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14ae0c6b4e
qgisappbase.ui - Removed empty Menu item that continually creeps in -- Developers
please make sure you aren't committing qgisappbase.ui with an
empty menu item.
qgsacetateobject - Modified constructor to create an object without an origin
point.
git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@2171 c8812cc2-4d05-0410-92ff-de0c093fc19c
82 lines
2.9 KiB
C++
82 lines
2.9 KiB
C++
/***************************************************************************
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qgsacetateobject.h
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An object that can be drawn on the acetate layer of a QgsMapCanvas
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-------------------
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begin : June 10, 2004
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copyright : (C) 2004 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 QGSACETATEOBJECT_H
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#define QGSACETATEOBJECT_H
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class QgsPoint;
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class QPainter;
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class QgsCoordinateTransform;
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/*! \class QgsAcetateObject
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* \brief Base class for all objects that are drawn on the acetate layer of a map canvas.
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*
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* An acetate object is a graphic or text object that is drawn on top of the map canvas
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* after rendering of all map elements is completed. Acetate objects can be drawn in
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* device coordinates or map coordinates. Drawing in map coordinates requires passing
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* a QgsCoordinateTransform object to the draw function.
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*
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* The draw function must be overridden in a subclass to provide the specfic logic for
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* drawing the object.
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*/
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class QgsAcetateObject
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{
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public:
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/**
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* Constructor. Constructs an object with the specified origin. If the object is
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* spatially referenced, the origin should be in map coordinates.
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*/
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QgsAcetateObject(QgsPoint &origin);
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/** Constructs an acetate object without an origin point. This is appropriate for
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* objects that are not point-centric, such as polygons or collections of acetate
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* objects.
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*/
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QgsAcetateObject();
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/**
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* Destructor
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*/
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virtual ~QgsAcetateObject();
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/**
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* Draw the object using the Qpainter and applying a coordinate transform if
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* specified.
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* @param painter Painter to use for drawing
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* @param cXf Coordinate transform to use in drawing map coordinate on the device. If
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* this parameter is not specified, coordinates are assumed to be device coordinates
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* rather than map coordinates.
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*/
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virtual void draw (QPainter * painter, QgsCoordinateTransform * cXf=0)=0;
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/**
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* Set the origin point
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* @param value Point of origin
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*/
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void setOrigin (QgsPoint value );
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/**
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* Returns the point of origin
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*/
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QgsPoint origin();
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private:
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//! Origin of the object in device or map coordinates
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QgsPoint mOrigin;
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};
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#endif //QGSACETATEOBJECT_H
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