Go back to Richel Bilderbeek's homepage.
Go back to Richel Bilderbeek's C++ page.
Technical facts
./CppQtNavigationableGraphicsView/CppQtNavigationableGraphicsView.pri
./CppQtNavigationableGraphicsView/qtnavigationablegraphicsview.h
//---------------------------------------------------------------------------
/*
QtNavigationableGraphicsView, navigationable QGraphicsView
Copyright (C) 2014-2015 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/CppQtNavigationableGraphicsView.htm
//---------------------------------------------------------------------------
#ifndef QTNAVIGATIONABLEGRAPHICSVIEW_H
#define QTNAVIGATIONABLEGRAPHICSVIEW_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;
namespace ribi {
class QtNavigationableGraphicsView : public QGraphicsView
{
Q_OBJECT
public:
QtNavigationableGraphicsView(QWidget *parent = 0);
QtNavigationableGraphicsView(const QtNavigationableGraphicsView&) = delete;
QtNavigationableGraphicsView& operator=(const QtNavigationableGraphicsView&) = delete;
void wheelEvent(QWheelEvent *event) override;
};
} //~namespace ribi
#endif // QTNAVIGATIONABLEGRAPHICSVIEW_H
|
./CppQtNavigationableGraphicsView/qtnavigationablegraphicsview.cpp
//---------------------------------------------------------------------------
/*
QtNavigationableGraphicsView, navigationable QGraphicsView
Copyright (C) 2014-2015 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/CppQtNavigationableGraphicsView.htm
//---------------------------------------------------------------------------
#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 "qtnavigationablegraphicsview.h"
#include <QGraphicsScene>
#include <QWheelEvent>
#pragma GCC diagnostic pop
ribi::QtNavigationableGraphicsView::QtNavigationableGraphicsView(QWidget *parent)
: QGraphicsView(parent)
{
QGraphicsScene * const s = new QGraphicsScene(this);
this->setScene(s);
}
void ribi::QtNavigationableGraphicsView::wheelEvent(QWheelEvent *event)
{
const double new_scale = 1.0 + (static_cast<double>(event->delta()) / 1000.0);
this->scale(new_scale,new_scale);
}
|
Go back to Richel Bilderbeek's C++ page.
Go back to Richel Bilderbeek's homepage.
This page has been created by the tool CodeToHtml