Hello all,
I'm making a user interface for my lab's micrographs using QT and I'm
trying to incorporate pyqtgraph as it seems to be much faster than
matplotlib.
That being said, what I am trying to accomplish is to have groups of images
synchronized on their z axis. I have a MainWindow class with a slider, and
when the slider moves, I am trying to get multiple ImageItems to set their
image to the corresponding frame. Here is the code I have right now (pared
down to what is relevant)
import pickle
import sys
import pyqtgraph as pg
from PyQt5 import QtWidgets, QtCore
from pyqtgraph import GraphicsLayoutWidget, ImageItem
from gui.gui_pyqtgraph import Ui_MainWindow
class ImageGridWidget(GraphicsLayoutWidget):
def __init__(self, experiment, **kwargs):
super(ImageGridWidget, self).__init__(**kwargs)
self.experiment = experiment
self.frame = 0
self.wavelengths = self.experiment.midline_map.keys()
self.image_items = {
wvl:
ImageItem(image=self.experiment.rot_fl.sel(wavelength=wvl).data[self.frame],
border='w')
for wvl in self.wavelengths
}
self.image_viewboxes = {}
for i, (wvl, image_item) in enumerate(self.image_items.items()):
if (i > 0) and (i % 2 == 0):
self.nextRow()
self.image_viewboxes[wvl] = self.addViewBox(name=wvl)
self.image_viewboxes[wvl].addItem(self.image_items[wvl])
self.image_viewboxes[wvl].setAspectLocked(True)
def set_frame(self, frame):
self.frame = frame
for wvl in self.wavelengths:
self.image_items[wvl].setImage(self.experiment.rot_fl.sel(wavelength=wvl).data[self.frame])
class MainWindow(QtWidgets.QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.ui = Ui_MainWindow()
self.ui.setupUi(self)
self.frame = 0
self.experiment =
pickle.load(open('/Users/sean/code/wormAnalysis/data/experiment.pickle', 'rb'))
self.ui.horizontalSlider.setMinimum(0)
self.ui.horizontalSlider.setMaximum(self.experiment.raw_image_data.shape[0] - 1)
self.ui.horizontalSlider.valueChanged.connect(self.handle_slider_changed)
# Set up images
self.rot_image_grid = ImageGridWidget(self.experiment)
self.ui.rotatedImagesBox.layout().addWidget(ImageGridWidget(self.experiment))
# Event Handlers
self.ui.horizontalSlider.valueChanged.connect(self.handle_slider_changed)
def handle_slider_changed(self):
self.frame = int(self.ui.horizontalSlider.value())
self.ui.label.setText(str(self.frame))
self.rot_image_grid.set_frame(self.frame)
if __name__ == '__main__':
pg.setConfigOption('imageAxisOrder', 'row-major')
qapp = QtWidgets.QApplication([])
qapp.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling)
window = MainWindow()
window.show()
qapp.exec_()
The problem I am having is that the ImageItems inside the ImageGridWidget
do not update. They display correctly at startup. I have verified that the
set_frame method is being called on the slider update with the correct
frame using print statements. Does anyone have any insight as to what could
be going wrong?
Thanks!
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