1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
import numpy as np
import pyqtgraph as pg
import pyqtgraph.functions as fn
from pyqtgraph.exporters import ImageExporter
from pyqtgraph.Qt import QtGui
app = pg.mkQApp()
def test_ImageExporter_filename_dialog():
"""Tests ImageExporter code path that opens a file dialog. Regression test
for pull request 1133."""
p = pg.PlotWidget()
p.show()
exp = ImageExporter(p.getPlotItem())
exp.export()
def test_ImageExporter_toBytes():
p = pg.PlotWidget()
p.show()
p.hideAxis('bottom')
p.hideAxis('left')
exp = ImageExporter(p.getPlotItem())
qimg = exp.export(toBytes=True)
qimg = qimg.convertToFormat(QtGui.QImage.Format.Format_RGBA8888)
data = fn.ndarray_from_qimage(qimg)
black = (0, 0, 0, 255)
assert np.all(data == black), "Exported image should be entirely black."
|
