daawing app python
from tkinter import *
from tkinter.colorchooser import askcolor
class Paint(object):
DEFAULT_PEN_SIZE = 5.0
DEFAULT_COLOR = 'black'
def __init__(self):
self.root = Tk()
self.pen_button = Button(self.root, text='pen', command=self.use_pen)
self.pen_button.grid(row=0, column=0)
self.brush_button = Button(self.root, text='brush', command=self.use_brush)
self.brush_button.grid(row=0, column=1)
self.color_button = Button(self.root, text='color', command=self.choose_color)
self.color_button.grid(row=0, column=2)
self.eraser_button = Button(self.root, text='eraser', command=self.use_eraser)
self.eraser_button.grid(row=0, column=3)
self.choose_size_button = Scale(self.root, from_=1, to=10, orient=HORIZONTAL)
self.choose_size_button.grid(row=0, column=4)
self.c = Canvas(self.root, bg='white', width=600, height=600)
self.c.grid(row=1, columnspan=5)
self.setup()
self.root.mainloop()
def setup(self):
self.old_x = None
self.old_y = None
self.line_width = self.choose_size_button.get()
self.color = self.DEFAULT_COLOR
self.eraser_on = False
self.active_button = self.pen_button
self.c.bind('<B1-Motion>', self.paint)
self.c.bind('<ButtonRelease-1>', self.reset)
def use_pen(self):
self.activate_button(self.pen_button)
def use_brush(self):
self.activate_button(self.brush_button)
def choose_color(self):
self.eraser_on = False
self.color = askcolor(color=self.color)[1]
def use_eraser(self):
self.activate_button(self.eraser_button, eraser_mode=True)
def activate_button(self, some_button, eraser_mode=False):
self.active_button.config(relief=RAISED)
some_button.config(relief=SUNKEN)
self.active_button = some_button
self.eraser_on = eraser_mode
def paint(self, event):
self.line_width = self.choose_size_button.get()
paint_color = 'white' if self.eraser_on else self.color
if self.old_x and self.old_y:
self.c.create_line(self.old_x, self.old_y, event.x, event.y,
width=self.line_width, fill=paint_color,
capstyle=ROUND, smooth=TRUE, splinesteps=36)
self.old_x = event.x
self.old_y = event.y
def reset(self, event):
self.old_x, self.old_y = None, None
if __name__ == '__main__':
Paint()