QGIS API Documentation  2.17.0-Master (00653d2)
Public Member Functions | Protected Member Functions | List of all members
QgsRasterDrawer Class Reference

The drawing pipe for raster layers. More...

#include <qgsrasterdrawer.h>

Public Member Functions

 QgsRasterDrawer (QgsRasterIterator *iterator)
void draw (QPainter *p, QgsRasterViewPort *viewPort, const QgsMapToPixel *theQgsMapToPixel, const QgsRenderContext *ctx=nullptr, QgsRasterBlockFeedback *feedback=nullptr)
 Draws raster data. More...

Protected Member Functions

void drawImage (QPainter *p, QgsRasterViewPort *viewPort, const QImage &img, int topLeftCol, int topLeftRow, const QgsMapToPixel *mapToPixel=nullptr) const
 Draws raster part. More...

Detailed Description

The drawing pipe for raster layers.

Definition at line 35 of file qgsrasterdrawer.h.

Constructor & Destructor Documentation

§ QgsRasterDrawer()

QgsRasterDrawer::QgsRasterDrawer ( QgsRasterIterator iterator)

Definition at line 29 of file qgsrasterdrawer.cpp.

Member Function Documentation

§ draw()

void QgsRasterDrawer::draw ( QPainter p,
QgsRasterViewPort viewPort,
const QgsMapToPixel theQgsMapToPixel,
const QgsRenderContext ctx = nullptr,
QgsRasterBlockFeedback feedback = nullptr 

Draws raster data.

pdestination QPainter
viewPortviewport to render
theQgsMapToPixelmap to pixel converter
ctxrender context
feedbackoptional raster feedback object for cancellation/preview. Added in QGIS 2.18.

Definition at line 33 of file qgsrasterdrawer.cpp.

§ drawImage()

void QgsRasterDrawer::drawImage ( QPainter p,
QgsRasterViewPort viewPort,
const QImage img,
int  topLeftCol,
int  topLeftRow,
const QgsMapToPixel mapToPixel = nullptr 
) const

Draws raster part.

pthe painter to draw to
viewPortview port to draw to
imgimage to draw
topLeftColLeft position relative to left border of viewport
topLeftRowTop position relative to top border of viewport
mapToPixelmap to device coordinate transformation info
not available in python bindings

Definition at line 115 of file qgsrasterdrawer.cpp.

The documentation for this class was generated from the following files: