如何解决使用 GridTableBase 在网格中追加和删除行
我在追加和删除行时遇到问题。我的桌子变化很大，必须经常重建，所以这有点棘手。我的所有信息都来自 sql 数据库。我将结果加载到 Pandas DataFrame 中，然后使用它来填充 GridTableBase 类。我现在正在尝试追加和删除行，但无法覆盖该类。我已经能够在某种程度上让它工作，但它的行为很奇怪。出于某种原因，self.table.AppendRows(row) 不起作用并引发错误。原始是 self.table.AppendRow(row)，但 AppendRow 不是方法。所以我不得不使用不同的方法。我必须更改一个值才能让 GridTableMessage 意识到发生了变化，这就是我在这里所做的data.iloc[data.shape[0]-1,0] = str(val)
理想情况下，我会从表本身添加/删除行，但我不知道如何做到这一点。我的大部分代码都是从这里 https://github.com/wxWidgets/Phoenix/blob/master/demo/Grid_MegaExample.py 派生出来的，但其中很多对我来说不能正常工作。
截至目前，我可以追加一行，但由于某种原因，即使只有一个已添加到 DataFrame 并且 GetNumberRows 返回正确的计数，它也会追加 2。我认为这与我访问表类的方式有关。任何人都可以提供一些清晰度吗？
def rowPopup(self,row,evt):
"""(row,evt) -> display a popup menu when a row label is right clicked"""
appendID = wx.Window.NewControlId()#wx.NewId()
deleteID = wx.Window.NewControlId()#wx.NewId()
x = self.GetRowSize(row)/2
if not self.GetSelectedRows():
self.SelectRow(row)
menu = wx.Menu()
xo,yo = evt.GetPosition()
menu.Append(appendID,"Append Row")
menu.Append(deleteID,"Delete Row(s)")
def append(event,self=self,row=row):#event,row=row
global data
#print("Append")
#self.table.AppendRows(row)
dlg = wx.TextEntryDialog(self,'Enter a new Key ID to insert into the ' + str("'") + data.columns[0] + str("'") + ' column.','Insert New Record')
dlg.SetValue("")
if dlg.ShowModal() == wx.ID_OK:
#print('You entered: %s\n' % dlg.GetValue())
val = dlg.GetValue()
#data[~pd.isnull(data).all(1)].fillna('')
#data['tables_id'].apply('(g)'.format)
data.loc[data.iloc[-1].name + 1,:] = ""
data.iloc[data.shape[0]-1,0] = str(val)
self.Reset()
#print(data)
#data = data.append(pd.Series(dtype='object'),ignore_index=True)
#self.data = DataTable(data)
#data[~pd.isnull(data).all(1)].fillna('')
#self.data = DataTable(data)
def delete(event,row=row
global data
rows = self.GetSelectedRows()
data.drop(data.index[rows],inplace=True)
print (data)
self.Reset()
#self.table.DeleteRow(row)
#print(row)
#print(rows)
#EVT_MENU(self,appendID,append)
#EVT_MENU(self,deleteID,delete)
self.Bind(wx.EVT_MENU,append,id=appendID)
self.Bind(wx.EVT_MENU,delete,id=deleteID)
self.PopupMenu(menu,wx.Point(round(x),round(yo)))
menu.Destroy()
class DataTable(gridlib.GridTableBase):
def __init__(self,data):
gridlib.GridTableBase.__init__(self)
self.headerRows = 1
if data is None:
data = pd.DataFrame()
self.data = data
print("Instance")
#Store the row and col length to see if table has changed in size
self._rows = self.GetNumberRows()
self._cols = self.GetNumberCols()
self.odd=gridlib.GridCellAttr()
self.odd.SetBackgroundColour((217,217,217))
self.even=gridlib.GridCellAttr()
self.even.SetBackgroundColour((255,255,255))
def GetAttr(self,col,kind):
attr = [self.even,self.odd][row % 2]
attr.IncRef()
return attr
def GetNumberRows(self):
#print("# Rows:",len(self.data))
return len(self.data)# - 1
def GetTypeName(self,col):
#print(wx.grid.GRID_VALUE_STRING)
return wx.grid.GRID_VALUE_STRING
def GetNumberCols(self):
#print("# Cols:",len(self.data.columns)+ 1)
return len(self.data.columns) + 1
#return len(self.data.columns) #+ 1
def IsEmptyCell(self,col):
return False
def GetValue(self,col):
if col == 0:
try:
return self.data.index[row]
except:
