query_fontT_query_fontQueryFontQueryFontquery_font (算子)

名称

query_fontT_query_fontQueryFontQueryFontquery_font — 查询可用字体。

签名

query_font( : : WindowHandle : Font)

描述

query_fontquery_fontQueryFontQueryFontQueryFontquery_font queries the fonts available for text output in the output window. They can be set with the operator set_fontset_fontSetFontSetFontSetFontset_font using the appropriate syntax. Fonts are used by the operators write_stringwrite_stringWriteStringWriteStringWriteStringwrite_string, read_charread_charReadCharReadCharReadCharread_char, read_stringread_stringReadStringReadStringReadStringread_string and new_linenew_lineNewLineNewLineNewLinenew_line。

注意

For different machines the available fonts may differ a lot. Therefore query_fontquery_fontQueryFontQueryFontQueryFontquery_font will return different fonts on different machines.

执行信息

多线程类型：可重入（与非独占算子并行运行）。
多线程作用域：全局（可从任何线程调用）。
未采用并行化处理。

参数

WindowHandleWindowHandleWindowHandleWindowHandlewindowHandlewindow_handle (输入控制) window → (handle)

窗口句柄。

FontFontFontFontfontfont (输出控制) string-array → (string)

Tuple with available font names.

示例（HDevelop）

open_window(0,0,-1,-1,'root','visible','',WindowHandle)
set_check('~text')
query_font(WindowHandle,Fontlist)
set_color(WindowHandle,'white')
for i:=0 to |Fontlist|-1 by 1
  set_display_font (WindowHandle,16,Fontlist[i],'true','false')
  write_string(WindowHandle,Fontlist[i])
  new_line(WindowHandle)
endfor

结果

query_fontquery_fontQueryFontQueryFontQueryFontquery_font 返回 2 ( H_MSG_TRUE )。

可能的前趋

open_windowopen_windowOpenWindowOpenWindowOpenWindowopen_window

可能的后继

set_fontset_fontSetFontSetFontSetFontset_font, write_stringwrite_stringWriteStringWriteStringWriteStringwrite_string, read_stringread_stringReadStringReadStringReadStringread_string, read_charread_charReadCharReadCharReadCharread_char

另见

模块

基础

算子