wxpython grid GRIDTABLE_NOTIFY_ROWS_DELETED

[Piet]

Hello,
I have written a small program which dynamically displays data from a
data structure in a wx.grid. The grid reacts as expected when the data
structure is enlarged: a new row is added and filled with data. When
data is removed, the data is deleted as expected, but instead of being
removed, a row is being added to the grid. Can anyone explain why?
Here is sample code to illustrate what I mean.
Thanks in advance
Piet
import wx
import wx.grid
#---------------------------------------------------------------------------

class XmlTableModel(wx.grid.PyGridTableBase):
def __init__(self,headers,data):
wx.grid.PyGridTableBase.__init__(self)
self.headers = headers
self.data = data

def GetNumberRows(self):
return len(self.data)

def GetNumberCols(self):
return len(self.headers)

def RemoveData(self,rowNum):
self.data.pop()
self.GetView().ProcessTableMessage(wx.grid.GridTab leMessage(self,wx.grid.GRIDTABLE_NOTIFY_ROWS_DELET ED,1))

def AddData(self,data):
self.data.append(data)
self.GetView().ProcessTableMessage(wx.grid.GridTab leMessage(self,wx.grid.GRIDTABLE_NOTIFY_ROWS_APPEN DED,1))

def IsEmptyCell(self, row, col):
try:
if self.data[row][col] != "":
return True
else:
return False
except:
return False

def GetValue(self, row, col):
return self.data[row][col]

def SetValue(self, row, col, value):
self.data[row][col] = value

def GetColLabelValue(self, col):
return self.headers[col]

def GetDefaultColLabelSize(self):
return 100

def GetRowLabelValue(self, row):
return self.data[row][0]
#---------------------------------------------------------------------------

class TestFrame(wx.Frame):
def __init__(self, parent):
wx.Frame.__init__(self, parent, -1, "Simple Table Model Demo",
size=(640,480))
self.panel = wx.Panel(self, -1, style=0)
self.grid = wx.grid.Grid(self.panel)
self.headers = ["Eins","Zwei","Drei","Vier"]
self.data = [["A1","A2","A3","A4"],
["B1","B2","B3","B4"],
["C1","C2","C3","C4"],
["D1","D2","D3","D4"]]
self.grid.SetTable(XmlTableModel(self.headers,self .data),
True)
self.AddBtn = wx.Button(self.panel, -1, "Add Entry")
self.AddBtn.SetDefault()
self.Bind(wx.EVT_BUTTON, self.OnAddEntry, self.AddBtn)
self.RemoveBtn = wx.Button(self.panel, -1, "Remove Entry")
self.Bind(wx.EVT_BUTTON, self.OnRemoveEntry, self.RemoveBtn)
self.bs = wx.BoxSizer(wx.VERTICAL)
self.bs.Add(self.grid, 1, wx.GROW|wx.ALL, 5)
self.bs.Add(self.AddBtn)
self.bs.Add(self.RemoveBtn)
self.panel.SetSizer(self.bs)

def OnAddEntry(self, evt):
self.grid.GetTable().AddData(["NA1","NA2","NA3","NA4"])

def OnRemoveEntry(self, evt):
self.grid.GetTable().RemoveData(0)

#---------------------------------------------------------------------------

if __name__ == '__main__':
import sys
app = wx.PySimpleApp()
frame = TestFrame(None)
frame.Show(True)
app.MainLoop()
#---------------------------------------------------------------------------

[Jean Brouwers]

Change the message call in RemoveData() to

self.GetView().ProcessTableMessage(wx.grid.GridTab leMessage(
self,wx.grid.GRIDTABLE_NOTIFY_ROWS_DELETED, len(data), 1))

The ..._ROW_DELETED message requires two args, the index of the first
row and the number of rows to be removed. Similarly for colums.

/Jean Brouwers
ProphICy Semiconductor, Inc.

PS) Also, check the DoUpdate() method in this example

<http://www.bitpim.org/pyxr/c/projects/bitpim/bpmedia.py.html>
In article <39**************************@posting.google.com >, Piet
<pi********@gmx.de> wrote:

Hello,
I have written a small program which dynamically displays data from a
data structure in a wx.grid. The grid reacts as expected when the data
structure is enlarged: a new row is added and filled with data. When
data is removed, the data is deleted as expected, but instead of being
removed, a row is being added to the grid. Can anyone explain why?
Here is sample code to illustrate what I mean.
Thanks in advance
Piet
import wx
import wx.grid
#---------------------------------------------------------------------------

class XmlTableModel(wx.grid.PyGridTableBase):
def __init__(self,headers,data):
wx.grid.PyGridTableBase.__init__(self)
self.headers = headers
self.data = data

def GetNumberRows(self):
return len(self.data)

def GetNumberCols(self):
return len(self.headers)

def RemoveData(self,rowNum):
self.data.pop()

self.GetView().ProcessTableMessage(wx.grid.GridTab leMessage(self,wx.grid.GRIDT
ABLE_NOTIFY_ROWS_DELETED,1))

def AddData(self,data):
self.data.append(data)

self.GetView().ProcessTableMessage(wx.grid.GridTab leMessage(self,wx.grid.GRIDT
ABLE_NOTIFY_ROWS_APPENDED,1))

def IsEmptyCell(self, row, col):
try:
if self.data[row][col] != "":
return True
else:
return False
except:
return False

def GetValue(self, row, col):
return self.data[row][col]

def SetValue(self, row, col, value):
self.data[row][col] = value

def GetColLabelValue(self, col):
return self.headers[col]

def GetDefaultColLabelSize(self):
return 100

def GetRowLabelValue(self, row):
return self.data[row][0]
#---------------------------------------------------------------------------

class TestFrame(wx.Frame):
def __init__(self, parent):
wx.Frame.__init__(self, parent, -1, "Simple Table Model Demo",
size=(640,480))
self.panel = wx.Panel(self, -1, style=0)
self.grid = wx.grid.Grid(self.panel)
self.headers = ["Eins","Zwei","Drei","Vier"]
self.data = [["A1","A2","A3","A4"],
["B1","B2","B3","B4"],
["C1","C2","C3","C4"],
["D1","D2","D3","D4"]]
self.grid.SetTable(XmlTableModel(self.headers,self .data),
True)
self.AddBtn = wx.Button(self.panel, -1, "Add Entry")
self.AddBtn.SetDefault()
self.Bind(wx.EVT_BUTTON, self.OnAddEntry, self.AddBtn)
self.RemoveBtn = wx.Button(self.panel, -1, "Remove Entry")
self.Bind(wx.EVT_BUTTON, self.OnRemoveEntry, self.RemoveBtn)
self.bs = wx.BoxSizer(wx.VERTICAL)
self.bs.Add(self.grid, 1, wx.GROW|wx.ALL, 5)
self.bs.Add(self.AddBtn)
self.bs.Add(self.RemoveBtn)
self.panel.SetSizer(self.bs)

def OnAddEntry(self, evt):
self.grid.GetTable().AddData(["NA1","NA2","NA3","NA4"])

def OnRemoveEntry(self, evt):
self.grid.GetTable().RemoveData(0)

#---------------------------------------------------------------------------

if __name__ == '__main__':
import sys
app = wx.PySimpleApp()
frame = TestFrame(None)
frame.Show(True)
app.MainLoop()
#---------------------------------------------------------------------------