The QwtDoublePoint class defines a point in double coordinates. More...
#include <qwt_double_rect.h>
Public Member Functions | |
| QwtDoublePoint () | |
| QwtDoublePoint (double x, double y) | |
| Constructs a point with coordinates specified by x and y. | |
| QwtDoublePoint (const QPoint &) | |
| QPoint | toPoint () const |
| bool | isNull () const |
| double | x () const |
| Returns the x-coordinate of the point. | |
| double | y () const |
| Returns the y-coordinate of the point. | |
| double & | rx () |
| Returns a reference to the x-coordinate of the point. | |
| double & | ry () |
| Returns a reference to the y-coordinate of the point. | |
| void | setX (double x) |
| Sets the x-coordinate of the point to the value specified by x. | |
| void | setY (double y) |
| Sets the y-coordinate of the point to the value specified by y. | |
| bool | operator== (const QwtDoublePoint &) const |
| bool | operator!= (const QwtDoublePoint &) const |
| Returns true if point1 is not equal to point2; otherwise returns false. | |
| const QwtDoublePoint | operator- () const |
| const QwtDoublePoint | operator+ (const QwtDoublePoint &) const |
| const QwtDoublePoint | operator- (const QwtDoublePoint &) const |
| const QwtDoublePoint | operator* (double) const |
| const QwtDoublePoint | operator/ (double) const |
| QwtDoublePoint & | operator+= (const QwtDoublePoint &) |
| QwtDoublePoint & | operator-= (const QwtDoublePoint &) |
| QwtDoublePoint & | operator*= (double) |
| QwtDoublePoint & | operator/= (double) |
The QwtDoublePoint class defines a point in double coordinates.
Definition at line 57 of file qwt_double_rect.h.
| QwtDoublePoint::QwtDoublePoint | ( | ) |
Constructs a null point.
Definition at line 22 of file qwt_double_rect.cpp.
Referenced by operator*(), operator+(), operator-(), and operator/().
:
d_x(0.0),
d_y(0.0)
{
}
| QwtDoublePoint::QwtDoublePoint | ( | double | x, |
| double | y | ||
| ) |
Constructs a point with coordinates specified by x and y.
Definition at line 29 of file qwt_double_rect.cpp.
| QwtDoublePoint::QwtDoublePoint | ( | const QPoint & | p ) |
Copy constructor.
Constructs a point using the values of the point specified.
Definition at line 40 of file qwt_double_rect.cpp.
:
d_x(double(p.x())),
d_y(double(p.y()))
{
}
| bool QwtDoublePoint::isNull | ( | ) | const [inline] |
Returns true if the point is null; otherwise returns false.
A point is considered to be null if both the x- and y-coordinates are equal to zero.
Definition at line 229 of file qwt_double_rect.h.
{
return d_x == 0.0 && d_y == 0.0;
}
| bool QwtDoublePoint::operator!= | ( | const QwtDoublePoint & | other ) | const |
Returns true if point1 is not equal to point2; otherwise returns false.
Definition at line 58 of file qwt_double_rect.cpp.
References operator==().
{
return !operator==(other);
}
| const QwtDoublePoint QwtDoublePoint::operator* | ( | double | factor ) | const |
Multiplies the coordinates of the point by the given scale factor, and returns a point with the new coordinates. (Scalar multiplication of a vector.)
Definition at line 99 of file qwt_double_rect.cpp.
References QwtDoublePoint().
{
return QwtDoublePoint(d_x * factor, d_y * factor);
}
| QwtDoublePoint & QwtDoublePoint::operator*= | ( | double | factor ) |
Multiplies the coordinates of this point by the given scale factor, and returns a reference to this point with the new coordinates. This is equivalent to scalar multiplication of a vector.
Definition at line 143 of file qwt_double_rect.cpp.
{
d_x *= factor;
d_y *= factor;
return *this;
}
| const QwtDoublePoint QwtDoublePoint::operator+ | ( | const QwtDoublePoint & | other ) | const |
Adds the coordinates of the point to the corresponding coordinates of the other point, and returns a point with the new coordinates. (Vector addition.)
Definition at line 77 of file qwt_double_rect.cpp.
References QwtDoublePoint().
{
return QwtDoublePoint(d_x + other.d_x, d_y + other.d_y);
}
| QwtDoublePoint & QwtDoublePoint::operator+= | ( | const QwtDoublePoint & | other ) |
Adds the coordinates of this point to the corresponding coordinates of the other point, and returns a reference to this point with the new coordinates. This is equivalent to vector addition.
Definition at line 119 of file qwt_double_rect.cpp.
