295 lines
13 KiB
Python
295 lines
13 KiB
Python
#!/usr/bin/python
|
|
# -*- coding: utf-8 -*-
|
|
|
|
# unit_converter - Converts between different units
|
|
# version 0.1
|
|
# 2008/02/13
|
|
# by Patrick Beck
|
|
|
|
import pygtk
|
|
pygtk.require('2.0')
|
|
import gtk
|
|
import xml.dom.minidom
|
|
from sys import exit
|
|
|
|
try:
|
|
unitfile = 'unit.xml' # path to the unit file
|
|
file = xml.dom.minidom.parse(unitfile) # parse the xml file
|
|
except:
|
|
print 'The unitfile can not be opened or found'
|
|
exit()
|
|
|
|
class unitconvert(object):
|
|
|
|
toactive = 0 # status variable will be set to 1, when the 'to' field is the last activated field
|
|
fromactive = 0 # the same, only for the 'from' field
|
|
|
|
def delete_event(self, widget, event, data=None):
|
|
return False
|
|
|
|
def destroy(self, widget, data=None):
|
|
gtk.main_quit()
|
|
|
|
def fromentry_changed(self, widget):
|
|
self.fromactive = 1
|
|
self.toactive = 0
|
|
|
|
def toentry_changed(self, widget):
|
|
self.toactive = 1
|
|
self.fromactive = 0
|
|
|
|
def on_catcombo_changed(self, widget):
|
|
self.create_menu()
|
|
|
|
def category_isset(self): # get the selected category
|
|
categoryname = self.catcombo.get_active_text()
|
|
return categoryname
|
|
|
|
def unit_from_isset(self): # get the selected unit from the 'from' field
|
|
unit_from = self.fromcombo.get_active_text()
|
|
return unit_from
|
|
|
|
def unit_to_isset(self): # get the selected unit from the 'to' field
|
|
unit_to = self.tocombo.get_active_text()
|
|
return unit_to
|
|
|
|
def number_from_isset(self): # get the data from the 'from' entry field
|
|
getnumber_from = self.fromentry.get_text()
|
|
try: # Test if the entry is a number
|
|
number_from = float(getnumber_from.replace(',','.')) # replace the comma with a dot for the internal calculation
|
|
return number_from
|
|
except:
|
|
return 'nonnumber'
|
|
|
|
def number_to_isset(self): # get the data for the 'to' entry field
|
|
getnumber_to = self.toentry.get_text()
|
|
try: # Test if the entry is a number
|
|
number_to = float(getnumber_to.replace(',','.'))
|
|
return number_to
|
|
except:
|
|
return 'nonnumber'
|
|
|
|
def fromentry_set(self, printresult): # sets the result in the target field
|
|
self.fromentry.set_text(printresult)
|
|
|
|
def toentry_set(self, printresult): # the same as above
|
|
self.toentry.set_text(printresult)
|
|
|
|
def categorymenu(self): # creates the data for the category menu from the xml file
|
|
category = []
|
|
for categoryname in file.getElementsByTagName('category'): # browses through the elements in the file
|
|
category.append(categoryname.getAttribute('name')) # append the name to the category list
|
|
return category
|
|
|
|
def unitmenu(self): # creates the data for the unit menu
|
|
unit = []
|
|
set_category = self.category_isset() # checks for the active category to add this units
|
|
for categorynames in file.getElementsByTagName('category'): # search the categorys
|
|
if categorynames.getAttribute('name') == set_category: # search through the file according to the set category
|
|
for units in categorynames.getElementsByTagName('unit'): # get the units from the specific category
|
|
unit.append(units.getAttribute('name')) # appends the units from the category into the unit list
|
|
return unit
|
|
|
|
def create_menu(self): # fill the gui with the data from categorymenu and unitmenu
|
|
|
|
if self.category_isset() == None: # if no category menu exists
|
|
for categorys in self.categorymenu():
|
|
self.catcombo.append_text(categorys) # append the categorys to the menu
|
|
|
|
modelfrom = self.fromcombo.get_model() # get the data from the fromcombo field ...
