#Python tkinter treeview bind how to

event.x, event.yĮvent, if a button is released. The current position of the mouse pointer is provided in the x and y members of the event object passed to the callback, i.e. To specify the left, middle or right mouse button use, and respectively. The mouse is moved with a mouse button being held down. You can use ButtonPress instead of Button, or even leave it out completely:, , and are all synonyms. The current position, relative to the widget, of the mouse pointer is provided in the x and y members of the event object passed to the callback.

Further mouse events like Motion and Release events will be sent to the current widget, even if the mouse is moved outside the current widget. If you press down a mouse button over a widget and keep it pressed, Tkinter will automatically 'grab' the mouse pointer. defines the scroll up event on mice with wheel support and and the scroll down. The left mouse button is defined by the event, the middle button by, and the rightmost mouse button by. The detail part specifies which button, e.g. EventĪ mouse button is pressed with the mouse pointer over the widget. actions like mouse clicks, key presses or the widget got the input focus. The event 'type' describes the kind of event to be bound, e.g. They are used to provide additional information for the chosen 'type'. The type field is the essential part of an event specifier, whereas the 'modifier' and 'detail' fields are not obligatory and are left out in many cases. The event sequence is given as a string, using the following syntax: It is the first argument 'event' of the bind method. Tkinter uses so-called event sequences for allowing the user to define which events, both specific and general, he or she wants to bind to handlers. When we leave this widget, the function motion() is not called anymore.Įnjoying this page? We offer live Python training courses covering the content of this site. Msg.config(bg='lightgreen', font=('times', 24, 'italic'))Įvery time we move the mouse in the Message widget, the position of the mouse pointer will be printed. Msg = Message(master, text = whatever_you_do)

Whatever_you_do = 'Whatever you do will be insignificant, but it is very important that you do Print('Mouse position: (%s %s)' % (event.x, event.y)) if the mouse is moved inside of a widget:

#Python tkinter treeview bind how to

Let's have another simple example, which shows how to use the motion event, i.e. Widget = Button(None, text='Mouse Clicks') # write tkinter as Tkinter to be Python 2.x compatible If the defined event occurs in the widget, the 'handler' function is called with an event object. For each widget, it's possible to bind Python functions and methods to an event.

Tkinter provides a mechanism to let the programmer deal with events. Events can be key presses or mouse operations by the user. A Tkinter application runs most of its time inside an event loop, which is entered via the mainloop method.