wxpython面板加载时会自动留下文字图片

Question

import wx
import sqlite3

class Frame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None)
        self.mainPanel = wx.Panel(self)

        self.data = ['111111','2222','333','4','555']
        self.testcombo =  wx.ComboBox(self.mainPanel,-1, choices=self.data, pos=(0,0))
#        self.testcombo.Bind(wx.EVT_COMBOBOX, self.comboSave)
        self.dataLabel = wx.StaticText(self.mainPanel,-1,("Nothing Saved Yet"),pos=(100,50))
        self.dataLabel2 = wx.StaticText(self.mainPanel,-1, pos=(100,100))
        self.testbut = wx.Button(self.mainPanel, wx.ID_SAVE, pos=(0,180))
        self.testbut.Bind(wx.EVT_BUTTON, self.dataSave, id=wx.ID_SAVE )

        self.conn = sqlite3.connect("test1.db")
        self.cursor = self.conn.cursor()
        self.cursor.execute('CREATE TABLE IF NOT EXISTS TEST(TEST CHAR(5))')

        self.autorefresh()

#    def comboSave(self, e):
#        self.testcomboSave = self.testcombo.GetValue()

    def dataSave(self, e):
        self.testcomboSave = self.testcombo.GetValue()
        self.cursor.execute('INSERT INTO TEST(TEST) VALUES(?)', (self.testcomboSave, ))
        self.conn.commit()
        self.dataLabel.SetLabel(self.testcomboSave)

    def comboLoad(self):
        self.cursor.execute('SELECT *FROM TEST')
        for dbLoad in self.cursor.fetchall():pass
        self.dbLoad = dbLoad[0]
        self.dataLabel2.SetLabel(self.dbLoad)

    def autorefresh(self):
        self.comboLoad()
        wx.CallLater(1000, self.autorefresh)

if __name__ == '__main__':
    app = wx.App()
    frame = Frame()
    frame.Show()
    app.MainLoop()

当我将组合框的内容加载到sqlite3中，然后自动将其加载到面板中时，文本中有一个残影。我不知道为什么。这是一个错误吗？

ex) 111111 -> 2222

Answer 1

这不是错误，您是将一段文字与另一段文字重叠。为函数 comboLoad 中的每次迭代添加一个新的 wx.StaticText 并不是解决问题的方法。最初创建静态文本，然后随时更新它的值。
您还有冗余代码，您的 autorefresh 函数无缘无故每秒加载一次数据库内容，特别是因为数据库没有声明的键，这意味着您可以一遍又一遍地输入相同的值永远不会出错。
我已经把多余的代码注释掉了，这样你就可以看到，什么是必需的，什么是不需要的。
我相信这比我之前的 post.

更准确地满足您的需求

import wx
import sqlite3

class Frame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None)
        self.mainPanel = wx.Panel(self)

        self.data = ['111111','2222','333','4','555']
        self.testcombo =  wx.ComboBox(self.mainPanel,-1, choices=self.data, pos=(0,0))
#        self.testcombo.Bind(wx.EVT_COMBOBOX, self.comboSave)
        self.dataLabel = wx.StaticText(self.mainPanel,-1,("Nothing Saved Yet"),pos=(100,50))
        self.testbut = wx.Button(self.mainPanel, wx.ID_SAVE, pos=(0,180))
        self.testbut.Bind(wx.EVT_BUTTON, self.dataSave, id=wx.ID_SAVE )

        self.conn = sqlite3.connect("test1.db")
        self.cursor = self.conn.cursor()
        self.cursor.execute('CREATE TABLE IF NOT EXISTS TEST(TEST CHAR(5))')

#        self.autorefresh()

#    def comboSave(self, e):
#        self.testcomboSave = self.testcombo.GetValue()

    def dataSave(self, e):
        self.testcomboSave = self.testcombo.GetValue()
        self.cursor.execute('INSERT INTO TEST(TEST) VALUES(?)', (self.testcomboSave, ))
        self.conn.commit()
        self.dataLabel.SetLabel("Item Saved to database: "+self.testcomboSave)

#    def comboLoad(self):
#        self.cursor.execute('SELECT *FROM TEST')
#        for dbLoad in self.cursor.fetchall():pass
#        wx.StaticText(self.mainPanel,label=dbLoad[0],pos=(100,100)
#
#    def autorefresh(self):
#        self.comboLoad()
#        wx.CallLater(1000,self.autorefresh)

if __name__ == '__main__':
    app = wx.App()
    frame = Frame()
    frame.Show()
    app.MainLoop()

wxpython面板加载时会自动留下文字图片

Wxpython panel will automatically leave a text image when you load it

wxpython

python-3.x