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SVG export fixes

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This commit is contained in:
Luke Campagnola 2012-12-26 13:48:12 -05:00
parent 49e2177623
commit 51e88bd436
3 changed files with 121 additions and 47 deletions
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6
examples/__main__.py
View File

@ -166,7 +166,7 @@ def buildFileList(examples, files=None):
buildFileList(val, files)
return files
def testFile(name, f, exe, lib, graphicsSystem):
def testFile(name, f, exe, lib, graphicsSystem=None):
global path
fn = os.path.join(path,f)
#print "starting process: ", fn
@ -194,8 +194,8 @@ except:
print("test failed")
raise
""" % (import1, import2, graphicsSystem)
#print code
""" % (import1, graphicsSystem, import2)
process = subprocess.Popen(['exec %s -i' % (exe)], shell=True, stdin=subprocess.PIPE, stderr=subprocess.PIPE, stdout=subprocess.PIPE)
process.stdin.write(code.encode('UTF-8'))
#process.stdin.close()

106
pyqtgraph/exporters/SVGExporter.py
View File

@ -153,7 +153,7 @@ def _generateItemSvg(item, nodes=None, root=None):
if root is None:
root = item
## Skip hidden items
if hasattr(item, 'isVisible') and not item.isVisible():
return None
@ -171,10 +171,10 @@ def _generateItemSvg(item, nodes=None, root=None):
doc = xml.parseString(xmlStr)
else:
childs = item.childItems()
if isinstance(root, QtGui.QGraphicsScene):
tr = item.sceneTransform()
else:
tr = item.itemTransform(root)
tr = itemTransform(item, root)
#print item, pg.SRTTransform(tr)
#tr.translate(item.pos().x(), item.pos().y())
#tr = tr * item.transform()
arr = QtCore.QByteArray()
@ -248,7 +248,7 @@ def _generateItemSvg(item, nodes=None, root=None):
if isinstance(root, QtGui.QGraphicsScene):
path = QtGui.QGraphicsPathItem(item.mapToScene(item.shape()))
else:
path = QtGui.QGraphicsPathItem(item.mapToItem(root, item.shape()))
path = QtGui.QGraphicsPathItem(root.mapToParent(item.mapToItem(root, item.shape())))
pathNode = _generateItemSvg(path, root=root).getElementsByTagName('path')[0]
## and for the clipPath element
clip = name + '_clip'
@ -306,6 +306,7 @@ def correctCoordinates(node, item):
ch.setAttribute('d', newCoords)
elif ch.tagName == 'text':
removeTransform = False
## leave text alone for now. Might need this later to correctly render text with outline.
#c = np.array([
#[float(ch.getAttribute('x')), float(ch.getAttribute('y'))],
#[float(ch.getAttribute('font-size')), 0],
@ -318,32 +319,82 @@ def correctCoordinates(node, item):
#ch.setAttribute('font-size', str(fs))
else:
print('warning: export not implemented for SVG tag %s (from item %s)' % (ch.tagName, item))
## correct line widths if needed
if removeTransform and ch.getAttribute('vector-effect') != 'non-scaling-stroke':
w = float(grp.getAttribute('stroke-width'))
s = pg.transformCoordinates(tr, np.array([[w,0], [0,0]]), transpose=True)
w = ((s[0]-s[1])**2).sum()**0.5
ch.setAttribute('stroke-width', str(w))
if removeTransform:
grp.removeAttribute('transform')
def correctStroke(node, item, root, width=1):
#print "==============", item, node
if node.hasAttribute('stroke-width'):
width = float(node.getAttribute('stroke-width'))
if node.getAttribute('vector-effect') == 'non-scaling-stroke':
node.removeAttribute('vector-effect')
if isinstance(root, QtGui.QGraphicsScene):
w = item.mapFromScene(pg.Point(width,0))
o = item.mapFromScene(pg.Point(0,0))
else:
w = item.mapFromItem(root, pg.Point(width,0))
o = item.mapFromItem(root, pg.Point(0,0))
w = w-o
#print " ", w, o, w-o
w = (w.x()**2 + w.y()**2) ** 0.5
#print " ", w
node.setAttribute('stroke-width', str(w))
def itemTransform(item, root):
## Return the transformation mapping item to root
## (actually to parent coordinate system of root)
for ch in node.childNodes:
if isinstance(ch, xml.Element):
correctStroke(ch, item, root, width)
if item is root:
tr = QtGui.QTransform()
tr.translate(*item.pos())
tr = tr * item.transform()
return tr
if int(item.flags() & item.ItemIgnoresTransformations) > 0:
pos = item.pos()
parent = item.parentItem()
if parent is not None:
pos = itemTransform(parent, root).map(pos)
tr = QtGui.QTransform()
tr.translate(pos.x(), pos.y())
tr = item.transform() * tr
else:
## find next parent that is either the root item or
## an item that ignores its transformation
nextRoot = item
while True:
nextRoot = nextRoot.parentItem()
if nextRoot is None:
nextRoot = root
break
if nextRoot is root or int(nextRoot.flags() & nextRoot.ItemIgnoresTransformations) > 0:
break
if isinstance(nextRoot, QtGui.QGraphicsScene):
tr = item.sceneTransform()
else:
tr = itemTransform(nextRoot, root) * item.itemTransform(nextRoot)[0]
#pos = QtGui.QTransform()
#pos.translate(root.pos().x(), root.pos().y())
#tr = pos * root.transform() * item.itemTransform(root)[0]
return tr
#def correctStroke(node, item, root, width=1):
##print "==============", item, node
#if node.hasAttribute('stroke-width'):
#width = float(node.getAttribute('stroke-width'))
#if node.getAttribute('vector-effect') == 'non-scaling-stroke':
#node.removeAttribute('vector-effect')
#if isinstance(root, QtGui.QGraphicsScene):
#w = item.mapFromScene(pg.Point(width,0))
#o = item.mapFromScene(pg.Point(0,0))
#else:
#w = item.mapFromItem(root, pg.Point(width,0))
#o = item.mapFromItem(root, pg.Point(0,0))
#w = w-o
##print " ", w, o, w-o
#w = (w.x()**2 + w.y()**2) ** 0.5
##print " ", w
#node.setAttribute('stroke-width', str(w))
#for ch in node.childNodes:
#if isinstance(ch, xml.Element):
#correctStroke(ch, item, root, width)
def cleanXml(node):
## remove extraneous text; let the xml library do the formatting.
@ -359,4 +410,5 @@ def cleanXml(node):
if hasElement:
for ch in nonElement:
node.removeChild(ch)
elif node.tagName == 'g': ## remove childless groups
node.parentNode.removeChild(node)

