本文整理汇总了Python中qwt.qt.QtCore.QRectF.isEmpty方法的典型用法代码示例。如果您正苦于以下问题：Python QRectF.isEmpty方法的具体用法？Python QRectF.isEmpty怎么用？Python QRectF.isEmpty使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类qwt.qt.QtCore.QRectF的用法示例。
在下文中一共展示了QRectF.isEmpty方法的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: renderTo
# 需要导入模块: from qwt.qt.QtCore import QRectF [as 别名]
# 或者: from qwt.qt.QtCore.QRectF import isEmpty [as 别名]
def renderTo(self, plot, dest):
"""
Render a plot to a file
Supported formats are:
- pdf: Portable Document Format PDF
- ps: Postcript
- svg: Scalable Vector Graphics SVG
- all image formats supported by Qt, see QImageWriter.supportedImageFormats()
Scalable vector graphic formats like PDF or SVG are superior to
raster graphics formats.
:param qwt.plot.QwtPlot plot: Plot widget
:param str fileName: Path of the file, where the document will be stored
:param str format: Format for the document
:param QSizeF sizeMM: Size for the document in millimeters.
:param int resolution: Resolution in dots per Inch (dpi)
.. seealso::
:py:meth:`renderTo()`, :py:meth:`render()`,
:py:meth:`qwt.painter.QwtPainter.setRoundingAlignment()`
"""
if isinstance(dest, QPaintDevice):
w = dest.width()
h = dest.height()
rect = QRectF(0, 0, w, h)
elif isinstance(dest, QPrinter):
w = dest.width()
h = dest.height()
rect = QRectF(0, 0, w, h)
aspect = rect.width()/rect.height()
if aspect < 1.:
rect.setHeight(aspect*rect.width())
elif isinstance(dest, QSvgGenerator):
rect = dest.viewBoxF()
if rect.isEmpty():
rect.setRect(0, 0, dest.width(), dest.height())
if rect.isEmpty():
rect.setRect(0, 0, 800, 600)
p = QPainter(dest)
self.render(plot, p, rect)示例2: renderTo
# 需要导入模块: from qwt.qt.QtCore import QRectF [as 别名]
# 或者: from qwt.qt.QtCore.QRectF import isEmpty [as 别名]
def renderTo(self, plot, dest):
if isinstance(dest, QPaintDevice):
w = dest.width()
h = dest.height()
rect = QRectF(0, 0, w, h)
elif isinstance(dest, QPrinter):
w = dest.width()
h = dest.height()
rect = QRectF(0, 0, w, h)
aspect = rect.width()/rect.height()
if aspect < 1.:
rect.setHeight(aspect*rect.width())
elif isinstance(dest, QSvgGenerator):
rect = dest.viewBoxF()
if rect.isEmpty():
rect.setRect(0, 0, dest.width(), dest.height())
if rect.isEmpty():
rect.setRect(0, 0, 800, 600)
p = QPainter(dest)
self.render(plot, p, rect)示例3: qwtDrawSvgSymbols
# 需要导入模块: from qwt.qt.QtCore import QRectF [as 别名]
# 或者: from qwt.qt.QtCore.QRectF import isEmpty [as 别名]
def qwtDrawSvgSymbols(painter, points, numPoints, renderer, symbol):
if renderer is None or not renderer.isValid():
return
viewBox = QRectF(renderer.viewBoxF())
if viewBox.isEmpty():
return
sz = QSizeF(symbol.size())
if not sz.isValid():
sz = viewBox.size()
sx = sz.width()/viewBox.width()
sy = sz.height()/viewBox.height()
pinPoint = QPointF(viewBox.center())
if symbol.isPinPointEnabled():
pinPoint = symbol.pinPoint()
dx = sx*(pinPoint.x()-viewBox.left())
dy = sy*(pinPoint.y()-viewBox.top())
for pos in points:
x = pos.x()-dx
y = pos.y()-dy
renderer.render(painter, QRectF(x, y, sz.width(), sz.height()))示例4: qwtDrawGraphicSymbols
# 需要导入模块: from qwt.qt.QtCore import QRectF [as 别名]
# 或者: from qwt.qt.QtCore.QRectF import isEmpty [as 别名]
def qwtDrawGraphicSymbols(painter, points, numPoint, graphic, symbol):
pointRect = QRectF(graphic.controlPointRect())
if pointRect.isEmpty():
return
sx = 1.
