I am experiencing a similar issue. I noticed when exporting from the context menu everything works correctly, however, when I export programmatically the scatterplot datapoints are all shifted to the right. Is there a way to use the same mechanism programmatically that the context menu uses?
On Friday, November 21, 2014 at 12:17:53 AM UTC-6, Peter Maunz wrote: > > Hi Luke, > > I am seeing the following bug or issue: > > I am selecting export to png from the context menu and I have a line plot > together with points. > When I leave the width in points at the default given in the gui, > everything works fine. > However, when I choose a different width in points (for example for a > better quality print), then the points do not appear at the right position, > or the points are outside the plot region and are omitted altogether. > I am running pyqtgraph develop 7fa0ce9711bee1a0edb8d0f8a3a615afce90d599 > from 11/14/2014 on windows using WinPython-64bit-2.7.6.4 > I poked around in the source code and found a way to kind of fix it. I > don't claim that is a good way to fix it, I just hope that will make > debugging for you easier. > > Changes: > diff --git a/pyqtgraph/exporters/ImageExporter.py > b/pyqtgraph/exporters/ImageExporter.py > index 78d9310..16922c8 100644 > --- a/pyqtgraph/exporters/ImageExporter.py > +++ b/pyqtgraph/exporters/ImageExporter.py > @@ -77,7 +77,7 @@ class ImageExporter(Exporter): > > ## set resolution of image: > origTargetRect = self.getTargetRect() > - resolutionScale = targetRect.width() / origTargetRect.width() > + resolutionScale = targetRect.width() / > float(origTargetRect.width()) # need float division here > #self.png.setDotsPerMeterX(self.png.dotsPerMeterX() * > resolutionScale) > #self.png.setDotsPerMeterY(self.png.dotsPerMeterY() * > resolutionScale) > > diff --git a/pyqtgraph/graphicsItems/AxisItem.py > b/pyqtgraph/graphicsItems/AxisItem.py > index b125cb7..d6ff608 100644 > --- a/pyqtgraph/graphicsItems/AxisItem.py > +++ b/pyqtgraph/graphicsItems/AxisItem.py > @@ -811,6 +811,8 @@ class AxisItem(GraphicsWidget): > if None in points: > return > lengthInPixels = Point(points[1] - points[0]).length() > + if self._exportOpts and 'resolutionScale' in self._exportOpts: > + lengthInPixels /= self._exportOpts['resolutionScale'] > if lengthInPixels == 0: > return > > diff --git a/pyqtgraph/graphicsItems/GraphicsItem.py > b/pyqtgraph/graphicsItems/GraphicsItem.py > index 2ca3519..b7fc6e0 100644 > --- a/pyqtgraph/graphicsItems/GraphicsItem.py > +++ b/pyqtgraph/graphicsItems/GraphicsItem.py > @@ -102,7 +102,8 @@ class GraphicsItem(object): > Extends deviceTransform to automatically determine the > viewportTransform. > """ > if self._exportOpts is not False and 'painter' in > self._exportOpts: ## currently exporting; device transform may be different. > - return self._exportOpts['painter'].deviceTransform() * > self.sceneTransform() > + scaling = QtGui.QTransform.fromScale( > self._exportOpts['resolutionScale'], self._exportOpts['resolutionScale']) > if 'resolutionScale' in self._exportOpts else QtGui.QTransform.fromScale( > 1,1) > + return self._exportOpts['painter'].deviceTransform() * > self.sceneTransform() * scaling > > if viewportTransform is None: > view = self.getViewWidget() > > With this changes exporting the whole scene works. However, when exporting > less than the whole scene, the points are still off. > > > Thanks very much, > --Peter > -- You received this message because you are subscribed to the Google Groups "pyqtgraph" group. To unsubscribe from this group and stop receiving emails from it, send an email to pyqtgraph+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/pyqtgraph/6eff7d6e-0ebf-4c67-b850-5864f73ec0a1%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