|
|
modelfrom.clear() # ... and delete them for the new data
|
|
modelto = self.tocombo.get_model() # the same as fromcombo
|
|
modelto.clear()
|
|
|
|
for units in self.unitmenu():
|
|
self.fromcombo.append_text(units) # filling the unit menus
|
|
self.tocombo.append_text(units)
|
|
|
|
def convert(self, widget):
|
|
|
|
category_isset = self.category_isset() # get the active category from the gui
|
|
unit_to = self.unit_to_isset() # gets the active unit from the 'to' field
|
|
unit_from = self.unit_from_isset() # gets the same for the 'from' field
|
|
|
|
# a few tests for the inputs in the combo and entry field
|
|
if category_isset == None:
|
|
self.fromentry_set('Choose a category')
|
|
self.toentry_set('and the units')
|
|
|
|
elif unit_from == None and unit_to == None:
|
|
self.fromentry_set('Choose a unit')
|
|
self.toentry_set('Choose a unit')
|
|
|
|
elif unit_from == None:
|
|
self.fromentry_set('Choose a unit')
|
|
self.toentry_set('')
|
|
|
|
elif unit_to == None:
|
|
self.toentry_set('Choose a unit')
|
|
self.fromentry_set('')
|
|
|
|
# when the inputs are ok excecute the rest of the program
|
|
else:
|
|
|
|
if self.toactive == 1:
|
|
number = self.number_to_isset()
|
|
if number == 'nonnumber': # when the entry is not a number print a error
|
|
self.toentry_set('Error - put in a number')
|
|
|
|
else:
|
|
for categorynames in file.getElementsByTagName('category'): # search the categorys
|
|
if categorynames.getAttribute('name') == category_isset: # search through the file according to the set category
|
|
for units in categorynames.getElementsByTagName('unit'): # get the units from the specific category
|
|
if units.getAttribute('name') == unit_from: # the name from the unit in the category musst set in the to field
|
|
if self.fromactive == 1: # when active gets the to_ref field
|
|
toref = units.getAttribute('to_ref')
|
|
else:
|
|
fromref = units.getAttribute('from_ref') # else the from_ref field
|
|
if units.getAttribute('name') == unit_to:
|
|
if self.fromactive == 1:
|
|
fromref = units.getAttribute('from_ref')
|
|
else:
|
|
toref = units.getAttribute('to_ref')
|
|
|
|
# if self.fromactive == 1: # select the basis for the calculation => when the from field was changed use the data from this field
|
|
# number = number_from
|
|
# if self.toactive == 1:
|
|
# number = number_to
|
|
|
|
result = eval(toref) # execute the formular in the toref field and safe it to result
|
|
endresult = eval(fromref) # convert from the refunit to the target unit
|
|
printresult = str(endresult).replace('.',',') # for the better readability replace the dot with a comma
|
|
|
|
# if self.fromactive == 1:
|
|
# self.toentry_set(printresult) # sets the result into the 'from' field
|
|
# else:
|
|
self.fromentry_set(printresult) # same as above for the 'to' field
|
|
|
|
else:
|
|
number = self.number_from_isset()
|
|
if number == 'nonnumber': # when the entry is not a number print a error
|
|
self.fromentry_set('Error - put in a number')
|
|
|
|
else:
|
|
for categorynames in file.getElementsByTagName('category'): # search the categorys
|
|
if categorynames.getAttribute('name') == category_isset: # search through the file according to the set category
|
|
for units in categorynames.getElementsByTagName('unit'): # get the units from the specific category
|
|
if units.getAttribute('name') == unit_from: # the name from the unit in the category musst set in the to field
|
|
if self.fromactive == 1: # when active gets the to_ref field
|
|
toref = units.getAttribute('to_ref')
|
|
else:
|
|
fromref = units.getAttribute('from_ref') # else the from_ref field
|
|
if units.getAttribute('name') == unit_to:
|
|
if self.fromactive == 1:
|
|
fromref = units.getAttribute('from_ref')
|
|
else:
|
|
toref = units.getAttribute('to_ref')
|
|
|
|
# if self.fromactive == 1: # select the basis for the calculation => when the from field was changed use the data from this field
|
