(C++) WtGroupWidget

 

 

WtGroupWidget is a Wt widget class to display an GroupWidget.

Technical facts

 

 

 

 

 

 

./CppWtGroupWidget/CppWtGroupWidget.pri

 

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INCLUDEPATH += \     ../../Classes/CppWtGroupWidget SOURCES += \     ../../Classes/CppWtGroupWidget/wtgroupwidget.cpp HEADERS  += \     ../../Classes/CppWtGroupWidget/wtgroupwidget.h OTHER_FILES += \     ../../Classes/CppWtGroupWidget/Licence.txt

 

 

 

 

 

./CppWtGroupWidget/wtgroupwidget.h

 

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//--------------------------------------------------------------------------- /* WtGroupWidget, Wt widget for displaying groups Copyright 2011-2015 Richel Bilderbeek This program 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. This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */ //--------------------------------------------------------------------------- //From http://www.richelbilderbeek.nl/CppWtGroupWidget.htm //--------------------------------------------------------------------------- #ifndef WTGROUPWIDGET_H #define WTGROUPWIDGET_H #include <string> #include <vector> #include <Wt/WPaintDevice> #include <Wt/WPaintedWidget> namespace ribi { ///WtGroupWidget displays a collection of ID's struct WtGroupWidget : public Wt::WPaintedWidget {   WtGroupWidget();   void SetIds(const std::vector<std::vector<int> >& v);   static std::string GetVersion();   static std::vector<std::string> GetVersionHistory();   protected:   void paintEvent(Wt::WPaintDevice *paintDevice);   private:   void DoRepaint();   std::vector<std::vector<int> > m_v;   static int GetMax(const std::vector<std::vector<int> >& v); }; } //~namespace ribi #endif // WTGROUPWIDGET_H

 

 

 

 

 

./CppWtGroupWidget/wtgroupwidget.cpp

 

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//--------------------------------------------------------------------------- /* WtGroupWidget, Wt widget for displaying groups Copyright 2011-2015 Richel Bilderbeek This program 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. This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */ //--------------------------------------------------------------------------- //From http://www.richelbilderbeek.nl/CppWtGroupWidget.htm //--------------------------------------------------------------------------- #include <algorithm> #include <iostream> #include <numeric> #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Weffc++" #pragma GCC diagnostic ignored "-Wunused-but-set-parameter" #pragma GCC diagnostic ignored "-Wunused-local-typedefs" //#include <boost/numeric/conversion/bounds.hpp> //#include <boost/bind.hpp> //#include <boost/lambda/bind.hpp> #include <boost/numeric/conversion/cast.hpp> #include <boost/math/constants/constants.hpp> #include <Wt/WBrush> #include <Wt/WEvent> #include <Wt/WPaintDevice> #include <Wt/WPainter> #include <Wt/WPen> #include "rainbow.h" #include "wtgroupwidget.h" #pragma GCC diagnostic pop ribi::WtGroupWidget::WtGroupWidget()   : m_v{} {   this->resize(100,100); } void ribi::WtGroupWidget::DoRepaint() {   this->update(); } int ribi::WtGroupWidget::GetMax(const std::vector<std::vector<int> >& v) {   assert(!v.empty());   int max = 0;   for(const auto w:v)   {     if (w.empty()) continue;     const int x = *std::max_element(w.begin(),w.end());     if (x > max) max = x;   }   return max; } std::string ribi::WtGroupWidget::GetVersion() {   return "1.2"; } std::vector<std::string> ribi::WtGroupWidget::GetVersionHistory() {   return {     "2011-06-12: version 1.0: initial version",     "2011-06-16: version 1.1: allow display of empty groups",     "2011-06-22: version 1.2: allow display of zero groups",   }; } void ribi::WtGroupWidget::paintEvent(Wt::WPaintDevice *paintDevice) {   Wt::WPainter p(paintDevice);   const int width  = this->width().toPixels();   const int height = this->height().toPixels();   //Draw a background rectangle   {     Wt::WPen pen = p.pen();     pen.setColor(Wt::WColor(1,1,1));     p.setPen(pen);     p.setBrush(Wt::WBrush(Wt::WColor(254,254,254)));     p.drawRect(0.0,0.0,width,height);   }   if (m_v.empty()) return;   const double mid_x = 0.5 * boost::numeric_cast<double>(width);   const double mid_y = 0.5 * boost::numeric_cast<double>(height);   const double ray_center = std::min(mid_x,mid_y);   const double ray_group  = 0.33 * ray_center;   const double ray_member = 0.33 * ray_group;   const int n_groups = boost::numeric_cast<double>(m_v.size());   const int max_id = GetMax(m_v);   for (int group=0; group!=n_groups; ++group)   {     //Draw the larger (group) circles first     //Set the pen to black     {       Wt::WPen pen = p.pen();       pen.setColor(Wt::WColor(1,1,1));       p.setPen(pen);     }     const double f_group      = (n_groups != 0      ? static_cast<double>(group) / static_cast<double>(n_groups)      : 1.0);     //Set the brush to the group's index     {       double r,g,b;       Rainbow::GetRgb(f_group,r,g,b);       p.setBrush(Wt::WBrush(Wt::WColor(r*255.0,g*255.0,b*255.0)));     }     const double angle = 2.0 * boost::math::constants::pi<double>() * f_group;     const double group_mid_x = mid_x + (std::sin(angle) * 0.66 * ray_center);     const double group_mid_y = mid_y - (std::cos(angle) * 0.66 * ray_center);     //Draw the group ellipse     p.drawEllipse(       group_mid_x - ray_group,       group_mid_y - ray_group,       2.0 * ray_group,       2.0 * ray_group);     const std::vector<int>& members = m_v[group];     const int n_members = boost::numeric_cast<int>(members.size());     for (int member=0; member!=n_members;++member)     {       //Set the brush to the members's index       {         const double f_id           = (max_id != 0.0           ? boost::numeric_cast<double>(members[member])             / boost::numeric_cast<double>(max_id)           : 1.0);         double r,g,b;         Rainbow::GetRgb(f_id,r,g,b);         p.setBrush(Wt::WBrush(Wt::WColor(r*255.0,g*255.0,b*255.0)));       }       const double f_member        = (n_members != 0        ? static_cast<double>(member) / static_cast<double>(n_members)        :  1.0);       const double angle = 2.0 * boost::math::constants::pi<double>() * f_member;       const double member_mid_x = group_mid_x + (std::sin(angle) * 0.66 * ray_group);       const double member_mid_y = group_mid_y - (std::cos(angle) * 0.66 * ray_group);       //Draw the member his/her ellipse       p.drawEllipse(         member_mid_x - ray_member,         member_mid_y - ray_member,         2.0 * ray_member,         2.0 * ray_member);     }   } } void ribi::WtGroupWidget::SetIds(const std::vector<std::vector<int> >& v) {   m_v = v;   update(); }