Clarify that draw_event occurs after the canvas draw.

anntzer · anntzer · commit 0d6a79b0fae7 · 2020-04-17T13:02:18.000+02:00
... and homogenize grammatical form of descriptions to "noun verb
(object)".
diff --git a/doc/users/event_handling.rst b/doc/users/event_handling.rst
@@ -58,18 +58,18 @@ disconnect the callback, just call::
 Here are the events that you can connect to, the class instances that
 are sent back to you when the event occurs, and the event descriptions:
 
-
 ====================== ================ ======================================
 Event name             Class            Description
 ====================== ================ ======================================
 'button_press_event'   `.MouseEvent`    mouse button is pressed
 'button_release_event' `.MouseEvent`    mouse button is released
-'close_event'          `.CloseEvent`    a figure is closed
-'draw_event'           `.DrawEvent`     canvas draw (but before screen update)
+'close_event'          `.CloseEvent`    figure is closed
+'draw_event'           `.DrawEvent`     canvas has been drawn (but screen
+                                        widget not updated yet)
 'key_press_event'      `.KeyEvent`      key is pressed
 'key_release_event'    `.KeyEvent`      key is released
-'motion_notify_event'  `.MouseEvent`    mouse motion
-'pick_event'           `.PickEvent`     an object in the canvas is selected
+'motion_notify_event'  `.MouseEvent`    mouse moves
+'pick_event'           `.PickEvent`     artist in the canvas is selected
 'resize_event'         `.ResizeEvent`   figure canvas is resized
 'scroll_event'         `.MouseEvent`    mouse scroll wheel is rolled
 'figure_enter_event'   `.LocationEvent` mouse enters a new figure
