Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I am trying to bind the left and right arrow keys to an event in Tkinter, but when I run the program it appears the events are not triggering. Here is the code:. I should explain that this works because Tk is made aware of the bindings because the main window has keyboard focus.
As BryanOakley's answer explained you could also just set the keyboard focus to the other frame:. See more about events and bindings at effbot. Also, you could also re-write this so your application is a sub-class of Tkinter. Frame like so:. The problem is simply that the frame you are binding to doesn't have the keyboard focus.
When you press a key on the keyboard, the event is sent to the widget with the keyboard focus. By default, a frame does not have keyboard focus.
It might be that you don't intercept the right events. The arrows on the numeric keypad and the other ones have different symbolic names. Learn more. Tkinter - Can't bind arrow key events Ask Question. Asked 6 years, 11 months ago. Active 3 years, 6 months ago. Viewed 44k times. Active Oldest Votes.
I have done the binding, but when I click the arrow keys, nothing moves. I tried adding a print statement to the method, and when I click the keys, nothing prints, so the method isn't getting called. I don't think the binding is working, but I'm not sure how to fix it! Also, is there a way to keep running a bound method if the user holds the bound key? Like click and holding the left key and having the method keep running over and over until the user lets go.
I also can't quite understand your code. In move class World's methodyou set the parameter nbut you never use it. Try cleaning up your code a bit, or adding comments to explain what exactly you are doing. It's just looking like you don't have focus on the frame so the keyboard presses aren't getting sent to the correct frame.
As far as holding goes you can have the event continue until the key is released. Formatting for releasing keys goes like this:. Learn more. Event binding arrow keys python Tkinter Ask Question.
Asked 6 years, 6 months ago. Active 4 years, 5 months ago. Viewed 6k times. Active Oldest Votes. Ditch the lambdas for class functions.
It only takes a minute to sign up. I'm specifically asking about binding a keyboard keystroke to a button in a GUI. Originally I planned to bind the keystroke to the GUI button itself, but that seemed impossible, and potentially unwise after I considered it later. The intention of the project is to make a simple image viewer in python, with buttons in the GUI for basic navigation functions, and keys mapped to those same functions.
TL;DR : Yes, binding the keyboard key and button to the same function is a proper solution. There are two ways to share a function between a bind keypress a command button. As you have already discovered yourself, you can use an optional event parameter that you don't depend on. If the event parameter isn't being used, you can discard it by binding your key to a lambda function. See How do I make Bind and Command do the same thing in tkinter?
To ensure continued support, you should transition to Python 3 or later. This is more personal preference than a rule, but I usually try to use strings when packing in tkinter. It means you don't have to import as many things. It's hard to judge exactly what you mean by 'proper', but it works, and I don't see any major caveats with this approach.
Binding the callback to the button and calling button. Think about it: Does the callback apply only to the button? At least in the case of the quit-callback, no; no matter what widget has focus, pressing 'q' should quit the application. For one, using wildcard imports can cause conflicts if two symbols with the same name, defined in different namespaces, are imported into the global namespace. Secondly, for other developers, there's no way to quickly tell where an object was defined.
PEP-8 proposes sorting import statements alphabetically.
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Unless you have compelling reasons to use Python 2, switch to Python 3! Version 2. Sign up to join this community. The best answers are voted up and rise to the top. Binding a keyboard key to a Tkinter button Ask Question. Asked 2 years, 6 months ago. Active 2 years, 5 months ago. Viewed 27k times. Is this the proper pythonic way to bind a keyboard key and GUI button? PhotoImage self. I haven't implemented the other functions yet, and I was hoping to just get the code implemented thus-far reviewed.
In fact, the original question was just asking about reviewing one specific portion of the code - that is, the binding of the keystrokes in association with the buttons in the GUI. However, that specific-level of question was downvoted and given a recommendation to adhere to the guidance in the help center. I understand there may be a common issue of incomplete code segments posted, but I have truly included the entire module.
Each library will have its own way of handling button binding.It comes along with the Python, but you can also install it externally with the help of pip command.
It provides a variety of Widget classes and functions with the help of which one can make our GUI more attractive and user-friendly in terms of both looks and functionality.
The binding function is used to deal with the events. Code 1: Binding mouse movement with tkinter Frame. Code 2: Binding Mouse buttons with Tkinter Frame. Code 3: Binding keyboard buttons with the root window tkinter main window. Note: When we bind keyboard buttons with the tkinter window, whenever we press special characters we will only get space while in the case of alphabets and numerical we will get actual values in the string.
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Another source can be a hardware device such as a timer. A program or a script whose behaviour depends on events is said to be event-driven. This website is created by Bernd Klein from: Python Training Courses Events Philosophically An Event is an occurrence regarded as a bare instant of space-time as contrasted with an object which fills space and has endurance. It can also be an occurrence regarded in isolation from, or contrasted with, human agency Compare act.
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If you are interested in an instructor-led classroom training course, you may have a look at the Python and Tkinter courses by Bernd Klein at Bodenseo. It is also possible to book an on-site training course at your company or institute. Quote of the Day: "Computer science is no more about computers than astronomy is about telescopes.
Originally interactive user interfaces to computers were not graphical, they were text oriented and usually consisted of commands, which had to be remembered. The DOS operating system from Microsoft and the Bourne shell under Linux are examples of such user-computer interfaces.