|
# number = number_from
|
|
# if self.toactive == 1:
|
|
# number = number_to
|
|
|
|
result = eval(toref) # execute the formular in the toref field and safe it to result
|
|
endresult = eval(fromref) # convert from the refunit to the target unit
|
|
printresult = str(endresult).replace('.',',') # for the better readability replace the dot with a comma
|
|
|
|
# if self.fromactive == 1:
|
|
self.toentry_set(printresult) # sets the result into the 'from' field
|
|
# else:
|
|
# self.fromentry_set(printresult) # same as above for the 'to' field
|
|
|
|
def clear(self, widget): # clears the entry fields
|
|
self.fromentry.set_text('')
|
|
self.toentry.set_text('')
|
|
|
|
def fromentry_cursor(self, widget, data=None):
|
|
self.fromentry.set_text('')
|
|
|
|
def toentry_cursor(self, widget, data=None):
|
|
self.toentry.set_text('')
|
|
|
|
def __init__(self):
|
|
self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
|
|
self.window.set_title('Unit Converter')
|
|
self.window.connect('delete_event', self.delete_event)
|
|
self.window.connect('destroy', self.destroy)
|
|
|
|
# create a box in the dimensions of the window and add it to them
|
|
self.box = gtk.VBox(False,2)
|
|
self.window.add(self.box)
|
|
|
|
# create a Hbox for the category and add them to self.box
|
|
self.catbox = gtk.HBox(True,2)
|
|
|
|
# frame for the category box
|
|
self.catframe = gtk.Frame('Category')
|
|
self.box.pack_start(self.catframe, False, False, 0)
|
|
|
|
# a combobox for the categorys
|
|
self.catcombo = gtk.combo_box_new_text()
|
|
self.catcombo.connect('changed', self.on_catcombo_changed)
|
|
self.catbox.pack_start(self.catcombo, False, False, 0)
|
|
self.catframe.add(self.catbox)
|
|
#create a vbox for the From units
|
|
self.frombox = gtk.VBox(False,2)
|
|
|
|
#frame for the from box
|
|
self.fromframe = gtk.Frame('Convert from ...')
|
|
self.box.pack_start(self.fromframe, False, False, 0)
|
|
self.fromframe.add(self.frombox)
|
|
|
|
#create a entry for the 'Convert from' field
|
|
self.fromentry = gtk.Entry()
|
|
self.fromentry.set_text('Input a number here ')
|
|
self.fromentry.connect('changed', self.fromentry_changed)
|
|
self.fromentry.connect('activate', self.convert)
|
|
self.fromentry.connect('focus_in_event', self.fromentry_cursor)
|
|
self.frombox.pack_start(self.fromentry, False, False, 0)
|
|
|
|
#a combobox for the from unit
|
|
self.fromcombo = gtk.combo_box_new_text()
|
|
self.frombox.pack_start(self.fromcombo, False, False, 0)
|
|
|
|
#create a vbox for the To units
|
|
self.tobox = gtk.VBox(False,2)
|
|
|
|
#frame for the to box
|
|
self.toframe = gtk.Frame('Convert to ...')
|
|
self.box.pack_start(self.toframe, False, False, 0)
|
|
self.toframe.add(self.tobox)
|
|
|
|
#create a entry for the 'Convert to' field
|
|
self.toentry = gtk.Entry()
|
|
self.toentry.set_text('... or here')
|
|
self.toentry.connect('changed', self.toentry_changed)
|
|
self.toentry.connect('activate', self.convert)
|
|
self.toentry.connect('focus_in_event', self.toentry_cursor)
|
|
self.tobox.pack_start(self.toentry, False, False, 0)
|
|
|
|
#a combobox for the to unit
|
|
self.tocombo = gtk.combo_box_new_text()
|
|
self.tobox.pack_start(self.tocombo, False, False , 0)
|
|
|
|
#create a box for the go and clear button
|
|
self.sendbox = gtk.HBox(True,2)
|
|
self.box.pack_end(self.sendbox, False, False, 0)
|
|
|
|
self.gobutton = gtk.Button('Go')
|
|
self.sendbox.pack_start(self.gobutton, True, True, 0)
|
|
self.gobutton.connect('clicked', self.convert)
|
|
|
|
self.clearbutton = gtk.Button('Clear')
|
|
self.sendbox.pack_start(self.clearbutton, True, True, 0)
|
|
self.clearbutton.connect('clicked', self.clear)
|
|
|
|
# Display all elements
|
|
self.window.show_all()
|
|
|
|
def main():
|
|
gtk.main()
|
|
return 0
|
|
|
|
if __name__ == '__main__':
|
|
unitconvert().create_menu()
|
|
main()
|