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(svn r15832) -Codechange: improve the aligning of right aligned/centered strings

release/1.0
rubidium 2009-03-23 14:10:54 +00:00
parent abff5eacbc
commit c9e2e22bc0
1 changed files with 12 additions and 4 deletions
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16
src/gfx.cpp
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@ -399,18 +399,26 @@ static int DrawString(int left, int right, int top, char *str, const char *last,
int w = GetStringBoundingBox(str).width; int w = GetStringBoundingBox(str).width;
/* right is the right most position to draw on. In this case we want to do
* calculations with the width of the string. In comparison right can be
* seen as lastof(todraw) and width as lengthof(todraw). They differ by 1.
* So most +1/-1 additions are to move from lengthof to 'indices'.
*/
switch (align) { switch (align) {
case SA_LEFT: case SA_LEFT:
right = left + w; /* right + 1 = left + w */
right = left + w - 1;
break; break;
case SA_CENTER: case SA_CENTER:
left += (right - left - w + 1) / 2; /* The second + 1 is to round to the closest number */
right = left + w; left = (right + 1 + left - w + 1) / 2;
/* right + 1 = left + w */
right = left + w - 1;
break; break;
case SA_RIGHT: case SA_RIGHT:
left = right - w; left = right + 1 - w;
break; break;
default: default: