List of events
Event_name |
class |
Description |
|---|---|---|
| button_press_event | MouseEvent | The mouse button is pressed |
| button_release_event | MouseEvent | The mouse button is released |
| draw_event | DrawEvent | The canvas draw occurs |
| key_press_event | KeyEvent | A key is pressed |
| key_release_event | KeyEvent | A key is released |
| motion_notify_event | MouseEvent | The motion of the mouse |
| pick_event | PickEvent | An object in the canvas is selected |
| resize_event | ResizeEvent | The figure canvas is resized |
| scroll_event | MouseEvent | The scroll wheel of the mouse is rolled |
| figure_enter_event | LocationEvent | The mouse enters a figure |
| axes_enter_event | LocationEvent | The mouse enters an axes object |
| axes_leave_event | LocationEvent | The mouse leaves an axes object |
| figure_leave_event | LocationEvent | The mouse leaves a figure |
Note: That the classes are defined in matplotlib.backend_bases
Event Handling in Matplotlib
Event based System usually is part of a recurring set of patterns. Often, they comprise of the following :
- An incoming event
- A mechanism that is used to respond to an event
- A looping construct (e.g. while loop, listener, and the message dispatch mechanism)
The events that are triggered are also a bit richer, including information like which Axes the event occurred in. The events also understand the Matplotlib coordinate system and report event locations in both pixel and data coordinates.
Syntax:
figure.canvas.mpl_connect( Event_name , callback function or method)
Parameters:
- Event_name: It could be any from the below table
- callback_function: It will define to handle the event.