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/ IRIX Base Documentation 2001 May / SGI IRIX Base Documentation 2001 May.iso / usr / share / catman / u_man / cat3 / Tk / getpixels.z / getpixels
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Text File  |  1998-10-30  |  4.1 KB  |  133 lines
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  4. TTTTkkkk____GGGGeeeettttPPPPiiiixxxxeeeellllssss((((3333TTTTkkkk))))                                            TTTTkkkk____GGGGeeeettttPPPPiiiixxxxeeeellllssss((((3333TTTTkkkk))))
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  8. NNNNAAAAMMMMEEEE
  9.      Tk_GetPixels, Tk_GetScreenMM - translate between strings and screen units
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  11. SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
  12.      ####iiiinnnncccclllluuuuddddeeee <<<<ttttkkkk....hhhh>>>>
  13.  
  14.      int
  15.      TTTTkkkk____GGGGeeeettttPPPPiiiixxxxeeeellllssss((((_i_n_t_e_r_p, _t_k_w_i_n, _s_t_r_i_n_g, _i_n_t_P_t_r))))
  16.  
  17.      int
  18.      TTTTkkkk____GGGGeeeettttSSSSccccrrrreeeeeeeennnnMMMMMMMM((((_i_n_t_e_r_p, _t_k_w_i_n, _s_t_r_i_n_g, _d_o_u_b_l_e_P_t_r))))
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  20. AAAARRRRGGGGUUUUMMMMEEEENNNNTTTTSSSS
  21.      Tcl_Interp   *_i_n_t_e_r_p    (in)      Interpreter to use for error reporting.
  22.  
  23.      Tk_Window    _t_k_w_i_n      (in)      Window whose screen geometry determines
  24.                                        the conversion between absolute units
  25.                                        and pixels.
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  27.      char         *_s_t_r_i_n_g    (in)      String that specifies a distance on the
  28.                                        screen.
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  30.      int          *_i_n_t_P_t_r    (out)     Pointer to location in which to store
  31.                                        converted distance in pixels.
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  33.      double       *_d_o_u_b_l_e_P_t_r (out)     Pointer to location in which to store
  34.                                        converted distance in millimeters.
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  37. DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
  38.      These two procedures take as argument a specification of distance on the
  39.      screen (_s_t_r_i_n_g) and compute the corresponding distance either in integer
  40.      pixels or floating-point millimeters.  In either case, _s_t_r_i_n_g specifies a
  41.      screen distance as a floating-point number followed by one of the
  42.      following characters that indicates units:
  43.  
  44.      <none>
  45.           The number specifies a distance in pixels.
  46.  
  47.      cccc    The number specifies a distance in centimeters on the screen.
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  49.      iiii    The number specifies a distance in inches on the screen.
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  51.      mmmm    The number specifies a distance in millimeters on the screen.
  52.  
  53.      pppp    The number specifies a distance in printer's points (1/72 inch) on
  54.           the screen.
  55.  
  56.      TTTTkkkk____GGGGeeeettttPPPPiiiixxxxeeeellllssss converts _s_t_r_i_n_g to the nearest even number of pixels and
  57.      stores that value at *_i_n_t_P_t_r.  TTTTkkkk____GGGGeeeettttSSSSccccrrrreeeeeeeennnnMMMMMMMM converts _s_t_r_i_n_g to
  58.      millimeters and stores the double-precision floating-point result at
  59.      *_d_o_u_b_l_e_P_t_r.
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  63.                                                                         PPPPaaaaggggeeee 1111
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  70. TTTTkkkk____GGGGeeeettttPPPPiiiixxxxeeeellllssss((((3333TTTTkkkk))))                                            TTTTkkkk____GGGGeeeettttPPPPiiiixxxxeeeellllssss((((3333TTTTkkkk))))
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  74.      Both procedures return TTTTCCCCLLLL____OOOOKKKK under normal circumstances.  If an error
  75.      occurs (e.g. _s_t_r_i_n_g contains a number followed by a character that isn't
  76.      one of the ones above) then TTTTCCCCLLLL____EEEERRRRRRRROOOORRRR is returned and an error message is
  77.      left in _i_n_t_e_r_p->_r_e_s_u_l_t.
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  80. KKKKEEEEYYYYWWWWOOOORRRRDDDDSSSS
  81.      centimeters, convert, inches, millimeters, pixels, points, screen units
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  129.                                                                         PPPPaaaaggggeeee 2222
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