1  // Copyright (c) 2015-present The Bitcoin Core developers
  2  // Distributed under the MIT software license, see the accompanying
  3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  4  
  5  #include <qt/platformstyle.h>
  6  
  7  #include <QApplication>
  8  #include <QColor>
  9  #include <QImage>
 10  #include <QPalette>
 11  
 12  static const struct {
 13      const char *platformId;
 14      /** Show images on push buttons */
 15      const bool imagesOnButtons;
 16      /** Colorize single-color icons */
 17      const bool colorizeIcons;
 18      /** Extra padding/spacing in transactionview */
 19      const bool useExtraSpacing;
 20  } platform_styles[] = {
 21      {"macosx", false, true, true},
 22      {"windows", true, false, false},
 23      /* Other: linux, unix, ... */
 24      {"other", true, true, false}
 25  };
 26  
 27  namespace {
 28  /* Local functions for colorizing single-color images */
 29  
 30  void MakeSingleColorImage(QImage& img, const QColor& colorbase)
 31  {
 32      img = img.convertToFormat(QImage::Format_ARGB32);
 33      for (int x = img.width(); x--; )
 34      {
 35          for (int y = img.height(); y--; )
 36          {
 37              const QRgb rgb = img.pixel(x, y);
 38              img.setPixel(x, y, qRgba(colorbase.red(), colorbase.green(), colorbase.blue(), qAlpha(rgb)));
 39          }
 40      }
 41  }
 42  
 43  QIcon ColorizeIcon(const QIcon& ico, const QColor& colorbase)
 44  {
 45      QIcon new_ico;
 46      for (const QSize& sz : ico.availableSizes())
 47      {
 48          QImage img(ico.pixmap(sz).toImage());
 49          MakeSingleColorImage(img, colorbase);
 50          new_ico.addPixmap(QPixmap::fromImage(img));
 51      }
 52      return new_ico;
 53  }
 54  
 55  QImage ColorizeImage(const QString& filename, const QColor& colorbase)
 56  {
 57      QImage img(filename);
 58      MakeSingleColorImage(img, colorbase);
 59      return img;
 60  }
 61  
 62  QIcon ColorizeIcon(const QString& filename, const QColor& colorbase)
 63  {
 64      return QIcon(QPixmap::fromImage(ColorizeImage(filename, colorbase)));
 65  }
 66  
 67  }
 68  
 69  
 70  PlatformStyle::PlatformStyle(const QString &_name, bool _imagesOnButtons, bool _colorizeIcons, bool _useExtraSpacing):
 71      name(_name),
 72      imagesOnButtons(_imagesOnButtons),
 73      colorizeIcons(_colorizeIcons),
 74      useExtraSpacing(_useExtraSpacing)
 75  {
 76  }
 77  
 78  QColor PlatformStyle::TextColor() const
 79  {
 80      return QApplication::palette().color(QPalette::WindowText);
 81  }
 82  
 83  QColor PlatformStyle::SingleColor() const
 84  {
 85      if (colorizeIcons) {
 86          QColor colorHighlightBg(QApplication::palette().color(QPalette::Highlight));
 87          QColor colorHighlightFg(QApplication::palette().color(QPalette::HighlightedText));
 88          const QColor colorText(QApplication::palette().color(QPalette::WindowText));
 89          const int colorTextLightness = colorText.lightness();
 90          if (abs(colorHighlightBg.lightness() - colorTextLightness) < abs(colorHighlightFg.lightness() - colorTextLightness)) {
 91              return colorHighlightBg;
 92          }
 93          return colorHighlightFg;
 94      }
 95      return {0, 0, 0};
 96  }
 97  
 98  QImage PlatformStyle::SingleColorImage(const QString& filename) const
 99  {
100      if (!colorizeIcons)
101          return QImage(filename);
102      return ColorizeImage(filename, SingleColor());
103  }
104  
105  QIcon PlatformStyle::SingleColorIcon(const QString& filename) const
106  {
107      if (!colorizeIcons)
108          return QIcon(filename);
109      return ColorizeIcon(filename, SingleColor());
110  }
111  
112  QIcon PlatformStyle::SingleColorIcon(const QIcon& icon) const
113  {
114      if (!colorizeIcons)
115          return icon;
116      return ColorizeIcon(icon, SingleColor());
117  }
118  
119  QIcon PlatformStyle::TextColorIcon(const QIcon& icon) const
120  {
121      return ColorizeIcon(icon, TextColor());
122  }
123  
124  const PlatformStyle *PlatformStyle::instantiate(const QString &platformId)
125  {
126      for (const auto& platform_style : platform_styles) {
127          if (platformId == platform_style.platformId) {
128              return new PlatformStyle(
129                      platform_style.platformId,
130                      platform_style.imagesOnButtons,
131                      platform_style.colorizeIcons,
132                      platform_style.useExtraSpacing);
133          }
134      }
135      return nullptr;
136  }
137