Diff: u8g_cursor.c

Revision:

0:972874f31c98

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/u8g_cursor.c	Wed Mar 07 12:49:14 2018 +0000
@@ -0,0 +1,100 @@
+/*
+
+  u8g_cursor.c
+
+  Universal 8bit Graphics Library
+  
+  Copyright (c) 2011, olikraus@gmail.com
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without modification, 
+  are permitted provided that the following conditions are met:
+
+  * Redistributions of source code must retain the above copyright notice, this list 
+    of conditions and the following disclaimer.
+    
+  * Redistributions in binary form must reproduce the above copyright notice, this 
+    list of conditions and the following disclaimer in the documentation and/or other 
+    materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
+  CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, 
+  INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 
+  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
+  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 
+  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 
+  STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
+  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
+  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
+  
+  
+*/
+
+#include "u8g.h"
+
+void u8g_SetCursorFont(u8g_t *u8g, const u8g_pgm_uint8_t *cursor_font)
+{
+  u8g->cursor_font = cursor_font;
+}
+
+void u8g_SetCursorStyle(u8g_t *u8g, uint8_t encoding)
+{
+  u8g->cursor_encoding = encoding;
+}
+
+void u8g_SetCursorColor(u8g_t *u8g, uint8_t fg, uint8_t bg)
+{
+  u8g->cursor_bg_color = bg;
+  u8g->cursor_fg_color = fg;
+}
+
+void u8g_SetCursorPos(u8g_t *u8g, u8g_uint_t cursor_x, u8g_uint_t cursor_y)
+{
+  u8g->cursor_x = cursor_x;
+  u8g->cursor_y = cursor_y;
+}
+
+void u8g_EnableCursor(u8g_t *u8g)
+{
+    u8g->cursor_fn = u8g_DrawCursor;
+}
+
+void u8g_DisableCursor(u8g_t *u8g)
+{
+    u8g->cursor_fn = (u8g_draw_cursor_fn)0;
+}
+
+void u8g_DrawCursor(u8g_t *u8g)
+{
+  const u8g_pgm_uint8_t *font;
+  uint8_t color;
+  uint8_t encoding = u8g->cursor_encoding;
+  
+  /* get current values */
+  color = u8g_GetColorIndex(u8g);
+  font = u8g->font;
+  
+  /* draw cursor */
+  u8g->font = u8g->cursor_font;  
+  encoding++;
+  u8g_SetColorIndex(u8g, u8g->cursor_bg_color); 
+  /* 27. Jan 2013: replaced call to u8g_DrawGlyph with call to u8g_draw_glyph */
+  /* required, because y adjustment should not happen to the cursor fonts */
+  u8g_draw_glyph(u8g, u8g->cursor_x, u8g->cursor_y, encoding);
+  encoding--;
+  u8g_SetColorIndex(u8g, u8g->cursor_fg_color); 
+  /* 27. Jan 2013: replaced call to u8g_DrawGlyph with call to u8g_draw_glyph */
+  /* required, because y adjustment should not happen to the cursor fonts */
+  /* u8g_DrawGlyph(u8g, u8g->cursor_x, u8g->cursor_y, encoding); */
+  u8g_draw_glyph(u8g, u8g->cursor_x, u8g->cursor_y, encoding);
+  
+  /* restore previous values */
+  u8g->font = font;
+  u8g_SetColorIndex(u8g, color); 
+}
+
+