[Lcd4linux-devel] bold escape char

[Andrew T. <an...@fu...>]

Hi,


I have an application that writes out the lcd data to a file (as
opposed to writing a custom plugin) and I need to make some words
bold. I have hacked this up locally to make the ascii BEL char as a
bold toggle.

This works quite well for me so I am sharing it. The BEL char may not
be a good choice vs. the proper ANSI escape sequences but is easier to
implement.


--- drv_generic_graphic.c.orig	2011-05-12 10:11:40.000000000 +1200
+++ drv_generic_graphic.c	2011-05-18 10:13:51.000000000 +1200
@@ -233,6 +233,7 @@
 				       const char *style, const char *txt)
 {
     int c, r, x, y, len;
+    int bold;

     /* sanity checks */
     if (layer < 0 || layer >= LAYERS) {
@@ -249,10 +250,17 @@
     c = col;

     /* render text into layout FB */
+    bold = 0;
     while (*txt != '\0') {
 	unsigned char *chr;

-	if (strstr(style, "bold") != NULL) {
+	/* magic char to toggle bold */
+	if (*txt == '\a') {
+		bold ^= 1;
+		txt++;
+		continue;
+	}
+	if (bold || strstr(style, "bold") != NULL) {
 	    chr = Font_6x8_bold[(int) *(unsigned char *) txt];
 	} else {
 	    chr = Font_6x8[(int) *(unsigned char *) txt];



The snippets from my lcd4linux.conf

Layout picoLCDGraphic {
  Row1 {
    Col1 'status1'
  }
  Row2 {
    Col1 'status2'
  }
   ...
}
Widget status1 {
  class 'Text'
  expression file::readline(statfile, currline)
  width 42
  update tick
}
Widget status2 {
  class 'Text'
  expression file::readline(statfile, currline+1)
  width 42
  update tick
}
...