Hello, everybody!
I’m tearing my hair out trying to understand what I’m doing wrong here. I wrote a couple of classes to make my life simpler (hah!), each encapsulating a ListCtrl and a couple of mixins. Naturally I have stolen liberally and shamelessly from the wxDemo.
My SortedCheckList does just what I want it to - the user can click on each column header, and the sort order changes appropriately. My SortedList, however, does NOT work right: if you click on a column header, you get descending order - ONLY. Click as often as you want, it’s still BA order. I’ve looked at it till I’m cross-eyed but I can’t see what the crucial difference between the two classes could be.
I have another question, also related to my SortedList. How can I save the sorting column, sorting direction, and selected row, reload the data, and then restore the state? I realize that that’s more or less what the Virtual list is for, but this approach seems to better match my needs.
Sorry for the length of the post - both classes follow.
#=============SortCheck.pyw - this one works============
import wx, sys
from types import *
from wx.lib.mixins.listctrl import ColumnSorterMixin, CheckListCtrlMixin, ListCtrlAutoWidthMixin
class SortedCheckList(wx.ListCtrl, CheckListCtrlMixin, ColumnSorterMixin, ListCtrlAutoWidthMixin):
‘’’
Combines the CheckListCtrl and ColumnSorter mixins for the ListCtrl widget.
Also modularizes management of columns and headers. Unfortunately this adds some constraints:
- If the data structure is a dictionary:
- it must have a numeric index
- key 0 must correspond to the header record
- If the data structure is a list:
- the first item in the list must be the header record
One drawback of making column creation automatic is that column width and style are set to defaults.
Future versions may add more control...
'''
def __init__(self, parent, inThing, log=None):
self.log = log
header = []
if isinstance(inThing, DictType): # inThing is a dictionary
if inThing.has_key(0):
header = inThing[0]
del inThing[0]
self.thing = inThing
elif isinstance(inThing, ListType):
header = inThing[0]
del inThing[0]
self.thing = {}
for num, item in enumerate(inThing):
self.thing[num+1] = item # needs to be 1-based, not 0-based
wx.ListCtrl.__init__(self, parent, -1, style=wx.LC_REPORT)
CheckListCtrlMixin.__init__(self)
ListCtrlAutoWidthMixin.__init__(self)
ColumnSorterMixin.__init__(self, len(self.thing))
self.itemDataMap = self.thing
Widths = []
for colNum, colData in enumerate(header):
self.InsertColumn(colNum, colData)
Widths.append(len(colData))
for key, data in self.thing.items():
for colNum, colData in enumerate(data):
Widths[colNum] = max(Widths[colNum], len(str(colData)), 5) # get max length for each column, at least 5
if (colNum==0):
index = self.InsertStringItem(sys.maxint, data[0])
tmpFont = self.GetItemFont(index)
else:
self.SetStringItem
(index, colNum, str(colData))
self.SetItemData(index, key)
dc = wx.ScreenDC()
dc.SetFont(tmpFont)
for colNum, colWidth in enumerate(Widths):
width, h = dc.GetTextExtent
(‘N’*colWidth) # capital W is too wide, capital I too narrow
self.SetColumnWidth(colNum, width)
# for wxMSW
self.Bind(wx.EVT_COMMAND_RIGHT_CLICK, self.OnRightClick
)
# for wxGTK
self.Bind(wx.EVT_RIGHT_UP, self.OnRightClick)
def GetListCtrl(self):
return self
def OnRightClick(self, event):
# only do this part the first time so the events are only bound once
if not hasattr(self, "popupID1"):
self.popupID1 = wx.NewId()
self.popupID2 = wx.NewId()
self.popupID3 = wx.NewId()
self.popupID4 = wx.NewId
()
self.Bind(wx.EVT_MENU, self.OnPopupOne, id=self.popupID1)
self.Bind(wx.EVT_MENU, self.OnPopupTwo, id=self.popupID2)
self.Bind(wx.EVT_MENU, self.OnPopupThree, id=self.popupID3
)
self.Bind(wx.EVT_MENU, self.OnPopupFour, id=self.popupID4)
# make a menu
menu = wx.Menu()
# add some items
menu.Append(self.popupID1, "Select highlighted items")
menu.Append(self.popupID2, "Deselect highlighted items")
menu.Append(self.popupID3, "Select all")
menu.Append(self.popupID4, "Deselect all")
# Popup the menu. If an item is selected then its handler
# will be called before PopupMenu returns.
self.PopupMenu(menu)
menu.Destroy()
def OnPopupOne(self, event):
index = self.GetFirstSelected()
while index != -1:
self.CheckItem(index)
index = self.GetNextSelected(index)
def OnPopupTwo(self, event):
index = self.GetFirstSelected()
while index != -1:
self.CheckItem
(index, False)
index = self.GetNextSelected(index)
def OnPopupThree(self, event):
num = self.GetItemCount()
for i in range(num):
self.CheckItem(i)
def OnPopupFour(self, event):
num = self.GetItemCount()
for i in range(num):
self.CheckItem(i, False)
#========SortList.pyw===============
import wx, sys#, images
from types import *
from wx.lib.mixins.listctrl
import ColumnSorterMixin, ListCtrlAutoWidthMixin
class SortedList(wx.ListCtrl, ColumnSorterMixin, ListCtrlAutoWidthMixin):
‘’’
Modularize management of columns and headers. Unfortunately this adds some constraints:
- If the data structure is a dictionary:
- it must have a numeric index
- key 0 must correspond to the header record
- If the data structure is a list:
- the first item in the list must be the header record
One drawback of making column creation automatic is that column width and style are set to defaults.
Future versions may add more control...
'''
def __init__(self, parent, inThing, log=None):
wx.ListCtrl.__init__(self, parent, -1, pos=wx.DefaultPosition, size=wx.DefaultSize, style=wx.LC_REPORT
> wx.BORDER_NONE
> wx.WANTS_CHARS
)
ListCtrlAutoWidthMixin.__init__(self)
self.log = log
header = []
if isinstance(inThing, DictType): # inThing is a dictionary
if inThing.has_key(0):
header = inThing[0]
del inThing[0]
self.thing = inThing
elif isinstance(inThing, ListType): #inThing is a list, so make a dictionary out of it
header = inThing[0]
del inThing[0]
self.thing = {}
for num, item in enumerate(inThing):
self.thing[num+1] = item # needs to be 1-based, not 0-based
ColumnSorterMixin.__init__(self, len(self.thing)) # number of columns equals width of header record
self.itemDataMap = self.thing
self.Widths = []
for colNum, colData in enumerate(header):
self.InsertColumn(colNum, colData)
self.Widths.append(len(colData))
self.refreshList(init=True)
dc = wx.ScreenDC()
for colNum, colWidth in enumerate(self.Widths
):
width, h = dc.GetTextExtent(‘N’*colWidth) # capital W is too wide, capital I too narrow
self.SetColumnWidth(colNum, width)
def getColumnText(self, index, col):
item = self.GetItem(index, col)
return item.GetText()
def refreshList(self, init = False):
for key, data in self.thing.items():
for colNum, colData in enumerate(data):
if init: # first time only - otherwise just update existing items
self.Widths[colNum] = max(self.Widths[colNum], len(colData), 5) # get max length for each column, at least 5
if (colNum==0):
index = self.InsertStringItem(sys.maxint, data[0])
self.tmpFont = self.GetItemFont(index)
else:
index = key -1
self.SetStringItem(index, colNum, colData)
self.SetItemData(index, key)
def GetListCtrl(self):
return self
···
#=========================================================================
TIA for your advice…