(C++) QtShapeWidget

 

 

QtShapeWidget is a Qt widget class to display an ShapeWidget.

Technical facts

 

 

 

 

 

 

./CppQtShapeWidget/CppQtShapeWidget.pri

 

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INCLUDEPATH += \     ../../Classes/CppQtShapeWidget SOURCES += \     ../../Classes/CppQtShapeWidget/qtshapewidget.cpp HEADERS  += \     ../../Classes/CppQtShapeWidget/qtshapewidget.h OTHER_FILES += \     ../../Classes/CppQtShapeWidget/Licence.txt

 

 

 

 

 

./CppQtShapeWidget/qtshapewidget.h

 

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//--------------------------------------------------------------------------- /* QtShapeWidget, Qt class for displaying a ShapeWidget 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/CppQtShapeWidget.htm //--------------------------------------------------------------------------- #ifndef QTSHAPEWIDGET_H #define QTSHAPEWIDGET_H #include <string> #include <vector> #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Weffc++" #pragma GCC diagnostic ignored "-Wunused-local-typedefs" #include <boost/scoped_ptr.hpp> #include <boost/signals2.hpp> #include <QWidget> #include "shape.h" //For MOC #include "shapewidget.h" //For MOC #pragma GCC diagnostic pop namespace ribi { ///QtShapeWidget manages and displays a Shape class QtShapeWidget : public QWidget {   Q_OBJECT public:   explicit QtShapeWidget(QWidget *parent = 0);   QtShapeWidget(boost::shared_ptr<ShapeWidget> widget,     QWidget *parent = 0);   void paintEvent(QPaintEvent *);   mutable boost::signals2::signal<void ()> m_signal_position_changed;   ///Draw a shape from a Shape   static void DrawShape(     QPainter& painter,     const int left, const int top,     const int width, const int height,     const Shape * const shape);   ///Draw a shape from a ShapeWidget   static void DrawShape(     QPainter& painter,     const ShapeWidget * const widget);         ShapeWidget * GetWidget() const { return m_widget.get(); }   const ShapeWidget * GetWidget()       { return m_widget.get(); } private:   boost::shared_ptr<ShapeWidget> m_widget; public:   static std::string GetVersion() noexcept;   static std::vector<std::string> GetVersionHistory() noexcept; }; } //~namespace ribi #endif // QTSHAPEWIDGET_H

 

 

 

 

 

./CppQtShapeWidget/qtshapewidget.cpp

 

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//--------------------------------------------------------------------------- /* QtShapeWidget, Qt class for displaying a ShapeWidget 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/CppQtShapeWidget.htm //--------------------------------------------------------------------------- #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Weffc++" #pragma GCC diagnostic ignored "-Wunused-local-typedefs" #include "qtshapewidget.h" #include <cassert> #include <cmath> #include <boost/math/constants/constants.hpp> #include <boost/numeric/conversion/cast.hpp> #include <QMouseEvent> #include <QPainter> #include <QPolygon> #include "shape.h" #include "trace.h" #pragma GCC diagnostic pop ribi::QtShapeWidget::QtShapeWidget(QWidget *parent)   : QWidget(parent),     m_signal_position_changed{},     m_widget(new ShapeWidget(0,0.0)) {   //m_widget->m_signal_position_changed.connect(   //  boost::bind(   //    &ribi::QtShapeWidget::repaint,   //    this)); } ribi::QtShapeWidget::QtShapeWidget(   boost::shared_ptr<ShapeWidget> widget,   QWidget *parent)   : QWidget(parent),     m_signal_position_changed{},     m_widget(widget) {   //m_widget->m_signal_position_changed.connect(   //  boost::bind(   //    &ribi::QtShapeWidget::repaint,   //    this)); } void ribi::QtShapeWidget::DrawShape(   QPainter& painter,   const ShapeWidget * const widget) {   DrawShape(     painter,     widget->GetLeft(),     widget->GetTop(),     widget->GetWidth(),     widget->GetHeight(),     widget->GetShape()   ); } void ribi::QtShapeWidget::DrawShape(   QPainter& painter,   const int left, const int top,   const int width, const int height,   const Shape * const shape ) {   const double pi = boost::math::constants::pi<double>();   const unsigned char red = shape->GetRed();   const unsigned char green = shape->GetGreen();   const unsigned char blue = shape->GetBlue();   painter.setBrush(QColor(red,green,blue));   const int n_corners = shape->GetNumberOfCorners();   if (n_corners == 0)   {     //Draw a circle     painter.drawEllipse(left,top,width-1,height-1);     return;   }   const double rotation = shape->GetRotation();   const double midx = boost::numeric_cast<double>(width) / 2.0;   const double midy = boost::numeric_cast<double>(height) / 2.0;   if (n_corners == 1)   {     //Draw a line     const int x1 = boost::numeric_cast<int>(       midx - (std::cos(rotation) * midx));     const int y1 = boost::numeric_cast<int>(       midy + (std::sin(rotation) * midy));     const int x2 = boost::numeric_cast<int>(       midx - (std::cos(rotation + pi) * midx));     const int y2 = boost::numeric_cast<int>(       midy + (std::sin(rotation + pi) * midy));     painter.drawLine(x1,y1,x2,y2);     return;   }   const double d_angle = 2.0 * pi / boost::numeric_cast<double>(n_corners);   QPolygon polygon;   for (int i=0; i!=n_corners; ++i)   {     const double angle       = rotation + (boost::numeric_cast<double>(i) * d_angle);     const int x = boost::numeric_cast<int>(       midx - (std::cos(angle) * midx));     const int y = boost::numeric_cast<int>(       midy + (std::sin(angle) * midy));     polygon.append(QPoint(x,y));   }   painter.drawConvexPolygon(polygon); } std::string ribi::QtShapeWidget::GetVersion() noexcept {   return "2.1"; } std::vector<std::string> ribi::QtShapeWidget::GetVersionHistory() noexcept {   return {     "2011-07-13: Version 1.0: initial version",     "2011-08-08: Version 2.0: conformized architecture to MysteryMachineWidget",     "2014-03-28: Version 2.1: replaced custom Rect class by Boost.Geometry"   }; } void ribi::QtShapeWidget::paintEvent(QPaintEvent *) {   QPainter painter(this);   DrawShape(     painter,     0,0,width(),height(),     this->m_widget->GetShape()   ); }