UIHelpers.hpp

Go to the documentation of this file.

/*
 
  This file is part of OpenFLUID software
  Copyright(c) 2007, INRA - Montpellier SupAgro
 
 
 == GNU General Public License Usage ==
 
  OpenFLUID is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
 
  OpenFLUID is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.
 
  You should have received a copy of the GNU General Public License
  along with OpenFLUID. If not, see <http://www.gnu.org/licenses/>.
 
 
 == Other Usage ==
 
  Other Usage means a use of OpenFLUID that is inconsistent with the GPL
  license, and requires a written agreement between You and INRA.
  Licensees for Other Usage of OpenFLUID may use this file in accordance
  with the terms contained in the written agreement between You and INRA.
  
*/
 
/**
  @file UIHelpers.hpp
 
  @author Jean-Christophe FABRE <jean-christophe.fabre@inra.fr>
*/
 
 
#ifndef __OPENFLUID_UICOMMON_UIHELPERS_HPP__
#define __OPENFLUID_UICOMMON_UIHELPERS_HPP__
 
 
#include <cmath>
#include <random>
 
#include <QColor>
#include <QRegExp>
#include <QLineEdit>
#include <QIcon>
#include <QApplication>
#include <QFile>
 
 
namespace openfluid { namespace ui { namespace common {
 
 
inline QColor getRandomColor()
{
  static std::random_device RD;
  static std::mt19937 G(RD());
  static std::uniform_int_distribution<> Distri255(0, 255);
  
  return QColor(Distri255(G),Distri255(G),Distri255(G));
}
 
 
// =====================================================================
// =====================================================================
 
 
inline double computeLuminance(const QColor& Color)
{
  // Reference: https://www.w3.org/WAI/GL/wiki/Relative_luminance
  auto adjustColor = [](const double ChannelValue)
  {
    double RelValue = ChannelValue/255;
    if (RelValue <= 0.03928)
    {
       return RelValue/12.92;
    }
    else
    {
      // low-gamma adjust coefficient
      return std::pow((RelValue + 0.055) / 1.055, 2.4);
    }
  };
  return adjustColor(Color.red())*0.2126 + adjustColor(Color.green())*0.7152 + adjustColor(Color.blue())*0.0722;
}
 
 
// =====================================================================
// =====================================================================
 
 
inline void fixLineEdit(QLineEdit* LineEdit,QRegExp SearchRegExp = QRegExp("[^\\w]"),QString NewStr = "_")
{
  int CPos = LineEdit->cursorPosition();
  LineEdit->setText(LineEdit->text().replace(SearchRegExp,NewStr));
  LineEdit->setCursorPosition(CPos);
}
 
 
// =====================================================================
// =====================================================================
 
 
inline bool isHiDPIDevice()
{
  return (qApp->devicePixelRatio() >= 2.0);
}
 
 
// =====================================================================
// =====================================================================
 
 
inline QIcon getIcon(const QString& IconName,const QString& ResourcePath,
                     bool IsLight = false,bool AutoHiDPI = true)
{
  QString IconSuffix = "dark";
 
  if (IsLight)
  {
    IconSuffix = "light";
  }
 
  QString TmpPath = QString(":%1/icons/%2_%3.png").arg(ResourcePath).arg(IconName).arg(IconSuffix);
 
  if (AutoHiDPI && isHiDPIDevice())
  {
    QString TmpHiDPIPath = QString(":%1/icons/%2_%3@2x.png").arg(ResourcePath).arg(IconName).arg(IconSuffix);
 
    if (QFile::exists(TmpHiDPIPath))
    {
      TmpPath = TmpHiDPIPath;
    }
  }
 
  QIcon TmpIcon(TmpPath);
 
  if (IsLight)
  {
    QString TmpLightPath = QString(":%1/icons/%2_grayed.png").arg(ResourcePath).arg(IconName);
 
    if (AutoHiDPI && isHiDPIDevice())
    {
      QString TmpLightHiDPIPath = QString(":%1/icons/%2_grayed@2x.png").arg(ResourcePath).arg(IconName);
 
      if (QFile::exists(TmpLightHiDPIPath))
      {
        TmpLightPath = TmpLightHiDPIPath;
      }
    }
    TmpIcon.addPixmap(QPixmap(TmpLightPath),QIcon::Disabled);
  }
 
  return TmpIcon;
}
 
 
// =====================================================================
// =====================================================================
 
 
inline QPixmap getImage(const QString& ImageName,const QString& ResourcePath,bool AutoHiDPI = true)
{
  QString TmpPath = QString(":%1/images/%2.png").arg(ResourcePath).arg(ImageName);
 
  if (AutoHiDPI && isHiDPIDevice())
  {
    QString TmpHiDPIPath = QString(":%1/images/%2@2x.png").arg(ResourcePath).arg(ImageName);
 
    if (QFile::exists(TmpHiDPIPath))
    {
      TmpPath = TmpHiDPIPath;
    }
  }
 
  return QPixmap(TmpPath);
}
 
 
} } }  // namespaces
 
 
#endif /* __OPENFLUID_UICOMMON_UIHELPERS_HPP__ */