add references to widget examples

ianhi · ianhi · commit bafcca98b218 · 2020-11-11T22:16:27.000-05:00
plus lint snapping example
diff --git a/.flake8 b/.flake8
@@ -283,4 +283,4 @@ per-file-ignores =
     examples/userdemo/connectionstyle_demo.py: E402
     examples/userdemo/custom_boxstyle01.py: E402
     examples/userdemo/pgf_preamble_sgskip.py: E402
-    examples/widgets/textbox.py: E402
+    examples/widgets/*.py: E402
diff --git a/examples/widgets/buttons.py b/examples/widgets/buttons.py
@@ -48,3 +48,16 @@ def prev(self, event):
 bprev.on_clicked(callback.prev)
 
 plt.show()
+
+#############################################################################
+#
+# ------------
+#
+# References
+# """"""""""
+#
+# The use of the following functions, methods, classes and modules is shown
+# in this example:
+
+import matplotlib
+matplotlib.widgets.Button
diff --git a/examples/widgets/check_buttons.py b/examples/widgets/check_buttons.py
@@ -41,3 +41,16 @@ def func(label):
 check.on_clicked(func)
 
 plt.show()
+
+#############################################################################
+#
+# ------------
+#
+# References
+# """"""""""
+#
+# The use of the following functions, methods, classes and modules is shown
+# in this example:
+
+import matplotlib
+matplotlib.widgets.CheckButtons
diff --git a/examples/widgets/cursor.py b/examples/widgets/cursor.py
@@ -24,3 +24,16 @@
 cursor = Cursor(ax, useblit=True, color='red', linewidth=2)
 
 plt.show()
+
+#############################################################################
+#
+# ------------
+#
+# References
+# """"""""""
+#
+# The use of the following functions, methods, classes and modules is shown
+# in this example:
+
+import matplotlib
+matplotlib.widgets.Cursor
diff --git a/examples/widgets/lasso_selector_demo_sgskip.py b/examples/widgets/lasso_selector_demo_sgskip.py
@@ -99,3 +99,17 @@ def accept(event):
     ax.set_title("Press enter to accept selected points.")
 
     plt.show()
+
+#############################################################################
+#
+# ------------
+#
+# References
+# """"""""""
+#
+# The use of the following functions, methods, classes and modules is shown
+# in this example:
+
+import matplotlib
+matplotlib.widgets.LassoSelector
+matplotlib.path.Path
diff --git a/examples/widgets/multicursor.py b/examples/widgets/multicursor.py
@@ -22,3 +22,16 @@
 
 multi = MultiCursor(fig.canvas, (ax1, ax2), color='r', lw=1)
 plt.show()
+
+#############################################################################
+#
+# ------------
+#
+# References
+# """"""""""
+#
+# The use of the following functions, methods, classes and modules is shown
+# in this example:
+
+import matplotlib
+matplotlib.widgets.MultiCursor
diff --git a/examples/widgets/polygon_selector_demo.py b/examples/widgets/polygon_selector_demo.py
@@ -91,3 +91,17 @@ def disconnect(self):
     # After figure is closed print the coordinates of the selected points
     print('\nSelected points:')
     print(selector.xys[selector.ind])
+
+#############################################################################
+#
+# ------------
+#
+# References
+# """"""""""
+#
+# The use of the following functions, methods, classes and modules is shown
+# in this example:
+
+import matplotlib
+matplotlib.widgets.PolygonSelector
+matplotlib.path.Path
diff --git a/examples/widgets/radio_buttons.py b/examples/widgets/radio_buttons.py
@@ -53,3 +53,16 @@ def stylefunc(label):
 radio3.on_clicked(stylefunc)
 
 plt.show()
+
+#############################################################################
+#
+# ------------
+#
+# References
+# """"""""""
+#
+# The use of the following functions, methods, classes and modules is shown
+# in this example:
+
+import matplotlib
+matplotlib.widgets.RadioButtons
diff --git a/examples/widgets/rectangle_selector.py b/examples/widgets/rectangle_selector.py
@@ -57,3 +57,16 @@ def toggle_selector(event):
                                        interactive=True)
 fig.canvas.mpl_connect('key_press_event', toggle_selector)
 plt.show()
+
+#############################################################################
+#
+# ------------
+#
+# References
+# """"""""""
+#
+# The use of the following functions, methods, classes and modules is shown
+# in this example:
+
+import matplotlib
+matplotlib.widgets.RectangleSelector
diff --git a/examples/widgets/slider_demo.py b/examples/widgets/slider_demo.py
@@ -63,3 +63,18 @@ def colorfunc(label):
 colorfunc(radio.value_selected)
 
 plt.show()
+
+#############################################################################
+#
+# ------------
+#
+# References
+# """"""""""
+#
+# The use of the following functions, methods, classes and modules is shown
+# in this example:
+
+import matplotlib
+matplotlib.widgets.Button
+matplotlib.widgets.RadioButtons
+matplotlib.widgets.Slider
diff --git a/examples/widgets/slider_snap_demo.py b/examples/widgets/slider_snap_demo.py
@@ -39,9 +39,10 @@
 sfreq = Slider(
     ax_freq, "Freq", 0, 10*np.pi,
     valinit=2*np.pi, valstep=np.pi,
-    initcolor='none' # Remove the line marking the valinit position.
+    initcolor='none'  # Remove the line marking the valinit position.
 )
 
+
 def update(val):
     amp = samp.val
     freq = sfreq.val
@@ -63,3 +64,17 @@ def reset(event):
 
 
 plt.show()
+
+#############################################################################
+#
+# ------------
+#
+# References
+# """"""""""
+#
+# The use of the following functions, methods, classes and modules is shown
+# in this example:
+
+import matplotlib
+matplotlib.widgets.Slider
+matplotlib.widgets.Button
diff --git a/examples/widgets/span_selector.py b/examples/widgets/span_selector.py
@@ -52,3 +52,16 @@ def onselect(xmin, xmax):
 
 
 plt.show()
+
+#############################################################################
+#
+# ------------
+#
+# References
+# """"""""""
+#
+# The use of the following functions, methods, classes and modules is shown
+# in this example:
+
+import matplotlib
+matplotlib.widgets.SpanSelector
