如何使用文件对话框按钮更改现有 wxPython 对象的值

Question

我一直致力于为某些工作创建一个 python GUI。当谈到 Python 知识时，我会自我描述为新手。我也在使用 wxPython 和 wxGlade 来帮助进行 GUI 开发。

问题如下：

我有一个空的 TextCtrl 对象和它旁边的 Button。

按钮用于打开 FileDialog 并使用所选文件位置的值填充或替换 TextCtrl。我已经为按钮创建了打开 FileDialog 的功能，但我似乎无法弄清楚如何使用该结果值填充 TextCtrl。

import wx

class frmCheckSubmital(wx.Frame):
    def __init__(self, *args, **kwds):
        # begin wxGlade: frmCheckSubmitall.__init__
        kwds["style"] = kwds.get("style", 0) | wx.DEFAULT_FRAME_STYLE
        wx.Frame.__init__(self, *args, **kwds)
        self.rbxUtilitySelect = wx.RadioBox(self, wx.ID_ANY, "Utility", choices=["Stormwater", "Sewer", "Water"], majorDimension=1, style=wx.RA_SPECIFY_ROWS)
        self.txtFeaturesPath = wx.TextCtrl(self, wx.ID_ANY, "")
        self.btnSelectFeatures = wx.Button(self, wx.ID_ANY, "Select")
#        selectEvent = lambda event, pathname=txt: self.dialogFeatures(event, pathname)
        self.btnSelectFeatures.Bind(wx.EVT_BUTTON, self.dialogFeatures)
        self.txtPipesPath = wx.TextCtrl(self, wx.ID_ANY, "")
        self.btnSelectPipes = wx.Button(self, wx.ID_ANY, "Select")
        self.bxOutput = wx.Panel(self, wx.ID_ANY)
        self.cbxDraw = wx.CheckBox(self, wx.ID_ANY, "Draw")
        self.btnClear = wx.Button(self, wx.ID_ANY, "Clear")
        self.btnZoom = wx.Button(self, wx.ID_ANY, "Zoom")
        self.btnRun = wx.Button(self, wx.ID_ANY, "Run", style=wx.BU_EXACTFIT)

        self.__set_properties()
        self.__do_layout()
        # end wxGlade

    def __set_properties(self):
        # begin wxGlade: frmCheckSubmitall.__set_properties
        self.SetTitle("Check Submittal")
        self.rbxUtilitySelect.SetSelection(0)
        self.btnSelectFeatures.SetMinSize((80, 20))
        self.btnSelectPipes.SetMinSize((80, 20))
        self.cbxDraw.SetValue(1)
        self.btnClear.SetMinSize((50, 20))
        self.btnZoom.SetMinSize((50, 20))
        # end wxGlade

    def __do_layout(self):
        # begin wxGlade: frmCheckSubmitall.__do_layout
        sizer_1 = wx.BoxSizer(wx.VERTICAL)
        sizer_5 = wx.BoxSizer(wx.VERTICAL)
        sizer_8 = wx.BoxSizer(wx.HORIZONTAL)
        sizer_7 = wx.BoxSizer(wx.HORIZONTAL)
        sizer_6 = wx.BoxSizer(wx.HORIZONTAL)
        sizer_5.Add(self.rbxUtilitySelect, 0, wx.ALIGN_CENTER | wx.BOTTOM, 10)
        lblFeatures = wx.StaticText(self, wx.ID_ANY, "Features: ")
        sizer_6.Add(lblFeatures, 0, wx.ALIGN_CENTER | wx.LEFT, 16)
        sizer_6.Add(self.txtFeaturesPath, 1, 0, 0)
        sizer_6.Add(self.btnSelectFeatures, 0, wx.ALIGN_CENTER_VERTICAL | wx.LEFT | wx.RIGHT, 5)
        sizer_5.Add(sizer_6, 0, wx.EXPAND, 0)
        lblPipes = wx.StaticText(self, wx.ID_ANY, "Pipes: ")
        sizer_7.Add(lblPipes, 0, wx.ALIGN_CENTER | wx.LEFT | wx.RIGHT, 16)
        sizer_7.Add(self.txtPipesPath, 1, 0, 0)
        sizer_7.Add(self.btnSelectPipes, 0, wx.ALIGN_CENTER_VERTICAL | wx.LEFT | wx.RIGHT, 5)
        sizer_5.Add(sizer_7, 0, wx.ALL | wx.EXPAND, 0)
        sizer_5.Add(self.bxOutput, 1, wx.ALL | wx.EXPAND, 10)
        sizer_8.Add(self.cbxDraw, 0, wx.LEFT | wx.RIGHT, 10)
        sizer_8.Add(self.btnClear, 0, wx.RIGHT, 10)
        sizer_8.Add(self.btnZoom, 0, 0, 0)
        sizer_8.Add((20, 20), 1, 0, 0)
        sizer_8.Add(self.btnRun, 0, wx.BOTTOM | wx.RIGHT, 10)
        sizer_5.Add(sizer_8, 0, wx.EXPAND, 0)
        sizer_1.Add(sizer_5, 1, wx.EXPAND, 0)
        self.SetSizer(sizer_1)
        self.Layout()
        self.SetSize((400, 300))
        # end wxGlade
# Begin Dialog Method
    def dialogFeatures(self, event):


