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   _text = text;
  53
  54   // parse it into multiple lines
  55   std::string::size_type p = 0;
  56   while (p != std::string::npos) {
  57     std::string::size_type p2 = s.find('\n', p);
  58     _parsedtext.push_back(s.substr(p, (p2==std::string::npos?p2:p2-p)));
  59     _parsedtext.back().setUtf8(utf);
  60     p = (p2==std::string::npos?p2:p2+1);
  61   }
  62   calcDefaultSizes();
  63 }
  64
  65 void Label::setFont(const Font *f)
  66 {
  67   _font = f;
  68   calcDefaultSizes();
  69 }
  70
  71 void Label::calcDefaultSizes()
  72 {
  73   int longest = 0;
  74   // find the longest line
  75   std::vector<ustring>::iterator it, end = _parsedtext.end();
  76   for (it = _parsedtext.begin(); it != end; ++it) {
  77     int length = _font->measureString(*it);
  78     if (length < 0) continue; // lines too long get skipped
  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   int sidemargin = bevel() * 2;
 105   int y = bevel();
 106   int w = area().width() - borderWidth() * 2 - sidemargin * 2;
 107   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     int length;
 132
 133     do {
 134       t.resize(text_len);
 135       length = _font->measureString(t);
 136     } while (length > w && text_len-- > 0);
 137     if (length < 0) continue; // lines too long get skipped
 138
 139     if (text_len <= 0) continue; // won't fit anything
 140
 141     // justify the text
 142     switch (_justify_horz) {
 143     case RenderStyle::RightBottomJustify:
 144       x += w - length;
 145       break;
 146     case RenderStyle::CenterJustify:
 147       x += (w - length) / 2;
 148       break;
 149     case RenderStyle::LeftTopJustify:
 150       break;
 151     }
 152
 153     control->drawString(surface, *_font, x, y, *_forecolor, t);
 154  }
 155 }
 156
 157 }