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/*
Copyright 2010 Christian Vetter veaac.fdirct@gmail.com
This file is part of MoNav.
MoNav 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.
MoNav 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 MoNav. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef RENDERERBASE_H
#define RENDERERBASE_H
#include <QObject>
#include <QCache>
#include <vector>
#include "interfaces/irenderer.h"
#include "utils/coordinates.h"
#include "brsettingsdialog.h"
class RendererBase : public QObject, public IRenderer
{
Q_OBJECT
Q_INTERFACES( IRenderer )
public:
RendererBase();
virtual ~RendererBase();
virtual QString GetName() = 0;
virtual void SetInputDirectory( const QString& dir );
virtual void ShowSettings();
virtual bool LoadData();
virtual bool UnloadData();
virtual int GetMaxZoom();
virtual ProjectedCoordinate Move( int shiftX, int shiftY, const PaintRequest& request );
virtual ProjectedCoordinate PointToCoordinate( int shiftX, int shiftY, const PaintRequest& request );
virtual bool Paint( QPainter* painter, const PaintRequest& request );
virtual void SetUpdateSlot( QObject* obj, const char* slot );
signals:
void changed();
protected:
//CALLBACKS FOR DERIVED CLASSES:
// gets called after the user changed advanced settings
virtual void advancedSettingsChanged();
// gets called whenever a tile cache miss occurs
// has to load / draw tile with coordinates (x,y)
// magnification is passed as a hint. If the derived class can draw higher resolution tiles,
// it may increase the tile size by this factor to match screen resolution
virtual bool loadTile( int x, int y, int zoom, int magnification, QPixmap** tile ) = 0;
// gets called when loading the map data
virtual bool load() = 0;
// gets called to unload the map data
virtual void unload() = 0;
// computes the tileID from x,y and zoom level
long long tileID( int x, int y, int zoom );
// sets up basic polygons for source / target / arrows
void setupPolygons();
// draws an arrow at position x,y with direction rotation
void drawArrow( QPainter* painter, int x, int y, double rotation, QColor outer, QColor inner );
// draws an indicator for a place / source / target
// gets replaced by an arrow if it is outside the screen
void drawIndicator( QPainter* painter, const QTransform& transform, const QTransform& inverseTransform, int x, int y, int sizeX, int sizeY, int virtualZoom, QColor outer, QColor inner );
// draw an indicator circle that is not replaced by an arrow
void drawCircle( QPainter* painter, const QTransform& transform, const QTransform& inverseTransform, int x, int y, int sizeX, int sizeY, int virtualZoom, QColor outer, QColor inner );
// draws a polyline, clipping it if necessary and applying basic LOD
void drawPolyline( QPainter* painter, const QRect& boundingBox, QVector< ProjectedCoordinate > line, QColor color );
// should be used by derived classes to add additional settings
QDialog* m_advancedSettings;
// should be set by the derived class
int m_tileSize;
// has to be filled by the derived class with all possible zoom levels
std::vector< int > m_zoomLevels;
// the current map data directory
QString m_directory;
// the tile cache
QCache< long long, QPixmap > m_cache;
// is a map package loaded?
bool m_loaded;
// polygon for the arrow indicator
QPolygonF m_arrow;
// basic settings
BRSettingsDialog::Settings m_settings;
// basic settings dialog
BRSettingsDialog* m_settingsDialog;
// the last magnification factor
int m_magnification;
};
#endif // RENDERERBASE_H
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