1 files changed, 118 insertions, 0 deletions
diff --git a/source/gui.c b/source/gui.c
new file mode 100644
index 0000000..45b0817
--- /dev/null
+++ b/source/gui.c
@@ -0,0 +1,118 @@
+/*
+   ds81 - Nintendo DS ZX81 emulator.
+
+   Copyright (C) 2006  Ian Cowburn
+   
+   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
+   of the License, 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+  
+   $Id$
+*/
+
+#include <nds.h>
+#include <string.h>
+
+#include "framebuffer.h"
+
+
+/* ---------------------------------------- PUBLIC INTERFACES
+*/
+int GUI_Menu(const char *opts[])
+{
+    int x,y;
+    int h;
+    int w;
+    int no;
+    int sel;
+    int f;
+    bool done;
+    bool defer;
+
+    w=0;
+    h=0;
+    sel=0;
+    done=false;
+    defer=false;
+
+    for(no=0;opts[no];no++)
+    {
+    	h+=16;
+
+	if (strlen(opts[no])>w)
+	{
+	    w=strlen(opts[no]);
+	}
+    }
+
+    w=w*8+16;
+
+    x=SCREEN_WIDTH/2-w/2;
+    y=SCREEN_HEIGHT/2-h/2;
+
+    while(!done)
+    {
+	uint32 key=0;
+
+	FB_FillBox(x,y,w,h,FB_RGB(0,0,0));
+	FB_Box(x,y,w,h,FB_RGB(31,31,31));
+	FB_FillBox(x+1,y+sel*16+1,w-2,14,FB_RGB(8,8,31));
+
+    	for(f=0;f<no;f++)
+	{
+	    FB_Centre(opts[f],y+4+f*16,FB_RGB(31,31,31),-1);
+	}
+
+	do
+	{
+	    swiWaitForVBlank();
+	} while(!defer && !(key=keysDownRepeat()));
+
+	if (defer)
+	{
+	    do
+	    {
+	    	swiWaitForVBlank();
+	    } while (keysHeld()&KEY_TOUCH);
+	    done=true;
+	}
+	else
+	{
+	    if (key & (KEY_A|KEY_B|KEY_X|KEY_Y))
+	    {
+		done=true;
+	    }
+	    else if ((key & KEY_UP) && sel)
+	    {
+		sel--;
+	    }
+	    else if ((key & KEY_DOWN) && sel<no-1)
+	    {
+		sel++;
+	    }
+	    else if (key & KEY_TOUCH)
+	    {
+		touchPosition tp=touchReadXY();
+
+		if (tp.px>=x && tp.px<(w+w) && tp.py>=y && tp.py<(y+h))
+		{
+		    defer=true;
+		    sel=(tp.py-y)/16;
+		}
+	    }
+	}
+    }
+
+    return sel;
+}
+