sy = 1.
sz = symbol.size()
if sz.isValid():
sx = sz.width()/pointRect.width()
sy = sz.height()/pointRect.height()
pinPoint = QPointF(pointRect.center())
if symbol.isPinPointEnabled():
pinPoint = symbol.pinPoint()
transform = QTransform(painter.transform())
for pos in points:
tr = QTransform(transform)
tr.translate(pos.x(), pos.y())
tr.scale(sx, sy)
tr.translate(-pinPoint.x(), -pinPoint.y())
painter.setTransform(tr)
graphic.render(painter)
painter.setTransform(transform)示例5: boundingRect
# 需要导入模块: from qwt.qt.QtCore import QRectF [as 别名]
# 或者: from qwt.qt.QtCore.QRectF import isEmpty [as 别名]
def boundingRect(self):
"""
Calculate the bounding rectangle for a symbol at position (0,0).
:return: Bounding rectangle
"""
rect = QRectF()
pinPointTranslation = False
if self.__data.style in (QwtSymbol.Ellipse, QwtSymbol.Rect,
QwtSymbol.Hexagon):
pw = 0.
if self.__data.pen.style() != Qt.NoPen:
pw = max([self.__data.pen.widthF(), 1.])
rect.setSize(self.__data.size+QSizeF(pw, pw))
rect.moveCenter(QPointF(0., 0.))
elif self.__data.style in (QwtSymbol.XCross, QwtSymbol.Diamond,
QwtSymbol.Triangle, QwtSymbol.UTriangle,
QwtSymbol.DTriangle, QwtSymbol.RTriangle,
QwtSymbol.LTriangle, QwtSymbol.Star1,
QwtSymbol.Star2):
pw = 0.
if self.__data.pen.style() != Qt.NoPen:
pw = max([self.__data.pen.widthF(), 1.])
rect.setSize(QSizeF(self.__data.size)+QSizeF(2*pw, 2*pw))
rect.moveCenter(QPointF(0., 0.))
elif self.__data.style == QwtSymbol.Path:
if self.__data.path.graphic.isNull():
self.__data.path.graphic = qwtPathGraphic(
self.__data.path.path, self.__data.pen, self.__data.brush)
rect = qwtScaleBoundingRect(self.__data.path.graphic,
self.__data.size)
pinPointTranslation = True
elif self.__data.style == QwtSymbol.Pixmap:
if self.__data.size.isEmpty():
rect.setSize(self.__data.pixmap.pixmap.size())
else:
rect.setSize(self.__data.size)
pinPointTranslation = True
elif self.__data.style == QwtSymbol.Graphic:
rect = qwtScaleBoundingRect(self.__data.graphic.graphic,
self.__data.size)
pinPointTranslation = True
elif self.__data.style == QwtSymbol.SvgDocument:
if self.__data.svg.renderer is not None:
rect = self.__data.svg.renderer.viewBoxF()
if self.__data.size.isValid() and not rect.isEmpty():
sz = QSizeF(rect.size())
sx = self.__data.size.width()/sz.width()
sy = self.__data.size.height()/sz.height()
transform = QTransform()
transform.scale(sx, sy)
rect = transform.mapRect(rect)
pinPointTranslation = True
else:
rect.setSize(self.__data.size)
rect.moveCenter(QPointF(0., 0.))
if pinPointTranslation:
pinPoint = QPointF(0., 0.)
if self.__data.isPinPointEnabled:
pinPoint = rect.center()-self.__data.pinPoint
rect.moveCenter(pinPoint)
r = QRect()
r.setLeft(np.floor(rect.left()))
r.setTop(np.floor(rect.top()))
r.setRight(np.floor(rect.right()))
r.setBottom(np.floor(rect.bottom()))
if self.__data.style != QwtSymbol.Pixmap:
r.adjust(-1, -1, 1, 1)
return r