Canvas¶
ntk will solve your problem when you can’t learn and implement, python tkinter to create desktop application in concern to good looking and os level implementation.
Canvas is highly customizable and most usedful widget for drawing anything
ntk Canvas is extended version of tkinter base Canvas with more functionality and responsive grid system, to use this Canvas window we need to import first it from ntk by
from ntk import Canvas
and initialize it by calling it
window = Canvas(root)
This will create wrapper and basic style will be applied, you need to pass parameters described below to get your desired window size and style
available parameters are:
root, # root is a master window to place this button into it
bg="bg-white", # background color
highlightbackground="bg-white", # background color when canvas is highlighted
highlightcolor="fg-dark", # foreground color when canvas is highlighted
selectbackground="bg-primary", # element background color when canvas element is selected
scrollregion=[0,0,350,96], # [x1, y1, x2, y2] region when canvas is scrolling via scrollbar or mouse
relief="flat", # relief design can be flat, groove etc
width=350, # canvas width
height=96, # canvas height
row=0, # row position
column=0, # column position
rowspan=1, # row spanning size
columnspan=1, # column spanning size
padx=1, # padding in left and right
pady=1, # padding in top and bottom
mousescroll=True, # set False if you don’t want to scrolling when scrolling via mouse
gridcolumn=1, # set 0 if you don’t want responsiveness by column in it’s root window
gridrow=1, # set 0 if you don’t want responsiveness by row in it’s root window
an example of creating Canvas widget:
from ntk import Tk, Canvas
root = Tk(title='Example of ntk window')
canvas = Canvas(root)
root.mainloop()
canvas widget have some other custom method to get extra power
select_clicked is one of method which can be used for selecting clicked item from canvas widget for doing this, we can call it in anywhere, using callback or event binding
canvas.select_clicked()
mousewheel method is used by canvas itself, to scroll on canvas height when scrolling by mouse
increase_scrollragion is can be used to increase canvas scrollable area, it take’s four parameters
x1=False, # area start left position
y1=False, # area start top position
x2=False, # area start right position
y2=False# area start bottom position
decrease_scrollragion is can be used to decrease canvas scrollable area, it take’s four parameters
x1=False, # area start left position
y1=False, # area start top position
x2=False, # area start right position
y2=False# area start bottom position
you can pass extra arguments and keyword arguments, and those will be passed to tkinter Canvas class.