Image widget

Example showing the image widget in action.

Every image in an ImageWidget is associated with an interactive Histogram LUT tool and colorbar. Right-click the colorbar to pick colormaps.

/home/runner/work/fastplotlib/fastplotlib/fastplotlib/graphics/_features/_base.py:18: UserWarning: casting float64 array to float32
  warn(f"casting {array.dtype} array to float32")

# test_example = true
import glfw
import fastplotlib as fpl
import imageio.v3 as iio  # not a fastplotlib dependency, only used for examples

a = iio.imread("imageio:camera.png")
iw = fpl.ImageWidget(data=a, cmap="viridis", figure_kwargs={"size": (700, 560)})
iw.show()

# Access ImageGraphics managed by the image widget
iw.figure[0, 0]["image_widget_managed"].data[:50, :50] = 0
iw.figure[0, 0]["image_widget_managed"].cmap = "gnuplot2"

# another way to access the image widget managed ImageGraphics
iw.managed_graphics[0].data[450:, 450:] = 255

figure = iw.figure

# NOTE: `if __name__ == "__main__"` is NOT how to use fastplotlib interactively
# please see our docs for using fastplotlib interactively in ipython and jupyter
if __name__ == "__main__":
    print(__doc__)
    fpl.loop.run()