(C++) WtDialWidget

 

 

WtDialWidget is a Wt widget class to display an DialWidget.

 

WtDialWidget is used in the tool TestDial.

Technical facts

 

 

 

 

 

 

./CppWtDialWidget/CppWtDialWidget.pri

 

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INCLUDEPATH += \     ../../Classes/CppWtDialWidget SOURCES += \     ../../Classes/CppWtDialWidget/wtdialwidget.cpp HEADERS  += \     ../../Classes/CppWtDialWidget/wtdialwidget.h OTHER_FILES += \     ../../Classes/CppWtDialWidget/Licence.txt

 

 

 

 

 

./CppWtDialWidget/wtdialwidget.h

 

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//--------------------------------------------------------------------------- /* WtDialWidget, Wt widget for displaying the Dial class 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/CppWtDialWidget.htm //--------------------------------------------------------------------------- #ifndef WTDIALWIDGET_H #define WTDIALWIDGET_H #include <string> #include <vector> #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Weffc++" #pragma GCC diagnostic ignored "-Wunused-local-typedefs" #pragma GCC diagnostic ignored "-Wunused-but-set-variable" #include <boost/signals2.hpp> #include <Wt/WPaintDevice> #include <Wt/WPaintedWidget> #pragma GCC diagnostic pop namespace Wt { struct WMouseEventEvent; } namespace ribi { struct Dial; struct DialWidget; ///Wt display widget of a Dial struct WtDialWidget : public Wt::WPaintedWidget {   explicit WtDialWidget(     const double intensity    = 0.0,     const unsigned char red   = 255,     const unsigned char green = 255,     const unsigned char blue  = 255);   const DialWidget * GetWidget() const { return m_widget.get(); }   DialWidget * GetWidget() { return m_widget.get(); }   ///Draw a Dial   static void DrawDial(     Wt::WPainter& painter,     const int left, const int top,     const int width, const int height,     const Dial * const dial);   ///Draw a Dial   static void DrawDial(     Wt::WPainter& painter,     const DialWidget * const widget);   static std::string GetVersion();   static std::vector<std::string> GetVersionHistory();   protected:   void paintEvent(Wt::WPaintDevice *paintDevice);   private:   boost::scoped_ptr<DialWidget> m_widget;   void DoRepaint();   void OnClicked(const Wt::WMouseEvent& e);   ///OnResize is called when the geometry of the widget is changed   void OnResize();   ///Wt resize: hide it from sight   void resize(const Wt::WLength& width, const Wt::WLength& height); }; } //~namespace ribi #endif // WTLEDWIDGET_H

 

 

 

 

 

./CppWtDialWidget/wtdialwidget.cpp

 

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//--------------------------------------------------------------------------- /* WtDialWidget, Wt widget for displaying the Dial class 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/CppWtDialWidget.htm //--------------------------------------------------------------------------- #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Weffc++" #pragma GCC diagnostic ignored "-Wunused-local-typedefs" #pragma GCC diagnostic ignored "-Wunused-but-set-variable" #include "wtdialwidget.h" #include <boost/bind.hpp> #include <boost/numeric/conversion/cast.hpp> #include <Wt/WBrush> #include <Wt/WEvent> #include <Wt/WPainter> #include <Wt/WPen> #include "dial.h" #include "dialwidget.h" #include "geometry.h" #pragma GCC diagnostic pop ribi::WtDialWidget::WtDialWidget(   const double intensity,   const unsigned char red,   const unsigned char green,   const unsigned char blue)   : m_widget(new DialWidget(intensity,red,green,blue)) {   assert(m_widget);   m_widget->GetDial()->m_signal_color_changed.connect(     boost::bind(       &ribi::WtDialWidget::DoRepaint,       this));   m_widget->GetDial()->m_signal_position_changed.connect(     boost::bind(       &ribi::WtDialWidget::DoRepaint,       this));   m_widget->m_signal_geometry_changed.connect(     boost::bind(       &ribi::WtDialWidget::OnResize,       this));   this->clicked().connect(this,&ribi::WtDialWidget::OnClicked);   m_widget->SetGeometry(0,0,32,32); } void ribi::WtDialWidget::DoRepaint() {   this->update(); } void ribi::WtDialWidget::DrawDial(   Wt::WPainter& painter,   const int left, const int top,   const int width, const int height,   const Dial * const dial) {   const double position = dial->GetPosition();   //Draw knob   {     Wt::WPen pen = painter.pen();     pen.setWidth(1);     pen.setColor(Wt::WColor(0,0,0));     painter.setPen(pen);   }   painter.setBrush(Wt::WColor(     dial->GetRed(),     dial->GetGreen(),     dial->GetBlue()));   painter.drawEllipse(left+1,top+1,width-2,height-2);   //Draw pointer   const int midx = width / 2;   const int midy = height / 2;   const double ray = static_cast<double>(std::min( midx, midy ));   const double two_pi = boost::math::constants::two_pi<double>();   const double angle = position * two_pi;   const int pointerX     = static_cast<int>( static_cast<double>(midx) + (std::sin(angle) * ray) );   const int pointerY     = static_cast<int>( static_cast<double>(midy) - (std::cos(angle) * ray) );   {     Wt::WPen pen = painter.pen();     pen.setWidth(4);     painter.setPen(pen);   }   painter.drawLine(left+midx,top+midy,left+pointerX,top+pointerY); } void ribi::WtDialWidget::DrawDial(   Wt::WPainter& painter,   const DialWidget * const widget) {   DrawDial(     painter,     Geometry().GetLeft(widget->GetGeometry()),     Geometry().GetTop(widget->GetGeometry()),     Geometry().GetWidth(widget->GetGeometry()),     Geometry().GetHeight(widget->GetGeometry()),     widget->GetDial()   ); } std::string ribi::WtDialWidget::GetVersion() {   return "3.2"; } std::vector<std::string> ribi::WtDialWidget::GetVersionHistory() {   return {     "2011-04-10: version 1.0: initial version",     "2011-04-11: version 1.1: fixed #include guard, fixed initial date, made default dial white",     "2011-07-03: version 2.0: moved Dial its user interface logic to new class DialWidget",     "2011-08-07: Version 3.0: conformized architure for MysteryMachine",     "2011-08-31: Version 3.1: allow changing the dial its color",     "2014-04-23: Version 3.2: use of Boost.Geometry its rectangle class"   }; } void ribi::WtDialWidget::OnClicked(const Wt::WMouseEvent& e) {   m_widget->Click(e.widget().x,e.widget().y); } void ribi::WtDialWidget::OnResize() {   resize(     Geometry().GetWidth(m_widget->GetGeometry()),     Geometry().GetHeight(m_widget->GetGeometry())   ); } void ribi::WtDialWidget::paintEvent(Wt::WPaintDevice *paintDevice) {   Wt::WPainter painter(paintDevice);   this->DrawDial(painter,m_widget.get()); } void ribi::WtDialWidget::resize(const Wt::WLength& width, const Wt::WLength& height) {   Wt::WPaintedWidget::resize(width,height); }