Re: Tool tips & win32lib
- Posted by euman at bellsouth.net Mar 28, 2002
- 521 views
whoops again, Left an 'A' out and didnt declare pstr
This part has been tested and seems to work OK on my Win98 SE
integer xGetTextExtentPoint32
xGetTextExtentPoint32 = define_c_proc(gdi32, "GetTextExtentPoint32A",{C_LONG,
C_POINTER, C_INT, C_POINTER})
atom tagSize
tagSize = allocate(8)
sequence str
str = " --type your text here "
integer str_len
atom pstr
str_len = length(str)
pstr = allocate_string(str)
atom hdc
hdc = GetDC(hwnd)
c_proc(xGetTextExtentPoint32,{hdc, pstr, str_len, tagSize})
ReleaseDC(hwnd, hdc)
integer str_width
str_width = peek4u(tagSize + 4)
-- str = " --type your text here " was returned as str_width = 86 on my box
-- You do the math on this! you could even get real fancy and have euphoria
-- look for a '32' whitespace closes to your estimated largest width and
-- set the width there but this is up to you.
integer tip_width
if str_width > 50 and str_width < 100 then
tip_width = 100
end if
Euman
euman at bellsouth.net
