# QRectF Class Reference
## [[QtCore](index.htm) module]
该QRectF类定义使用浮点精度在平面的矩形。[More...](#details)
### Methods
* `__init__ (self)`
* `__init__ (self, QPointF atopLeft, QSizeF asize)`
* `__init__ (self, QPointF atopLeft, QPointF abottomRight)`
* `__init__ (self, float aleft, float atop, float awidth, float aheight)`
* `__init__ (self, QRect r)`
* `__init__ (self, QRectF)`
* `adjust (self, float xp1, float yp1, float xp2, float yp2)`
* `QRectF adjusted (self, float xp1, float yp1, float xp2, float yp2)`
* `float bottom (self)`
* `QPointF bottomLeft (self)`
* `QPointF bottomRight (self)`
* `QPointF center (self)`
* `bool contains (self, QPointF p)`
* `bool contains (self, QRectF r)`
* `bool contains (self, float ax, float ay)`
* `(float xp1, float yp1, float xp2, float yp2) getCoords (self)`
* `(float ax, float ay, float aaw, float aah) getRect (self)`
* `float height (self)`
* `QRectF intersect (self, QRectF r)`
* `QRectF intersected (self, QRectF r)`
* `bool intersects (self, QRectF r)`
* `bool isEmpty (self)`
* `bool isNull (self)`
* `bool isValid (self)`
* `float left (self)`
* `moveBottom (self, float pos)`
* `moveBottomLeft (self, QPointF p)`
* `moveBottomRight (self, QPointF p)`
* `moveCenter (self, QPointF p)`
* `moveLeft (self, float pos)`
* `moveRight (self, float pos)`
* `moveTo (self, float ax, float ay)`
* `moveTo (self, QPointF p)`
* `moveTop (self, float pos)`
* `moveTopLeft (self, QPointF p)`
* `moveTopRight (self, QPointF p)`
* `QRectF normalized (self)`
* `float right (self)`
* `setBottom (self, float pos)`
* `setBottomLeft (self, QPointF p)`
* `setBottomRight (self, QPointF p)`
* `setCoords (self, float xp1, float yp1, float xp2, float yp2)`
* `setHeight (self, float ah)`
* `setLeft (self, float pos)`
* `setRect (self, float ax, float ay, float aaw, float aah)`
* `setRight (self, float pos)`
* `setSize (self, QSizeF s)`
* `setTop (self, float pos)`
* `setTopLeft (self, QPointF p)`
* `setTopRight (self, QPointF p)`
* `setWidth (self, float aw)`
* `setX (self, float pos)`
* `setY (self, float pos)`
* `QSizeF size (self)`
* `QRect toAlignedRect (self)`
* `float top (self)`
* `QPointF topLeft (self)`
* `QPointF topRight (self)`
* `QRect toRect (self)`
* `translate (self, float dx, float dy)`
* `translate (self, QPointF p)`
* `QRectF translated (self, float dx, float dy)`
* `QRectF translated (self, QPointF p)`
* `QRectF unite (self, QRectF r)`
* `QRectF united (self, QRectF r)`
* `float width (self)`
* `float x (self)`
* `float y (self)`
### Special Methods
* `QRectF __and__ (self, QRectF r)`
* `int __bool__ (self)`
* `int __contains__ (self, QPointF p)`
* `int __contains__ (self, QRectF r)`
* `bool __eq__ (self, QRectF r2)`
* `QRectF __iand__ (self, QRectF r)`
* `QRectF __ior__ (self, QRectF r)`
* `bool __ne__ (self, QRectF r2)`
