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src
core
qgsmaptopixel.h
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/***************************************************************************
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qgsmaptopixel.h - description
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-------------------
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begin : Sat Jun 22 2002
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copyright : (C) 2002 by Gary E.Sherman
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email : sherman at mrcc.com
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***************************************************************************/
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/***************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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***************************************************************************/
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/* $Id$ */
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#ifndef QGSMAPTOPIXEL
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#define QGSMAPTOPIXEL
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#include "
qgspoint.h
"
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#include <vector>
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#include <cassert>
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class
QgsPoint
;
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class
QPoint;
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class
CORE_EXPORT
QgsMapToPixel
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{
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public
:
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/* Constructor
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* @param mapUnitsPerPixel Map units per pixel
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* @param ymax Maximum y value of the map canvas
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* @param ymin Minimum y value of the map canvas
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* @param xmin Minimum x value of the map canvas
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*/
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QgsMapToPixel
(
double
mapUnitsPerPixel = 0,
double
ymax = 0,
double
ymin = 0,
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double
xmin = 0 );
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~
QgsMapToPixel
();
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QgsPoint
transform(
const
QgsPoint
& p )
const
;
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void
transform(
QgsPoint
* p )
const
;
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QgsPoint
transform(
double
x,
double
y )
const
;
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/* Transform device coordinates to map coordinates. Modifies the
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given coordinates in place. Intended as a fast way to do the
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transform. */
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void
transformInPlace(
double
& x,
double
& y )
const
;
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/* Transform device coordinates to map coordinates. Modifies the
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given coordinates in place. Intended as a fast way to do the
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transform. */
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void
transformInPlace( std::vector<double>& x,
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std::vector<double>& y )
const
;
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QgsPoint
toMapCoordinates(
int
x,
int
y )
const
;
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QgsPoint
toMapCoordinatesF(
double
x,
double
y )
const
;
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QgsPoint
toMapCoordinates( QPoint p )
const
;
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QgsPoint
toMapPoint(
double
x,
double
y )
const
;
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void
setMapUnitsPerPixel(
double
mapUnitsPerPixel );
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double
mapUnitsPerPixel()
const
;
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void
setYMaximum(
double
ymax );
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void
setYMinimum(
double
ymin );
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void
setXMinimum(
double
xmin );
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void
setParameters(
double
mapUnitsPerPixel,
double
xmin,
double
ymin,
double
ymax );
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QString showParameters();
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private
:
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double
mMapUnitsPerPixel
;
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double
yMax
;
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double
yMin
;
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double
xMin
;
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double
xMax
;
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};
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#endif // QGSMAPTOPIXEL
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