# QPoint Class Reference
## [[QtCore](index.htm) module]
该QPoint类定义使用整数精度在平面上的一个点。[More...](#details)
### Methods
* `__init__ (self)`
* `__init__ (self, int xpos, int ypos)`
* `__init__ (self, QPoint)`
* `bool isNull (self)`
* `int manhattanLength (self)`
* `setX (self, int xpos)`
* `setY (self, int ypos)`
* `int x (self)`
* `int y (self)`
### Special Methods
* `QPoint __mul__ (self, QMatrix m)`
* `QPoint __mul__ (self, QMatrix4x4 matrix)`
* `QPoint __mul__ (self, QTransform m)`
* `QPoint __add__ (self, QPoint p2)`
* `int __bool__ (self)`
* `QPoint __div__ (self, float c)`
* `bool __eq__ (self, QPoint p2)`
* `QPoint __iadd__ (self, QPoint p)`
* `QPoint __idiv__ (self, float c)`
* `QPoint __imul__ (self, int c)`
* `QPoint __imul__ (self, float c)`
* `QPoint __isub__ (self, QPoint p)`
* `QPoint __mul__ (self, int c)`
* `QPoint __mul__ (self, QPoint p)`
* `QPoint __mul__ (self, float c)`
* `QPoint __mul__ (self, QPoint p)`
* `bool __ne__ (self, QPoint p2)`
* `QPoint __neg__ (self)`
* `str __repr__ (self)`
* `QPoint __sub__ (self, QPoint p2)`
* * *
## Detailed Description
这个类可以醃制。
该QPoint类定义使用整数精度在平面上的一个点。
被指定的点由斧头协调和使用y坐标可接的[x](qpoint.html#x)()和[y](qpoint.html#y)()函数。该[isNull](qpoint.html#isNull)如果x和y都设置为0 ()函数返回真。坐标可以使用设置(或改变)的[setX](qpoint.html#setX)()和[setY](qpoint.html#setY)()函数,或者在[rx](qpoint.html#rx)()和[ry](qpoint.html#ry)( ),它返回引用到坐标(允许直接操作)等功能。
给定一个点_p_,下面的语句是等价的:
```
QPoint p;
p.setX(p.x() + 1);
p += QPoint(1, 0);
p.rx()++;
```
甲QPoint对象也可以被用作载体:加法和减法的定义为矢量(每个组分单独加入) 。一个QPoint对象也可以通过分频或倍频`int`或`qreal`。
此外, QPoint类提供[manhattanLength](qpoint.html#manhattanLength)()函数,它给出了QPoint物体的长度的一种廉价的近似解释为一个向量。最后,相比QPoint对象可以被串流播放,以及。
* * *
## Method Documentation
```
QPoint.__init__ (self)
```
构造一个零点,即坐标为( 0,0)
**See also** [isNull](qpoint.html#isNull)( ) 。
```
QPoint.__init__ (self, int xpos, int ypos)
```
构造一个点与给定的坐标(_x_,_y_) 。
**See also** [setX](qpoint.html#setX)()和[setY](qpoint.html#setY)( ) 。
```
QPoint.__init__ (self, QPoint)
```
```
bool QPoint.isNull (self)
```
返回True如果x和y坐标都设置为0 ,否则返回False 。
```
int QPoint.manhattanLength (self)
```
返回的绝对值之和[x](qpoint.html#x)()和[y](qpoint.html#y)( ) ,传统上被称为“曼哈顿长度”从原点的向量的点。例如:
```
[QPoint](qpoint.html) oldPosition;
MyWidget.mouseMoveEvent([QMouseEvent](qmouseevent.html) *event)
{
[QPoint](qpoint.html) point = event->pos() - oldPosition;
if (point.manhattanLength() > 3)
// the mouse has moved more than 3 pixels since the oldPosition
}
```
这是一个有用的,快速的计算,近似真实的长度:
```
double trueLength = sqrt(pow(x(), 2) + pow(y(), 2));
```
“曼哈顿长度”的传统产生,是因为这样的距离适用于旅客谁只能行驶在矩形网格,就像曼哈顿的大街上。
```
QPoint.setX (self, int xpos)
```
设置该点的x坐标,以给定的_x_协调。
**See also** [x](qpoint.html#x)()和[setY](qpoint.html#setY)( ) 。
```
QPoint.setY (self, int ypos)
```
设置该点的y坐标为给定的_y_协调。
**See also** [y](qpoint.html#y)()和[setX](qpoint.html#setX)( ) 。
```
int QPoint.x (self)
```
返回该点的x坐标。
**See also** [setX](qpoint.html#setX)()和[rx](qpoint.html#rx)( ) 。
```
int QPoint.y (self)
```
返回此点的y坐标。
**See also** [setY](qpoint.html#setY)()和[ry](qpoint.html#ry)( ) 。
```
