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A simple paint application using tkinter in Python 3
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| from tkinter import Tk, Button, Scale, Canvas, Label, StringVar, Entry, \ | |
| Toplevel, messagebox | |
| from tkinter.colorchooser import askcolor | |
| from PIL import Image | |
| import os | |
| class FilenamePopup: | |
| def __init__(self, master): | |
| top = self.top = Toplevel(master) | |
| self.lbl = Label(top, text="Choose a file name:") | |
| self.lbl.pack() | |
| self.ent_filename = Entry(top) | |
| self.ent_filename.pack() | |
| self.btn_ok = Button(top, text='Ok', command=self.cleanup) | |
| self.btn_ok.pack() | |
| def cleanup(self): | |
| self.filename = self.ent_filename.get() | |
| self.top.destroy() | |
| 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, sticky="ew") | |
| self.brush_button = Button(self.root, text='Brush', | |
| command=self.use_brush) | |
| self.brush_button.grid(row=0, column=1, sticky="ew") | |
| self.color_button = Button(self.root, text='Color', | |
| command=self.choose_color) | |
| self.color_button.grid(row=0, column=2, sticky="ew") | |
| self.eraser_button = Button(self.root, text='Eraser', | |
| command=self.use_eraser) | |
| self.eraser_button.grid(row=0, column=3, sticky="ew") | |
| self.size_scale = Scale(self.root, from_=1, to=10, | |
| orient='horizontal') | |
| self.size_scale.grid(row=0, column=4, sticky="ew") | |
| self.line_button = Button(self.root, text='Line', | |
| command=self.use_line) | |
| self.line_button.grid(row=1, column=0, sticky="ew") | |
| self.poly_button = Button(self.root, text='Polygon', | |
| command=self.use_poly) | |
| self.poly_button.grid(row=1, column=1, sticky="ew") | |
| self.black_button = Button(self.root, text='', bg='black', | |
| activebackground="black", | |
| command=self.color_default) | |
| self.black_button.grid(row=1, column=2, sticky="ew") | |
| self.clear_button = Button(self.root, text='Clear', | |
| command=lambda: self.c.delete("all")) | |
| self.clear_button.grid(row=1, column=3, sticky="ew") | |
| self.save_button = Button(self.root, text="Save", | |
| command=self.save_file) | |
| self.save_button.grid(row=1, column=4, sticky="ew") | |
| self.c = Canvas(self.root, bg='white', width=600, height=600) | |
| self.c.grid(row=2, columnspan=5) | |
| self.var_status = StringVar(value="Selected: Pen") | |
| self.lbl_status = Label(self.root, textvariable=self.var_status) | |
| self.lbl_status.grid(row=3, column=4, rowspan=3) | |
| self.setup() | |
| self.root.mainloop() | |
| def setup(self): | |
| self.old_x, self.old_y = None, None | |
| self.color = self.DEFAULT_COLOR | |
| self.eraser_on = False | |
| self.active_button = None | |
| self.size_multiplier = 1 | |
| self.activate_button(self.pen_button) | |
| self.c.bind('<B1-Motion>', self.paint) | |
| self.c.bind('<ButtonRelease-1>', self.reset) | |
| self.c.bind('<Button-1>', self.point) | |
| self.root.bind('<Escape>', self.line_reset) | |
| self.line_start = (None, None) | |
| def use_pen(self): | |
| self.activate_button(self.pen_button) | |
| self.size_multiplier = 1 | |
| def use_brush(self): | |
| self.activate_button(self.brush_button) | |
| self.size_multiplier = 2.5 | |
| def use_line(self): | |
| self.activate_button(self.line_button) | |
| def use_poly(self): | |
| self.activate_button(self.poly_button) | |
| def choose_color(self): | |
| self.eraser_on = False | |
| color = askcolor(color=self.color)[1] | |
| if color is not None: | |
| self.color = color | |
| def use_eraser(self): | |
| self.activate_button(self.eraser_button, eraser_mode=True) | |
| def activate_button(self, some_button, eraser_mode=False): | |
| self.set_status() | |
| if self.active_button: | |
| 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.set_status(event.x, event.y) | |
| line_width = self.size_scale.get() * self.size_multiplier | |
| 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=line_width, fill=paint_color, | |
| capstyle='round', smooth=True, splinesteps=36) | |
| self.old_x = event.x | |
| self.old_y = event.y | |
| def line(self, x, y): | |
| line_width = self.size_scale.get() * self.size_multiplier | |
| paint_color = 'white' if self.eraser_on else self.color | |
| self.c.create_line(self.line_start[0], self.line_start[1], x, y, | |
| width=line_width, fill=paint_color, | |
| capstyle='round', smooth=True, splinesteps=36) | |
| def point(self, event): | |
| self.set_status(event.x, event.y) | |
| btn = self.active_button["text"] | |
| if btn in ("Line", "Polygon"): | |
| self.size_multiplier = 1 | |
| if any(self.line_start): | |
| self.line(event.x, event.y) | |
| self.line_start = ((None, None) if btn == 'Line' | |
| else (event.x, event.y)) | |
| else: | |
| self.line_start = (event.x, event.y) | |
| def reset(self, event): | |
| self.old_x, self.old_y = None, None | |
| def line_reset(self, event): | |
| self.line_start = (None, None) | |
| def color_default(self): | |
| self.color = self.DEFAULT_COLOR | |
| def set_status(self, x=None, y=None): | |
| if self.active_button: | |
| btn = self.active_button["text"] | |
| oldxy = (self.line_start if btn in ("Line", "Polygon") | |
| else (self.old_x, self.old_y)) | |
| self.var_status.set(f"Selected: {btn}\n" + | |
| ((f"Old (x, y): {oldxy}\n(x, y): ({x}, {y})") | |
| if x is not None and y is not None else "")) | |
| def save_file(self): | |
| self.popup = FilenamePopup(self.root) | |
| self.save_button["state"] = "disabled" | |
| self.root.wait_window(self.popup.top) | |
| filepng = self.popup.filename + '.png' | |
| if not os.path.exists(filepng) or \ | |
| messagebox.askyesno("File already exists", "Overwrite?"): | |
| fileps = self.popup.filename + '.eps' | |
| self.c.postscript(file=fileps) | |
| img = Image.open(fileps) | |
| img.save(filepng, 'png') | |
| os.remove(fileps) | |
| self.save_button["state"] = "normal" | |
| messagebox.showinfo("File Save", "File saved!") | |
| else: | |
| messagebox.showwarning("File Save", "File not saved!") | |
| self.save_button["state"] = "normal" | |
| if __name__ == '__main__': | |
| Paint() |
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This is actually just a simple fork, I have built a better one and uploaded it as repo Paint XD.
The feature you mentioned isn't implemented yet, but I'll keep that in mind so keep an eye on that one.