mirror of
https://github.com/qgis/QGIS.git
synced 2025-02-24 00:47:57 -05:00
f3cb57b1eb
- update methods of existing classes - add comment to methods missing in the sip bindings - split up collective sip files into single files and use same directory structure in python/ as in src/ - add a lot of missing classes (some might not make sense because of missing python methods in those classes) - remove some non-existing methods from the header files - add scripts/sipdiff - replace some usages of std::vector and std::set with QVector/QSet
66 lines
1.7 KiB
Plaintext
66 lines
1.7 KiB
Plaintext
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/**
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* \class QgsScaleCalculator
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* \brief Calculates scale for a given combination of canvas size, map extent,
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* and monitor dpi.
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*/
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class QgsScaleCalculator
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{
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%TypeHeaderCode
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#include <qgsscalecalculator.h>
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%End
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public:
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/**
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* Constructor
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* @param dpi Monitor resolution in dots per inch
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* @param mapUnits Units of the data on the map. Must match a value from the
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* QGis::UnitType enum (Meters, Feet, Degrees)
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*/
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QgsScaleCalculator( double dpi = 0,
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QGis::UnitType mapUnits = QGis::Meters );
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//! Destructor
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~QgsScaleCalculator();
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/**
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* Set the dpi to be used in scale calculations
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* @param dpi Dots per inch of monitor resolution
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*/
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void setDpi( double dpi );
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/**
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* Accessor for dpi used in scale calculations
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* @return int the dpi used for scale calculations.
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*/
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double dpi();
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/**
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* Set the map units
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* @param mapUnits Units of the data on the map. Must match a value from the
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*/
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void setMapUnits( QGis::UnitType mapUnits );
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/** Returns current map units */
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QGis::UnitType mapUnits() const;
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/**
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* Calculate the scale
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* @param mapExtent QgsRectangle containing the current map extent
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* @param canvasWidth Width of the map canvas in pixel (physical) units
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* @return scale of current map view
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*/
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double calculate( const QgsRectangle &mapExtent, int canvasWidth );
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/**
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* Calculate the distance between two points in geographic coordinates.
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* Used to calculate scale for map views with geographic (decimal degree)
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* data.
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* @param mapExtent QgsRectangle containing the current map extent
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*/
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double calculateGeographicDistance( const QgsRectangle &mapExtent );
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};
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