* `QRectF __or__ (self, QRectF r)`
* `str __repr__ (self)`
* * *
## Detailed Description
这个类可以醃制。
该QRectF类定义使用浮点精度在平面的矩形。
一个矩形,通常表示为左上角和尺寸。一个QRectF的大小(宽度和高度)总是等于其形成的基础,它呈现的数学矩形。
甲QRectF可以用一组左,上,宽度和高度的整数,或者从一个被构造[QPoint](qpoint.html)和[QSize](qsize.html)。下面的代码创建两个相同的矩形。
```
QRectF r1(100, 200, 11, 16);
QRectF r2([QPoint](qpoint.html)(100, 200), [QSize](qsize.html)(11, 16));
```
还有一个第三个构造函数从创建QRectF[QRect](qrect.html)和一个相应[toRect](qrectf.html#toRect)( )函数返回一个[QRect](qrect.html)在此基础上矩形的值的对象(注意,在返回的矩形的坐标被四舍五入到最接近的整数。)
该QRectF类提供了返回的各种矩形坐标函数的集合,使操纵这些。 QRectF还提供功能,以矩形相对移动到不同的坐标。此外,还有一个[moveTo](qrectf.html#moveTo)( )函数,移动矩形,留下它的左上角在给定的坐标。或者,所述[translate](qrectf.html#translate)()函数使矩形给定的偏移量相对于当前位置,并且[translated](qrectf.html#translated)( )函数返回这个矩形的翻译件。
该[size](qrectf.html#size)( )函数返回rectange的尺寸为[QSize](qsize.html)。的尺寸也可以单独使用检索到的[width](qrectf.html#width)()和[height](qrectf.html#height)()函数。操控方面使用[setSize](qrectf.html#setSize)( )[setWidth](qrectf.html#setWidth)()或[setHeight](qrectf.html#setHeight)()函数。可替换地,大小可以通过应用或功能设定矩形的坐标,例如被改变,[setBottom](qrectf.html#setBottom)()或[setRight](qrectf.html#setRight)( ) 。
该[contains](qrectf.html#contains)( )函数告诉一个给定的点是否是里面的矩形或没有了,[intersects](qrectf.html#intersects)如果这个矩形相交与给定的矩形( )函数返回True (否则返回False ) 。该QRectF类还提供了[intersected](qrectf.html#intersected)()函数返回相交的矩形,并在[united](qrectf.html#united)( )函数将返回一个封装给定的矩形,这个矩形:
| ![](https://img.kancloud.cn/e0/a0/e0a03a0e18572320a0097d9c7000ed3c_432x249.png) | ![](https://img.kancloud.cn/29/ba/29bacfa860c80646716736b9ac9155ef_353x227.png) |
| [intersected](qrectf.html#intersected)() | [united](qrectf.html#united)() |
该[isEmpty](qrectf.html#isEmpty)如果该矩形的宽度或高度小于或等于,大于0 , ()函数返回真。需要注意的是一个空矩形是无效的:在[isValid](qrectf.html#isValid)如果宽度和高度大于0 ( )函数返回True。一个空矩形([isNull](qrectf.html#isNull)()== TRUE) ,另一方面,也将宽度和高度设置为0。
注意,由于该方法[QRect](qrect.html)和QRectF定义,一个空QRectF在本质上以同样的方式定义为[QRect](qrect.html)。
最后,相比QRectF对象可以被串流播放,以及。
### Rendering
当使用一个[anti-aliased](qpainter.html#RenderHint-enum)画家, QRectF的边界线将对称地在数学矩形的边界线的两侧呈现。但使用一个别名画家(默认值)时,其他规则。
然后,用一个像素宽的画笔绘制时QRectF的边界线将呈现给正确的和数学矩形的边界线下方。
当与两个像素宽画笔绘制边界线会由数学矩形被分割在中间。这将是这种情况时的笔被设置成偶数个像素,而与像素数为奇数的笔绘制,备用像素将呈现向右和数学矩形中的一个像素的情况下。
| ![](https://img.kancloud.cn/e6/12/e612d9715e7aa5f6b8f474807087cc4e_333x249.png) | ![](https://img.kancloud.cn/6f/35/6f357f1bb2266cefaed5d688375622a0_333x249.png) |
| Logical representation | One pixel wide pen |
| ![](https://img.kancloud.cn/7c/43/7c4328010c71ede5cbb74b2d5a14227a_333x249.png) | ![](https://img.kancloud.cn/a7/21/a721bf4df51438a662d26c47b27706e5_333x249.png) |
| Two pixel wide pen | Three pixel wide pen |
### Coordinates
该QRectF类提供了返回的各种矩形坐标函数的集合,使操纵这些。 QRectF还提供功能,以矩形相对移动到不同的坐标。