56
tests/svg.py
View File

@ -6,26 +6,40 @@ import pyqtgraph as pg
app = pg.mkQApp()
class SVGTest(test.TestCase):
def test_plotscene(self):
pg.setConfigOption('foreground', (0,0,0))
w = pg.GraphicsWindow()
w.show()
p1 = w.addPlot()
p2 = w.addPlot()
p1.plot([1,3,2,3,1,6,9,8,4,2,3,5,3], pen={'color':'k'})
p1.setXRange(0,5)
p2.plot([1,5,2,3,4,6,1,2,4,2,3,5,3], pen={'color':'k', 'cosmetic':False, 'width': 0.3})
app.processEvents()
app.processEvents()
#def test_plotscene(self):
#pg.setConfigOption('foreground', (0,0,0))
#w = pg.GraphicsWindow()
#w.show()
#p1 = w.addPlot()
#p2 = w.addPlot()
#p1.plot([1,3,2,3,1,6,9,8,4,2,3,5,3], pen={'color':'k'})
#p1.setXRange(0,5)
#p2.plot([1,5,2,3,4,6,1,2,4,2,3,5,3], pen={'color':'k', 'cosmetic':False, 'width': 0.3})
#app.processEvents()
#app.processEvents()
ex = pg.exporters.SVGExporter.SVGExporter(w.scene())
ex.export(fileName='test.svg')
#ex = pg.exporters.SVGExporter.SVGExporter(w.scene())
#ex.export(fileName='test.svg')
#def test_simple(self):
def test_simple(self):
scene = pg.QtGui.QGraphicsScene()
#rect = pg.QtGui.QGraphicsRectItem(0, 0, 100, 100)
#scene.addItem(rect)
#rect.setPos(20,20)
#rect.translate(50, 50)
#rect.rotate(30)
#grp = pg.ItemGroup()
#rect.scale(0.5, 0.5)
#rect1 = pg.QtGui.QGraphicsRectItem(0, 0, 100, 100)
#rect1.setParentItem(rect)
#rect1.setFlag(rect1.ItemIgnoresTransformations)
#rect1.setPos(20, 20)
#rect1.scale(2,2)
#el1 = pg.QtGui.QGraphicsEllipseItem(0, 0, 100, 100)
#el1.setParentItem(rect1)
##grp = pg.ItemGroup()
#grp.setParentItem(rect)
#grp.translate(200,0)
##grp.rotate(30)
@ -40,8 +54,16 @@ class SVGTest(test.TestCase):
#el.scale(0.5,2)
#el.setParentItem(rect2)
#ex = pg.exporters.SVGExporter.SVGExporter(rect)
#ex.export(fileName='test.svg')
grp2 = pg.ItemGroup()
scene.addItem(grp2)
grp2.scale(100,100)
rect3 = pg.QtGui.QGraphicsRectItem(0,0,2,2)
rect3.setPen(pg.mkPen(width=1, cosmetic=False))
grp2.addItem(rect3)
ex = pg.exporters.SVGExporter.SVGExporter(scene)
ex.export(fileName='test.svg')
if __name__ == '__main__':