57 lines
1.8 KiB
Scheme
57 lines
1.8 KiB
Scheme
;; Copyright (c) 2001-2003 by David Frese, Norbert Freudemann
|
|
|
|
;; *** draw image text ***********************************************
|
|
|
|
(import-xlib-function draw-image-string (display drawable gc x y string)
|
|
"scx_Draw_Image_String")
|
|
|
|
;; string has to be a list of (byte1 . byte2) pairs, where byte1 and
|
|
;; byte2 are characters
|
|
(import-xlib-function draw-image-string-16
|
|
(display drawable gc x y string)
|
|
"scx_Draw_Image_String_16")
|
|
|
|
;; *** draw polytext text ********************************************
|
|
|
|
(define-record-type text-item :text-item
|
|
(make-text-item string delta font)
|
|
text-item?
|
|
(string text-item:string)
|
|
(delta text-item:delta)
|
|
(font text-item:font))
|
|
|
|
(define-exported-binding "scx-text-item" :text-item)
|
|
|
|
(define-syntax make-text-items
|
|
(syntax-rules
|
|
(change-font with-delta)
|
|
((make-text-items (change-font font) rest ...)
|
|
(cons (make-text-item #f 0 font)
|
|
(make-text-items rest ...)))
|
|
((make-text-items (with-delta d text) rest ...)
|
|
(cons (make-text-item text d none)
|
|
(make-text-items rest ...)))
|
|
((make-text-items text rest ...)
|
|
(cons (make-text-item text 0 none)
|
|
(make-text-items rest ...)))
|
|
((make-text-items)
|
|
'())))
|
|
|
|
(import-xlib-function draw-text (display drawable gc x y items)
|
|
"scx_Draw_Text")
|
|
|
|
(import-xlib-function draw-text-16 (display drawable gc x y items)
|
|
"scx_Draw_Text_16")
|
|
|
|
;; *** compute or query text extents *********************************
|
|
|
|
;; returns a char-struct record (the direction, font-ascent and
|
|
;; font-descent can be obtained from the font-struct directly)
|
|
(import-lambda-definition text-extents (font-struct string)
|
|
"scx_Text_Extents")
|
|
|
|
;; string has to be a list of (byte1 . byte2) pairs, where byte1 and
|
|
;; byte2 are characters
|
|
(import-lambda-definition text-extents-16 (font-struct string)
|
|
"scx_Text_Extents_16")
|