例如:[bottom](qrectf.html#bottom)( )[setBottom](qrectf.html#setBottom)()和[moveBottom](qrectf.html#moveBottom)( )函数:[bottom](qrectf.html#bottom)()返回矩形的底边的y坐标,[setBottom](qrectf.html#setBottom)()设置矩形的底边给定的y坐标(它可能会改变高度,但决不会改变矩形的顶边)和[moveBottom](qrectf.html#moveBottom)( )移动整个矩形垂直,使矩形的底边在给定的y坐标和尺寸不变。
![](https://img.kancloud.cn/60/70/6070c44f07350221a4b299ac12d7b562_537x294.png)
另外,也可以使用偏移量添加到该矩形的坐标[adjust](qrectf.html#adjust)()函数,以及检索使用基于原来的1调整一个新的矩形的[adjusted](qrectf.html#adjusted)()函数。如果其中的宽度和高度为负时,用[normalized](qrectf.html#normalized)()函数来检索其中的角部被交换的矩形。
此外, QRectF提供[getCoords](qrectf.html#getCoords)()函数,其提取的矩形的左上角和右下角的位置,并且[getRect](qrectf.html#getRect)( )函数,它提取矩形的左上角,宽度和高度。使用[setCoords](qrectf.html#setCoords)()和[setRect](qrectf.html#setRect)( )函数来处理矩形的坐标和尺寸一气呵成。
* * *
## Method Documentation
```
QRectF.__init__ (self)
```
构造一个空矩形。
**See also** [isNull](qrectf.html#isNull)( ) 。
```
QRectF.__init__ (self, QPointF atopLeft, QSizeF asize)
```
构造一个矩形与给定_topLeft_角部和所述定_size_。
**See also** [setTopLeft](qrectf.html#setTopLeft)()和[setSize](qrectf.html#setSize)( ) 。
```
QRectF.__init__ (self, QPointF atopLeft, QPointF abottomRight)
```
构造一个矩形与给定_topLeft_和_bottomRight_角落。
此功能被引入Qt的4.3 。
**See also** [setTopLeft](qrectf.html#setTopLeft)()和[setBottomRight](qrectf.html#setBottomRight)( ) 。
```
QRectF.__init__ (self, float aleft, float atop, float awidth, float aheight)
```
构造一个矩形(_x_,_y_)作为它的左上角和给定的_width_和_height_。
**See also** [setRect](qrectf.html#setRect)( ) 。
```
QRectF.__init__ (self, QRect r)
```
构造一个[QRectF](qrectf.html)从给定的矩形[QRect](qrect.html) _rectangle_。
**See also** [toRect](qrectf.html#toRect)( ) 。
```
QRectF.__init__ (self, QRectF)
```
```
QRectF.adjust (self, float xp1, float yp1, float xp2, float yp2)
```
添加_dx1_,_dy1_,_dx2_和_dy2_分别以矩形的现有的坐标。
**See also** [adjusted](qrectf.html#adjusted)()和[setRect](qrectf.html#setRect)( ) 。
```
QRectF QRectF.adjusted (self, float xp1, float yp1, float xp2, float yp2)
```
[
返回一个新的矩形_dx1_,_dy1_,_dx2_和_dy2_分别加入到这个矩形的现有坐标。
](qrectf.html)
[**See also**](qrectf.html) [adjust](qrectf.html#adjust)( ) 。
```
float QRectF.bottom (self)
```
返回矩形的底边的y坐标。
**See also** [setBottom](qrectf.html#setBottom)( )[bottomLeft](qrectf.html#bottomLeft)()和[bottomRight](qrectf.html#bottomRight)( ) 。
```
QPointF QRectF.bottomLeft (self)
```
[
返回矩形的左下角的位置。
](qpointf.html)
[**See also**](qpointf.html) [setBottomLeft](qrectf.html#setBottomLeft)( )[bottom](qrectf.html#bottom)()和[left](qrectf.html#left)( ) 。
```
QPointF QRectF.bottomRight (self)
```
[
返回矩形的右下角的位置。
](qpointf.html)
[**See also**](qpointf.html) [setBottomRight](qrectf.html#setBottomRight)( )[bottom](qrectf.html#bottom)()和[right](qrectf.html#right)( ) 。
```
QPointF QRectF.center (self)
```
[
返回矩形的中心点。
](qpointf.html)
[**See also**](qpointf.html) [moveCenter](qrectf.html#moveCenter)( ) 。
```
bool QRectF.contains (self, QPointF p)
```
返回True如果给定的_point_是内部或矩形的边缘,否则返回False 。
