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qgssymbolv2.h
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qgssymbolv2.h
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#ifndef QGSSYMBOLV2_H
#define QGSSYMBOLV2_H
#include "qgis.h"
#include <QList>
class QColor;
class QImage;
class QPainter;
class QSize;
class QPointF;
class QPolygonF;
//class
class QgsSymbolLayerV2;
class QgsRenderContext;
typedef QList<QgsSymbolLayerV2*> QgsSymbolLayerV2List;
class CORE_EXPORT QgsSymbolV2
{
public:
enum OutputUnit
{
MM,
MapUnit
};
enum SymbolType
{
Marker,
Line,
Fill
};
//! @note added in 1.5
enum RenderHint
{
DataDefinedSizeScale = 1,
DataDefinedRotation = 2
};
virtual ~QgsSymbolV2();
//! return new default symbol for specified geometry type
static QgsSymbolV2* defaultSymbol( QGis::GeometryType geomType );
SymbolType type() const { return mType; }
// symbol layers handling
QgsSymbolLayerV2* symbolLayer( int layer );
int symbolLayerCount() { return mLayers.count(); }
//! insert symbol layer to specified index
bool insertSymbolLayer( int index, QgsSymbolLayerV2* layer );
//! append symbol layer at the end of the list
bool appendSymbolLayer( QgsSymbolLayerV2* layer );
//! delete symbol layer at specified index
bool deleteSymbolLayer( int index );
//! remove symbol layer from the list and return pointer to it
QgsSymbolLayerV2* takeSymbolLayer( int index );
//! delete layer at specified index and set a new one
bool changeSymbolLayer( int index, QgsSymbolLayerV2* layer );
void startRender( QgsRenderContext& context );
void stopRender( QgsRenderContext& context );
void setColor( const QColor& color );
QColor color();
void drawPreviewIcon( QPainter* painter, QSize size );
QImage bigSymbolPreviewImage();
QString dump();
virtual QgsSymbolV2* clone() const = 0;
OutputUnit outputUnit() const { return mOutputUnit; }
void setOutputUnit( OutputUnit u ) { mOutputUnit = u; }
qreal alpha() const { return mAlpha; }
void setAlpha( qreal alpha ) { mAlpha = alpha; }
//! @note added in 1.5
void setRenderHints( int hints ) { mRenderHints = hints; }
//! @note added in 1.5
int renderHints() { return mRenderHints; }
protected:
QgsSymbolV2( SymbolType type, QgsSymbolLayerV2List layers ); // can't be instantiated
QgsSymbolLayerV2List cloneLayers() const;
//! check whether a symbol layer type can be used within the symbol
//! (marker-marker, line-line, fill-fill/line)
//! @note added in 1.7
bool isSymbolLayerCompatible( SymbolType t );
SymbolType mType;
QgsSymbolLayerV2List mLayers;
OutputUnit mOutputUnit;
/**Symbol opacity (in the range 0 - 1)*/
qreal mAlpha;
int mRenderHints;
};
///////////////////////
class CORE_EXPORT QgsSymbolV2RenderContext
{
public:
QgsSymbolV2RenderContext( QgsRenderContext& c, QgsSymbolV2::OutputUnit u , qreal alpha = 1.0, bool selected = false, int renderHints = 0 );
~QgsSymbolV2RenderContext();
QgsRenderContext& renderContext() { return mRenderContext; }
//void setRenderContext( QgsRenderContext& c ) { mRenderContext = c;}
QgsSymbolV2::OutputUnit outputUnit() const { return mOutputUnit; }
void setOutputUnit( QgsSymbolV2::OutputUnit u ) { mOutputUnit = u; }
qreal alpha() const { return mAlpha; }
void setAlpha( qreal alpha ) { mAlpha = alpha; }
bool selected() const { return mSelected; }
void setSelected( bool selected ) { mSelected = selected; }
//! @note added in 1.5
int renderHints() const { return mRenderHints; }
//! @note added in 1.5
void setRenderHints( int hints ) { mRenderHints = hints; }
// Color used for selections
static QColor selectionColor();
double outputLineWidth( double width ) const;
double outputPixelSize( double size ) const;
// workaround for sip 4.7. Don't use assignment - will fail with assertion error
QgsSymbolV2RenderContext& operator=( const QgsSymbolV2RenderContext& );
private:
QgsRenderContext& mRenderContext;
QgsSymbolV2::OutputUnit mOutputUnit;
qreal mAlpha;
bool mSelected;
int mRenderHints;
};
//////////////////////
class CORE_EXPORT QgsMarkerSymbolV2 : public QgsSymbolV2
{
public:
QgsMarkerSymbolV2( QgsSymbolLayerV2List layers = QgsSymbolLayerV2List() );
void setAngle( double angle );
double angle();
void setSize( double size );
double size();
void renderPoint( const QPointF& point, QgsRenderContext& context, int layer = -1, bool selected = false );
virtual QgsSymbolV2* clone() const;
};
class CORE_EXPORT QgsLineSymbolV2 : public QgsSymbolV2
{
public:
QgsLineSymbolV2( QgsSymbolLayerV2List layers = QgsSymbolLayerV2List() );
void setWidth( double width );
double width();
void renderPolyline( const QPolygonF& points, QgsRenderContext& context, int layer = -1, bool selected = false );
virtual QgsSymbolV2* clone() const;
};
class CORE_EXPORT QgsFillSymbolV2 : public QgsSymbolV2
{
public:
QgsFillSymbolV2( QgsSymbolLayerV2List layers = QgsSymbolLayerV2List() );
void setAngle( double angle );
void renderPolygon( const QPolygonF& points, QList<QPolygonF>* rings, QgsRenderContext& context, int layer = -1, bool selected = false );
virtual QgsSymbolV2* clone() const;
};
#endif
/*
QgsSymbolV2* ps = new QgsPointSymbol();
// ----
sl = QgsSymbolLayerV2Registry::instance()->createSymbolLayer("SimpleLine", { "color", "..." })
// (or)
sl = QgsSymbolLayerV2Registry::defaultSymbolLayer(QgsSymbolV2::Line)
// (or)
QgsSymbolLayerV2* sl = new QgsSimpleLineSymbolLayer(x,y,z);
QgsLineSymbol* s = new LineSymbol( [ sl ] );
// ----
rend = QgsSingleSymbolRenderer( new LineSymbol() );
*/