fastplotlib · kushalkolar · Nov 16, 2024
@@ -0,0 +1,55 @@
+"""
+Image Widget Pixel Timeseries
+=============================
+
+Use an ImageWidget to view a grayscale video and click on pixels to show their values
+over time (timeseries)
+"""
+
+# test_example = true
+# sphinx_gallery_pygfx_docs = 'animate 6s 20fps'
+
+import numpy as np
+import fastplotlib as fpl
+import imageio.v3 as iio
+
+
+# download and open video file
+print("download and reading video file")
+url = "https://caiman.flatironinstitute.org/~neuro/caiman_downloadables/demoMovieJ.tif"
+url = "/home/kushal/caiman_data/example_movies/demoMovieJ.tif"
+video = iio.imread(url)
+
+iw = fpl.ImageWidget(
+    video,
+    cmap="viridis",
+    figure_kwargs={"size": (700, 600)}
+)
+iw.show()
+
+fig = fpl.Figure(size=(700, 400))
+
+# add an initial point
+row_ix, col_ix = 29, 65
+timeseries = fig[0, 0].add_line(video[:, row_ix, col_ix], thickness=1.0)
+point = iw.figure[0, 0].add_scatter(np.column_stack([col_ix, row_ix]), sizes=10, alpha=0.7, colors="magenta")
+
+time_selector = timeseries.add_linear_selector()
+
+
+@time_selector.add_event_handler("selection")
+def set_time_from_selector(ev):
+    iw.current_index = {"t": ev.get_selected_index()}
+
+
+@iw.managed_graphics[0].add_event_handler("double_click")
+def update_pixel(ev):
+    col, row = ev.pick_info["index"]
+
+    point.data[0, :2] = [col, row]
+    timeseries.data[:, 1] = video[:, row, col]
+    fig[0, 0].auto_scale(maintain_aspect=False)
+
+
+fig.show(maintain_aspect=False)
+fpl.run()
@@ -47,6 +47,14 @@ def limits(self, values: tuple[float, float]):
         )  # if values are close to zero things get weird so round them
         self.selection._limits = self._limits
 
+    @property
+    def end_points(self) -> tuple[float, float]:
+        pass
+
+    @end_points.setter
+    def end_points(self, points: tuple[float, float]):
+        pass
+
     # TODO: make `selection` arg in graphics data space not world space
     def __init__(
         self,