Previous Chapter: Creating Menus. A mouse button is pressed with the mouse pointer over the widget. The detail part specifies which button, e. If you press down a mouse button over a widget and keep it pressed, Tkinter will automatically "grab" the mouse pointer.
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. 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.As was mentioned earlier, a Tkinter application spends most of its time inside an event loop entered via the mainloop method.
Events can come from various sources, including key presses and mouse operations by the user, and redraw events from the window manager indirectly caused by the user, in many cases. Tkinter provides a powerful mechanism to let you deal with events yourself.
For each widget, you can bind Python functions and methods to events. If an event matching the event description occurs in the widget, the given handler is called with an object describing the event.
Run this program and click in the window that appears. Keyboard events are sent to the widget that currently owns the keyboard focus. The type field is the most important part of an event specifier. It specifies the kind of event that we wish to bind, and can be user actions like Buttonand Keyor window manager events like EnterConfigureand others.
The modifier and detail fields are used to give additional information, and can in many cases be left out. There are also various ways to simplify the event string; for example, to match a keyboard key, you can leave out the angle brackets and just use the key as is. Unless it is a space or an angle bracket, of course. A mouse button is pressed over the widget. Button 1 is the leftmost button, button 2 is the middle button where availableand button 3 the rightmost button. Motion and Release events will then be sent to the current widget as long as the mouse button is held down, even if the mouse is moved outside the current widget.
The current position of the mouse pointer relative to the widget is provided in the x and y members of the event object passed to the callback. The mouse is moved, with mouse button 1 being held down use B2 for the middle button, B3 for the right button.
The current position of the mouse pointer is provided in the x and y members of the event object passed to the callback.
Python | Binding function in Tkinter
Button 1 was released. Button 1 was double clicked. You can use Double or Triple as prefixes. The user pressed the Enter key. You can bind to virtually all keys on the keyboard.Keyboard/Mouse Binding Methods in TKinter - Python Tutorial (2020) #24
The user pressed any key. The key is provided in the char member of the event object passed to the callback this is an empty string for special keys.
Most printable characters can be used as is. The user pressed the Up arrow, while holding the Shift key pressed. You can use prefixes like AltShiftand Control. The widget changed size or location, on some platforms.With all of this said though, the Stoke defense has been far from impenetrable this season.
Spurs need three points for confidence heading into the Christmas fixture list and just to simply put points on the board. Stoke can be dangerous, but they are a team Tottenham have consistently handled in the past.
Toby Aldwerweireld and Davinson Sanchez will be out, so it will be a greater than usual challenge, but hopefully Spurs are up to the task and get back on track. TV: NBCSN (NBC Sports Live Extra), BBC Radio (UK), TSN4, TSNGO (Canada), Optus Sport (Australia), other listings at livesoccertv.
Poch quelled fears this morning stating that he avoided anything too serious. Victor Wanyama has resumed light outdoor training, which is a big positive. With Dier being forced to the backline, we could really use him right now. Lastly, Davinson Sanchez will miss out due to his red card against Watford.
Maybe Ben Davies slots to the left center-back spot and Danny Rose could feature out left, but that is unlikely. My predicted lineup will be in a 4-2-3-1 formation and will be as follows: Kieran Trippier will play at right-back, Eric Dier and Jan Vertonghen will feature in the middle, with Ben Davies at left-back. Harry Kane will start as the lone forward. Jake Meador and Joel Wertheimer nailed the 1-1 scoreline. With the perfect prediction Wertheimer, a newcomer to the competition, catapults himself into a two way first placed tie with the old Uncle himself.
Dustin Menno: I have nothing to say about Stoke, really. Matthew Pachniuk: Spurs have to bounce back, right. Jake Meador: Dr Stoke City will see you now. Spurs 3, Stoke 1. Pardeep Cattry: Kevin Wimmer v. Son Heung-Min for the first time since their separation means someone will be saying sorry for his team's success at the end. It'll probably be Son. Joel Wertheimer: A full week of rest will do wonders for Eriksen and Kane.
Spurs get back to smashing the dregs of the league. Nathan Giannini: Have we ever played Stoke and not won 4-0. Joe Patrick: I'm well and truly stumped as to how this team will perform on a match-to-match basis. I'll guess 2-1 Spurs. Bryan A: We're playing Stoke and we just won convincingly in the Champions League.
ET (USA) Venue: Wembley Stadium, London, UK Official: Roger East TV: NBCSN (NBC Sports Live Extra), BBC Radio (UK), TSN4, TSNGO (Canada), Optus Sport (Australia), other listings at livesoccertv. Prediction League Jake Meador and Joel Wertheimer nailed the 1-1 scoreline.
Cartilage Free Captain Prediction League Standings 2017-18 Name Score Name Score Dustin Menno 9 Joel Wertheimer 9 Joe Patrick 8 Alex Greenberg 8 Pardeep Cattry 8 Earl of Shoop 8 Jake Meador 8 Matthew Pachniuk 6 GN Punk 6 Salmon Chase 6 Ed F. Stoke: final score 5-1, Spurs stake Stoke with brilliant second half Tottenham Hotspur vs. Their results are another matter. The sidebar size is long.
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