    # otherwise ask the user what new file to open
        #with wx.FileDialog(self, "Select the Features File", wildcard="Text files (*.txt)|*.txt",
         #              style=wx.FD_OPEN | wx.FD_FILE_MUST_EXIST) as fileDialog:
        fileDialog = wx.FileDialog(self, "Select the Features File", wildcard="Text files (*.txt)|*.txt",
                                   style=wx.FD_OPEN | wx.FD_FILE_MUST_EXIST)
        if fileDialog.ShowModal() == wx.ID_CANCEL:
            return     # the user changed their mind

        # Proceed loading the file chosen by the user
        pathname = fileDialog.GetPath()
        self.txtFeaturesPath.SetValue = pathname
        self.txtFeaturesPath.SetValue(pathname)
        try:
            with open(pathname, 'r') as file:
                self.txtFeaturesPath = file
        except IOError:
            wx.LogError("Cannot open file '%s'." % newfile)
# End Dialog Method
# end of class frmCheckSubmitall


if __name__ == '__main__':
    app=wx.PySimpleApp()
    frame = frmCheckSubmital(parent=None, id=-1)
    frame.Show()
    app.MainLoop()

我尝试了几件事，但我筋疲力尽，需要一些帮助。

我尝试做的一些事情： - 在对话框方法中添加第三个参数以返回它（只是不确定在哪里分配） - 使用 lambda 事件尝试用构造函数赋值？

任何帮助或见解将不胜感激。谢谢！

Answer 1

正如其他人已经指出的那样，要走的路是使用文本控件的SetValue。但这里有一个可运行的小例子：

import wx

class MyPanel(wx.Panel):

    def __init__(self, parent):
        wx.Panel.__init__(self, parent)

        open_file_dlg_btn = wx.Button(self, label="Open FileDialog")
        open_file_dlg_btn.Bind(wx.EVT_BUTTON, self.on_open_file)

        self.file_path = wx.TextCtrl(self)

        sizer = wx.BoxSizer(wx.VERTICAL)
        sizer.Add(open_file_dlg_btn, 0, wx.ALL, 5)
        sizer.Add(self.file_path, 1, wx.ALL|wx.EXPAND, 5)
        self.SetSizer(sizer)

    def on_open_file(self, event):
        wildcard = "Python source (*.py)|*.py|" \
            "All files (*.*)|*.*"        
        dlg = wx.FileDialog(
            self, message="Choose a file",
                    defaultDir='', 
                    defaultFile="",
                    wildcard=wildcard,
                    style=wx.FD_OPEN | wx.FD_MULTIPLE | wx.FD_CHANGE_DIR
        )
        if dlg.ShowModal() == wx.ID_OK:
            paths = dlg.GetPath()
            print("You chose the following file(s):")
            for path in paths:
                print(path)
            self.file_path.SetValue(str(paths))
        dlg.Destroy()


class MyFrame(wx.Frame):

    def __init__(self):
        wx.Frame.__init__(self, None,
                          title="File Dialogs Tutorial")
        panel = MyPanel(self)
        self.Show()

if __name__ == '__main__':
    app = wx.App(False)
    frame = MyFrame()
    app.MainLoop()

Answer 2

我意识到我分配的不是 fileDialog 打开的值，而是 fileDialog 对象在 ram 中的位置。

解决方法如下

value = fileDialog.Directory + "\\" + fileDialog.filename            
self.txtFeaturesPath.SetValue(value)

谢谢！

Answer 3

试试：

self.txtFeaturesPath.SetValue(pathname)

您的示例代码中还有一些其他错误的“功能”，因此请小心。