print("Row,Col(",")","OOB")
return ""
else:
try:
return str(self.data.iloc[row,col - 1])
except:
print("Row,"OOB")
return ""
def GetColLabelValue(self,col):
if col == 0:
if self.data.index.name is None:
return 'Index'
else:
return self.data.index.name
return self.data.columns[col - 1]
def ResetView(self,grid):
"""
(wxGrid) -> Reset the grid view. Call this to
update the grid if rows and columns have been added or deleted
"""
print('Old::',self._rows,self._cols)
print('New::',self.GetNumberRows(),self.GetNumberCols())
print(data)
grid.BeginBatch()
for current,new,delmsg,addmsg in [
(self._rows,gridlib.GRIDTABLE_NOTIFY_ROWS_DELETED,gridlib.GRIDTABLE_NOTIFY_ROWS_APPENDED),(self._cols,self.GetNumberCols(),gridlib.GRIDTABLE_NOTIFY_COLS_DELETED,gridlib.GRIDTABLE_NOTIFY_COLS_APPENDED),]:
if new < current:
msg = gridlib.GridTableMessage(self,current-new)
#grid.ProcesstableMessage(msg)
self.GetView().ProcesstableMessage(msg)
print("OvN:",self.GetNumberRows())
return True
if new > current:
msg = gridlib.GridTableMessage(self,addmsg,new-current)
self.GetView().ProcesstableMessage(msg)
grid.ProcesstableMessage(msg)
#self.UpdateValues(grid)
msg = gridlib.GridTableMessage(self,gridlib.GRIDTABLE_REQUEST_VIEW_GET_VALUES)
grid.ProcesstableMessage(msg)
print("OvN:",self.GetNumberRows())
grid.EndBatch()
self._rows = self.GetNumberRows()
self._cols = self.GetNumberCols()
# update the column rendering plugins
#self._updateColAttrs(grid)
# XXX
# Okay,this is really stupid,we need to "jiggle" the size
# to get the scrollbars to recalibrate when the underlying
# grid changes.
h,w = grid.GetSize()
grid.SetSize((h+1,w))
grid.SetSize((h,w))
grid.ForceRefresh()
def UpdateValues(self,grid):#self,grid
"""Update all displayed values"""
# This sends an event to the grid table to update all of the values
msg = gridlib.GridTableMessage(self,gridlib.GRIDTABLE_REQUEST_VIEW_GET_VALUES)
grid.table.ProcesstableMessage(msg)
class DataGrid(gridlib.Grid):
def __init__(self,parent,data,lc,tc): # data
gridlib.Grid.__init__(self,- 1) #,colnames,-1 # data
self.lc = lc
self.tc = tc
self.table = DataTable(data)
self.SetTable(self.table,True)
self.Bind(gridlib.EVT_GRID_LABEL_RIGHT_CLICK,self.OnLabelRightClicked)
self.Bind(gridlib.EVT_GRID_CELL_RIGHT_CLICK,self.OnCellRightClick)
self.Bind(gridlib.EVT_GRID_CELL_CHANGED,self.onCellChanged) #wx.grid
def Reset(self):
"""reset the view based on the data in the table. Call
this when rows are added or destroyed"""
self.table.ResetView(self)
def OnCellRightClick(self,event):
print ("OnCellRightClick: (%d,%d)\n" % (event.GetRow(),event.GetCol()))
def OnLabelRightClicked(self,evt):
row,col = evt.GetRow(),evt.GetCol()
if row == -1: print("col")#self.colPopup(col,evt)
elif col == -1: self.rowPopup(row,evt)
def rowPopup(self,'Insert New Record')
dlg.SetValue("")
if dlg.ShowModal() == wx.ID_OK:
val = dlg.GetValue()
#data[~pd.isnull(data).all(1)].fillna('')
#data['tables_id'].apply('(g)'.format)
data.loc[data.iloc[-1].name + 1,0] = str(val)
self.Reset()
#print(data)
#self.data = DataTable(data)
def delete(event,inplace=True)
print (data)
self.Reset()
self.Bind(wx.EVT_MENU,round(yo)))
menu.Destroy()
class MainFrame(wx.Frame):
