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GUI-Programming Articles
Page 7 of 25
How to draw an arc on a tkinter canvas?
The Canvas is a rectangular area intended for drawing pictures or other complex layouts. You can place graphics, text, widgets or frames on a Canvas.To draw an arc on a tkinter Canvas, we will use the create_arc() method of the Canvas and supply it with a set of coordinates to draw the arc. We can use create_arc() to create an arc item, which can be a chord, a pieslice, or a simple arc.Steps −Import the required libraries and create an instance of tkinter frame.Set the size of the frame using root.geometry method.Create a Canvas widget and set its height and ...
Read MoreHow to get rid of widget border in Tkinter?
Tkinter comes with different types of widgets such as Button, Entry, Frame, Label, Radiobutton, Scrollbar, etc. Widgets are standard graphical user interface (GUI) elements that display information or help users interact with the system.In this example, we will see how to get rid of the border from a canvas, Entry fields, labels, and buttons.Steps −Import the required libraries and create an instance of tkinter frame.Set the size of the frame using root.geometry method.Next, create a Canvas and set the border width of the canvas with "bd" attribute. Then, use the "highlightthickness" attribute to define whether you want to show the ...
Read MoreHow to run an infinite loop in Tkinter?
To run an infinite loop in Tkinter, we will use the after method to call a method recursively after a specified time period until the user decides to stop the loop. Let's take a simple example and see how to start and stop an infinite loop.Steps −Import the required libraries and create an instance of tkinter frame.Set the size of the frame using win.geometry method.Next, create a user-defined function "infinite_loop" which will call itself recursively and print a statement on the window.Define two more user-defined functions, start() and stop(), to control the infinite_loop. Define a global variable "condition". Inside start(), ...
Read MoreHow can I determine the position of a Toplevel in Tkinter?
To place objects in the middle of a frame, we can use the place method. Let's take an example and see how it's done.Steps −Import the required libraries and create an instance of tkinter frame.Set the size of the frame using win.geometry method.Next, create a button and label it.Set the position of the buttons using the place method by supplying the x and y coordinate values.Place the center of the widget at a relative x and y position of 0.5 of button widget (relx=0.5, rely=0.5). Set the anchor at the center by supplying "anchor=CENTER"Finally, run the mainloop of the application ...
Read MoreHow to place objects in the middle of a frame using tkinter?
To place objects in the middle of a frame, we can use the place method. Let's take an example and see how it's done.Steps −Import the required libraries and create an instance of tkinter frame.Set the size of the frame using win.geometry method.Next, create a button and label it.Set the position of the buttons using the place method by supplying the x and y coordinate values.Place the center of the widget at a relative x and y position of 0.5 of button widget (relx=0.5, rely=0.5). Set the anchor at the center by supplying "anchor=CENTER"Finally, run the mainloop of the application ...
Read MoreHow to bind a Tkinter event to the left mouse button being held down?
To bind a Tkinter event to the left mouse button being held down, we can take the following steps −Create an instance of tkinter frame.Set the size of the frame using win.geometry method.Define an event handler "handler1" to print a statement when the mouse is moved with the left button being held down.Define another event handler "handler2" to print a statement when the mouse button is released.Use the bind method to bind with handler1.Use the bind method again to bind with hander2.Finally, run the mainloop of the application window.Example# Import required libraries from tkinter import * # ...
Read MoreHow to save the contents of a Textbox in Tkinter?
To save the contents of a Textbox in Tkinter, we can take the following steps −Create an instance of tkinter frame.Set the size of the frame using win.geometry method.Define a user-defined method "open_text" to open a text file in "read" mode. Read the contents of the text file and save it in a variable called "content". Then, use the "insert" method to insert the contentin a Textbox.Next, define another user-defined method called "save_text" and in it, use the "write" method to save the contents of the textbox in the text file.Create a text widget using the Text method with specified ...
Read MoreHow to make a new folder using askdirectory dialog in Tkinter?
To make a new folder using askdirectory dialog in Tkinter, we can take the following steps −Import the required modules. filedialog module is required for askdirectory method. os module is required for makedirs method.Create an instance of tkinter frame.Set the size of the frame using win.geometry method.Define a user-defined method "create_subfolder". Inside the method, call filedialog.askdirectory to select a folder and save the path in a variable, source_path.We can use askdirectory method of filedialog to open a directory. Save the path of the selected directory in a 'path' variable.Then, use os.path.join and makedirs to create a sub-folder inside the parent ...
Read MoreDrawing a line between two mouse clicks using tkinter
Consider a case for creating a GUI application such that when we click on the window with a mouse button, it stores the coordinates and creates a line between two given points. Tkinter provides events that allow the user to bind the keys or buttons with the functions.To draw a line between two points, we can follow these general steps, Create a canvas widget and pack it to display in the window.Define a function draw_line() that works as the event when the user does the click event.Create a global variable that counts the number of clicks in the canvas.If the ...
Read MoreHow to create a Tkinter error message box?
The Tkinter library has many built-in functions and methods which can be used to implement the functional part of an application. We can use messagebox module in Tkinter to create various popup dialog boxes. The messagebox property has different types of built-in popup windows that the users can use in their applications.If you need to display the error messagebox in your application, you can use showerror("Title", "Error Message") method. This method can be invoked with the messagebox itself.Example# Import the required libraries from tkinter import * from tkinter import messagebox # Create an instance of tkinter frame or window ...
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