c696c85dd4
This change makes the viewer zoom in and out when using the scroll wheel. The zoom tracks the position of the mouse pointer when zooming in so that the map will be centered under the mouse after a zoom.
110 lines
2.7 KiB
C++
110 lines
2.7 KiB
C++
/* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2011 Artem Pavlenko
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*
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* Mapnik is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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//$Id$
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#ifndef MAP_WIDGET_HPP
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#define MAP_WIDGET_HPP
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#include <QWidget>
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#include <QImage>
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#include <QPixmap>
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#include <QPen>
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#include <QItemSelection>
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#include <iostream>
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#include <string>
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#include <boost/shared_ptr.hpp>
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#include <boost/scoped_ptr.hpp>
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#ifndef Q_MOC_RUN
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#include <mapnik/map.hpp>
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#endif
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class MapWidget : public QWidget
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{
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Q_OBJECT
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public:
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enum eTool
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{
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ZoomToBox = 1,
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Pan,
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Info,
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};
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enum eRenderer
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{
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AGG,
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Cairo,
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Grid
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};
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private:
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boost::shared_ptr<mapnik::Map> map_;
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int selected_;
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QPixmap pix_;
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mapnik::box2d<double> extent_;
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eTool cur_tool_;
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int start_x_;
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int start_y_;
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int end_x_;
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int end_y_;
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bool drag_;
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bool first_;
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QPen pen_;
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int selectedLayer_;
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double scaling_factor_;
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eRenderer cur_renderer_;
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public:
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MapWidget(QWidget *parent=0);
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void setTool(eTool tool);
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boost::shared_ptr<mapnik::Map> getMap();
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inline QPixmap const& pixmap() const { return pix_;}
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void setMap(boost::shared_ptr<mapnik::Map> map);
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void defaultView();
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void zoomToBox(mapnik::box2d<double> const& box);
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void zoomIn();
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void zoomOut();
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void panLeft();
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void panRight();
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void panUp();
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void panDown();
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void set_scaling_factor(double);
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public slots:
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void zoomToLevel(int level);
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void updateMap();
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void layerSelected(int);
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void updateRenderer(QString const& txt);
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signals:
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void mapViewChanged();
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protected:
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void paintEvent(QPaintEvent* ev);
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void resizeEvent(QResizeEvent* ev);
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void mousePressEvent(QMouseEvent* e);
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void mouseMoveEvent(QMouseEvent* e);
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void mouseReleaseEvent(QMouseEvent* e);
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void wheelEvent(QWheelEvent* e);
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void keyPressEvent(QKeyEvent *e);
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void export_to_file(unsigned width,
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unsigned height,
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std::string const& filename,
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std::string const& type);
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};
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#endif // MAP_WIDGET_HPP
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