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

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