Quantum GIS API Documentation
1.7.4
|
Renderer class which interpolates rgb values linear between the minimum and maximum value of the classification field. More...
#include <qgscontinuouscolorrenderer.h>
Public Member Functions | |
QgsContinuousColorRenderer (QGis::GeometryType type) | |
QgsContinuousColorRenderer (const QgsContinuousColorRenderer &other) | |
QgsContinuousColorRenderer & | operator= (const QgsContinuousColorRenderer &other) |
virtual | ~QgsContinuousColorRenderer () |
void | renderFeature (QgsRenderContext &renderContext, QgsFeature &f, QImage *img, bool selected, double opacity=1.0) |
Renders the feature using the minimum and maximum value of the classification field added in 1.2. | |
int | classificationField () const |
Returns the number of the classification field. | |
void | setClassificationField (int id) |
Sets the id of the classification field. | |
void | setMinimumSymbol (QgsSymbol *sy) |
Sets the symbol for the minimum value. | |
void | setMaximumSymbol (QgsSymbol *sy) |
Sets the symbol for the maximum value. | |
void | setDrawPolygonOutline (bool draw) |
Sets whether to draw the polygon outline. | |
const QgsSymbol * | minimumSymbol () const |
Returns the symbol for the minimum value. | |
const QgsSymbol * | maximumSymbol () const |
Returns the symbol for the maximum value. | |
bool | drawPolygonOutline () const |
whether to draw a polygon outline | |
virtual int | readXML (const QDomNode &rnode, QgsVectorLayer &vl) |
Reads the renderer configuration from an XML file. | |
virtual bool | writeXML (QDomNode &layer_node, QDomDocument &document, const QgsVectorLayer &vl) const |
Writes the contents of the renderer to a configuration file @ return true in case of success. | |
bool | needsAttributes () const |
Returns true. | |
QgsAttributeList | classificationAttributes () const |
Returns a list with the index of the classification attribute. | |
QString | name () const |
Returns the renderers name. | |
const QList< QgsSymbol * > | symbols () const |
Return symbology items. | |
QgsRenderer * | clone () const |
Returns a copy of the renderer (a deep copy on the heap) | |
Protected Attributes | |
int | mClassificationField |
Number of the classification field (it must be a numerical field) | |
QgsSymbol * | mMinimumSymbol |
Item for the minimum value. | |
QgsSymbol * | mMaximumSymbol |
Item for the maximum value. | |
bool | mDrawPolygonOutline |
Whether to draw the polygon outline or not. |
Renderer class which interpolates rgb values linear between the minimum and maximum value of the classification field.
Definition at line 31 of file qgscontinuouscolorrenderer.h.
Definition at line 32 of file qgscontinuouscolorrenderer.cpp.
References QgsRenderer::mGeometryType.
Referenced by clone().
Definition at line 37 of file qgscontinuouscolorrenderer.cpp.
References mClassificationField, QgsRenderer::mGeometryType, mMaximumSymbol, and mMinimumSymbol.
QgsContinuousColorRenderer::~QgsContinuousColorRenderer | ( | ) | [virtual] |
Definition at line 59 of file qgscontinuouscolorrenderer.cpp.
References mMaximumSymbol, and mMinimumSymbol.
QgsAttributeList QgsContinuousColorRenderer::classificationAttributes | ( | ) | const [virtual] |
Returns a list with the index of the classification attribute.
Implements QgsRenderer.
Definition at line 245 of file qgscontinuouscolorrenderer.cpp.
References mClassificationField.
int QgsContinuousColorRenderer::classificationField | ( | ) | const [inline] |
Returns the number of the classification field.
Definition at line 88 of file qgscontinuouscolorrenderer.h.
References mClassificationField.
Referenced by readXML().
QgsRenderer * QgsContinuousColorRenderer::clone | ( | ) | const [virtual] |
Returns a copy of the renderer (a deep copy on the heap)
Implements QgsRenderer.
Definition at line 311 of file qgscontinuouscolorrenderer.cpp.
References QgsContinuousColorRenderer().
bool QgsContinuousColorRenderer::drawPolygonOutline | ( | ) | const [inline] |
whether to draw a polygon outline
Definition at line 58 of file qgscontinuouscolorrenderer.h.
const QgsSymbol * QgsContinuousColorRenderer::maximumSymbol | ( | ) | const [inline] |
Returns the symbol for the maximum value.
Definition at line 103 of file qgscontinuouscolorrenderer.h.
References mMaximumSymbol.
const QgsSymbol * QgsContinuousColorRenderer::minimumSymbol | ( | ) | const [inline] |
Returns the symbol for the minimum value.
Definition at line 98 of file qgscontinuouscolorrenderer.h.
References mMinimumSymbol.
QString QgsContinuousColorRenderer::name | ( | ) | const [virtual] |
Returns the renderers name.
Implements QgsRenderer.
Definition at line 252 of file qgscontinuouscolorrenderer.cpp.
bool QgsContinuousColorRenderer::needsAttributes | ( | ) | const [inline, virtual] |
QgsContinuousColorRenderer & QgsContinuousColorRenderer::operator= | ( | const QgsContinuousColorRenderer & | other | ) |
Definition at line 45 of file qgscontinuouscolorrenderer.cpp.
