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我无法让向导第二页中的仪表显示和更新。直到达到 100% 才会显示。在我看来，该EVT_WIZARD_PAGE_CHANGED事件在页面上的对象显示之前得到处理。

下面的代码是我正在尝试做的简化版本。当我运行它时，第二页只是挂起，直到 fill_gauge 方法完成并且仪表处于 100%，然后它终于出现在屏幕上。有没有人知道如何在我切换到第二页并让它动态更新时立即显示仪表。

import time
import wx.wizard

class Wizard(wx.wizard.Wizard):
    def __init__(self, parent, title):
        wx.wizard.Wizard.__init__(self, parent, wx.ID_ANY, title )
        self.pages = []
        self.Bind(wx.wizard.EVT_WIZARD_PAGE_CHANGED, self.on_page_changed)

    def add_page(self, page):
        """Add a WizardPage to the pages list"""
        self.pages.append(page)

    def chain_pages(self):
        i = 0
        while 1:
            if i == len(self.pages) - 1:
                break
            else:
                wx.wizard.WizardPageSimple_Chain(self.pages[i], self.pages[i + 1])
                i += 1

    def run(self):
        self.RunWizard(self.pages[0])

    def on_page_changed(self, evt):
        #if coming from self.pages[0]
        #and direction is forward
        if evt.GetDirection(): direction = 'forward'
        else:                  direction = 'backward'

        if evt.GetPage() is self.pages[1]\
        and direction == "forward":
            self.pages[1].fill_gauge()

class StartPage(wx.wizard.WizardPageSimple):

    def __init__(self, parent, title):
        wx.wizard.WizardPageSimple.__init__(self, parent)
        self.sizer = wx.BoxSizer(wx.VERTICAL)
        self.text = wx.StaticText(self, -1,
        "This is the First Page")
        #self.text.Wrap(parent.GetClientSizeTuple()[0])
        self.sizer.Add(self.text, 0, wx.ALIGN_CENTER|wx.ALL, 5)

class UpdatePage(wx.wizard.WizardPageSimple):
    def __init__(self, parent, title):
        wx.wizard.WizardPageSimple.__init__(self, parent)
        self.sizer = wx.BoxSizer(wx.VERTICAL)
        self.status = wx.StaticText(self, -1, "This is the Second Page")
        self.gauge = wx.Gauge(self, -1, name = "Guage")

        self.sizer.Add(self.status, 0, wx.ALIGN_CENTER|wx.ALL, 5)
        self.sizer.Add(self.gauge, 0, wx.EXPAND|wx.ALIGN_CENTER_HORIZONTAL|wx.ALL, 10)
        self.SetSizer(self.sizer)

    def update(self, percent, status):
        self.status.SetLabel(status)
        self.gauge.SetValue(percent)
        #self.Refresh()

    def fill_gauge(self):
        x = 0
        while x <=100:
            self.update(x, "Gauge is at %d" % x)
            x += 10
            time.sleep(1)

if __name__ == '__main__':
    app = wx.App()
    wizard = Wizard(None, "Updater")
    wizard.add_page(StartPage(wizard, "Updater"))
    wizard.add_page(UpdatePage(wizard, "Updater"))
    wizard.chain_pages()
    wizard.run()
    wizard.Destroy()
    app.MainLoop()
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1 回答 1

1

您更新仪表的方法是阻止 gui 的事件循环。您可以使用 wx.Timer 来调用更新，这样它就不会阻塞。请参阅以下修改后的代码示例。

import time 
import wx.wizard


class Wizard(wx.wizard.Wizard):
    def __init__(self, parent, title):
        wx.wizard.Wizard.__init__(self, parent, wx.ID_ANY, title)
        self.pages = []
        self.Bind(wx.wizard.EVT_WIZARD_PAGE_CHANGED, self.on_page_changed)

    def add_page(self, page):
        """Add a WizardPage to the pages list"""
        self.pages.append(page)

    def chain_pages(self):
        i = 0
        while 1:
            if i == len(self.pages) - 1:
                break
            else:
                wx.wizard.WizardPageSimple_Chain(self.pages[i],
                                                 self.pages[i + 1])
                i += 1

    def run(self):
        self.RunWizard(self.pages[0])

    def on_page_changed(self, evt):
        # if coming from self.pages[0]
        # and direction is forward
        if evt.GetDirection():
            direction = 'forward'
        else:
            direction = 'backward'

        if evt.GetPage() is self.pages[1]\
        and direction == "forward":
#             self.pages[1].fill_gauge()
            self.pages[1].timer.Start(1000)


class StartPage(wx.wizard.WizardPageSimple):

    def __init__(self, parent, title):
        wx.wizard.WizardPageSimple.__init__(self, parent)
        self.sizer = wx.BoxSizer(wx.VERTICAL)
        self.text = wx.StaticText(self, -1,
        "This is the First Page")
        # self.text.Wrap(parent.GetClientSizeTuple()[0])
        self.sizer.Add(self.text, 0, wx.ALIGN_CENTER | wx.ALL, 5)


class UpdatePage(wx.wizard.WizardPageSimple):
    def __init__(self, parent, title):
        wx.wizard.WizardPageSimple.__init__(self, parent)
        self.sizer = wx.BoxSizer(wx.VERTICAL)
        self.status = wx.StaticText(self, -1, "This is the Second Page")
        self.gauge = wx.Gauge(self, -1, name="Guage")

        self.sizer.Add(self.status, 0, wx.ALIGN_CENTER | wx.ALL, 5)
        self.sizer.Add(self.gauge, 0,
                       wx.EXPAND | wx.ALIGN_CENTER_HORIZONTAL | wx.ALL, 10)
        self.SetSizer(self.sizer)

        self.gauge_pos = 0  # Added
        self.timer = wx.Timer(self)  # Added
        self.Bind(wx.EVT_TIMER, self.on_gauge_timer)  # Added

    def update(self, percent, status):
        self.status.SetLabel(status)
        self.gauge.SetValue(percent)
        # self.Refresh()

#     def fill_gauge(self):
#         x = 0
#         while x <= 100:
#             self.update(x, "Gauge is at %d" % x)
#             x += 10
#             time.sleep(1)

    def on_gauge_timer(self, event):  # Added method
        if self.gauge_pos < 100:
            self.gauge_pos += 10
            self.update(self.gauge_pos, "Gauge is at %d" % self.gauge_pos)
        else:
            self.timer.Stop()
            self.gauge_pos = 0


if __name__ == '__main__':
    app = wx.App()
    wizard = Wizard(None, "Updater")
    wizard.add_page(StartPage(wizard, "Updater"))
    wizard.add_page(UpdatePage(wizard, "Updater"))
    wizard.chain_pages()
    wizard.run()
    wizard.Destroy()
    app.MainLoop()

注意：如果你返回一个页面，它需要添加更好的代码来停止计时器并重置仪表，但我只是让它基本工作。

于 2013-09-01T11:47:43.533 回答