Dogcows Code - chaz/openbox/blob - otk/label.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #ifdef HAVE_CONFIG_H
   4 # include "../config.h"
   5 #endif
   6
   7 #include "label.hh"
   8 #include "display.hh"
   9 #include "rendercontrol.hh"
  10
  11 #include <string>
  12
  13 namespace otk {
  14
  15 Label::Label(Widget *parent)
  16   : Widget(parent),
  17     _text(""),
  18     _justify_horz(RenderStyle::LeftTopJustify),
  19     _justify_vert(RenderStyle::LeftTopJustify)
  20 {
  21   styleChanged(*RenderStyle::style(screen()));
  22 }
  23
  24 Label::~Label()
  25 {
  26 }
  27
  28 void Label::setHorizontalJustify(RenderStyle::Justify j)
  29 {
  30   _justify_horz = j;
  31   refresh();
  32 }
  33
  34 void Label::setVerticalJustify(RenderStyle::Justify j)
  35 {
  36   _justify_vert = j;
  37   refresh();
  38 }
  39
  40 void Label::setText(const ustring &text)
  41 {
  42   bool utf = text.utf8();
  43   std::string s = text.c_str(); // use a normal string, for its functionality
  44
  45   _parsedtext.clear();
  46
  47   // parse it into multiple lines
  48   std::string::size_type p = 0;
  49   while (p != std::string::npos) {
  50     std::string::size_type p2 = s.find('\n', p);
  51     _parsedtext.push_back(s.substr(p, (p2==std::string::npos?p2:p2-p)));
  52     _parsedtext.back().setUtf8(utf);
  53     p = (p2==std::string::npos?p2:p2+1);
  54   }
  55   calcDefaultSizes();
  56 }
  57
  58 void Label::setFont(const Font *f)
  59 {
  60   _font = f;
  61   calcDefaultSizes();
  62 }
  63
  64 void Label::calcDefaultSizes()
  65 {
  66   unsigned int longest = 0;
  67   // find the longest line
  68   std::vector<ustring>::iterator it, end = _parsedtext.end();
  69   for (it = _parsedtext.begin(); it != end; ++it) {
  70     unsigned int length = _font->measureString(*it);
  71     if (length > longest) longest = length;
  72   }
  73   setMinSize(Size(longest + borderWidth() * 2 + bevel() * 4,
  74                   _parsedtext.size() * _font->height() + borderWidth() * 2 +
  75                   bevel() * 2));
  76 }
  77
  78 void Label::styleChanged(const RenderStyle &style)
  79 {
  80   _texture = style.labelFocusBackground();
  81   _forecolor = style.textFocusColor();
  82   _font = style.labelFont();
  83   Widget::styleChanged(style);
  84   calcDefaultSizes();
  85 }
  86
  87 void Label::renderForeground(Surface &surface)
  88 {
  89   const RenderControl *control = display->renderControl(screen());
  90   unsigned int sidemargin = bevel() * 2;
  91   int y = bevel();
  92   unsigned int w = area().width() - borderWidth() * 2 - sidemargin * 2;
  93   unsigned int h = area().height() - borderWidth() * 2 - bevel() * 2;
  94
  95   switch (_justify_vert) {
  96   case RenderStyle::RightBottomJustify:
  97     y += h - (_parsedtext.size() * _font->height());
  98     if (y < bevel()) y = bevel();
  99     break;
 100   case RenderStyle::CenterJustify:
 101     y += (h - (_parsedtext.size() * _font->height())) / 2;
 102     if (y < bevel()) y = bevel();
 103     break;
 104   case RenderStyle::LeftTopJustify:
 105     break;
 106   }
 107
 108   if (w <= 0) return; // can't fit anything
 109
 110   std::vector<ustring>::iterator it, end = _parsedtext.end();
 111   for (it = _parsedtext.begin(); it != end; ++it, y += _font->height()) {
 112     ustring t = *it; // the actual text to draw
 113     int x = sidemargin;    // x coord for the text
 114
 115     // find a string that will fit inside the area for text
 116     ustring::size_type text_len = t.size();
 117     unsigned int length;
 118
 119     do {
 120       t.resize(text_len);
 121       length = _font->measureString(t);
 122     } while (length > w && text_len-- > 0);
 123
 124     if (text_len <= 0) continue; // won't fit anything
 125
 126     // justify the text
 127     switch (_justify_horz) {
 128     case RenderStyle::RightBottomJustify:
 129       x += w - length;
 130       break;
 131     case RenderStyle::CenterJustify:
 132       x += (w - length) / 2;
 133       break;
 134     case RenderStyle::LeftTopJustify:
 135       break;
 136     }
 137
 138     control->drawString(surface, *_font, x, y, *_forecolor, t);
 139  }
 140 }
 141
 142 }