python - 验证 TextCtrl 中的字符串

Question

我写了这段代码:

# -*- coding: utf-8 -*-
import wx
import wx.animate
import wx.lib.agw.hyperlink as hl

ID_BUTTON_ACCEPT = 700
ID_BUTTON_CANCEL = 701
ID_TEXT_INPUT_LOG = 702
ID_TEXT_LABLE_LOG = 703
ID_TEXT_INPUT_PSW = 704
ID_TEXT_LABEL_PSW = 705
ID_NEW_MEMBER_TXT = 706
ID_PRELOADER = 707

class TextObjectValidator(wx.PyValidator):

    def __init__(self):
        wx.PyValidator.__init__(self)

    def Clone(self):
        return TextObjectValidator()

    def Validate(self, win):
        textCtrl = self.GetWindow()
        text = textCtrl.GetValue()

        if len(text) == 0:
            wx.MessageBox("A text object must contain some text!", "Error")
            textCtrl.SetBackgroundColour("pink")
            textCtrl.SetFocus()
            textCtrl.Refresh()
            return False
        else:
            textCtrl.SetBackgroundColour(wx.SystemSettings_GetColour(wx.SYS_COLOUR_WINDOW))
            textCtrl.Refresh()
            return True

    def TransferToWindow(self):
        return True

    def TransferFromWindow(self):
        return True


class CloudStorage(wx.Frame):

    def __init__(self, parent, id, title):
        wx.Frame.__init__(self, parent, -1, title, style=wx.DEFAULT_FRAME_STYLE ^ wx.RESIZE_BORDER)

        # inputs
        self.login_label = wx.StaticText(self, ID_TEXT_LABLE_LOG, label='Логин', pos=(15, 15))
        self.login_input = wx.TextCtrl(self, ID_TEXT_INPUT_LOG, "", size=(210, -1), pos=(75, 10),
                                       validator = TextObjectValidator())
        self.pass_label = wx.StaticText(self, ID_TEXT_LABEL_PSW, label='Пароль', pos=(15, 55))
        self.pass_input = wx.TextCtrl(self, ID_TEXT_INPUT_PSW, size=(210, -1), pos=(75, 50), style=wx.TE_PASSWORD,
                                      validator = TextObjectValidator())

        # buttons
        self.accept_button = wx.Button(self, id=ID_BUTTON_ACCEPT, label='Войти', pos=(15, 95))
        self.accept_button.SetBackgroundColour('#BFD8DF')
        self.accept_button.SetForegroundColour("#2F4D57")
        self.accept_button.SetFont((wx.Font(8, wx.DEFAULT, wx.NORMAL, wx.BOLD, 0)))
        self.cancel_button = wx.Button(self, id=ID_BUTTON_CANCEL, label='Отмена', pos=(110, 95))

        # hyperlink to register
        self.new_member_label = hl.HyperLinkCtrl(self, ID_NEW_MEMBER_TXT, 'Зарегистрироваться...', pos=(15,130))
        self.new_member_label.EnableRollover(True)
        self.new_member_label.SetUnderlines(False, False, True)
        self.new_member_label.AutoBrowse(False)
        self.new_member_label.SetFont(wx.Font(8, wx.DEFAULT, wx.NORMAL, wx.NORMAL, 0))

        # preloader
        self.preloader = wx.animate.AnimationCtrl(self, ID_PRELOADER, pos=(260, 97), size=(24, 24))
        self.preloader.LoadFile('./gui/icons/preloader.gif', wx.animate.ANIMATION_TYPE_GIF)
        self.preloader.Hide()

        # events
        self.Bind(wx.EVT_BUTTON, self.OnRegisterNewUser, id=ID_BUTTON_ACCEPT)
        self.Bind(hl.EVT_HYPERLINK_LEFT, self.OnRegisterNewUser, id=ID_NEW_MEMBER_TXT)
        self.Bind(wx.EVT_BUTTON, self.OnExit, id=ID_BUTTON_CANCEL)

        # form settings
        size = (310, 150)
        self.SetSize(size)
        self.icon = wx.Icon('./gui/icons/app.ico', wx.BITMAP_TYPE_ICO)
        self.SetIcon(self.icon)
        self.Show()

    def PreloaderPlay(self):
        self.preloader.Show()
        self.preloader.Play()

    def PreloaderStop(self):
        self.preloader.Hide()
        self.preloader.Stop()

    def OnExit(self, event):
        self.Close()

    def OnRegisterNewUser(self, event):
        self.Hide()

    def OnExitRegister(self, event):
        self.Close()

    def OnExitFilemanager(self, event):
        self.Close()


if __name__ =='__main__':
    app = wx.App(0)
    frame = CloudStorage(None, -1, 'Авторизация')
    frame.Show()
    app.MainLoop()

并希望在按下“接受”按钮(俄语为“Войти”)后验证输入的数据，但没有任何反应。然而，验证器将在 TextCtrl 的构造函数中使用。怎么了？

Answer 1

我对 wxPyvalidators 进行了一些挖掘，并发现了一个较早的关于此的问题:wx.TextCtrl and wx.Validator .

在您的类 CloudStorage(wx.Frame) 中添加以下行:

def OnRegisterNewUser(self, event):
    if self.login_input.GetValidator().Validate(self.login_input) and self.pass_input.GetValidator().Validate(self.pass_input):
        self.Hide()

显然，如果您使用 wx.Dialog，验证器会被自动调用。但是，如果您使用 wx.Panel 或 wx.Frame，则必须从事件处理程序中调用验证器方法。您可能还想阅读this 。但我的理解可能是错误的。不过，代码似乎可以工作。