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#!/usr/bin/env python3
# File: sample.py
# License: CC-BY-SA 4.0
# Author: bgstack15
# Startdate: 2019-06-14 17:42
# Title: Learning how to display an svg in tcl/tk with python
# Purpose:
# History:
# Usage:
# References:
# rsvg https://stackoverflow.com/questions/10393675/rsvg-with-python-3-2-on-ubuntu/19744099#19744099
# svg for tkinter http://code.activestate.com/lists/python-list/595078/
# Improve:
# add svg support
# Dependencies:
# package: RPM | DPKG
# tkinter: python36-tkinter | python3-tk
# PIL: python36-pillow-tk | python3-pil.imagetk
# cairo: python36-cairo | python3-cairo
# Rsvg: python36-gobject | gir1.2-rsvg-3.0
import os, sys, configparser, glob, re, cairo
import tkinter as tk
import tkinter.ttk as ttk
from functools import partial
from pathlib import Path
from PIL import Image, ImageTk
sys.path.append("/home/bgirton/dev/logout-manager")
import lmlib
import inspect # here for troubleshooting sample.py only
WITH_SVG=True
if not WITH_SVG is None and WITH_SVG:
from gi import require_version
require_version('Rsvg', '2.0')
from gi.repository import Rsvg as rsvg
#if TkVersion < 8.6:
# USE_PRIVATE_TCL_IMAGES = 1
# print("Loading private PIL translation layter")
# def PhotoImage_from_png(file):
# return ImageTk.PhotoImage(file=file)
config = lmlib.Initialize_config()
actions = lmlib.Actions
# graphical classes and functions
print("Loading graphics...")
def _alpha_blending(rgba, back):
"Return a rgb tuple composed from a rgba and back(ground) tuple/list."
paired = zip(rgba[:-1], back)
alpha = rgba[-1]
tmp = list()
for upper, lower in paired:
blend = int((((255 - alpha) * lower) + (alpha * upper)) / 255)
tmp.append(blend)
return(tuple(tmp))
def convert(bgra_buffer, width, height):
"Convert bgra buffer to photoimage put"
idx = 0
end = len(bgra_buffer)
arguments = list()
while idx < end:
rgba = (ord(str(bgra_buffer[idx + 2])),
ord(str(bgra_buffer[idx + 1])),
ord(str(bgra_buffer[idx + 0])),
ord(str(bgra_buffer[idx + 3])))
back = (255, 255, 255)
rgb = _alpha_blending(rgba, back)
arguments += rgb
idx += 4
template = ' '.join(height *['{%s}' % (''.join(width*["#%02x%02x%02x"]))])
#print(template)
#print(arguments[-1])
return(template % tuple(arguments))
def photoimage_from_svg(file_path_name):
'''Return a Tkinter.PhotoImage with the content set to the rendered SVG.'''
svg = rsvg.Handle()
svg.new_from_file(file_name=file_path_name)
#print(svg)
#print(inspect.getmembers(rsvg.Handle))
#svg.open(file=file_path_name)
#print(svg.height)
#print(svg.get_dimensions().height)
#print(inspect.getmembers(rsvg.DimensionData))
#width, height = svg.get_dimensions()[:2]
width, height = [48,48]
surface = cairo.ImageSurface(cairo.FORMAT_RGB24, int(width), int(height))
context = cairo.Context(surface)
svg.render_cairo(context)
image = tk.PhotoImage(width=width, height=height)
data = convert(surface.get_data(), width, height)
image.put(data)
return(image)
def get_scaled_icon(icon_name, size = 24, icon_theme = "default", fallback_icon_name = ""):
iconfilename = None
# assume icon_name is file.
iconfilename = icon_name
# So now that we think we have derived the correct filename...
photo = photoimage_from_svg(iconfilename)
#try:
# print("Trying svg file",iconfilename)
# # try an svg
# if re.compile(".*\.svg").match(iconfilename):
# print("Trying svg...")
# photo = photoimage_from_svg(iconfilename)
#except Exception as e:
# print("Error with icon file:",e)
# if "gobject" in str(e):
# raise
# return None
photo.thumbnail(size=[size, size])
try:
photo2 = ImageTk.PhotoImage(photo)
except Exception as e:
print("Error was ",e)
return photo2
class App:
def __init__(self, master):
frame = tk.Frame(master)
frame.grid(row=0)
self.buttonLock = tk.Button(frame, text="Lock", underline=3, command=partial(actions.lock,config))
self.buttonLock.grid(row=0,column=0)
# WORKS master.bind_all("<Alt-k>", something)
# PASSES 2 params when expecting 1 master.bind_all("<Alt-k>", self.buttonLock.invoke)
master.bind_all("<Alt-k>", partial(actions.lock,config))
# WORKS, for basic image loading.
self.photoLogout = get_scaled_icon(config.get_logout_icon(), config.get_icon_size(), config.get_icon_theme())
self.buttonLogout = tk.Button(frame, text="Logout", underline=0, command=lambda: actions.logout(config), image=self.photoLogout, compound=tk.LEFT)
master.bind_all("<Alt-l>", partial(actions.logout,config))
Tooltip(self.buttonLogout, text="HERE IS SOMETHING!")
self.buttonLogout.grid(row=0,column=1)
#self.buttonCancel = tk.Button(frame, text="Cancel", underline=0, command=frame.quit)
self.buttonCancel = tk.Button(frame, text="Cancel", underline=0, command=self.quitaction)
self.buttonCancel.grid(row=1,columnspan=8,sticky=tk.W+tk.E)
master.bind_all("<Alt-c>", self.quitaction)
# Found this after trial and error.
def quitaction(self,b=None):
print("Cancel any logout action.")
root.destroy()
# Left here as an example for a mster.bind_all that works.
#def something(event=None):
# print("Got here!")
root = tk.Tk()
# MAIN LOOP
root.title("Log out options")
imgicon = get_scaled_icon("/usr/share/icons/Numix/96/actions/system-shutdown.svg",24)
print(imgicon)
root.tk.call('wm','iconphoto', root._w, imgicon)
app = App(root)
root.mainloop()
try:
root.destroy()
except:
pass
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