References mClassificationField, QgsRenderer::mGeometryType, mMaximumSymbol, and mMinimumSymbol.
int QgsContinuousColorRenderer::readXML | ( | const QDomNode & | rnode, |
QgsVectorLayer & | vl | ||
) | [virtual] |
Reads the renderer configuration from an XML file.
rnode | the Dom node to read |
vl | the vector layer which will be associated with the renderer |
Implements QgsRenderer.
Definition at line 194 of file qgscontinuouscolorrenderer.cpp.
References classificationField(), QgsVectorLayer::dataProvider(), QgsVectorDataProvider::fieldNameIndex(), QgsVectorLayer::geometryType(), mDrawPolygonOutline, QgsRenderer::mGeometryType, QgsSymbol::readXML(), setClassificationField(), setMaximumSymbol(), setMinimumSymbol(), and QgsVectorLayer::setRenderer().
void QgsContinuousColorRenderer::renderFeature | ( | QgsRenderContext & | renderContext, |
QgsFeature & | f, | ||
QImage * | img, | ||
bool | selected, | ||
double | opacity = 1.0 |
||
) | [virtual] |
Renders the feature using the minimum and maximum value of the classification field added in 1.2.
Implements QgsRenderer.
Definition at line 77 of file qgscontinuouscolorrenderer.cpp.
References QgsFeature::attributeMap(), QgsSymbol::brush(), QgsSymbol::fillColor(), QgsMarkerCatalogue::imageMarker(), QgsMarkerCatalogue::instance(), QGis::Line, QgsSymbol::lowerValue(), mClassificationField, mDrawPolygonOutline, QgsRenderer::mGeometryType, mMaximumSymbol, mMinimumSymbol, QgsRenderer::mSelectionColor, QgsRenderContext::painter(), QgsSymbol::pen(), QGis::Point, QgsSymbol::pointSize(), QgsSymbol::pointSymbolName(), QGis::Polygon, QgsRenderContext::rasterScaleFactor(), and QgsRenderContext::scaleFactor().
void QgsContinuousColorRenderer::setClassificationField | ( | int | id | ) | [inline] |
Sets the id of the classification field.
Definition at line 93 of file qgscontinuouscolorrenderer.h.
References mClassificationField.
Referenced by readXML().
void QgsContinuousColorRenderer::setDrawPolygonOutline | ( | bool | draw | ) | [inline] |
Sets whether to draw the polygon outline.
Definition at line 52 of file qgscontinuouscolorrenderer.h.
void QgsContinuousColorRenderer::setMaximumSymbol | ( | QgsSymbol * | sy | ) |
Sets the symbol for the maximum value.
The symbol has to be created using the new operator and is automatically deleted when inserting a new symbol or when the instance is destroyed
Definition at line 71 of file qgscontinuouscolorrenderer.cpp.
References mMaximumSymbol.
Referenced by readXML().
void QgsContinuousColorRenderer::setMinimumSymbol | ( | QgsSymbol * | sy | ) |
Sets the symbol for the minimum value.
The symbol has to be created using the new operator and is automatically deleted when inserting a new symbol or when the instance is destroyed
Definition at line 65 of file qgscontinuouscolorrenderer.cpp.
References mMinimumSymbol.
Referenced by readXML().
const QList< QgsSymbol * > QgsContinuousColorRenderer::symbols | ( | ) | const [virtual] |
Return symbology items.
Implements QgsRenderer.
Definition at line 303 of file qgscontinuouscolorrenderer.cpp.
References mMaximumSymbol, and mMinimumSymbol.
bool QgsContinuousColorRenderer::writeXML | ( | QDomNode & | layer_node, |
QDomDocument & | document, | ||
const QgsVectorLayer & | vl | ||
) | const [virtual] |
Writes the contents of the renderer to a configuration file @ return true in case of success.
Implements QgsRenderer.
Definition at line 257 of file qgscontinuouscolorrenderer.cpp.
References QgsVectorLayer::dataProvider(), QgsVectorDataProvider::fields(), mClassificationField, mDrawPolygonOutline, mMaximumSymbol, mMinimumSymbol, and QgsSymbol::writeXML().
int QgsContinuousColorRenderer::mClassificationField [protected] |
Number of the classification field (it must be a numerical field)
Definition at line 79 of file qgscontinuouscolorrenderer.h.
Referenced by classificationAttributes(), classificationField(), operator=(), QgsContinuousColorRenderer(), renderFeature(), setClassificationField(), and writeXML().
bool QgsContinuousColorRenderer::mDrawPolygonOutline [protected] |
Whether to draw the polygon outline or not.
Definition at line 85 of file qgscontinuouscolorrenderer.h.
Referenced by readXML(), renderFeature(), and writeXML().
QgsSymbol* QgsContinuousColorRenderer::mMaximumSymbol [protected] |
Item for the maximum value.
Definition at line 83 of file qgscontinuouscolorrenderer.h.
Referenced by maximumSymbol(), operator=(), QgsContinuousColorRenderer(), renderFeature(), setMaximumSymbol(), symbols(), writeXML(), and ~QgsContinuousColorRenderer().
QgsSymbol* QgsContinuousColorRenderer::mMinimumSymbol [protected] |
Item for the minimum value.
Definition at line 81 of file qgscontinuouscolorrenderer.h.
Referenced by minimumSymbol(), operator=(), QgsContinuousColorRenderer(), renderFeature(), setMinimumSymbol(), symbols(), writeXML(), and ~QgsContinuousColorRenderer().