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(C++) QGraphicsSvgItemExample2

 

Technical facts

 

Application type(s)

Operating system(s) or programming environment(s)

IDE(s):

Project type:

C++ standard:

Compiler(s):

Libraries used:

 

 

 

 

 

Qt project file: ./CppQGraphicsSvgItemExample2/CppQGraphicsSvgItemExample2.pro

 

exists (../../DesktopApplication.pri) {
  include(../../DesktopApplication.pri)
}
!exists (../../DesktopApplication.pri) {
  QT += core printsupport
  QT += gui
  greaterThan(QT_MAJOR_VERSION, 4): QT += widgets svg
  CONFIG   += console
  CONFIG   -= app_bundle
  TEMPLATE = app
  CONFIG(release, debug|release) {
    DEFINES += NDEBUG NTRACE_BILDERBIKKEL
  }
  QMAKE_CXXFLAGS += -std=c++11 -Wall -Wextra -Weffc++
  unix {
    QMAKE_CXXFLAGS += -Werror
  }
}

exists(../../Libraries/Boost.pri) {
  include(../../Libraries/Boost.pri)
}
!exists(../../Libraries/Boost.pri) {
  win32 {
    INCLUDEPATH += \
      ../../Libraries/boost_1_55_0
  }
}

SOURCES += \
    qtmain.cpp \
    mygraphicsview.cpp

RESOURCES += \
    CppQGraphicsSvgItemExample2.qrc

HEADERS += \
    mygraphicsview.h

 

 

 

 

 

./CppQGraphicsSvgItemExample2/mygraphicsview.h

 

#ifndef MYGRAPHICSVIEW_H
#define MYGRAPHICSVIEW_H

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#pragma GCC diagnostic ignored "-Wunused-local-typedefs"
#pragma GCC diagnostic ignored "-Wunused-but-set-parameter"
#include <QGraphicsView>
#pragma GCC diagnostic pop

struct QWheelEvent;

class MyGraphicsView : public QGraphicsView
{
  Q_OBJECT

  public:
  MyGraphicsView(QWidget *parent = 0);
  MyGraphicsView(const MyGraphicsView&) = delete;
  MyGraphicsView& operator=(const MyGraphicsView&) = delete;

  void wheelEvent(QWheelEvent *event);
};

#endif // MYGRAPHICSVIEW_H

 

 

 

 

 

./CppQGraphicsSvgItemExample2/mygraphicsview.cpp

 

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#pragma GCC diagnostic ignored "-Wunused-local-typedefs"
#pragma GCC diagnostic ignored "-Wunused-but-set-parameter"
#include "mygraphicsview.h"

#include <QWheelEvent>
#pragma GCC diagnostic pop


MyGraphicsView::MyGraphicsView(QWidget *parent)
  : QGraphicsView(parent)
{

}

void MyGraphicsView::wheelEvent(QWheelEvent *event)
{
  const double new_scale = 1.0 + (static_cast<double>(event->delta()) / 1000.0);
  this->scale(new_scale,new_scale);
}

 

 

 

 

 

./CppQGraphicsSvgItemExample2/qtmain.cpp

 

#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Weffc++"
#pragma GCC diagnostic ignored "-Wunused-local-typedefs"
#pragma GCC diagnostic ignored "-Wunused-but-set-parameter"
#include <QApplication>
#include <QGraphicsScene>
#include <QGraphicsSvgItem>
#include "mygraphicsview.h"
#pragma GCC diagnostic pop


int main(int argc, char *argv[])
{
  QApplication a(argc, argv);

  QGraphicsSvgItem i(":/images/CppQGraphicsSvgItemExample2.svg");
  i.setScale(0.25);

  QGraphicsScene s;
  s.addItem(&i);

  MyGraphicsView w;
  w.setGeometry(100,100,200,200);
  w.setScene(&s);

  w.show();
  return a.exec();
}

 

 

 

 

 

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