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feature: Add png for jupyter nb and saving #382

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merged 5 commits into from
Nov 9, 2016
Merged

feature: Add png for jupyter nb and saving #382

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41d43d0
feature: Add png for jupyter nb and saving
giulioungaretti Nov 7, 2016
eba6e95
feature: Add save to all plotters
giulioungaretti Nov 8, 2016
55eab24
feature: Add end_task
giulioungaretti Nov 8, 2016
dff292b
docs: Add save example, use faster refresh rate
giulioungaretti Nov 8, 2016
125c480
fix: Use better variable name, clarify docstring
giulioungaretti Nov 9, 2016
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16 changes: 16 additions & 0 deletions qcodes/plots/pyqtgraph.py
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Original file line number Diff line number Diff line change
Expand Up @@ -382,3 +382,19 @@ def _cmap(self, scale):
values, colors = scale

return self.rpg.ColorMap(values, colors)

def _repr_png_(self):
"""
Create a png representation of the current window.
"""
image = self.win.grab()
byte_array = self.rpg.QtCore.QByteArray()
buffer = self.rpg.QtCore.QBuffer(byte_array)
buffer.open(self.rpg.QtCore.QIODevice.ReadWrite)
image.save(buffer, 'PNG')
buffer.close()
return bytes(byte_array._getValue())
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note to self: this is a gnarly hack IMHO, but then again no other way around.


def save(self, filename=""):
image = self.win.grab()
image.save(filename, "PNG", 0)