
+
+    /* get raw expression (we evaluate them ourselves) */
+    keypad->expression = cfg_get_raw(section, "expression", NULL);
+
+    /* sanity check */
+    if (keypad->expression == NULL || *keypad->expression == '\0') {
+	error("widget %s has no expression, using '0.0'", Self->name);
+	keypad->expression = "0";
+    }
+
+    /* compile expression */
+    Compile(keypad->expression, &keypad->tree);
+
+    /* state: pressed (default), released */
+    c = cfg_get(section, "state", "pressed");
+    if (!strcasecmp(c, "released"))
+	keypad->key = KEY_RELEASED;
+    else
+	keypad->key = KEY_PRESSED;
+
+    /* position: confirm (default), up, down, left, right, cancel */
+    c = cfg_get(section, "position", "confirm");
+    if (!strcasecmp(c, "up"))
+	keypad->key += KEY_UP;
+    else if (!strcasecmp(c, "down"))
+	keypad->key += KEY_DOWN;
+    else if (!strcasecmp(c, "left"))
+	keypad->key += KEY_LEFT;
+    else if (!strcasecmp(c, "right"))
+	keypad->key += KEY_RIGHT;
+    else if (!strcasecmp(c, "cancel"))
+	keypad->key += KEY_CANCEL;
+    else
+	keypad->key += KEY_CONFIRM;
+
+    free(section);
+    Self->data = keypad;
+
+    return 0;
+}
+
+int widget_keypad_find(WIDGET * Self, void *needle)
+{
+    WIDGET_KEYPAD *keypad;
+    unsigned int *n = needle;
+
+    if (Self) {
+	if (Self->data) {
+	    keypad = Self->data;
+	    if (keypad->key == *n)
+		return 0;
+	}
+    }
+
+    return -1;
+}
+
+int widget_keypad_quit(WIDGET * Self)
+{
+    if (Self) {
+	if (Self->data) {
+	    WIDGET_KEYPAD *KEYPAD = Self->data;
+	    DelTree(KEYPAD->tree);
+	    free(Self->data);
+	}
+	Self->data = NULL;
+    }
+    return 0;
+}
+
+
+
+WIDGET_CLASS Widget_Keypad = {
+  name:"keypad",
+  type:WIDGET_TYPE_KEYPAD,
+  init:widget_keypad_init,
+  draw:NULL,
+  find:widget_keypad_find,
+  update:widget_keypad_update,
+  quit:widget_keypad_quit,
+};