PyQtGraph - Getting Scene Transform Object of Bar Graph

PyQtGraph - Getting Scene Transform Object of Bar Graph

In pyqtgraph, the scene transformation can be obtained from the GraphicsView or PlotItem object. If you have a bar graph in a PlotWidget or PlotItem, you can access the scene transform from there.

To demonstrate this, let's say you've created a bar graph using BarGraphItem in pyqtgraph. Here's how you can get the scene transform object:

import pyqtgraph as pg from pyqtgraph.Qt import QtGui import numpy as np app = QtGui.QApplication([]) win = pg.GraphicsLayoutWidget(show=True) plot = win.addPlot() # Create some bar graph data x = np.arange(5) heights = [2, 3, 4, 1, 5] bg1 = pg.BarGraphItem(x=x, height=heights, width=0.6) plot.addItem(bg1) # Get the scene transform object transform = plot.getViewBox().sceneTransform() print(transform) if __name__ == '__main__': QtGui.QApplication.instance().exec_()

In this example, the getViewBox().sceneTransform() gets the scene transform object from the PlotItem. You can access and manipulate the transform object as needed for your application.

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