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#!/usr/bin/env python
'''
Sample-launcher application.
'''
# Python 2/3 compatibility
from __future__ import print_function
import sys
# local modules
from common import splitfn
# built-in modules
import webbrowser
from glob import glob
from subprocess import Popen
try:
import tkinter as tk # Python 3
from tkinter.scrolledtext import ScrolledText
except ImportError:
import Tkinter as tk # Python 2
from ScrolledText import ScrolledText
#from IPython.Shell import IPShellEmbed
#ipshell = IPShellEmbed()
exclude_list = ['demo', 'common']
class LinkManager:
def __init__(self, text, url_callback = None):
self.text = text
self.text.tag_config("link", foreground="blue", underline=1)
self.text.tag_bind("link", "<Enter>", self._enter)
self.text.tag_bind("link", "<Leave>", self._leave)
self.text.tag_bind("link", "<Button-1>", self._click)
self.url_callback = url_callback
self.reset()
def reset(self):
self.links = {}
def add(self, action):
# add an action to the manager. returns tags to use in
# associated text widget
tag = "link-%d" % len(self.links)
self.links[tag] = action
return "link", tag
def _enter(self, event):
self.text.config(cursor="hand2")
def _leave(self, event):
self.text.config(cursor="")
def _click(self, event):
for tag in self.text.tag_names(tk.CURRENT):
if tag.startswith("link-"):
proc = self.links[tag]
if callable(proc):
proc()
else:
if self.url_callback:
self.url_callback(proc)
class App:
def __init__(self):
root = tk.Tk()
root.title('OpenCV Demo')
self.win = win = tk.PanedWindow(root, orient=tk.HORIZONTAL, sashrelief=tk.RAISED, sashwidth=4)
self.win.pack(fill=tk.BOTH, expand=1)
left = tk.Frame(win)
right = tk.Frame(win)
win.add(left)
win.add(right)
scrollbar = tk.Scrollbar(left, orient=tk.VERTICAL)
self.demos_lb = demos_lb = tk.Listbox(left, yscrollcommand=scrollbar.set)
scrollbar.config(command=demos_lb.yview)
scrollbar.pack(side=tk.RIGHT, fill=tk.Y)
demos_lb.pack(side=tk.LEFT, fill=tk.BOTH, expand=1)
self.samples = {}
for fn in glob('*.py'):
name = splitfn(fn)[1]
if fn[0] != '_' and name not in exclude_list:
self.samples[name] = fn
for name in sorted(self.samples):
demos_lb.insert(tk.END, name)
demos_lb.bind('<<ListboxSelect>>', self.on_demo_select)
self.cmd_entry = cmd_entry = tk.Entry(right)
cmd_entry.bind('<Return>', self.on_run)
run_btn = tk.Button(right, command=self.on_run, text='Run', width=8)
self.text = text = ScrolledText(right, font=('arial', 12, 'normal'), width = 30, wrap='word')
self.linker = _linker = LinkManager(text, self.on_link)
self.text.tag_config("header1", font=('arial', 14, 'bold'))
self.text.tag_config("header2", font=('arial', 12, 'bold'))
text.config(state='disabled')
text.pack(fill='both', expand=1, side=tk.BOTTOM)
cmd_entry.pack(fill='x', side='left' , expand=1)
run_btn.pack()
def on_link(self, url):
print(url)
webbrowser.open(url)
def on_demo_select(self, evt):
name = self.demos_lb.get( self.demos_lb.curselection()[0] )
fn = self.samples[name]
descr = ""
try:
if sys.version_info[0] > 2:
# Python 3.x
module_globals = {}
module_locals = {}
with open(fn, 'r') as f:
module_code = f.read()
exec(compile(module_code, fn, 'exec'), module_globals, module_locals)
descr = module_locals.get('__doc__', 'no-description')
else:
# Python 2
module_globals = {}
execfile(fn, module_globals) # noqa: F821
descr = module_globals.get('__doc__', 'no-description')
except Exception as e:
descr = str(e)
self.linker.reset()
self.text.config(state='normal')
self.text.delete(1.0, tk.END)
self.format_text(descr)
self.text.config(state='disabled')
self.cmd_entry.delete(0, tk.END)
self.cmd_entry.insert(0, fn)
def format_text(self, s):
text = self.text
lines = s.splitlines()
for i, s in enumerate(lines):
s = s.rstrip()
if i == 0 and not s:
continue
if s and s == '='*len(s):
text.tag_add('header1', 'end-2l', 'end-1l')
elif s and s == '-'*len(s):
text.tag_add('header2', 'end-2l', 'end-1l')
else:
text.insert('end', s+'\n')
def add_link(start, end, url):
for tag in self.linker.add(url):
text.tag_add(tag, start, end)
self.match_text(r'http://\S+', add_link)
def match_text(self, pattern, tag_proc, regexp=True):
text = self.text
text.mark_set('matchPos', '1.0')
count = tk.IntVar()
while True:
match_index = text.search(pattern, 'matchPos', count=count, regexp=regexp, stopindex='end')
if not match_index:
break
end_index = text.index( "%s+%sc" % (match_index, count.get()) )
text.mark_set('matchPos', end_index)
if callable(tag_proc):
tag_proc(match_index, end_index, text.get(match_index, end_index))
else:
text.tag_add(tag_proc, match_index, end_index)
def on_run(self, *args):
cmd = self.cmd_entry.get()
print('running:', cmd)
Popen(sys.executable + ' ' + cmd, shell=True)
def run(self):
tk.mainloop()
if __name__ == '__main__':
App().run()
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