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119 lines
4.8 KiB
Plaintext
119 lines
4.8 KiB
Plaintext
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/*! \class QgsRectangle
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* \brief A rectangle specified with double values.
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*
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* QgsRectangle is used to store a rectangle when double values are required.
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* Examples are storing a layer extent or the current view extent of a map
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*/
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class QgsRectangle
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{
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%TypeHeaderCode
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#include <qgsrectangle.h>
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%End
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public:
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//! Constructor
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QgsRectangle( double xmin = 0, double ymin = 0, double xmax = 0, double ymax = 0 );
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//! Construct a rectangle from two points. The rectangle is normalized after construction.
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QgsRectangle( const QgsPoint & p1, const QgsPoint & p2 );
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//! Construct a rectangle from a QRectF. The rectangle is normalized after construction.
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//! @note added in 2.0
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QgsRectangle( const QRectF & qRectF );
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//! Copy constructor
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QgsRectangle( const QgsRectangle &other );
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//! Destructor
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~QgsRectangle();
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//! Set the rectangle from two QgsPoints. The rectangle is
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//! normalised after construction.
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void set( const QgsPoint& p1, const QgsPoint& p2 );
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//! Set the rectangle from four points. The rectangle is
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//! normalised after construction.
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void set( double xmin, double ymin, double xmax, double ymax );
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//! Set the minimum x value
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void setXMinimum( double x );
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//! Set the maximum x value
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void setXMaximum( double x );
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//! Set the minimum y value
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void setYMinimum( double y );
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//! Set the maximum y value
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void setYMaximum( double y );
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//! Set a rectangle so that min corner is at max
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//! and max corner is at min. It is NOT normalized.
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void setMinimal();
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//! Get the x maximum value (right side of rectangle)
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double xMaximum() const;
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//! Get the x minimum value (left side of rectangle)
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double xMinimum() const;
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//! Get the y maximum value (top side of rectangle)
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double yMaximum() const;
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//! Get the y minimum value (bottom side of rectangle)
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double yMinimum() const;
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//! Normalize the rectangle so it has non-negative width/height
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void normalize();
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//! Width of the rectangle
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double width() const;
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//! Height of the rectangle
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double height() const;
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//! Center point of the rectangle
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QgsPoint center() const;
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//! Scale the rectangle around its center point
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void scale( double scaleFactor, const QgsPoint *c = 0 );
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void scale( double scaleFactor, double centerX, double centerY );
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/** Get rectangle enlarged by buffer.
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* @note added in 2.1 */
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QgsRectangle buffer( double width );
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//! return the intersection with the given rectangle
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QgsRectangle intersect( const QgsRectangle *rect ) const;
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//! returns true when rectangle intersects with other rectangle
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bool intersects( const QgsRectangle& rect ) const;
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//! return true when rectangle contains other rectangle
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//! @note added in version 1.1
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bool contains( const QgsRectangle& rect ) const;
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//! return true when rectangle contains a point
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//! @note added in version 1.3
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bool contains( const QgsPoint &p ) const;
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//! expand the rectangle so that covers both the original rectangle and the given rectangle
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void combineExtentWith( QgsRectangle *rect );
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//! expand the rectangle so that covers both the original rectangle and the given point
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void combineExtentWith( double x, double y );
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//! test if rectangle is empty
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//! Empty rectangle may still be non-null if it contains valid information (e.g. bounding box of a point)
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bool isEmpty() const;
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//! test if the rectangle is null (all coordinates zero or after call to setMinimal()).
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//! Null rectangle is also an empty rectangle.
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//! @note added in 2.4
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bool isNull() const;
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//! returns string representation in Wkt form
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QString asWktCoordinates() const;
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//! returns string representation as WKT Polygon
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//! @note added in 2.0
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QString asWktPolygon() const;
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//! returns a QRectF with same coordinates.
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//! @note added in 2.0
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QRectF toRectF() const;
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//! returns string representation of form xmin,ymin xmax,ymax
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QString toString( bool automaticPrecision = false ) const;
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//! overloaded toString that allows precision of numbers to be set
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QString toString( int thePrecision ) const;
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//! returns rectangle as a polygon
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QString asPolygon() const;
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/*! Comparison operator
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@return True if rectangles are equal
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*/
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bool operator==( const QgsRectangle &r1 ) const;
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/*! Comparison operator
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@return False if rectangles are equal
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*/
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bool operator!=( const QgsRectangle &r1 ) const;
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/** updates rectangle to include passed argument */
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void unionRect( const QgsRectangle& rect );
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/** Returns true if the rectangle has finite boundaries. Will
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return false if any of the rectangle boundaries are NaN or Inf. */
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bool isFinite() const;
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//! swap x/y
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//! @note added in 1.9
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void invert();
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};
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