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Update qgsrasterlayer.h

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Harrissou Sant-anna 2020-01-20 12:52:05 +01:00 committed by Nyall Dawson
parent 1ebca43b33
commit 899feeec78
1 changed files with 15 additions and 15 deletions
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src/core/raster/qgsrasterlayer.h
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@ -56,20 +56,20 @@ typedef QList < QPair< QString, QColor > > QgsLegendColorList;
* The qgsrasterlayer class makes use of gdal for data io, and thus supports
* any gdal supported format. The constructor attempts to infer what type of
* file (LayerType) is being opened - not in terms of the file format (tif, ascii grid etc.)
* but rather in terms of whether the image is a GRAYSCALE, PaletteD or Multiband,
* but rather in terms of whether the image is a GRAYSCALE, PaletteD or Multiband.
*
* Within the three allowable raster layer types, there are 8 permutations of
* how a layer can actually be rendered. These are defined in the DrawingStyle enum
* and consist of:
*
* SingleBandGray -> a GRAYSCALE layer drawn as a range of gray colors (0-255)
* SingleBandPseudoColor -> a GRAYSCALE layer drawn using a pseudocolor algorithm
* PalettedSingleBandGray -> a PaletteD layer drawn in gray scale (using only one of the color components)
* PalettedSingleBandPseudoColor -> a PaletteD layer having only one of its color components rendered as pseudo color
* PalettedMultiBandColor -> a PaletteD image where the bands contains 24bit color info and 8 bits is pulled out per color
* MultiBandSingleBandGray -> a layer containing 2 or more bands, but using only one band to produce a grayscale image
* MultiBandSingleBandPseudoColor -> a layer containing 2 or more bands, but using only one band to produce a pseudocolor image
* MultiBandColor -> a layer containing 2 or more bands, mapped to the three RGBcolors. In the case of a multiband with only two bands, one band will have to be mapped to more than one color
* - SingleBandGray -> a GRAYSCALE layer drawn as a range of gray colors (0-255)
* - SingleBandPseudoColor -> a GRAYSCALE layer drawn using a pseudocolor algorithm
* - PalettedSingleBandGray -> a PaletteD layer drawn in gray scale (using only one of the color components)
* - PalettedSingleBandPseudoColor -> a PaletteD layer having only one of its color components rendered as pseudo color
* - PalettedMultiBandColor -> a PaletteD image where the bands contains 24bit color info and 8 bits is pulled out per color
* - MultiBandSingleBandGray -> a layer containing 2 or more bands, but using only one band to produce a grayscale image
* - MultiBandSingleBandPseudoColor -> a layer containing 2 or more bands, but using only one band to produce a pseudocolor image
* - MultiBandColor -> a layer containing 2 or more bands, mapped to the three RGBcolors. In the case of a multiband with only two bands, one band will have to be mapped to more than one color
*
* Each of the above mentioned drawing styles is implemented in its own draw* function.
* Some of the drawing styles listed above require statistics about the layer such
@ -96,7 +96,7 @@ typedef QList < QPair< QString, QColor > > QgsLegendColorList;
* QgsRasterLayer *myRasterLayer = new QgsRasterLayer(myFileNameQString, myBaseNameQString);
* \endcode
*
* In order to automate redrawing of a raster layer, you should link it to a map canvas like this :
* In order to automate redrawing of a raster layer, you should link it to a map canvas like this:
*
* \code{.cpp}
* QObject::connect( myRasterLayer, SIGNAL(repaintRequested()), mapCanvas, SLOT(refresh()) );
@ -210,15 +210,15 @@ class CORE_EXPORT QgsRasterLayer : public QgsMapLayer
*
* The main tasks carried out by the constructor are:
*
* -Load the rasters default style (.qml) file if it exists
* - Load the rasters default style (.qml) file if it exists
*
* -Populate the RasterStatsVector with initial values for each band.
* - Populate the RasterStatsVector with initial values for each band.
*
* -Calculate the layer extents
* - Calculate the layer extents
*
* -Determine whether the layer is gray, paletted or multiband.
* - Determine whether the layer is gray, paletted or multiband.
*
* -Assign sensible defaults for the red, green, blue and gray bands.
* - Assign sensible defaults for the red, green, blue and gray bands.
* */
explicit QgsRasterLayer( const QString &uri,
const QString &baseName = QString(),