Python GUI's Tkinter event handling

Events List

Event	Code	Note
left mouse button Click to press the	1/button-1/buttonpress-1
left mouse button click to release	ButtonRelease-1
Right-click	3
Left mouse button Double-click	Double-1/double-button-1
right mouse button Double-click	Double-3
Mouse wheel Click	2
Mouse Wheel Double-click	Double-2
Mouse movement	B1-motion
Move Mouse to Area	Enter
Mouse off area	Leave
Get keyboard focus	Focusin
Lose keyboard focus	Focusout
Keyboard events	Key
Enter	Return
Control dimensions Change	Configure

Response Time Advance response

The Treeviewselect event of the TTK TreeView is advanced, that is, you have selected a row, and treeview.selection () [0] is the same.

Postpone the corresponding

For example, if the TTK TreeView is clicked, the clicked Row is selected, but the selected row is not obtained by treeview.selection () [0]! Instead, the previously selected row. can refer to the following here.

Response function

Event_handler (Event,*args)

Event parameter

The event parameter has the following properties:

[' __doc__ ', ' __module__ ', ' char ', ' delta ', ' height ', ' keycode ', ' keysym ', ' keysym_num ', ' num ', ' send_event ', ' Serial ', ' s Tate ', ' Time ', ' type ', ' widget ', ' width ', ' x ', ' x_root ', ' y ', ' y_root ']

Event Attributes

Widgets

The widget which generated this event. This was a valid Tkinter widget instance, not a name. This attribute is set to all events.

X, y

The current relative position of the mouse, in pixels.

For example, the TTK TreeView has a way to locate rows through the y-coordinate: identify_row (self, y)

X_root, Y_root

The current absolute position of the mouse relative to the upper-left corner of the device. In pixels.

Char

Character (only in keyboard events), the type is a string.

Keysym

The key symbol (keyboard events only).

Key (only in keyboard events)

KeyCode

Key code (only in keyboard events).

Num

Button number (only in mouse event) 1-left/2-Middle/3-right

width, height

The new size of the widget, in pixels (Configure events only).

Type

Event Type

1---

2---

3---

4---Mouse

For more information, see here.

Binds the event control. Bind (' < event code > ', Event_handler)

Applies to most controls. There are also bind_all methods.

Control. Protocal (' event code ', Event_handler)

The control of this case must be the top-level window or the root container.

Python GUI's Tkinter event handling