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apps/examples/pdcurses: Clean up charset example so that the display geomtry is better on very wide displays (wide with respect to the width of a character).

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This commit is contained in:
Gregory Nutt 2017-11-30 12:04:38 -06:00
parent 46c10c46f7
commit 2e4aa6a557
1 changed files with 16 additions and 2 deletions
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18
examples/pdcurses/charset_main.c
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@ -96,6 +96,7 @@ int charset_main(int argc, char *argv[])
}
/* Set up geometry */
/* First get the maximum width */
width = COLS - 2;
if (width > NUM_CH)
@ -103,7 +104,7 @@ int charset_main(int argc, char *argv[])
width = NUM_CH;
}
xoffset = (COLS - width) / 2;
/* Get the height associated with the maximum width */
height = (NUM_CH + width - 1) / width;
lastch = LAST_CH;
@ -114,9 +115,22 @@ int charset_main(int argc, char *argv[])
lastch = FIRST_CH + width * height - 1;
}
/* Reduce the width if it will give us a more balanced layout */
while (height < (LINES / 2) && width > (COLS / 2))
{
int numch = lastch - FIRST_CH + 1;
width >>= 1;
height = (numch + width - 1) / width;
}
/* Center the rectangle containing the font set */
xoffset = (COLS - width) / 2;
yoffset = (LINES - height) / 2;
/* Now display the character set */
/* Now display the character set using that geometry */
ch = FIRST_CH;
for (row = yoffset; row < yoffset + height; row++)