def __init__(self,data): # (self,data):
wx.Frame.__init__(self,-1,"Varkey Foundation") #,size=(640,480))
#Create a panel
self.p = wx.Panel(self)
self.Maximize(True)
#Create blank dataframe
data = pd.DataFrame() #pd.DataFrame(np.random.randint(0,100,size=(200,5)),columns=list('EFGHD')
#data.reset_index(drop=True,inplace=True)
self.data = DataTable(data)
self.nb = wx.Notebook(self.p)
self.p.SetBackgroundColour( wx.Colour( 0,0 ) ) # 38,38,38
self.nb.SetBackgroundColour(wx.Colour(58,56,56) )
#self.SetBackgroundColour( wx.Colour( 255,56 ) )
#create the page windows as children of the notebook
self.page1 = PageOne(self.nb)
self.page2 = PageTwo(self.nb)
self.page3 = PageThree(self.nb)
# add the pages to the notebook with the label to show on the tab
self.nb.AddPage(self.page1,"Data")
self.nb.AddPage(self.page2,"Analyze")
self.nb.AddPage(self.page3,"Change Log")
#CreateFonts
self.b_font = wx.Font(14,wx.ROMAN,wx.norMAL,wx.BOLD,True)
self.lbl_font = wx.Font(14,True)
self.cb_font = wx.Font(11,wx.SCRIPT,wx.ITALIC,True)
self.h_font = wx.Font(18,wx.DECORATIVE,True)
#Create username textcontrol <<<<<<<<<<<< Passed to grid class
self.tc_user =wx.TextCtrl(self.p,value='cmccall95',size = (130,25))
self.tc_password =wx.TextCtrl(self.p,value='Achilles95',style=wx.TE_PASSWORD | wx.TE_PROCESS_ENTER,25))
self.tc_password.Bind(wx.EVT_TEXT_ENTER,self.onLogin)
self.tc_user.SetFont(self.cb_font)
self.tc_password.SetFont(self.cb_font)
#Create Change log lstCtrl <<<<<<<<<<<< Passed to grid class
self.lc_change = wx.ListCtrl(self.p,style = wx.TE_MULTILINE | wx.LC_REPORT | wx.LC_VRULES)
self.lc_change.InsertColumn(0,"User ID")
self.lc_change.InsertColumn(1,"Status")
self.lc_change.InsertColumn(2,"Description")
self.lc_change.InsertColumn(3,"Date/Time")
#Set column widths
self.lc_change.SetColumnWidth(0,75)
self.lc_change.SetColumnWidth(1,75)
self.lc_change.SetColumnWidth(2,450)
self.lc_change.SetColumnWidth(3,125)
#Create the grid and continue layout
self.grid = DataGrid(self.page1,self.lc_change,self.tc_user)
#More layout code...
def onLoadNewData(self,event): #This is how I'm replacing the data in my table class
global data
self.Freeze()
if self.combo_table.GetValue():
#Connect to db
self.connect_MysqL()
#Determine db table
self.getTable()
#Get new data
sql_query = "SELECT * FROM " + tbl
self.cursor.execute(sql_query)
temp = pd.read_sql(sql_query,con=self.db_con)
temp.reset_index(drop=True,inplace=True)
data = temp[~pd.isnull(temp).all(1)].fillna('')
#Create title #if data:
if not data.empty:
self.title.SetLabel(str(self.combo_table.GetValue()))
print(str(self.combo_table.GetValue()))
self.grid.Destroy()
self.grid = DataGrid(self.page1,self.tc_user)
#self.grid.HideCol(0)
self.grid.AutoSizeColumns()
#Insert grid into existing sizer
self.p1_sizer.Insert(1,self.grid,1,wx.RIGHT| wx.LEFT|wx.EXPAND,20)
self.p1_sizer.Layout()
#RESIZE
else:
print("Error:Dataframe is empty")
self.close_connection()
else:
print('CANT BE BLANK')
self.Thaw()
if __name__ == '__main__':
import sys
app = wx.App()
frame = MainFrame(None,sys.stdout) # (None,sys.stdout)
frame.Show(True)
app.MainLoop()
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