ctrl/label.cc

   1 // This file is part of the utui library, a terminal UI framework.
   2 //
   3 // Copyright (C) 2006 by Mike Sharov <msharov@users.sourceforge.net>
   4 // This file is free software, distributed under the MIT License.
   5 //
   6 // label.cc
   7 //
   8
   9 #include "label.h"
  10
  11 /// Default constructor.
  12 CLabel::CLabel (rctext_t s)
  13 : CWindow (),
  14   m_Text (s)
  15 {
  16     SetFlag (f_NoTabOrder);
  17 }
  18
  19 /// Autogen factory for dialog descriptions.
  20 /*static*/ pwidget_t CLabel::Factory (widival_t v)
  21 {
  22     return (new CLabel (v.text));
  23 }
  24
  25 /// Draws the label in the window.
  26 void CLabel::OnDraw (CGC& gc)
  27 {
  28     static const EColor colors[3] = { black, cyan, red };
  29     gc.Color (colors[0], colors[1]);
  30     CWindow::OnDraw (gc);
  31     string line;
  32     coord_t y = 0;
  33     for (uoff_t i = 0; i < Text().size(); i += line.size() + 1) {
  34         line.link (Text().iat(i), Text().iat (Text().find ('\n', i)));
  35         DrawTextWithAccel (gc, 0, y++, line, colors);
  36     }
  37 }
  38
  39 /// Returns the recommended size for the window.
  40 void CLabel::SizeHints (rrect_t lr) const
  41 {
  42     Point2d lrbr (lr[1]);
  43     string line;
  44     lr[1] = lr[0];
  45     for (uoff_t i = 0; i < Text().size(); i += line.size() + 1) {
  46         line.link (Text().iat(i), Text().iat (Text().find ('\n', i)));
  47         ++ lr[1][1];
  48         lr[1][0] = max (lr[1][0], lr[0][0] + coord_t(TextWithAccelSize(line)));
  49     }
  50     simd::pmin (lrbr, lr[1]);
  51 }
  52
  53 /// Draws text \p s with & accelerators in different color.
  54 coord_t CLabel::DrawTextWithAccel (CGC& gc, coord_t x, coord_t y, rctext_t s, ptextcols_t col) const
  55 {
  56     for (string::utf8_iterator ic = s.utf8_begin(); ic < s.utf8_end(); ++ic) {
  57         gc.Char (x, y, *ic);
  58         const bool bAccel (*ic == '&');
  59         x += !bAccel;
  60         gc.FgColor (col[bAccel * 2]);
  61     }
  62     return (x);
  63 }
  64
  65 /// Returns the size of the label text after contracting & accelerators.
  66 size_t CLabel::TextWithAccelSize (rctext_t s) const
  67 {
  68     return (s.length() - count(s, '&'));
  69 }
  70
  71 /// \brief Returns the accelerator key for this item.
  72 /// Searches for an & followed by a character, and decode it as utf8.
  73 wchar_t CLabel::FocusAccelKey (void) const
  74 {
  75     uoff_t ia = Text().find ('&');
  76     return (ia < Text().size() ? tolower(*utf8in(Text().iat(ia+1))) : 0);
  77 }
  78