mod09 - TKinter

Question 1

List types of command line user interfaces.

Answer 1

Powershell, cmd, bash, korn, borne, c, telnet, OSGeo4Wshell, ftp

Question 2

List types of graphical user interfaces.

Answer 2

ArcPro, QGIS, FME, pgModeler, VScode, LibreOffice, Android apps, iOS apps, ArcGIS Online, pgAdmin4, proxmox

Question 3

List Python GUI solutions.

Answer 3

Tkinter, wxWidgets, QT, Kivy, GTK+

Question 4

List TKinter widgets.

Answer 4

button, checkbox, entry, frame, label, labelframe, spinbox, panedwindow, scale, scrollbar, progressbar, sizegrip, treeview, radiobutton, menubutton, combobox, separator, notebook, listbox, canvas, text

Question 5

What is the top level widget of TKinter?

Answer 5

Tk - The GUI part of TCL/TK

Question 6

What does Tk.mainloop() do?

Answer 6

Launches the GUI and takes over the thread.

Question 7

How do you stop the GUI using TKinter?

Answer 7

tk.destroy()

Question 8

What are the 4 components of an event paradigm?

Answer 8

1) Event Loop
2) Events
3) Event Handler
4) Registration

Question 9

What is a binding var?

Answer 9

The association between a variable name and its value. The value is stored elsewhere (in a control) and the binding variable can access this value.

Question 10

List binding variables used in TKinter.

Answer 10

StringVar(), IntVar(), DoubleVar(), BooleanVar()

Question 11

What is a frame widget?

Answer 11

A container that can hold other widgets.

Question 12

What is the difference between the text widget and entry widget?

Answer 12

The entry widget allows a user to enter a single-line of text, whereas the text widget allows a user to enter multiple-lines of text.

Question 13

What is hooking early in a TKinter event?

Answer 13

The command property of the widget = callback function. Event is left mouse button single click (LMBSC).
«button-1» release

Question 14

What is hooking late in a TKinter event?

Answer 14

The bind method is used AFTER the widget has been created.
widget.bind(“«name of the event»”, callback function)

Question 15

What is <Button-2>?</Button-2>

Answer 15

middle mouse buttton (left+right)

Question 16

What is <Button-4>?</Button-4>

Answer 16

scroll up

Question 17

What is <Button-5>?</Button-5>

Answer 17

scroll down

Question 18

What is pack()?

Answer 18

Geometry manager that organizes widgets in horizontal or vertical boxes which are limited to left, right, top, or bottom.

Question 19

What is grid()?

Answer 19

Geometry manager that organizes widgets in a table-like structure. Row/Column concept. Sticky: N, S, E, W, NE, NW, SE, SW

Question 20

What is place()?

Answer 20

Geometry manager that allows you to place a widget at it’s absolute position.

Question 21

What are 3 “No decision” messagebox variants?

Answer 21

messagebox.showinfo()
messagebox.showerror()
messagebox.showwarning()

Question 22

What are 4 “Decision (True or False return)” message box variants?

Answer 22

answer = messagebox.askokcancel
answer = messagebox.askretrycancel
answer = messagebox.askyesno
answer = messagebox.askyesnocancel