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## com.trolltech.qt.core
Class QPointF

    java.lang.Object
      com.trolltech.qt.internal.QSignalEmitterInternal
          com.trolltech.qt.QSignalEmitter
              com.trolltech.qt.QtJambiObject
                  com.trolltech.qt.core.QPointF

All Implemented Interfaces:
  QtJambiInterface, java.lang.Cloneable

    public class QPointF

extends QtJambiObject
implements java.lang.Cloneable

The `QPointF` class defines a point in the plane using floating point precision. A point is specified by a x coordinate and an y coordinate which can be accessed using the `x()` and `y()` functions. The coordinates of the point are specified using floating point numbers for accuracy. The `isNull()` function returns true if both x and y are set to 0.0. The coordinates can be set (or altered) using the `setX()` and `setY()` functions, or alternatively the rx() and ry() functions which return references to the coordinates (allowing direct manipulation).

Given a point p, the following statements are all equivalent:

            QPointF p = new QPointF();

            p.setX(p.x() + 1.0);
            p.add(new QPointF(1.0, 0.0));

A `QPointF` object can also be used as a vector: Addition and subtraction are defined as for vectors (each component is added separately). A `QPointF` object can also be divided or multiplied by an `int` or a `qreal`.

In addition, the `QPointF` class provides a constructor converting a `QPoint` object into a `QPointF` object, and a corresponding `toPoint()` function which returns a `QPoint` copy of this point. Finally, `QPointF` objects can be streamed as well as compared.

See also:
  `QPoint`, and `QPolygonF`.

Nested Class Summary

Nested classes/interfaces inherited from class com.trolltech.qt.QSignalEmitter
`QSignalEmitter.AbstractSignal, QSignalEmitter.Signal0, QSignalEmitter.Signal1, QSignalEmitter.Signal2, QSignalEmitter.Signal3, QSignalEmitter.Signal4, QSignalEmitter.Signal5, QSignalEmitter.Signal6, QSignalEmitter.Signal7, QSignalEmitter.Signal8, QSignalEmitter.Signal9`

Nested classes/interfaces inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
`com.trolltech.qt.internal.QSignalEmitterInternal.AbstractSignalInternal`

Field Summary

Fields inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
`currentSender`

Constructor Summary
`QPointF()` Constructs a null point, i.
`QPointF(double xpos, double ypos)` Constructs a point with the given coordinates (`x`, `y`).
`QPointF(QPoint p)` Constructs a copy of the given `point`.

Method Summary
`QPointF` | `add(QPointF p)` Adds `p` to this QPointF and returns the result.
`QPointF` | `clone()` This method is reimplemented for internal reasons
`QPointF` | `divide(double d)` Divides this QPointF by deviser `s` and returns the result.
`boolean` | `isNull()` Returns true if both the x and y coordinates are set to 0.0, otherwise returns false.
`QPointF` | `multiply(double d)` Multiplies this QPointF by factor `d` and returns the result.
`void` | `readFrom(QDataStream arg__1)` Reads a QPointF
`void` | `setX(double x)` Sets the x coordinate of this point to the given `x` coordinate.
`void` | `setY(double y)` Sets the y coordinate of this point to the given `y` coordinate.
`QPointF` | `subtract(QPointF p)` Subtracts `p` from this QPointF and returns the result.
`QPoint` | `toPoint()` Rounds the coordinates of this point to the nearest integer, and returns a `QPoint` object with the rounded coordinates.
`java.lang.String` | `toString()` Returns a string representation of the `this QPointF`.
`void` | `writeTo(QDataStream arg__1)` Writes thisQPointF
`double` | `x()` Returns the x-coordinate of this point.
`double` | `y()` Returns the y-coordinate of this point.

Methods inherited from class com.trolltech.qt.QtJambiObject
`dispose, disposed, equals, finalize, reassignNativeResources, tr, tr, tr`

Methods inherited from class com.trolltech.qt.QSignalEmitter
`blockSignals, disconnect, disconnect, signalsBlocked, signalSender, thread`

Methods inherited from class com.trolltech.qt.internal.QSignalEmitterInternal
`__qt_signalInitialization`

Methods inherited from class java.lang.Object
`getClass, hashCode, notify, notifyAll, wait, wait, wait`

Methods inherited from interface com.trolltech.qt.QtJambiInterface
`disableGarbageCollection, nativeId, nativePointer, reenableGarbageCollection, setJavaOwnership`

Constructor Detail

### QPointF

    public QPointF()

  Constructs a null point, i. . with coordinates (0.0, 0.0)

See also:
  `isNull()`.

### QPointF

    public QPointF(QPoint p)

  Constructs a copy of the given `point`.

See also:
  `toPoint()`.

### QPointF

    public QPointF(double xpos,
                   double ypos)

  Constructs a point with the given coordinates (`x`, `y`).

See also:
  `setX()`, and `setY()`.

Method Detail

### isNull

    public final boolean isNull()

  Returns true if both the x and y coordinates are set to 0.0, otherwise returns false.

### writeTo

    public final void writeTo(QDataStream arg__1)

  Writes thisQPointF

### readFrom

    public final void readFrom(QDataStream arg__1)

  Reads a QPointF

### setX

    public final void setX(double x)

  Sets the x coordinate of this point to the given `x` coordinate.

See also:
  `x()`, and `setY()`.

### setY

    public final void setY(double y)

  Sets the y coordinate of this point to the given `y` coordinate.

See also:
  `y()`, and `setX()`.

### toPoint

    public final QPoint toPoint()

  Rounds the coordinates of this point to the nearest integer, and returns a `QPoint` object with the rounded coordinates.

See also:
  QPointF().

### x

    public final double x()

  Returns the x-coordinate of this point.

See also:
  `setX()`, and rx().

### y

    public final double y()

  Returns the y-coordinate of this point.

See also:
  `setY()`, and ry().

### multiply

    public final QPointF multiply(double d)

  Multiplies this QPointF by factor `d` and returns the result.

### divide

    public final QPointF divide(double d)

  Divides this QPointF by deviser `s` and returns the result.

### add

    public final QPointF add(QPointF p)

  Adds `p` to this QPointF and returns the result.

### subtract

    public final QPointF subtract(QPointF p)

  Subtracts `p` from this QPointF and returns the result.

### toString

    public java.lang.String toString()

  Returns a string representation of the `this QPointF`.

  Overrides:
    `toString` in class `java.lang.Object`

### clone

    public QPointF clone()

  This method is reimplemented for internal reasons

  Overrides:
    `clone` in class `java.lang.Object`

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