QPoint __mul__ (self, QMatrix m)
```
[
如果QtGui模块导入此方法仅适用。
](qpoint.html)
```
QPoint __mul__ (self, QMatrix4x4 matrix)
```
[
如果QtGui模块导入此方法仅适用。
](qpoint.html)
```
QPoint __mul__ (self, QTransform m)
```
[
如果QtGui模块导入此方法仅适用。
](qpoint.html)
```
QPoint QPoint.__add__ (self, QPoint p2)
```
[
```
int QPoint.__bool__ (self)
```
](qpoint.html)
```
QPoint QPoint.__div__ (self, float c)
```
[
```
bool QPoint.__eq__ (self, QPoint p2)
```
](qpoint.html)
```
QPoint QPoint.__iadd__ (self, QPoint p)
```
[](qpoint.html)
```
QPoint QPoint.__idiv__ (self, float c)
```
[](qpoint.html)
```
QPoint QPoint.__imul__ (self, int c)
```
[](qpoint.html)
```
QPoint QPoint.__imul__ (self, float c)
```
[](qpoint.html)
```
QPoint QPoint.__isub__ (self, QPoint p)
```
[](qpoint.html)
```
QPoint QPoint.__mul__ (self, int c)
```
[](qpoint.html)
```
QPoint QPoint.__mul__ (self, QPoint p)
```
[](qpoint.html)
```
QPoint QPoint.__mul__ (self, float c)
```
[](qpoint.html)
```
QPoint QPoint.__mul__ (self, QPoint p)
```
[
```
bool QPoint.__ne__ (self, QPoint p2)
```
](qpoint.html)
```
QPoint QPoint.__neg__ (self)
```
[
```
str QPoint.__repr__ (self)
```
](qpoint.html)
```
QPoint QPoint.__sub__ (self, QPoint p2)
```
[](qpoint.html)
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- QWebPage Class Reference
- QWebPluginFactory Class Reference
- QWebSecurityOrigin Class Reference
- QWebSettings Class Reference
- QWebView Class Reference
- QWhatsThis Class Reference
- QWhatsThisClickedEvent Class Reference
- QWheelEvent Class Reference
- QWidget Class Reference
- QWidgetAction Class Reference
- QWidgetItem Class Reference
- QWindowStateChangeEvent Class Reference
- QWizard Class Reference
- QWizardPage Class Reference
- QWorkspace Class Reference
- QWriteLocker Class Reference
- QX11EmbedContainer Class Reference
- QX11EmbedWidget Class Reference
- QX11Info Class Reference
- QXmlAttributes Class Reference
- QXmlContentHandler Class Reference
- QXmlDeclHandler Class Reference
- QXmlDefaultHandler Class Reference
- QXmlDTDHandler Class Reference
- QXmlEntityResolver Class Reference
- QXmlErrorHandler Class Reference
- QXmlFormatter Class Reference
- QXmlInputSource Class Reference
- QXmlItem Class Reference
- QXmlLexicalHandler Class Reference
- QXmlLocator Class Reference
- QXmlName Class Reference
- QXmlNamePool Class Reference
- QXmlNamespaceSupport Class Reference
- QXmlNodeModelIndex Class Reference
- QXmlParseException Class Reference
- QXmlQuery Class Reference
- QXmlReader Class Reference
- QXmlResultItems Class Reference
- QXmlSchema Class Reference
- QXmlSchemaValidator Class Reference
- QXmlSerializer Class Reference
- QXmlSimpleReader Class Reference
- QXmlStreamAttribute Class Reference
- QXmlStreamAttributes Class Reference
- QXmlStreamEntityDeclaration Class Reference
- QXmlStreamEntityResolver Class Reference
- QXmlStreamNamespaceDeclaration Class Reference
- QXmlStreamNotationDeclaration Class Reference
- QXmlStreamReader Class Reference
- QXmlStreamWriter Class Reference