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I have a wxApplication with several wxTextCtrl, for example:

self.tc1 = wx.TextCtrl(self.panel,-1,pos=(100,150),size=(60,20))
self.tc2 = wx.TextCtrl(self.panel,-1,pos=(100,170),size=(60,20))
self.tc3 = wx.TextCtrl(self.panel,-1,pos=(100,190),size=(60,20))
self.tc_all = [self.tc1, self.tc2, self.tc3]

After the User entered different values and clicked on a button, I want to sort the entered values, for example the user entered this:

>>> values = [self.tc1.GetValue(), self.tc2.GetValue(), self.tc3.GetValue()]
>>> print values
[2,1,3]

I want to sort these values and change it inside the TextCtrls, so I do:

values.sort()
for i in range(len(values)):
    self.tc_all[i].SetValue(values[i])

First the values change correctly, but when I hover with the mouse on each TextCtrl, then they change back into the old value. I tried to add a self.panel.Layout(), but the problem still occurs.

Edit: I changed my sizer setup, now my values not even change - but I don't know what's wrong:

self.inputsizer = wx.BoxSizer(wx.VERTICAL)
for i in range(self.ticks):
    self.inputsizer.Add(self.tc_all[i], 0, wx.ALL|wx.EXPAND, 2)
self.inputpanel.SetSizer(self.inputsizer)

and on my event (when inputs shall be sorted):

self.inputsizer.Layout()

Edit2: It's getting far from original question, don't know if I should have started a new question?! Explanation: Somewhere in class interpolation I save an image ('tmp.png') which I want to display on Panel pageThree. When I don't draw any image, everything works fine. But drawing an image is important part of my program, so here two problems occur: 1) My values inside the TextCtrls "hide": Just after mousehover they appear as expected (sorted). 2) The wrong image is drawn: I get a screenshot of my panel as image at the first click on my button; when I press the button twice, the correct image is drawn.

import wx

class MainFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, wx.ID_ANY, 
                          "Pyramid App",size=(800,600),pos=((wx.DisplaySize()[0]-800)/2,(wx.DisplaySize()[1]-600)/2),style= wx.SYSTEM_MENU | wx.CAPTION | wx.MINIMIZE_BOX | wx.CLOSE_BOX)

        self.p = wx.Panel(self,size=(800,600),pos=(0,0))
        self.p.Hide()
        self.PageThree = pageThree(self)
        self.sizer = wx.BoxSizer(wx.VERTICAL)
        self.sizer.Add(self.PageThree, 1, wx.EXPAND)
        self.SetSizer(self.sizer)
        self.Layout()

class pageThree(wx.Panel):
    def __init__(self, parent):
        wx.Panel.__init__(self, parent=parent,size=(800,525))
        self.myparent=parent
        self.pageThree=wx.Panel(self,size=(800,525))
        self.widgets()

    def widgets(self):
        self.ticks = 10
        self.tc_all = [None for i in range(self.ticks)]
        self.inputsizer = wx.BoxSizer(wx.VERTICAL)
        for i in range(self.ticks):
            self.tc_all[i] = wx.TextCtrl(self.pageThree, pos=(20+10+160*(i/10),265+10+25*(i%10)),size=(80,20))
            self.inputsizer.Add(self.tc_all[i], 0, wx.ALL|wx.EXPAND, 2)
        self.pageThree.SetSizer(self.inputsizer)

        self.startBtn = wx.Button(self.pageThree,label="button",pos=(350,102),size=(100,30))
        self.Bind(wx.EVT_BUTTON, self.start, self.startBtn)

    def start(self, event):
        h = []
        for i in range(self.ticks):
            val = self.tc_all[i].GetValue()
            if not (val==''):
                h.append(float(val))
        h.sort()
        h.reverse()
        hh = h + ['']*(self.ticks-len(h))
        for i in range(self.ticks):
            self.tc_all[i].SetValue(str(hh[i]))

        self.interp = interpolation(self.myparent)
        self.interp.run(h)

    def UpdatePicture(self):
        bitmap = wx.Bitmap('tmp.png', type=wx.BITMAP_TYPE_PNG)
        bitmap = self.scale_bitmap(bitmap, 400, 390)
        control = wx.StaticBitmap(self.pageThree, -1, bitmap)
        control.SetPosition((350,135))

    def scale_bitmap(self, bitmap, width, height):
        image = wx.ImageFromBitmap(bitmap)
        image = image.Scale(width, height, wx.IMAGE_QUALITY_HIGH)
        result = wx.BitmapFromImage(image)
        return result

class interpolation():
    def __init__(self, parent):
        self.myparent=parent
        self.page3 = pageThree(self.myparent)

    def run(self, h):
        self.page3.UpdatePicture()

if __name__ == "__main__":
    app = wx.App()
    MainFrame().Show()
    app.MainLoop()
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1 回答 1

1

好的，问题在于您如何访问信息，尝试通过 sizer 获取它：

self.tc_all = []
for child in self.inputsizer.GetChildren():
    self.tc_all.append(child.GetWindow().GetValue())

self.tc_all = sorted(self.tc_all)

for child,item in zip(self.inputsizer.GetChildren(),self.tc_all):
    child.GetWindow().SetValue(item)

self.inputsizer.Layout()

这就是这里发生的事情。每个sizer 都有称为“sizer items”的子项（此处的文档），它们是您在GUI 上的项目的表示形式。调用GetChildren()任何sizer 将返回该sizer 的所有sizer 项目的列表。请注意，这些是注意项目本身，因此您需要再迈出一步，这就是GetWindow()功能。在 sizer 项目上的结果GetWindow()是返回 sizer 项目所代表的实际项目（或小部件），在项目的情况下TextCtrl。一旦你有了它，你就可以像往常一样对待它。

GetChildren()在包含多个项目的 sizer 上使用该函数时要小心，因为它会返回所有子项。因此，如果您尝试调用SetValue()不支持该方法的东西，您的代码将会中断，例如StaticText

希望这可以帮助

编辑：实际的答案是嵌套面板产生的尺寸问题。在嵌套面板中编辑 sizer 会导致问题中提到的奇怪行为。

于 2013-11-25T16:55:26.247 回答