**See also** [intersects](qrectf.html#intersects)( ) 。
```
bool QRectF.contains (self, QRectF r)
```
这是一个重载函数。
返回True如果点(_x_,_y_)是内部或矩形的边缘,否则返回False 。
```
bool QRectF.contains (self, float ax, float ay)
```
这是一个重载函数。
返回True如果给定的_rectangle_是这个矩形里面,否则返回False 。
```
(float xp1, float yp1, float xp2, float yp2) QRectF.getCoords (self)
```
提取矩形的左上角的位置*_x1_和*_y1_和右下角为*的位置_x2_和*_y2_。
**See also** [setCoords](qrectf.html#setCoords)()和[getRect](qrectf.html#getRect)( ) 。
```
(float ax, float ay, float aaw, float aah) QRectF.getRect (self)
```
提取矩形的左上角的位置*_x_和*_y_,其尺寸*_width_和*_height_。
**See also** [setRect](qrectf.html#setRect)()和[getCoords](qrectf.html#getCoords)( ) 。
```
float QRectF.height (self)
```
返回该矩形的高度。
**See also** [setHeight](qrectf.html#setHeight)( )[width](qrectf.html#width)()和[size](qrectf.html#size)( ) 。
```
QRectF QRectF.intersect (self, QRectF r)
```
[](qrectf.html)
```
QRectF QRectF.intersected (self, QRectF r)
```
[
返回此矩形的交集和给定的_rectangle_。需要注意的是`r.intersected(s)`相当于`r & s`。
![](https://img.kancloud.cn/e0/a0/e0a03a0e18572320a0097d9c7000ed3c_432x249.png)
这个函数中引入了Qt 4.2中。
](qrectf.html)
[**See also**](qrectf.html) [intersects](qrectf.html#intersects)( )[united](qrectf.html#united)()和[operator&=](qrectf.html#operator-and-eq)( ) 。
```
bool QRectF.intersects (self, QRectF r)
```
如果这个矩形相交与给定的,则返回True_rectangle_(即它们之间有重叠的非空白区域) ,否则返回False 。
相交的矩形可使用检索到的[intersected](qrectf.html#intersected)()函数。
**See also** [contains](qrectf.html#contains)( ) 。
```
bool QRectF.isEmpty (self)
```
返回True如果矩形为空,否则返回False 。
一个空矩形有[width](qrectf.html#width)()\u003c = 0或[height](qrectf.html#height)()\u003c = 0 。一个空矩形是无效的(即,参考isEmpty ( ) == ![isValid](qrectf.html#isValid)())。
使用[normalized](qrectf.html#normalized)()函数来检索其中的角部被交换的矩形。
**See also** [isNull](qrectf.html#isNull)( )[isValid](qrectf.html#isValid)()和[normalized](qrectf.html#normalized)( ) 。
```
bool QRectF.isNull (self)
```
返回True如果矩形为空矩形,否则返回False 。
空矩形具有的宽度和高度设置为0。一个空的矩形也是空的,因此无效。
**See also** [isEmpty](qrectf.html#isEmpty)()和[isValid](qrectf.html#isValid)( ) 。
```
bool QRectF.isValid (self)
```
返回True如果矩形是有效的,否则返回False 。
一个有效的矩形有一个[width](qrectf.html#width)()\u003e 0和[height](qrectf.html#height)()\u003e 0 。请注意,就像十字路口不平凡的操作没有定义无效矩形。一个有效的矩形不为空(即参考isValid ( ) == ![isEmpty](qrectf.html#isEmpty)())。
**See also** [isNull](qrectf.html#isNull)( )[isEmpty](qrectf.html#isEmpty)()和[normalized](qrectf.html#normalized)( ) 。
```
float QRectF.left (self)
```
返回矩形的左边缘的x坐标。相当于[x](qrectf.html#x)( ) 。
**See also** [setLeft](qrectf.html#setLeft)( )[topLeft](qrectf.html#topLeft)()和[bottomLeft](qrectf.html#bottomLeft)( ) 。
```
QRectF.moveBottom (self, float pos)
```
移动矩形垂直,使矩形的底边在给定的_y_协调。矩形的尺寸是不变的。
**See also** [bottom](qrectf.html#bottom)( )[setBottom](qrectf.html#setBottom)()和[moveTop](qrectf.html#moveTop)( ) 。
```
QRectF.moveBottomLeft (self, QPointF p)
```
移动矩形,留下左下角在给定的_position_。矩形的尺寸是不变的。
**See also** [setBottomLeft](qrectf.html#setBottomLeft)( )[moveBottom](qrectf.html#moveBottom)()和[moveLeft](qrectf.html#moveLeft)( ) 。
```
QRectF.moveBottomRight (self, QPointF p)
```
移动矩形,留下右下角的定_position_。矩形的尺寸是不变的。
**See also** [setBottomRight](qrectf.html#setBottomRight)( )[moveBottom](qrectf.html#moveBottom)()和[moveRight](qrectf.html#moveRight)( ) 。
```
QRectF.moveCenter (self, QPointF p)
```
移动矩形,而使中心点在给定的_position_。矩形的尺寸是不变的。
**See also** [center](qrectf.html#center)( ) 。
```
QRectF.moveLeft (self, float pos)
```
水平移动矩形,使矩形的左边缘在给定的_x_协调。矩形的尺寸是不变的。
**See also** [left](qrectf.html#left)( )[setLeft](qrectf.html#setLeft)()和[moveRight](qrectf.html#moveRight)( ) 。
```
QRectF.moveRight (self, float pos)
```
水平移动矩形,使矩形的右边缘在给定的_x_协调。矩形的尺寸是不变的。
**See also** [right](qrectf.html#right)( )[setRight](qrectf.html#setRight)()和[moveLeft](qrectf.html#moveLeft)( ) 。
```
QRectF.moveTo (self, float ax, float ay)
```
移动矩形,留下左上角的指定位置(_x_,_y_) 。矩形的尺寸是不变的。
**See also** [translate](qrectf.html#translate)()和[moveTopLeft](qrectf.html#moveTopLeft)( ) 。
```
QRectF.moveTo (self, QPointF p)
```
这是一个重载函数。
移动矩形,留下左上角在给定的_position_。
```
QRectF.moveTop (self, float pos)
```
移动矩形垂直,使矩形的顶线在给定的_y_协调。矩形的尺寸是不变的。
**See also** [top](qrectf.html#top)( )[setTop](qrectf.html#setTop)()和[moveBottom](qrectf.html#moveBottom)( ) 。
```
QRectF.moveTopLeft (self, QPointF p)
```
移动矩形,留下左上角在给定的_position_。矩形的尺寸是不变的。
**See also** [setTopLeft](qrectf.html#setTopLeft)( )[moveTop](qrectf.html#moveTop)()和[moveLeft](qrectf.html#moveLeft)( ) 。
```
QRectF.moveTopRight (self, QPointF p)
```
移动矩形,留下右上角的定_position_。矩形的尺寸是不变的。
**See also** [setTopRight](qrectf.html#setTopRight)( )[moveTop](qrectf.html#moveTop)()和[moveRight](qrectf.html#moveRight)( ) 。
```
QRectF QRectF.normalized (self)
```
[
返回一个归一化的矩形,即,具有一个非负的宽度和高度的矩形。
](qrectf.html)
[If](qrectf.html) [width](qrectf.html#width)()\u003c 0的函数交换的左右角部,并且交换的顶部和底部边角,如果[height](qrectf.html#height)()\u003c 0 。
**See also** [isValid](qrectf.html#isValid)()和[isEmpty](qrectf.html#isEmpty)( ) 。
```
float QRectF.right (self)
```
返回矩形的右边缘的x坐标。
**See also** [setRight](qrectf.html#setRight)( )[topRight](qrectf.html#topRight)()和[bottomRight](qrectf.html#bottomRight)( ) 。
```
QRectF.setBottom (self, float pos)
```
设置的矩形的底部边缘与给定的_y_协调。可能会改变高度,但决不会改变矩形的上边缘。
**See also** [bottom](qrectf.html#bottom)()和[moveBottom](qrectf.html#moveBottom)( ) 。
```
QRectF.setBottomLeft (self, QPointF p)
```
设置矩形的左下角给定的_position_。可以改变大小,但决不会改变矩形的右上角。
**See also** [bottomLeft](qrectf.html#bottomLeft)()和[moveBottomLeft](qrectf.html#moveBottomLeft)( ) 。
```
QRectF.setBottomRight (self, QPointF p)
```
设置矩形的右下角为给定的_position_。可以改变大小,但决不会改变矩形的左上角。
**See also** [bottomRight](qrectf.html#bottomRight)()和[moveBottomRight](qrectf.html#moveBottomRight)( ) 。
```
