I want to dynamically update a list of elements shown as a checkbox
list. A file is used to store the elements, and elements can be added
and deleted from the list. The trouble is that the window is not
properly updated after deleting/adding items.
I use the Detach()/Destroy() to remove the sizer, and then I create a
new and updated sizer again. Apparently, not in a correct way...
#################File createleftpanel.py############################
import wx
from gettext import gettext as _
from project import Project
"""
The class createLeftPanel
"""
class createLeftPanel(wx.Panel):
def __init__(self, parent):
wx.Panel.__init__(self, parent)
#Initialization
self.SetBackgroundColour('White')
self.filename = 'tempfile.sim'
#Initiate file:
initList = ['alfa', 'bravo', 'ekko']
Project(self.filename).writeProject(initList)
readList = Project(self.filename).readProject()
#Boxes
self.mainbox = wx.BoxSizer(wx.VERTICAL)
self.aSavedSizer = self.MakeSavedSizer(readList)
#Adding everything to mainbox
self.mainbox.Add(self.aSavedSizer, 0, wx.RIGHT | wx.LEFT, 3)
self.mainbox.Fit(self)
self.SetSizer(self.mainbox)
self.Layout()
def OnDelete(self, event):
#Deleting element from file
for counter in range(0, len(self.elementList)):
if self.elementList[counter][0].GetValue() == True:
Project(self.filename).removeLineFromProject(\
self.elementList[counter][2])
#Detaching and destroying the previous savedSizer
self.mainbox.Detach(self.aSavedSizer)
self.aSavedSizer.Destroy()
#Adding new aSavedSizer from file
aSavedList = Project(self.filename).readProject()
self.aSavedSizer = self.MakeSavedSizer(aSavedList)
self.mainbox.Add(self.aSavedSizer, 0, wx.RIGHT | wx.LEFT, 3)
self.mainbox.Fit(self)
self.SetSizer(self.mainbox)
self.Layout()
def OnAdd(self, event):
#Adding element to file
Project(self.filename).appendLineToProject(self.addText.GetValue())
#Detaching and destroying the previous savedSizer
self.mainbox.Detach(self.aSavedSizer)
self.aSavedSizer.Destroy()
#Adding new aSavedSizer from file
aSavedList = Project(self.filename).readProject()
self.aSavedSizer = self.MakeSavedSizer(aSavedList)
self.mainbox.Add(self.aSavedSizer, 0, wx.RIGHT | wx.LEFT, 3)
self.mainbox.Fit(self)
self.SetSizer(self.mainbox)
self.Layout()
def MakeSavedSizer(self, savedList):
#Putting saved items into static box together with checkbox for
deleting
savedBox = wx.StaticBox(self, -1, _('Saved words'))
savedSizer = wx.StaticBoxSizer(savedBox, wx.VERTICAL)
self.elementList = []
for item in savedList:
self.element = wx.CheckBox(self, -1, item,
pos=wx.DefaultPosition, \
size=wx.DefaultSize)
print item
self.elementList.append((self.element,
self.element.GetId(), item))
savedSizer.Add(self.element, 0, wx.ALL, 5)
#Delete button
deleteBox = wx.BoxSizer(wx.HORIZONTAL)
deleteText = wx.StaticText(self, -1, '', size=(125,-1))
deleteButton = wx.Button(self, -1, _('Delete'))
deleteBox.Add(deleteText, 0, wx.ALL, 1)
deleteBox.Add(deleteButton, 0, wx.ALL, 1)
self.Bind(wx.EVT_BUTTON, self.OnDelete, deleteButton)
#Add element + button
addBox = wx.BoxSizer(wx.HORIZONTAL)
self.addText = wx.TextCtrl(self, -1, value=_(''), size = (125,
-1), \
validator=wx.DefaultValidator)
self.addText.SetMaxLength(12)
addButton = wx.Button(self, -1, _('Add'))
addBox.Add(self.addText, 0, wx.ALL, 1)
addBox.Add(addButton, 0, wx.ALL, 1)
self.Bind(wx.EVT_BUTTON, self.OnAdd, addButton)
#Add to savedSizer
savedSizer.Add(deleteBox, 0, wx.EXPAND, 0)
savedSizer.Add(addBox, 0, wx.EXPAND, 0)
#self.SetSizer(savedSizer)
self.Fit()
return savedSizer
""" Testing routines for testing this module only"""
class Frame(wx.Frame):
def __init__(self, parent):
wx.Frame.__init__(self, parent=None, id=-1)
self.panel = createLeftPanel(self)
self.statusbar = self.CreateStatusBar()
class App(wx.App):
def OnInit(self):
wx.App.__init__(self)
self.frame = Frame(-1)
self.frame.Show()
self.SetTopWindow(self.frame)
return True
def OnExit(self):
pass
if __name__ == '__main__':
app = App()
app.MainLoop()
#################File project.py############################
import os
"""
The Project class handles reading/writing strings from/to file
"""
class Project(object):
def __init__(self, filename):
self.fname = filename
def readProject(self):
fp = open(self.fname, 'r')
flist = []
for line in fp:
flist.append(line.strip())
fp.close()
return flist
def writeProject(self, flist):
fp = open(self.fname, 'w')
for item in flist:
fp.write('%s%s' % (item, os.linesep))
fp.close()
def appendLineToProject(self, aString):
#Check if aString is not in file already
fp = open(self.fname, 'r+')
beforeList = self.readProject()
fp.close()
if aString not in beforeList:
fp = open(self.fname, 'a')
fp.write('%s%s' % (aString, os.linesep))
fp.close()
def removeLineFromProject(self, aString):
#Remove all instances of aString
fp = open(self.fname, 'r+')
beforeList = self.readProject()
afterList = []
if aString in beforeList:
for item in beforeList:
if aString.strip() != item.strip():
afterList.append(item)
else:
pass
else:
afterList = beforeList
self.writeProject(afterList)
fp.close()
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