def svg(self, filename, rect=None, resolution=72.0, paperColor=None):
"""Create a SVG file for the selected rect or the whole page.
The filename may be a string or a QIODevice object. The rectangle is
relative to our top-left position. Normally vector graphics are
rendered, but in cases where that is not possible, the resolution will
be used to determine the DPI for the generated rendering.
"""
# map to the original page
source = self.pageRect() if rect is None else self.mapFromPage().rect(
rect)
# scale to target size
w = source.width() * self.scaleX
h = source.height() * self.scaleY
if self.computedRotation & 1:
w, h = h, w
targetSize = QSizeF(w, h) * resolution / self.dpi
svg = QSvgGenerator()
if isinstance(filename, str):
svg.setFileName(filename)
else:
svg.setOutputDevice(filename)
svg.setResolution(int(resolution))
svg.setSize(targetSize.toSize())
svg.setViewBox(QRectF(0, 0, targetSize.width(), targetSize.height()))
return self.output(svg, source, paperColor)
def save(self,
path,
filetype=None,
title=None,
description=None,
svg_dpi=SVG_INKSCAPE):
if path is None or not isinstance(path, str):
logger.error('please provide a valide path to save the image "' +
str(path) + '"')
return
if filetype is None:
if path.lower().endswith('.svg'):
filetype = 'svg'
else:
filetype = 'raster'
dpi = 72 # 300 # inkscape 96 ? check for illustrator --> check
if filetype == 'svg':
generator = QSvgGenerator()
generator.setFileName(path)
if svg_dpi == self.SVG_ILLUSTRATOR:
generator.setSize(QSize(595, 842))
generator.setViewBox(QRect(0, 0, 595, 842))
else:
generator.setSize(QSize(794, 1123))
generator.setViewBox(QRect(0, 0, 794, 1123))
if title is not None and isinstance(title, str):
generator.setTitle(title)
if description is not None and isinstance(description, str):
generator.setDescription(description)
generator.setResolution(
svg_dpi
) # fixes issues in inkscape of pt size --> 72 pr illustrator and 96 pr inkscape but need change size
painter = QPainter(generator)
print(generator.title(), generator.heightMM(), generator.height(),
generator.widthMM(), generator.resolution(),
generator.description(), generator.logicalDpiX())
else:
scaling_factor_dpi = 1
scaling_factor_dpi = self.scaling_factor_to_achieve_DPI(300)
image = QtGui.QImage(
QSize(
self.cm_to_inch(21) * dpi * scaling_factor_dpi,
self.cm_to_inch(29.7) * dpi * scaling_factor_dpi),
QtGui.QImage.Format_RGB32)
painter = QPainter(
image) # see what happens in case of rounding of pixels
painter.scale(scaling_factor_dpi, scaling_factor_dpi)
painter.setRenderHint(
QPainter.HighQualityAntialiasing
) # to improve rendering #Antialiasing otherwise or nothing
self.paint(painter)
painter.end()
if filetype != 'svg':
image.save(path)
def exportSvg(self):
"""
For exporting a svg file (text is still too large)
Returns
-------
"""
generator = QSvgGenerator()
generator.setResolution(300)
generator.setSize(
QSize(self.diagramScene.width(), self.diagramScene.height()))
# generator.setViewBox(QRect(0, 0, 800, 800))
generator.setViewBox(self.diagramScene.sceneRect())
generator.setFileName("VectorGraphicsExport.svg")
painter = QPainter()
painter.begin(generator)
painter.setRenderHint(QPainter.Antialiasing)
self.diagramScene.render(painter)
painter.end()
def save(self, path, filetype=None, title=None, description=None, svg_dpi=SVG_INKSCAPE):
if path is None or not isinstance(path, str):
logger.error('please provide a valide path to save the image "' + str(path) + '"')
return
if filetype is None:
if path.lower().endswith('.svg'):
filetype = 'svg'
else:
filetype = os.path.splitext(path)[1]
dpi = 72 # 300 # inkscape 96 ? check for illustrator --> check
if filetype == 'svg':
generator = QSvgGenerator()
generator.setFileName(path)
if svg_dpi == self.SVG_ILLUSTRATOR:
generator.setSize(QSize(595, 842))
generator.setViewBox(QRect(0, 0, 595, 842))
else:
generator.setSize(QSize(794, 1123))
generator.setViewBox(QRect(0, 0, 794, 1123))
if title is not None and isinstance(title, str):
generator.setTitle(title)
if description is not None and isinstance(description, str):
generator.setDescription(description)
generator.setResolution(
svg_dpi) # fixes issues in inkscape of pt size --> 72 pr illustrator and 96 pr inkscape but need change size
painter = QPainter(generator)
# print(generator.title(), generator.heightMM(), generator.height(), generator.widthMM(),
# generator.resolution(), generator.description(), generator.logicalDpiX())
else:
scaling_factor_dpi = 1
scaling_factor_dpi = self.scaling_factor_to_achieve_DPI(300)
# in fact take actual page size ??? multiplied by factor
# just take real image size instead
# image = QtGui.QImage(QSize(self.cm_to_inch(21) * dpi * scaling_factor_dpi, self.cm_to_inch(29.7) * dpi * scaling_factor_dpi), QtGui.QImage.Format_RGBA8888) # minor change to support alpha # QtGui.QImage.Format_RGB32)
# NB THE FOLLOWING LINES CREATE A WEIRD ERROR WITH WEIRD PIXELS DRAWN some sort of lines NO CLUE WHY
img_bounds = self.getBounds()
image = QtGui.QImage(QSize(img_bounds.width() * scaling_factor_dpi, img_bounds.height()* scaling_factor_dpi), QtGui.QImage.Format_RGBA8888) # minor change to support alpha # QtGui.QImage.Format_RGB32)
# print('size at dpi',QSize(img_bounds.width() * scaling_factor_dpi, img_bounds.height()* scaling_factor_dpi))
# QSize(self.cm_to_inch(0.02646 * img_bounds.width())
# self.cm_to_inch(0.02646 * img_bounds.height())
# need convert pixels to inches
# is there a rounding error
# force white bg for non jpg
try:
# print(filetype.lower())
# the tif and png file formats support alpha
if not filetype.lower() == '.png' and not filetype.lower() == '.tif' and not filetype.lower() == '.tiff':
image.fill(QColor.fromRgbF(1,1,1))
else:
# image.fill(QColor.fromRgbF(1, 1, 1, alpha=1))
# image.fill(QColor.fromRgbF(1, 1, 1, alpha=1))
# TODO KEEP in fact image need BE FILLED WITH TRANSPARENT OTHERWISE GETS WEIRD DRAWING ERRORS
# TODO KEEP SEE https://stackoverflow.com/questions/13464627/qt-empty-transparent-qimage-has-noise
# image.fill(qRgba(0, 0, 0, 0))
image.fill(QColor.fromRgbF(0,0,0,0))
except:
pass
painter = QPainter(image) # see what happens in case of rounding of pixels
# painter.begin()
painter.scale(scaling_factor_dpi, scaling_factor_dpi)
painter.setRenderHint(QPainter.HighQualityAntialiasing) # to improve rendering quality
self.paint(painter)
painter.end()
if filetype != 'svg':
image.save(path)
