Question

我最初在Python中创建后更新了wx网格时遇到了问题。我正按照这里的步骤进行操作： http://wiki.wxpython.org/wxGrid 但由于某种原因，网格显示不正确。尽管数据增长或缩小，仍会继续添加和添加行。

这是代码。单击刷新按钮可重新初始化网格应显示的数据。错误（我认为）是在函数refreshGrid中，但我无法弄清楚是什么导致它！

import wx
from wxPython.wx import *
from wxPython.grid import *
import wx.grid
import wx.grid as gridlib
from wx.grid import Grid
import os
import sys

class MyForm(wx.Frame):

    def __init__(self):
        self.refreshMyData()

        #- Initialize the window:
        wx.Frame.__init__(self, None, wx.ID_ANY, "Grid with Popup Menu", size=(1100,300))

        # Add a panel so it looks correct on all platforms
        self.panel = wx.Panel(self, wx.ID_ANY)

        num_of_columns = 3
        self.grid = gridlib.Grid(self.panel)
        self.grid.CreateGrid(len(self.myDataList), num_of_columns)

        # change a couple column labels
        self.grid.SetColLabelValue(0, "Name")
        self.grid.SetColLabelValue(1, "Tag")
        self.grid.SetColLabelValue(2, "ID")

        self.refreshGrid()

        toolbar = self.CreateToolBar()

        qtool = toolbar.AddLabelTool(wx.ID_ANY, 'Refresh', wx.Bitmap(os.path.join(os.path.dirname(__file__), 'refresh.png')))
        toolbar.AddSeparator()
        self.Bind(wx.EVT_TOOL, self.refreshButton, qtool)

        toolbar.Realize()
        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(self.grid, 1, wx.EXPAND, num_of_columns)
        self.panel.SetSizer(sizer)

    def refreshMyData(self):
        print '------------refreshing my data'
        import random
        self.myDataList = []
        for i in range(random.randrange(10)):
            self.myDataList.append({'Name':str(i), 'Tag':str(i), 'ID':str(i)})

    def refreshButton(self, event):
        self.refreshMyData()
        self.refreshGrid()

    def refreshGrid(self):
        print '\n\n\n------------refresh grid'
        #- Clear the grid:
        self.grid.ClearGrid()
        print 'Number of current rows: ' + str(self.grid.GetNumberRows())
        print 'Size of myDataList: ', len(self.myDataList)
        self.grid.BeginBatch()
        current, new, delmsg, addmsg = (len(self.myDataList), self.grid.GetNumberRows(), wxGRIDTABLE_NOTIFY_ROWS_DELETED, wxGRIDTABLE_NOTIFY_ROWS_APPENDED)
        if new < current:
                print 'deleting rows:', current-new
                msg = wx.grid.GridTableMessage(
                        self.grid.GetTable(),
                        delmsg,
                        new,    # position
                        current-new,
                )
                self.grid.ProcessTableMessage(msg)
        elif new > current:
                print 'adding rows: ', new-current
                msg = wx.grid.GridTableMessage(
                        self.grid.GetTable(),
                        addmsg,
                        new-current
                )
                self.grid.ProcessTableMessage(msg)

        msg = wx.grid.GridTableMessage(self.grid.GetTable(), wxGRIDTABLE_REQUEST_VIEW_GET_VALUES)
        self.grid.ProcessTableMessage(msg)
        self.grid.EndBatch()

        print 'Number of current rows after data refresh and grid update: ' + str(self.grid.GetNumberRows())

        #- Populate the grid with new data:
        for i in range(len(self.myDataList)):
            self.grid.SetCellValue(i, 0, self.myDataList[i]['Name'])
            self.grid.SetCellValue(i, 1, self.myDataList[i]['Tag'])
            self.grid.SetCellValue(i, 2, self.myDataList[i]['ID'])

# Run the program
if __name__ == "__main__":
    app = wx.PySimpleApp()
    frame = MyForm().Show()
    app.MainLoop()

Answer 1

荡。我想到了。这是解决方案：

def refreshGrid(self):
    print '\n\n\n------------refresh grid'
    #- Clear the grid:
    self.grid.ClearGrid()
    print 'Number of current rows: ' + str(self.grid.GetNumberRows())
    print 'Size of myDataList: ', len(self.myDataList)

    current, new = (self.grid.GetNumberRows(), len(self.myDataList))

    if new < current:
        #- Delete rows:
        self.grid.DeleteRows(0, current-new, True)

    if new > current:
        #- append rows:
        self.grid.AppendRows(new-current)


    #- Populate the grid with new data:
    print 'Num of rows has been modified to:', self.grid.GetSize()
    for i in range(len(self.myDataList)):
        self.grid.SetCellValue(i, 0, self.myDataList[i]['Name'])
        self.grid.SetCellValue(i, 1, self.myDataList[i]['Tag'])
        self.grid.SetCellValue(i, 2, self.myDataList[i]['ID'])

更改网格数据时更改网格的大小

1 个答案: