def paintEvent(self, event):
if self.__pixmap.isNull():
return
sourcerect = QRect(QPoint(0, 0), self.__pixmap.size())
pixsize = QSizeF(self.__pixmap.size())
rect = self.contentsRect()
pixsize.scale(QSizeF(rect.size()), Qt.KeepAspectRatio)
targetrect = QRectF(QPointF(0, 0), pixsize)
targetrect.moveCenter(QPointF(rect.center()))
painter = QPainter(self)
painter.setRenderHint(QPainter.SmoothPixmapTransform)
painter.drawPixmap(targetrect, self.__pixmap, QRectF(sourcerect))
painter.end()
def paintEvent(self, event):
if self.__pixmap.isNull():
return
sourcerect = QRect(QPoint(0, 0), self.__pixmap.size())
pixsize = QSizeF(self.__pixmap.size())
rect = self.contentsRect()
pixsize.scale(QSizeF(rect.size()), Qt.KeepAspectRatio)
targetrect = QRectF(QPointF(0, 0), pixsize)
targetrect.moveCenter(QPointF(rect.center()))
painter = QPainter(self)
painter.setRenderHint(QPainter.SmoothPixmapTransform)
painter.drawPixmap(targetrect, self.__pixmap, QRectF(sourcerect))
painter.end()
def grab_svg(scene):
# type: (QGraphicsScene) -> str
"""
Return a SVG rendering of the scene contents.
Parameters
----------
scene : :class:`CanvasScene`
"""
svg_buffer = QBuffer()
gen = _QSvgGenerator()
gen.setOutputDevice(svg_buffer)
items_rect = scene.itemsBoundingRect().adjusted(-10, -10, 10, 10)
if items_rect.isNull():
items_rect = QRectF(0, 0, 10, 10)
width, height = items_rect.width(), items_rect.height()
rect_ratio = float(width) / height
# Keep a fixed aspect ratio.
aspect_ratio = 1.618
if rect_ratio > aspect_ratio:
height = int(height * rect_ratio / aspect_ratio)
else:
width = int(width * aspect_ratio / rect_ratio)
target_rect = QRectF(0, 0, width, height)
source_rect = QRectF(0, 0, width, height)
source_rect.moveCenter(items_rect.center())
gen.setSize(target_rect.size().toSize())
gen.setViewBox(target_rect)
painter = QPainter(gen)
# Draw background.
painter.setPen(Qt.NoPen)
painter.setBrush(scene.palette().base())
painter.drawRect(target_rect)
# Render the scene
scene.render(painter, target_rect, source_rect)
painter.end()
buffer_str = bytes(svg_buffer.buffer())
return buffer_str.decode("utf-8")
def grab_svg(scene):
"""
Return a SVG rendering of the scene contents.
Parameters
----------
scene : :class:`CanvasScene`
"""
from AnyQt.QtSvg import QSvgGenerator
svg_buffer = QBuffer()
gen = QSvgGenerator()
gen.setOutputDevice(svg_buffer)
items_rect = scene.itemsBoundingRect().adjusted(-10, -10, 10, 10)
if items_rect.isNull():
items_rect = QRectF(0, 0, 10, 10)
width, height = items_rect.width(), items_rect.height()
rect_ratio = float(width) / height
# Keep a fixed aspect ratio.
aspect_ratio = 1.618
if rect_ratio > aspect_ratio:
height = int(height * rect_ratio / aspect_ratio)
else:
width = int(width * aspect_ratio / rect_ratio)
target_rect = QRectF(0, 0, width, height)
source_rect = QRectF(0, 0, width, height)
source_rect.moveCenter(items_rect.center())
gen.setSize(target_rect.size().toSize())
gen.setViewBox(target_rect)
painter = QPainter(gen)
