我正在使用 wxpython 和 wx.lib.pubsub 编写应用程序。在 python 2.7.3 中
1-有一个带有菜单项的框架。单击此菜单时,pubsub 会发布一条消息。
2-此消息破坏(如果可能)并创建“第一级”对话。
3-“第一级”对话框有一个值列表和一个“添加值”按钮。(注意:可以修改此类变量列表,因此我正在尝试更新此列表)
4- 单击“添加值”按钮时,pubsub 会发布另一条消息。
5- 此消息创建一个“二级”对话框,因此可以为新变量编写一个新名称。
6-在这个“第二级”对话中有一个“继续”按钮,它有两个后果:
第一个:Self.Destroy();
第二个:进入第2步,即破坏“第一级”对话并重新创建它。
到那时,该程序似乎运行良好,但是,当我将变量“添加”到“第一级”对话框中时,我将其销毁,然后我无法返回步骤 1 中所述的主框架。
为什么会这样?
所有对话都通过 ShowModal() 显示。但是,如果我只使用 Show() 它似乎可以正常工作,但是由于程序有很多菜单和项目,所以 ShowModal() 是首选。知道为什么它适用于 Show() 但不适用于 ShowModal() 吗?
如果有更简单的方法来执行我想做的任务,将不胜感激。
import wx
from wx.lib.pubsub import Publisher as pub
class itemReceiver(object):
def __init__(self):
pub.subscribe(self.__OnShowDialog, 'show.dialog')
def __OnShowDialog(self, message):
self.dlgParent = message.data[0]
print str(self.dlgParent)
self.valuesToShow = message.data[1]
print self.valuesToShow
#try to destroy dialog before creating a new one
try:
self.manageParametersDialog.Destroy()
except:
pass
self.manageParametersDialog = manageParamsDialog(self.dlgParent, self.valuesToShow)
print "ready to show first level dialogue"
self.manageParametersDialog.ShowModal() #if .Show() instead, there is no problem
class secondaryReceiver(object):
def __init__(self):
pub.subscribe(self.__OnShowDialog, 'add.item')
def __OnShowDialog(self, message):
dlgParent = message.data[0]
dlgGrandParent = message.data[1]
self.variableList = message.data[2]
editParameterDialog = editParamDlg(dlgParent, dlgGrandParent, self.variableList)
editParameterDialog.ShowModal()
class manageParamsDialog (wx.Dialog):
def __init__(self, parent, valueList):
self.valueList = valueList
self.parent = parent
wx.Dialog.__init__(self, parent, -1, "first level dialogue", style = wx.DEFAULT_DIALOG_STYLE | wx.RESIZE_BORDER)
sizer=wx.BoxSizer(wx.VERTICAL)
self.optionList = wx.ListBox(self, -1, size=(200, 70), choices = valueList)
sizer.Add(self.optionList)
addButton = wx.Button(self, -1, 'Add New')
self.Bind(wx.EVT_BUTTON, self.OnButton, addButton)
sizer.Add(addButton)
cancelButton = wx.Button(self, -1, 'Cancel')
self.Bind(wx.EVT_BUTTON, self.OnCancel, cancelButton)
sizer.Add(cancelButton)
self.SetSizer(sizer)
self.Fit()
def OnButton (self, e):
pub.sendMessage('add.item', [self, self.parent, self.valueList])
def OnCancel(self,e):
self.Destroy()
class editParamDlg(wx.Dialog):
def __init__(self, parent, grandParent, variableList):
self.variableList = variableList
self.grandParent = grandParent
wx.Dialog.__init__(self, parent, -1, "second level dialogue", style = wx.DEFAULT_DIALOG_STYLE | wx.RESIZE_BORDER)
hboxSizer = wx.BoxSizer(wx.HORIZONTAL)
self.textInput = wx.TextCtrl(self, -1)
hboxSizer.Add(self.textInput)
addButton = wx.Button(self, -1, 'Continue')
self.Bind(wx.EVT_BUTTON, self.OnAdd, addButton)
hboxSizer.Add(addButton)
cancelButton = wx.Button(self, -1, 'Cancel')
self.Bind(wx.EVT_BUTTON, self.OnCancel, cancelButton)
hboxSizer.Add(cancelButton)
self.SetSizer(hboxSizer)
self.Fit()
def OnAdd(self, e):
self.variableList.append(self.textInput.GetValue())
self.Destroy()
pub.sendMessage('show.dialog',[self.grandParent, self.variableList])
def OnCancel(self,e):
self.Destroy()
class ToolbarFrame(wx.Frame):
#this ToolbarFrame is the main window, with a Toolbar and a white panel below.
def __init__(self, parent, id):
wx.Frame.__init__(self, parent, id, "this is a frame", size=(480, 320))
myPanel = wx.Panel(self)
myPanel.SetBackgroundColour("White")
menuBar = wx.MenuBar()
fileMenu = wx.Menu()
menuItem = wx.MenuItem(fileMenu, -1, "menu item", "opens dialog via pubsub")
self.Bind(wx.EVT_MENU, self.OnMenuItem, menuItem)
fileMenu.AppendItem(menuItem)
menuBar.Append(fileMenu, "File")
self.SetMenuBar(menuBar)
def OnMenuItem(self, e):
pub.sendMessage('show.dialog', [self, ["one", "two", "three"]])
app = wx.PySimpleApp()
frame = ToolbarFrame(parent=None, id=-1)
frame.Show()
newItemListener = itemReceiver()
editParameterListener = secondaryReceiver()
app.MainLoop()