QRectF.setCoords (self, float xp1, float yp1, float xp2, float yp2)
```
设置矩形的左上角的坐标为(_x1_,_y1_)和其右下角的坐标(_x2_,_y2_) 。
**See also** [getCoords](qrectf.html#getCoords)()和[setRect](qrectf.html#setRect)( ) 。
```
QRectF.setHeight (self, float ah)
```
设置了矩形的高度为给定的_height_。底部边缘被改变,但不顶一个。
**See also** [height](qrectf.html#height)()和[setSize](qrectf.html#setSize)( ) 。
```
QRectF.setLeft (self, float pos)
```
设置了矩形的左边缘到给定的_x_协调。可能会改变宽度,但决不会改变矩形的右边缘。
相当于[setX](qrectf.html#setX)( ) 。
**See also** [left](qrectf.html#left)()和[moveLeft](qrectf.html#moveLeft)( ) 。
```
QRectF.setRect (self, float ax, float ay, float aaw, float aah)
```
设置矩形的左上角的坐标为(_x_,_y_) ,并且其大小为给定的_width_和_height_。
**See also** [getRect](qrectf.html#getRect)()和[setCoords](qrectf.html#setCoords)( ) 。
```
QRectF.setRight (self, float pos)
```
设置了矩形的右边缘到给定的_x_协调。可能会改变宽度,但决不会改变矩形的左边缘。
**See also** [right](qrectf.html#right)()和[moveRight](qrectf.html#moveRight)( ) 。
```
QRectF.setSize (self, QSizeF s)
```
设置了矩形的大小给定的_size_。在左上角不移动。
**See also** [size](qrectf.html#size)( )[setWidth](qrectf.html#setWidth)()和[setHeight](qrectf.html#setHeight)( ) 。
```
QRectF.setTop (self, float pos)
```
设置了矩形的顶边到给定的_y_协调。可能会改变高度,但决不会改变矩形的底边。
相当于[setY](qrectf.html#setY)( ) 。
**See also** [top](qrectf.html#top)()和[moveTop](qrectf.html#moveTop)( ) 。
```
QRectF.setTopLeft (self, QPointF p)
```
设置的矩形的左上角的给定_position_。可以改变大小,但决不会改变矩形的右下角。
**See also** [topLeft](qrectf.html#topLeft)()和[moveTopLeft](qrectf.html#moveTopLeft)( ) 。
```
QRectF.setTopRight (self, QPointF p)
```
设置矩形的右上角,以给定的_position_。可以改变大小,但决不会改变矩形的左下角。
**See also** [topRight](qrectf.html#topRight)()和[moveTopRight](qrectf.html#moveTopRight)( ) 。
```
QRectF.setWidth (self, float aw)
```
设置了矩形的宽度与给定_width_。右边缘被改变,但不是左1 。
**See also** [width](qrectf.html#width)()和[setSize](qrectf.html#setSize)( ) 。
```
QRectF.setX (self, float pos)
```
设置了矩形的左边缘到给定的_x_协调。可能会改变宽度,但决不会改变矩形的右边缘。
相当于[setLeft](qrectf.html#setLeft)( ) 。
**See also** [x](qrectf.html#x)( )[setY](qrectf.html#setY)()和[setTopLeft](qrectf.html#setTopLeft)( ) 。
```
QRectF.setY (self, float pos)
```
设置了矩形的顶边到给定的_y_协调。可能会改变高度,但决不会改变矩形的底边。
相当于[setTop](qrectf.html#setTop)( ) 。
**See also** [y](qrectf.html#y)( )[setX](qrectf.html#setX)()和[setTopLeft](qrectf.html#setTopLeft)( ) 。
```
QSizeF QRectF.size (self)
```
[
返回矩形的大小。
](qsizef.html)
[**See also**](qsizef.html) [setSize](qrectf.html#setSize)( )[width](qrectf.html#width)()和[height](qrectf.html#height)( ) 。
```
QRect QRectF.toAlignedRect (self)
```
[](qrect.html)
[返回](qrect.html)[QRect](qrect.html)基于这个矩形是可能的最小整数矩形完全包含此矩形的值。
此功能被引入Qt的4.3 。
**See also** [toRect](qrectf.html#toRect)( ) 。
```
float QRectF.top (self)
```
返回矩形的上边缘的y坐标。相当于[y](qrectf.html#y)( ) 。