# Draw background.
painter.setBrush(QBrush(Qt.white))
painter.drawRect(target_rect)
# Render the scene
scene.render(painter, target_rect, source_rect)
painter.end()
buffer_str = bytes(svg_buffer.buffer())
return buffer_str.decode("utf-8")
def path_toQtPath(geom):
p = QPainterPath()
anchor, points = geom
if len(points) > 1:
p.moveTo(*points[0])
for (x, y) in points[1:]:
p.lineTo(x, y)
elif len(points) == 1:
r = QRectF(0, 0, 1e-0, 1e-9)
r.moveCenter(*points[0])
p.addRect(r)
elif len(points) == 0:
r = QRectF(0, 0, 1e-16, 1e-16)
r.moveCenter(QPointF(*anchor))
p.addRect(r)
return p
def paint(self, painter, option, widget=0):
if self._pixmap.isNull():
return
rect = self.contentsRect()
pixsize = QSizeF(self._pixmap.size())
aspectmode = (Qt.KeepAspectRatio if self._keepAspect
else Qt.IgnoreAspectRatio)
pixsize.scale(rect.size(), aspectmode)
pixrect = QRectF(QPointF(0, 0), pixsize)
pixrect.moveCenter(rect.center())
painter.save()
painter.setPen(QPen(QColor(0, 0, 0, 50), 3))
painter.drawRoundedRect(pixrect, 2, 2)
painter.setRenderHint(QPainter.SmoothPixmapTransform)
source = QRectF(QPointF(0, 0), QSizeF(self._pixmap.size()))
painter.drawPixmap(pixrect, self._pixmap, source)
painter.restore()
def paint(self, painter, option, widget=0):
if self._pixmap.isNull():
return
rect = self.contentsRect()
pixsize = QSizeF(self._pixmap.size())
aspectmode = (Qt.KeepAspectRatio
if self._keepAspect else Qt.IgnoreAspectRatio)
pixsize.scale(rect.size(), aspectmode)
pixrect = QRectF(QPointF(0, 0), pixsize)
pixrect.moveCenter(rect.center())
painter.save()
painter.setPen(QPen(QColor(0, 0, 0, 50), 3))
painter.drawRoundedRect(pixrect, 2, 2)
painter.setRenderHint(QPainter.SmoothPixmapTransform)
source = QRectF(QPointF(0, 0), QSizeF(self._pixmap.size()))
painter.drawPixmap(pixrect, self._pixmap, source)
painter.restore()
def qrect_aligned_to(
rect_a: QRectF, rect_b: QRectF, alignment: Qt.Alignment) -> QRectF:
res = QRectF(rect_a)
valign = alignment & Qt.AlignVertical_Mask
halign = alignment & Qt.AlignHorizontal_Mask
if valign == Qt.AlignTop:
res.moveTop(rect_b.top())
if valign == Qt.AlignVCenter:
res.moveCenter(QPointF(res.center().x(), rect_b.center().y()))
if valign == Qt.AlignBottom:
res.moveBottom(rect_b.bottom())
if halign == Qt.AlignLeft:
res.moveLeft(rect_b.left())
if halign == Qt.AlignHCenter:
res.moveCenter(QPointF(rect_b.center().x(), res.center().y()))
if halign == Qt.AlignRight:
res.moveRight(rect_b.right())
return res
def paint(self, painter, option, widget=0):
if self._pixmap.isNull():
return
rect = self.contentsRect()
pixsize = QSizeF(self._pixmap.size())
aspectmode = (Qt.KeepAspectRatio
if self._keepAspect else Qt.IgnoreAspectRatio)
if self._crop:
height, width = pixsize.height(), pixsize.width()
diff = abs(height - width)
if height > width:
y, x = diff / 2, 0
h, w = height - diff, width
else:
x, y = diff / 2, 0
w, h = width - diff, height
source = QRectF(x, y, w, h)
pixrect = QRectF(QPointF(0, 0), rect.size())
else:
source = QRectF(QPointF(0, 0), pixsize)
pixsize.scale(rect.size(), aspectmode)
pixrect = QRectF(QPointF(0, 0), pixsize)
if self._subset:
painter.setOpacity(1.0)
else:
painter.setOpacity(0.35)
pixrect.moveCenter(rect.center())
painter.save()
painter.setPen(QPen(QColor(0, 0, 0, 50), 3))
painter.drawRoundedRect(pixrect, 2, 2)
painter.setRenderHint(QPainter.SmoothPixmapTransform)
painter.drawPixmap(pixrect, self._pixmap, source)
painter.restore()
def paint(self, painter, option, widget=0):
if self._pixmap.isNull():
return
rect = self.contentsRect()
pixsize = QSizeF(self._pixmap.size())
aspectmode = (Qt.KeepAspectRatio if self._keepAspect else Qt.IgnoreAspectRatio)
if self._crop:
height, width = pixsize.height(), pixsize.width()
diff = abs(height - width)
if height > width:
y, x = diff / 2, 0
h, w = height - diff, width
else:
x, y = diff / 2, 0
w, h = width - diff, height
source = QRectF(x, y, w, h)
pixrect = QRectF(QPointF(0, 0), rect.size())
else:
source = QRectF(QPointF(0, 0), pixsize)
pixsize.scale(rect.size(), aspectmode)
pixrect = QRectF(QPointF(0, 0), pixsize)
if self._subset:
painter.setOpacity(1.0)
else:
painter.setOpacity(0.35)
pixrect.moveCenter(rect.center())
painter.save()
painter.setPen(QPen(QColor(0, 0, 0, 50), 3))
painter.drawRoundedRect(pixrect, 2, 2)
painter.setRenderHint(QPainter.SmoothPixmapTransform)
painter.drawPixmap(pixrect, self._pixmap, source)
painter.restore()
