if sys.platform[:3] == 'win': # spawn in parallel
run = StartArgs if cmdargs else Start # 2.1: support args
run(thecmd, thecmd)() # or always Spawn
else:
Fork(thecmd, thecmd)() # spawn in parallel
os.chdir(mycwd) # go back to my dir

def onPickFont(self):
"""
2.0 non-modal font spec dialog
2.1: pass per-dialog inputs to callback, may be > 1 font dialog open
"""
from PP4E.Gui.ShellGui.formrows import makeFormRow
popup = Toplevel(self)
popup.title('PyEdit - font')
var1 = makeFormRow(popup, label='Family', browse=False)
var2 = makeFormRow(popup, label='Size', browse=False)
var3 = makeFormRow(popup, label='Style', browse=False)
var1.set('courier')
var2.set('12') # suggested vals
var3.set('bold italic') # see pick list for valid inputs
Button(popup, text='Apply', command=
lambda: self.onDoFont(var1.get(), var2.get(), var3.get())).pack()

def onDoFont(self, family, size, style):
try:
self.text.config(font=(family, int(size), style))
except:
showerror('PyEdit', 'Bad font specification')

############################################################################

Utilities, useful outside this class

############################################################################

def isEmpty(self):
return not self.getAllText()

def getAllText(self):
return self.text.get('1.0', END+'-1c') # extract text as str string
def setAllText(self, text):
"""
caller: call self.update() first if just packed, else the
initial position may be at line 2, not line 1 (2.1; Tk bug?)
"""
self.text.delete('1.0', END) # store text string in widget
self.text.insert(END, text) # or '1.0'; text=bytes or str
self.text.mark_set(INSERT, '1.0') # move insert point to top
self.text.see(INSERT) # scroll to top, insert set
def clearAllText(self):
self.text.delete('1.0', END) # clear text in widget

def getFileName(self):
return self.currfile
def setFileName(self, name): # see also: onGoto(linenum)

712 | Chapter 11: Complete GUI Programs