**See also** [setTop](qrectf.html#setTop)( )[topLeft](qrectf.html#topLeft)()和[topRight](qrectf.html#topRight)( ) 。
```
QPointF QRectF.topLeft (self)
```
[
返回矩形的左上角的位置。
](qpointf.html)
[**See also**](qpointf.html) [setTopLeft](qrectf.html#setTopLeft)( )[top](qrectf.html#top)()和[left](qrectf.html#left)( ) 。
```
QPointF QRectF.topRight (self)
```
[
返回矩形的右上角的位置。
](qpointf.html)
[**See also**](qpointf.html) [setTopRight](qrectf.html#setTopRight)( )[top](qrectf.html#top)()和[right](qrectf.html#right)( ) 。
```
QRect QRectF.toRect (self)
```
[](qrect.html)
[返回](qrect.html)[QRect](qrect.html)在此基础上矩形的值。请注意,在返回的矩形坐标四舍五入到最接近的整数。
**See also** [QRectF](qrectf.html#QRectF)()和[toAlignedRect](qrectf.html#toAlignedRect)( ) 。
```
QRectF.translate (self, float dx, float dy)
```
移动矩形_dx_沿x轴和_dy_沿着y轴,相对于当前位置。正值移动矩形向右,向下。
**See also** [moveTopLeft](qrectf.html#moveTopLeft)( )[moveTo](qrectf.html#moveTo)()和[translated](qrectf.html#translated)( ) 。
```
QRectF.translate (self, QPointF p)
```
这是一个重载函数。
移动矩形_offset_。[x()](qpointf.html#x)沿x轴和_offset_。[y()](qpointf.html#y)沿着y轴,相对于当前位置。
```
QRectF QRectF.translated (self, float dx, float dy)
```
[
返回矩形的副本被翻译_dx_沿x轴和_dy_沿着y轴,相对于当前位置。正值移动矩形向右和向下。
](qrectf.html)
[**See also**](qrectf.html) [translate](qrectf.html#translate)( ) 。
```
QRectF QRectF.translated (self, QPointF p)
```
[
这是一个重载函数。
](qrectf.html)
[返回矩形的副本被翻译_offset_。](qrectf.html)[x()](qpointf.html#x)沿x轴和_offset_。[y()](qpointf.html#y)沿着y轴,相对于当前位置。
```
QRectF QRectF.unite (self, QRectF r)
```
[](qrectf.html)
```
QRectF QRectF.united (self, QRectF r)
```
[
返回此矩形的边框和给定_rectangle_。
![](https://img.kancloud.cn/29/ba/29bacfa860c80646716736b9ac9155ef_353x227.png)
这个函数中引入了Qt 4.2中。
](qrectf.html)
[**See also**](qrectf.html) [intersected](qrectf.html#intersected)( ) 。
```
float QRectF.width (self)
```
返回矩形的宽度。
**See also** [setWidth](qrectf.html#setWidth)( )[height](qrectf.html#height)()和[size](qrectf.html#size)( ) 。
```
float QRectF.x (self)
```
返回矩形的左边缘的x坐标。相当于[left](qrectf.html#left)( ) 。
**See also** [setX](qrectf.html#setX)( )[y](qrectf.html#y)()和[topLeft](qrectf.html#topLeft)( ) 。
```
float QRectF.y (self)
```
返回矩形的上边缘的y坐标。相当于[top](qrectf.html#top)( ) 。
**See also** [setY](qrectf.html#setY)( )[x](qrectf.html#x)()和[topLeft](qrectf.html#topLeft)( ) 。
```
QRectF QRectF.__and__ (self, QRectF r)
```
[
```
int QRectF.__bool__ (self)
```
```
int QRectF.__contains__ (self, QPointF p)
```
```
int QRectF.__contains__ (self, QRectF r)
```
```
bool QRectF.__eq__ (self, QRectF r2)
```
](qrectf.html)
```
QRectF QRectF.__iand__ (self, QRectF r)
```
[](qrectf.html)
```
QRectF QRectF.__ior__ (self, QRectF r)
```
[
```
bool QRectF.__ne__ (self, QRectF r2)
```
](qrectf.html)
```
QRectF QRectF.__or__ (self, QRectF r)
```
[
```
str QRectF.__repr__ (self)
```
](qrectf.html)
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- QSvgWidget Class Reference
- QSwipeGesture Class Reference
- QSyntaxHighlighter Class Reference
- QSysInfo Class Reference
- QSystemLocale Class Reference
- QSystemSemaphore Class Reference
- QSystemTrayIcon Class Reference
- Qt Class Reference
- QTabBar Class Reference
- QTabletEvent Class Reference
- QTableView Class Reference
- QTableWidget Class Reference
- QTableWidgetItem Class Reference
- QTableWidgetSelectionRange Class Reference
- QTabWidget Class Reference
- QTapAndHoldGesture Class Reference
- QTapGesture Class Reference
- QTcpServer Class Reference
- QTcpSocket Class Reference
- QTemporaryFile Class Reference
- QTest Class Reference
- QTextBlock Class Reference
- QTextBlockFormat Class Reference
- QTextBlockGroup Class Reference
- QTextBlockUserData Class Reference
- QTextBoundaryFinder Class Reference
- QTextBrowser Class Reference
- QTextCharFormat Class Reference
- QTextCodec Class Reference
- QTextCursor Class Reference
- QTextDecoder Class Reference
- QTextDocument Class Reference
- QTextDocumentFragment Class Reference
- QTextDocumentWriter Class Reference
- QTextEdit Class Reference
- QTextEncoder Class Reference
- QTextFormat Class Reference
- QTextFragment Class Reference
- QTextFrame Class Reference
- QTextFrameFormat Class Reference
- QTextImageFormat Class Reference
- QTextInlineObject Class Reference
- QTextItem Class Reference
- QTextLayout Class Reference
- QTextLength Class Reference
- QTextLine Class Reference
- QTextList Class Reference
- QTextListFormat Class Reference
- QTextObject Class Reference
- QTextObjectInterface Class Reference
- QTextOption Class Reference
- QTextStream Class Reference
- QTextTable Class Reference
- QTextTableCell Class Reference
- QTextTableCellFormat Class Reference
- QTextTableFormat Class Reference
- QThread Class Reference
- QThreadPool Class Reference
- QTime Class Reference
- QTimeEdit Class Reference
- QTimeLine Class Reference
- QTimer Class Reference
- QTimerEvent Class Reference
- QToolBar Class Reference
- QToolBox Class Reference
- QToolButton Class Reference
- QToolTip Class Reference
- QTouchEvent Class Reference
- Reference
- QTransform Class Reference
- QTranslator Class Reference
- QTreeView Class Reference
- QTreeWidget Class Reference
- QTreeWidgetItem Class Reference
- QTreeWidgetItemIterator Class Reference
- QUdpSocket Class Reference
- QUndoCommand Class Reference
- QUndoGroup Class Reference
- QUndoStack Class Reference
- QUndoView Class Reference
- QUrl Class Reference
- QUrlInfo Class Reference
- QUuid Class Reference
- QValidator Class Reference
- QVariant Class Reference
- QVariantAnimation Class Reference
- QVBoxLayout Class Reference
- QVector2D Class Reference
- QVector3D Class Reference
- 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