# QPoint Class Reference
## [[QtCore](index.htm) module]
該QPoint類定義使用整數精度在平面上的一個點。[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
這個類可以醃制。
該QPoint類定義使用整數精度在平面上的一個點。
被指定的點由斧頭協調和使用y坐標可接的[x](qpoint.html#x)()和[y](qpoint.html#y)()函數。該[isNull](qpoint.html#isNull)如果x和y都設置為0 ()函數返回真。坐標可以使用設置(或改變)的[setX](qpoint.html#setX)()和[setY](qpoint.html#setY)()函數,或者在[rx](qpoint.html#rx)()和[ry](qpoint.html#ry)( ),它返回引用到坐標(允許直接操作)等功能。
給定一個點_p_,下面的語句是等價的:
```
QPoint p;
p.setX(p.x() + 1);
p += QPoint(1, 0);
p.rx()++;
```
甲QPoint對象也可以被用作載體:加法和減法的定義為矢量(每個組分單獨加入) 。一個QPoint對象也可以通過分頻或倍頻`int`或`qreal`。
此外, QPoint類提供[manhattanLength](qpoint.html#manhattanLength)()函數,它給出了QPoint物體的長度的一種廉價的近似解釋為一個向量。最后,相比QPoint對象可以被串流播放,以及。
* * *
## Method Documentation
```
QPoint.__init__ (self)
```
構造一個零點,即坐標為( 0,0)
**See also** [isNull](qpoint.html#isNull)( ) 。
```
QPoint.__init__ (self, int?xpos, int?ypos)
```
構造一個點與給定的坐標(_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坐標都設置為0 ,否則返回False 。
```
int QPoint.manhattanLength (self)
```
返回的絕對值之和[x](qpoint.html#x)()和[y](qpoint.html#y)( ) ,傳統上被稱為“曼哈頓長度”從原點的向量的點。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
}
```
這是一個有用的,快速的計算,近似真實的長度:
```
double trueLength = sqrt(pow(x(), 2) + pow(y(), 2));
```
“曼哈頓長度”的傳統產生,是因為這樣的距離適用于旅客誰只能行駛在矩形網格,就像曼哈頓的大街上。
```
QPoint.setX (self, int?xpos)
```
設置該點的x坐標,以給定的_x_協調。
**See also** [x](qpoint.html#x)()和[setY](qpoint.html#setY)( ) 。
```
QPoint.setY (self, int?ypos)
```
設置該點的y坐標為給定的_y_協調。
**See also** [y](qpoint.html#y)()和[setX](qpoint.html#setX)( ) 。
```
int QPoint.x (self)
```
返回該點的x坐標。
**See also** [setX](qpoint.html#setX)()和[rx](qpoint.html#rx)( ) 。
```
int QPoint.y (self)
```
返回此點的y坐標。
**See also** [setY](qpoint.html#setY)()和[ry](qpoint.html#ry)( ) 。
```
QPoint __mul__ (self, QMatrix?m)
```
[
如果QtGui模塊導入此方法僅適用。
](qpoint.html)
```
QPoint __mul__ (self, QMatrix4x4?matrix)
```
[
如果QtGui模塊導入此方法僅適用。
](qpoint.html)
```
QPoint __mul__ (self, QTransform?m)
```
[
如果QtGui模塊導入此方法僅適用。
](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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- QVector4D Class Reference
- QVideoFrame Class Reference
- QVideoSurfaceFormat Class Reference
- QWaitCondition Class Reference
- QWebDatabase Class Reference
- QWebElement Class Reference
- QWebElementCollection Class Reference
- QWebFrame Class Reference
- QWebHistory Class Reference
- QWebHistoryInterface Class Reference
- QWebHistoryItem Class Reference
- QWebHitTestResult Class Reference
- QWebInspector Class Reference
- 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