{
d_x += other.d_x;
d_y += other.d_y;
return *this;
}
| const QwtDoublePoint QwtDoublePoint::operator- | ( | ) | const |
Negates the coordinates of the point, and returns a point with the new coordinates. (Inversion).
Definition at line 67 of file qwt_double_rect.cpp.
References QwtDoublePoint().
{
return QwtDoublePoint(-d_x, -d_y);
}
| const QwtDoublePoint QwtDoublePoint::operator- | ( | const QwtDoublePoint & | other ) | const |
Subtracts the coordinates of the other point from the corresponding coordinates of the given point, and returns a point with the new coordinates. (Vector subtraction.)
Definition at line 88 of file qwt_double_rect.cpp.
References QwtDoublePoint().
{
return QwtDoublePoint(d_x - other.d_x, d_y - other.d_y);
}
| QwtDoublePoint & QwtDoublePoint::operator-= | ( | const QwtDoublePoint & | other ) |
Subtracts the coordinates of the other point from the corresponding coordinates of this point, and returns a reference to this point with the new coordinates. This is equivalent to vector subtraction.
Definition at line 131 of file qwt_double_rect.cpp.
{
d_x -= other.d_x;
d_y -= other.d_y;
return *this;
}
| const QwtDoublePoint QwtDoublePoint::operator/ | ( | double | factor ) | const |
Divides the coordinates of the point by the given scale factor, and returns a point with the new coordinates. (Scalar division of a vector.)
Definition at line 109 of file qwt_double_rect.cpp.
References QwtDoublePoint().
{
return QwtDoublePoint(d_x / factor, d_y / factor);
}
| QwtDoublePoint & QwtDoublePoint::operator/= | ( | double | factor ) |
Divides the coordinates of this point by the given scale factor, and returns a references to this point with the new coordinates. This is equivalent to scalar division of a vector.
Definition at line 155 of file qwt_double_rect.cpp.
{
d_x /= factor;
d_y /= factor;
return *this;
}
| bool QwtDoublePoint::operator== | ( | const QwtDoublePoint & | other ) | const |
Returns true if point1 is equal to point2; otherwise returns false.
Two points are equal to each other if both x-coordinates and both y-coordinates are the same.
Definition at line 52 of file qwt_double_rect.cpp.
Referenced by operator!=().
{
return (d_x == other.d_x) && (d_y == other.d_y);
}
| double & QwtDoublePoint::rx | ( | ) | [inline] |
Returns a reference to the x-coordinate of the point.
Definition at line 247 of file qwt_double_rect.h.
{
return d_x;
}
| double & QwtDoublePoint::ry | ( | ) | [inline] |
Returns a reference to the y-coordinate of the point.
Definition at line 253 of file qwt_double_rect.h.
{
return d_y;
}
| void QwtDoublePoint::setX | ( | double | x ) | [inline] |
Sets the x-coordinate of the point to the value specified by x.
Definition at line 259 of file qwt_double_rect.h.
References x().
Referenced by QwtPlotCurve::drawLines().
{
d_x = x;
}
| void QwtDoublePoint::setY | ( | double | y ) | [inline] |
Sets the y-coordinate of the point to the value specified by y.
Definition at line 265 of file qwt_double_rect.h.
References y().
Referenced by QwtPlotCurve::drawLines().
{
d_y = y;
}
| QPoint QwtDoublePoint::toPoint | ( | ) | const [inline] |
Rounds the coordinates of this point to the nearest integer and returns a QPoint with these rounded coordinates.
Definition at line 274 of file qwt_double_rect.h.
{
return QPoint(qRound(d_x), qRound(d_y));
}
| double QwtDoublePoint::x | ( | ) | const [inline] |
Returns the x-coordinate of the point.
Definition at line 235 of file qwt_double_rect.h.
Referenced by boundingRect(), QwtDoubleRect::contains(), QwtDoubleRect::moveCenter(), QwtDoubleRect::moveTo(), QmitkHistogramWidget::OnSelect(), qwtPolar2Pos(), QwtPlotMarker::setValue(), setX(), QwtPlotPicker::trackerText(), and QwtPlotPicker::transform().
{
return d_x;
}
| double QwtDoublePoint::y | ( | ) | const [inline] |
Returns the y-coordinate of the point.
Definition at line 241 of file qwt_double_rect.h.
Referenced by boundingRect(), QwtDoubleRect::contains(), QwtDoubleRect::moveCenter(), QwtDoubleRect::moveTo(), qwtPolar2Pos(), QwtPlotMarker::setValue(), setY(), QwtPlotPicker::trackerText(), and QwtPlotPicker::transform().
{
return d_y;
}
1.7.2