QPolygonF Class Reference · PyQt4 中文文档

# QPolygonF Class Reference ## [[QtGui](index.htm) module] 该QPolygonF类提供了使用浮点精度点的矢量。[More...](#details) ### Methods * `__init__ (self)` * `__init__ (self, QPolygonF a)` * `__init__ (self, list-of-QPointF v)` * `__init__ (self, QRectF r)` * `__init__ (self, QPolygon a)` * `__init__ (self, int asize)` * `append (self, QPointF value)` * `QPointF at (self, int i)` * `QRectF boundingRect (self)` * `clear (self)` * `bool contains (self, QPointF value)` * `bool containsPoint (self, QPointF pt, Qt.FillRule fillRule)` * `int count (self, QPointF value)` * `int count (self)` * `sip.voidptr data (self)` * `fill (self, QPointF value, int size = -1)` * `QPointF first (self)` * `int indexOf (self, QPointF value, int from = 0)` * `insert (self, int i, QPointF value)` * `QPolygonF intersected (self, QPolygonF r)` * `bool isClosed (self)` * `bool isEmpty (self)` * `QPointF last (self)` * `int lastIndexOf (self, QPointF value, int from = -1)` * `QPolygonF mid (self, int pos, int length = -1)` * `prepend (self, QPointF value)` * `remove (self, int i)` * `remove (self, int i, int count)` * `replace (self, int i, QPointF value)` * `int size (self)` * `QPolygonF subtracted (self, QPolygonF r)` * `swap (self, QPolygonF other)` * `QPolygon toPolygon (self)` * `translate (self, QPointF offset)` * `translate (self, float dx, float dy)` * `QPolygonF translated (self, QPointF offset)` * `QPolygonF translated (self, float dx, float dy)` * `QPolygonF united (self, QPolygonF r)` * `QPointF value (self, int i)` * `QPointF value (self, int i, QPointF defaultValue)` ### Special Methods * `QPolygonF __add__ (self, QPolygonF other)` * `int __contains__ (self, QPointF value)` * `__delitem__ (self, int i)` * `__delitem__ (self, slice slice)` * `bool __eq__ (self, QPolygonF other)` * `QPointF __getitem__ (self, int i)` * `QPolygonF __getitem__ (self, slice slice)` * `QPolygonF __iadd__ (self, QPolygonF other)` * `QPolygonF __iadd__ (self, QPointF value)` * `__len__ (self)` * `object __lshift__ (self, QPointF value)` * `QPolygonF __mul__ (self, QMatrix m)` * `QPolygonF __mul__ (self, QTransform m)` * `bool __ne__ (self, QPolygonF other)` * `__setitem__ (self, int i, QPointF value)` * `__setitem__ (self, slice slice, QPolygonF list)` * * * ## Detailed Description 该QPolygonF类提供了使用浮点精度点的矢量。一个QPolygonF是[QVector](index.htm)\u003c[QPointF](qpointf.html)\u003e 。把点添加到QPolygonF最简单的方法是使用它的流媒体运营商，如下图所示： ``` QPolygonF polygon; polygon << [QPointF](qpointf.html)(10.4, 20.5) << [QPointF](qpointf.html)(20.2, 30.2); ``` 除了由所提供的功能[QVector](index.htm)， QPolygonF提供[boundingRect](qpolygonf.html#boundingRect)（）和[translate](qpolygonf.html#translate)（）用于几何运算功能。使用[QMatrix.map](qmatrix.html#map)（）函数QPolygonFs的更一般的变换。 QPolygonF还提供了[isClosed](qpolygonf.html#isClosed)（）函数来确定一个多边形的起点和终点是否是相同的，并且[toPolygon](qpolygonf.html#toPolygon)（）函数返回此多边形的整数精度副本。该QPolygonF类是[implicitly shared](index.htm#implicit-data-sharing)。 * * * ## Method Documentation ``` QPolygonF.__init__ (self) ``` 构造一个多边形，没有分。 **See also** [QVector.isEmpty](index.htm#isEmpty)（）。 ``` QPolygonF.__init__ (self, QPolygonF a) ``` 构造的给定的多边形_size_。创建空的多边形，如果_size_== 0 。 **See also** [QVector.isEmpty](index.htm#isEmpty)（）。 ``` QPolygonF.__init__ (self, list-of-QPointF v) ``` 构造给定的一个副本_polygon_。 ``` QPolygonF.__init__ (self, QRectF r) ``` 构建了含有指定一个多边形_points_。 ``` QPolygonF.__init__ (self, QPolygon a) ``` 构造一个封闭的多边形从指定的_rectangle_。多边形包含四个顶点按顺时针顺序矩形的开始，并与左上顶点结束。 **See also** [isClosed](qpolygonf.html#isClosed)（）。 ``` QPolygonF.__init__ (self, int asize) ``` 构造从指定的整数根据一个基于浮动多边形_polygon_。 **See also** [toPolygon](qpolygonf.html#toPolygon)（）。 ``` QPolygonF.append (self, QPointF value) ``` ``` QPointF QPolygonF.at (self, int i) ``` [](qpointf.html) ``` QRectF QPolygonF.boundingRect (self) ``` [](qrectf.html) [返回多边形的边界矩形，或](qrectf.html)[QRectF](qrectf.html)（0,0,0,0），如果多边形是空的。 **See also** [QVector.isEmpty](index.htm#isEmpty)（）。 ``` QPolygonF.clear (self) ``` ``` bool QPolygonF.contains (self, QPointF value) ``` ``` bool QPolygonF.containsPoint (self, QPointF pt, Qt.FillRule fillRule) ``` 返回True如果给定的_point_在多边形内根据指定的_fillRule_否则返回False 。此功能被引入Qt的4.3 。 ``` int QPolygonF.count (self, QPointF value) ``` ``` int QPolygonF.count (self) ``` ``` sip.voidptr QPolygonF.data (self) ``` ``` QPolygonF.fill (self, QPointF value, int size = -1) ``` ``` QPointF QPolygonF.first (self) ``` [ ``` int QPolygonF.indexOf (self, QPointF value, int from = 0) ``` ``` QPolygonF.insert (self, int i, QPointF value) ``` ](qpointf.html) ``` QPolygonF QPolygonF.intersected (self, QPolygonF r) ``` [ 返回一个多边形是这个多边形的交点_r_。对多边形集合运算将视作为多边形区域。非封闭的多边形将被隐式关闭处理。此功能被引入Qt的4.3 。 ``` bool QPolygonF.isClosed (self) ``` 返回True如果多边形是封闭的，否则返回False 。多边形被认为是封闭的，如果起点和终点都是平等的。 ](qpolygonf.html) [**See also**](qpolygonf.html) [QVector.first](index.htm#first)（）和[QVector.last](index.htm#last)（）。 ``` bool QPolygonF.isEmpty (self) ``` ``` QPointF QPolygonF.last (self) ``` [ ``` int QPolygonF.lastIndexOf (self, QPointF value, int from = -1) ``` ](qpointf.html) ``` QPolygonF QPolygonF.mid (self, int pos, int length = -1) ``` [ ``` QPolygonF.prepend (self, QPointF value) ``` ``` QPolygonF.remove (self, int i) ``` ``` QPolygonF.remove (self, int i, int count) ``` ``` QPolygonF.replace (self, int i, QPointF value) ``` ``` int QPolygonF.size (self) ``` ](qpolygonf.html) ``` QPolygonF QPolygonF.subtracted (self, QPolygonF r) ``` [ 返回一个多边形是_r_减去这个多边形。对多边形集合运算将视作为多边形区域。非封闭的多边形将被隐式关闭处理。此功能被引入Qt的4.3 。 ``` QPolygonF.swap (self, QPolygonF other) ``` 掉期多边形_other_与此多边形。这个操作是非常快的，而且永远不会。此功能被引入Qt的4.8 。 ](qpolygonf.html) ``` QPolygon QPolygonF.toPolygon (self) ``` [](qpolygon.html) [创建并返回一个](qpolygon.html)[QPolygon](qpolygon.html)把每个[QPointF](qpointf.html)到[QPoint](qpoint.html)。 **See also** [QPointF.toPoint](qpointf.html#toPoint)（）。 ``` QPolygonF.translate (self, QPointF offset) ``` 翻译所有点在多边形由给定的_offset_。 **See also** [translated](qpolygonf.html#translated)（）。 ``` QPolygonF.translate (self, float dx, float dy) ``` 这是一个重载函数。由（将所有的点在多边形_dx_，_dy_）。 **See also** [translated](qpolygonf.html#translated)（）。 ``` QPolygonF QPolygonF.translated (self, QPointF offset) ``` [ 返回该多边形的一个副本，是由给定的翻译_offset_。此功能被引入Qt的4.6 。 ](qpolygonf.html) [**See also**](qpolygonf.html) [translate](qpolygonf.html#translate)（）。 ``` QPolygonF QPolygonF.translated (self, float dx, float dy) ``` [ 这是一个重载函数。返回由（翻译多边形的副本_dx_，_dy_）。此功能被引入Qt的4.6 。 ](qpolygonf.html) [**See also**](qpolygonf.html) [translate](qpolygonf.html#translate)（）。 ``` QPolygonF QPolygonF.united (self, QPolygonF r) ``` [ 返回一个多边形是这个多边形和工会_r_。对多边形集合运算将视作为多边形区域。非封闭的多边形将被隐式关闭处理。此功能被引入Qt的4.3 。 ](qpolygonf.html) [**See also**](qpolygonf.html) [intersected](qpolygonf.html#intersected)（）和[subtracted](qpolygonf.html#subtracted)（）。 ``` QPointF QPolygonF.value (self, int i) ``` [](qpointf.html) ``` QPointF QPolygonF.value (self, int i, QPointF defaultValue) ``` [](qpointf.html) ``` QPolygonF QPolygonF.__add__ (self, QPolygonF other) ``` [ ``` int QPolygonF.__contains__ (self, QPointF value) ``` ``` QPolygonF.__delitem__ (self, int i) ``` ``` QPolygonF.__delitem__ (self, slice slice) ``` ``` bool QPolygonF.__eq__ (self, QPolygonF other) ``` ](qpolygonf.html) ``` QPointF QPolygonF.__getitem__ (self, int i) ``` [](qpointf.html) ``` QPolygonF QPolygonF.__getitem__ (self, slice slice) ``` [](qpolygonf.html) ``` QPolygonF QPolygonF.__iadd__ (self, QPolygonF other) ``` [](qpolygonf.html) ``` QPolygonF QPolygonF.__iadd__ (self, QPointF value) ``` [ ``` QPolygonF.__len__ (self) ``` ``` object QPolygonF.__lshift__ (self, QPointF value) ``` ](qpolygonf.html) ``` QPolygonF QPolygonF.__mul__ (self, QMatrix m) ``` [](qpolygonf.html) ``` QPolygonF QPolygonF.__mul__ (self, QTransform m) ``` [ ``` bool QPolygonF.__ne__ (self, QPolygonF other) ``` ``` QPolygonF.__setitem__ (self, int i, QPointF value) ``` ``` QPolygonF.__setitem__ (self, slice slice, QPolygonF list) ``` ](qpolygonf.html)