Question

我一直致力于开发基于wxPython的向导，我希望能够根据向导本身提供的输入动态增加大小。该向导通过一系列页面进行，然后提示用户输入一个数字。目标是让向导然后通过txtCtrl框中输入的数字增加。我无法访问向导类中的pageList列表，该列表负责管理向导的顶级方面。使用以下代码：

import wx
import wx.wizard as wiz

########################################################################


#----------------------------------------------------------------------
# Wizard Object which contains the list of wizard pages.
class DynaWiz(object):
    def __init__(self):
        wizard = wx.wizard.Wizard(None, -1, "Simple Wizard")
        self.pageList = [TitledPage(wizard, "Page 1"),
                    TitledPage(wizard, "Page 2"),
                    TitledPage(wizard, "Page 3"),
                    TitledPage(wizard, "Page 4"),
                    AddPage(wizard)]
        for i in range(len(self.pageList)-1):
            wx.wizard.WizardPageSimple.Chain(self.pageList[i],self.pageList[i+1])

        wizard.FitToPage(self.pageList[0])

        wizard.RunWizard(self.pageList[0])

        wizard.Destroy()

#----------------------------------------------------------------------
#generic wizard pages
class TitledPage(wiz.WizardPageSimple):
    def __init__(self, parent, title):
        """Constructor"""
        wiz.WizardPageSimple.__init__(self, parent)

        sizer = wx.BoxSizer(wx.VERTICAL)
        self.SetSizer(sizer)

        title = wx.StaticText(self, -1, title)
        title.SetFont(wx.Font(18, wx.SWISS, wx.NORMAL, wx.BOLD))
        sizer.Add(title, 0, wx.ALIGN_CENTRE|wx.ALL, 5)
        sizer.Add(wx.StaticLine(self, -1), 0, wx.EXPAND|wx.ALL, 5)

#----------------------------------------------------------------------
# page used to identify number of pages to add
class AddPage(wiz.WizardPageSimple):
    def __init__(self,parent):
        self.parent = parent
        """Constructor"""
        wiz.WizardPageSimple.__init__(self, parent)


        sizer = wx.BoxSizer(wx.VERTICAL)
        self.SetSizer(sizer)
        self.numPageAdd = wx.TextCtrl(self, -1, "")
        self.verifyButton = wx.Button(self, id=wx.ID_ANY, label = "Confirm",name = "confirm")
        self.verifyButton.Bind(wx.EVT_BUTTON, self.append_pages)

        sizer.Add(self.numPageAdd, 0, wx.ALIGN_CENTRE|wx.ALL, 5)
        sizer.Add(self.verifyButton,0,wx.ALIGN_CENTER|wx.ALL, 5)
        sizer.Add(wx.StaticLine(self, -1), 0, wx.EXPAND|wx.ALL, 5)

    #function used to add pages to pageList inside of Wizard Object containing
    # this page
    def append_pages(self,event):
        n = int(self.numPageAdd.GetValue())
        for i in range(n):
            #Add n number of pages to wizard list "pageList" here....
            self.parent.pageList.append(TitledPage(wizard, "Added Page"))

#----------------------------------------------------------------------

if __name__ == "__main__":
    app = wx.App(False)
    dWiz = DynaWiz()
    app.MainLoop()

使用此代码生成以下错误消息：

AttributeError：＆＃39;向导＆＃39;对象没有属性＆＃39; pageList＆＃39;

我明白为什么会这样，因为最终页面的父级是Wizard对象而不是DynaWiz对象。话虽如此，有没有办法访问DynaWiz对象中的pageList列表并确保当前向导从AddPage类中的事件中重新加载？

Answer 1

您可以将Dynawiz实例传递给AddPage的构造函数。然后AddPage可以修改pageList。见下文：

import wx
import wx.wizard as wiz

########################################################################


#----------------------------------------------------------------------
# Wizard Object which contains the list of wizard pages.
class DynaWiz(object):
    def __init__(self):
        wizard = wx.wizard.Wizard(None, -1, "Simple Wizard")
        self.pageList = [TitledPage(wizard, "Page 1"),
                    TitledPage(wizard, "Page 2"),
                    TitledPage(wizard, "Page 3"),
                    TitledPage(wizard, "Page 4"),
                    AddPage(wizard, self)]
        for i in range(len(self.pageList)-1):
            wx.wizard.WizardPageSimple.Chain(self.pageList[i],self.pageList[i+1])

        wizard.FitToPage(self.pageList[0])

        wizard.RunWizard(self.pageList[0])

        wizard.Destroy()

#----------------------------------------------------------------------
#generic wizard pages
class TitledPage(wiz.WizardPageSimple):
    def __init__(self, parent, title):
        """Constructor"""
        wiz.WizardPageSimple.__init__(self, parent)

        sizer = wx.BoxSizer(wx.VERTICAL)
        self.SetSizer(sizer)

        title = wx.StaticText(self, -1, title)
        title.SetFont(wx.Font(18, wx.SWISS, wx.NORMAL, wx.BOLD))
        sizer.Add(title, 0, wx.ALIGN_CENTRE|wx.ALL, 5)
        sizer.Add(wx.StaticLine(self, -1), 0, wx.EXPAND|wx.ALL, 5)

#----------------------------------------------------------------------
# page used to identify number of pages to add
class AddPage(wiz.WizardPageSimple):
    def __init__(self,parent,dynawiz):
        self.parent = parent
        self.dynawiz = dynawiz
        """Constructor"""
        wiz.WizardPageSimple.__init__(self, parent)


        sizer = wx.BoxSizer(wx.VERTICAL)
        self.SetSizer(sizer)
        self.numPageAdd = wx.TextCtrl(self, -1, "")
        self.verifyButton = wx.Button(self, id=wx.ID_ANY, label = "Confirm",name = "confirm")
        self.verifyButton.Bind(wx.EVT_BUTTON, self.append_pages)

        sizer.Add(self.numPageAdd, 0, wx.ALIGN_CENTRE|wx.ALL, 5)
        sizer.Add(self.verifyButton,0,wx.ALIGN_CENTER|wx.ALL, 5)
        sizer.Add(wx.StaticLine(self, -1), 0, wx.EXPAND|wx.ALL, 5)

    #function used to add pages to pageList inside of Wizard Object containing
    # this page
    def append_pages(self,event):
        n = int(self.numPageAdd.GetValue())
        for i in range(n):
            #Add n number of pages to wizard list "pageList" here....
            self.dynawiz.pageList.append(TitledPage(self.parent, "Added Page"))
            wx.wizard.WizardPageSimple.Chain(self.dynawiz.pageList[-2],self.dynawiz.pageList[-1])
        self.parent.FindWindowById(wx.ID_FORWARD).SetLabel("Next >")

#----------------------------------------------------------------------

if __name__ == "__main__":
    app = wx.App(False)
    dWiz = DynaWiz()
    app.MainLoop()

wxPython动态地将页面添加到向导

1 个答案: