== Introduction ==

Gives a way to append a line into a Grid table used with a Grid.

== What Objects are Involved ==

wxgrid, wxgridtablebase

== Process Overview ==

There are plenty of sample in the wxPy demo showing how to create/modify a Grid, but not to show how to insert/append a row. This is particularly difficult in the case of the Grid table as the appenrows/insertrows functions does not work.
This sample processes by destroying and creating again the Grid. As the refresh method does not work on Windows XP, a workaround is got by getting and setting the size.

== Special Concerns ==

The sample is based on gridcusttable.py from the demo.

== Code Sample ==

{{{
#!python
from wxPython.wx import *
from wxPython.grid import *
#---------------------------------------------------------------------------
class CustomDataTable(wxPyGridTableBase):
    def __init__(self,data):
        self.data= data
        wxPyGridTableBase.__init__(self)
        self.colLabels = ['ID', 'Description', 'Severity', 'Priority', 'Platform',
                          'Opened?', 'Fixed?', 'Tested?', 'TestFloat']
        self.dataTypes = [wxGRID_VALUE_NUMBER,
                          wxGRID_VALUE_STRING,
                          wxGRID_VALUE_CHOICE + ':only in a million years!,wish list,minor,normal,major,critical',
                          wxGRID_VALUE_NUMBER + ':1,5',
                          wxGRID_VALUE_CHOICE + ':all,MSW,GTK,other',
                          wxGRID_VALUE_BOOL,
                          wxGRID_VALUE_BOOL,
                          wxGRID_VALUE_BOOL,
                          wxGRID_VALUE_FLOAT + ':6,2',
                          ]
    def GetNumberRows(self):
        return len(self.data) + 1
    def GetNumberCols(self):
        return len(self.data[0])
    def IsEmptyCell(self, row, col):
        try:
            return not self.data[row][col]
        except IndexError:
            return true
    def GetValue(self, row, col):
        try:
            return self.data[row][col]
        except IndexError:
            return ''
    def SetValue(self, row, col, value):
        try:
            self.data[row][col] = value
        except IndexError:
            self.data.append([''] * self.GetNumberCols())
            self.SetValue(row, col, value)
            msg = wxGridTableMessage(self,                             # The table
                                     wxGRIDTABLE_NOTIFY_ROWS_APPENDED, # what we did to it
                                     1)                                # how many
            self.GetView().ProcessTableMessage(msg)
    def GetColLabelValue(self, col):
        return self.colLabels[col]
    def GetTypeName(self, row, col):
        return self.dataTypes[col]
    def CanGetValueAs(self, row, col, typeName):
        colType = self.dataTypes[col].split(':')[0]
        if typeName == colType:
            return true
        else:
            return False
    def CanSetValueAs(self, row, col, typeName):
        return self.CanGetValueAs(row, col, typeName)
#---------------------------------------------------------------------------
class CustTableGrid(wxGrid):
    def __init__(self, parent, data):
        wxGrid.__init__(self, parent, -1)
        self.table = CustomDataTable(data)
        self.SetTable(self.table, true)
        self.SetRowLabelSize(0)
        self.SetMargins(0,0)
        self.AutoSizeColumns(False)
        EVT_GRID_CELL_LEFT_DCLICK(self, self.OnLeftDClick)
    def OnLeftDClick(self, evt):
        if self.CanEnableCellControl():
            self.EnableCellEditControl()
#---------------------------------------------------------------------------
class TestFrame(wxFrame):
    def __init__(self, parent):
        wxFrame.__init__(self, parent, -1, "Custom Table, data driven Grid  Demo", size=(640,480))
        self.data = [
            [1010, "The foo doesn't bar", "major", 1, 'MSW', 1, 1, 1, 1.12],
            [1011, "I've got a wicket in my wocket", "wish list", 2, 'other', 0, 0, 0, 1.50],
            [1012, "Rectangle() returns a triangle", "critical", 5, 'all', 0, 0, 0, 1.56]
            ]
        self.initwin()
    def initwin(self):
        self.ref= None
        self.p = wxPanel(self, -1, style=0)
        b = wxButton(self.p, -1, "Add line...")
        b.SetDefault()
        EVT_BUTTON(self, b.GetId(), self.OnButton)
        self.bs = wxBoxSizer(wxVERTICAL)
        self.grid = CustTableGrid(self.p,self.data)
        self.bs.Add(self.grid, 1, wxGROW|wxALL, 5)
        self.bs.Add(b)
        self.p.SetSizer(self.bs)
    def OnButton(self, evt):
        self.data.append([1010, "Added line", "major", 1, 'MSW', 1, 1, 1, 1.12])
        sz= self.p.GetSize()
        self.p.Destroy()
        self.initwin()
        self.p.SetSize(sz)
        print "button selected"
#-------------------------------------------------------------------------------
class mApp(wxApp):
    def OnInit(self):
        frame= TestFrame(None)
        frame.Show(true)
        return true
#-------------------------------------------------------------------------------
app = mApp(0)
app.MainLoop()
#-------------------------------------------------------------------------------
}}}

=== Comments ===