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     _highlight(false)
  21 {
  22   styleChanged(*RenderStyle::style(screen()));
  23 }
  24
  25 Label::~Label()
  26 {
  27 }
  28
  29 void Label::setHorizontalJustify(RenderStyle::Justify j)
  30 {
  31   _justify_horz = j;
  32   refresh();
  33 }
  34
  35 void Label::setVerticalJustify(RenderStyle::Justify j)
  36 {
  37   _justify_vert = j;
  38   refresh();
  39 }
  40
  41 void Label::setHighlighted(bool h)
  42 {
  43   _highlight = h;
  44   styleChanged(*RenderStyle::style(screen()));
  45   refresh();
  46 }
  47
  48 void Label::setText(const ustring &text)
  49 {
  50   bool utf = text.utf8();
  51   std::string s = text.c_str(); // use a normal string, for its functionality
  52
  53   _parsedtext.clear();
  54
  55   // parse it into multiple lines
  56   std::string::size_type p = 0;
  57   while (p != std::string::npos) {
  58     std::string::size_type p2 = s.find('\n', p);
  59     _parsedtext.push_back(s.substr(p, (p2==std::string::npos?p2:p2-p)));
  60     _parsedtext.back().setUtf8(utf);
  61     p = (p2==std::string::npos?p2:p2+1);
  62   }
  63   calcDefaultSizes();
  64 }
  65
  66 void Label::setFont(const Font *f)
  67 {
  68   _font = f;
  69   calcDefaultSizes();
  70 }
  71
  72 void Label::calcDefaultSizes()
  73 {
  74   unsigned int longest = 0;
  75   // find the longest line
  76   std::vector<ustring>::iterator it, end = _parsedtext.end();
  77   for (it = _parsedtext.begin(); it != end; ++it) {
  78     unsigned int length = _font->measureString(*it);
  79     if (length > longest) longest = length;
  80   }
  81   setMinSize(Size(longest + borderWidth() * 2 + bevel() * 4,
  82                   _parsedtext.size() * _font->height() + borderWidth() * 2 +
  83                   bevel() * 2));
  84 }
  85
  86 void Label::styleChanged(const RenderStyle &style)
  87 {
  88   if (_highlight) {
  89     _texture = style.labelFocusBackground();
  90     _forecolor = style.textFocusColor();
  91   } else {
  92     _texture = style.labelUnfocusBackground();
  93     _forecolor = style.textUnfocusColor();
  94   }
  95   if (_font != style.labelFont()) {
  96     _font = style.labelFont();
  97     calcDefaultSizes();
  98   }
  99 }
 100
 101 void Label::renderForeground(Surface &surface)
 102 {
 103   const RenderControl *control = display->renderControl(screen());
 104   unsigned int sidemargin = bevel() * 2;
 105   int y = bevel();
 106   unsigned int w = area().width() - borderWidth() * 2 - sidemargin * 2;
 107   unsigned int h = area().height() - borderWidth() * 2 - bevel() * 2;
 108
 109   switch (_justify_vert) {
 110   case RenderStyle::RightBottomJustify:
 111     y += h - (_parsedtext.size() * _font->height());
 112     if (y < bevel()) y = bevel();
 113     break;
 114   case RenderStyle::CenterJustify:
 115     y += (h - (_parsedtext.size() * _font->height())) / 2;
 116     if (y < bevel()) y = bevel();
 117     break;
 118   case RenderStyle::LeftTopJustify:
 119     break;
 120   }
 121
 122   if (w <= 0) return; // can't fit anything
 123
 124   std::vector<ustring>::iterator it, end = _parsedtext.end();
 125   for (it = _parsedtext.begin(); it != end; ++it, y += _font->height()) {
 126     ustring t = *it; // the actual text to draw
 127     int x = sidemargin;    // x coord for the text
 128
 129     // find a string that will fit inside the area for text
 130     ustring::size_type text_len = t.size();
 131     unsigned int length;
 132
 133     do {
 134       t.resize(text_len);
 135       length = _font->measureString(t);
 136     } while (length > w && text_len-- > 0);
 137
 138     if (text_len <= 0) continue; // won't fit anything
 139
 140     // justify the text
 141     switch (_justify_horz) {
 142     case RenderStyle::RightBottomJustify:
 143       x += w - length;
 144       break;
 145     case RenderStyle::CenterJustify:
 146       x += (w - length) / 2;
 147       break;
 148     case RenderStyle::LeftTopJustify:
 149       break;
 150     }
 151
 152     control->drawString(surface, *_font, x, y, *_forecolor, t);
 153  }
 154 }
 155
 156 }