b78662c33e
- curves enable antialiasing when exporting to image - plotitems hide button during export
69 lines
2.7 KiB
Python
69 lines
2.7 KiB
Python
from Exporter import Exporter
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from pyqtgraph.parametertree import Parameter
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from pyqtgraph.Qt import QtGui, QtCore, QtSvg
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import re
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__all__ = ['SVGExporter']
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class SVGExporter(Exporter):
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Name = "Scalable Vector Graphics (SVG)"
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def __init__(self, item):
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Exporter.__init__(self, item)
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tr = self.getTargetRect()
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self.params = Parameter(name='params', type='group', children=[
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{'name': 'width', 'type': 'float', 'value': tr.width(), 'limits': (0, None)},
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{'name': 'height', 'type': 'float', 'value': tr.height(), 'limits': (0, None)},
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])
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self.params.param('width').sigValueChanged.connect(self.widthChanged)
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self.params.param('height').sigValueChanged.connect(self.heightChanged)
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def widthChanged(self):
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sr = self.getSourceRect()
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ar = sr.height() / sr.width()
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self.params.param('height').setValue(self.params['width'] * ar, blockSignal=self.heightChanged)
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def heightChanged(self):
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sr = self.getSourceRect()
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ar = sr.width() / sr.height()
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self.params.param('width').setValue(self.params['height'] * ar, blockSignal=self.widthChanged)
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def parameters(self):
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return self.params
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def export(self, fileName=None):
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if fileName is None:
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self.fileSaveDialog(filter="Scalable Vector Graphics (*.svg)")
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return
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self.svg = QtSvg.QSvgGenerator()
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self.svg.setFileName(fileName)
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self.svg.setSize(QtCore.QSize(100,100))
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#self.svg.setResolution(600)
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#self.svg.setViewBox()
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targetRect = QtCore.QRect(0, 0, self.params['width'], self.params['height'])
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sourceRect = self.getSourceRect()
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painter = QtGui.QPainter(self.svg)
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try:
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self.setExportMode(True)
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self.render(painter, QtCore.QRectF(targetRect), sourceRect)
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finally:
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self.setExportMode(False)
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painter.end()
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## Workaround to set pen widths correctly
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data = open(fileName).readlines()
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for i in range(len(data)):
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line = data[i]
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m = re.match(r'(<g .*)stroke-width="1"(.*transform="matrix\(([^\)]+)\)".*)', line)
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if m is not None:
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#print "Matched group:", line
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g = m.groups()
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matrix = map(float, g[2].split(','))
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#print "matrix:", matrix
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scale = max(abs(matrix[0]), abs(matrix[3]))
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if scale == 0 or scale == 1.0:
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continue
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data[i] = g[0] + ' stroke-width="%0.2g" ' % (1.0/scale) + g[1] + '\n'
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#print "old line:", line
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#print "new line:", data[i]
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open(fileName, 'w').write(''.join(data))
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