无法将自定义 Sizer 作为 parent 添加到 wxPython 中的 children 小部件

Unable to add custom Sizer as parent to its children widgets in wxPython

我目前正尝试在 wxPython 中制作 GUI。布局是 GUI 右侧的一个面板,带有 3 个 StaticBoxSizers。其中一个比其他的复杂得多,可以通过单击按钮向其中添加更多元素,所以我决定分解 GUI 文件并为其创建一个自定义 class 来尝试制作代码更清晰一些。

class 的当前初始化器如下所示:

class MonitorBox(wx.StaticBoxSizer):
    def __init__(self, monitors, pins, devices, *args, **kw):
        super().__init__(*args, **kw)
        self.monitors = monitors
        self.pin_choices = pins
        self.dev_choices = devices
        self.InitUI()

    def InitUI(self):
        monList = wx.FlexGridSizer(cols=4, vgap=5, hgap=5)
        add_monitor = wx.Button(self, wx.ID_ANY, "Add Monitor")
        add_monitor.Bind(wx.EVT_BUTTON, self.on_add_button)

        # create list headings
        nametxt = wx.StaticText(self, wx.ID_ANY, "Name:")
        devtxt = wx.StaticText(self, wx.ID_ANY, "Device:")
        pintxt = wx.StaticText(self, wx.ID_ANY, "Pin:")
        blnktxt = wx.StaticText(self, wx.ID_ANY, "")

        # Add Headings to sizer
        monList.AddMany([nametxt, devtxt, pintxt, blnktxt])
        self.monitor_rows = {}  # dictionary to store references to all the widgets

        # Create a row for each item in the mons dictionary
        for monitor, dev in self.mons.items():
            del_mon_button = wx.Button(self, wx.ID_ANY, '-', name=monitor, style=wx.BU_EXACTFIT)
            del_mon_button.Bind(wx.EVT_BUTTON, self.on_del_monitor)
            mon_name = wx.TextCtrl(self, wx.ID_ANY, monitor,
                                   style=wx.TE_PROCESS_ENTER,
                                   name=monitor)
            dev_name = wx.ComboBox(self, wx.ID_ANY, choices=self.dev_choices,
                                   style=wx.CB_READONLY, value=dev[0],
                                   name=monitor)
            pin_name = wx.ComboBox(self, wx.ID_ANY, choices=self.pin_choices[dev[0]],
                                   style=wx.CB_READONLY, value=dev[1],
                                   name=monitor)

            dev_name.Bind(wx.EVT_COMBOBOX, self.on_dev_choice)
            pin_name.Bind(wx.EVT_COMBOBOX, self.on_pin_choice)
            self.monitor_rows[monitor] = [mon_name, dev_name, pin_name, del_mon_button]
            monList.AddMany(self.monitor_rows[monitor])
        # TODO: make sure all the combo boxes are the same size
        self.monList = monList
        self.Add(monList, 1, wx.ALL, 5)
        self.Add(add_monitor, 0, wx.ALL, 5)

然而,当我尝试 运行 GUI 时,出现错误:

add_monitor = wx.Button(self, wx.ID_ANY, "Add Monitor")
TypeError: Button(): arguments did not match any overloaded call:
  overload 1: too many arguments
  overload 2: argument 1 has unexpected type 'MonitorBox'

我相信这是因为我正在尝试使用我的自定义 class 作为其中所有小部件的 parent,但我很困惑为什么会这样?

我对创建 GUI 非常陌生(这是我的第一个项目),但我目前正在研究并修复对 parents 等的所有引用。所以我很难知道正确的搜索词,看看其他人是否遇到过这个问题。

我的原始代码只是从 GUI 的主要 wx.Frame 调用的 InitUI(self) 函数,并将 monBox 创建为 StaticBoxSizer,它直接添加了所有 children 小部件。正如一开始提到的,我想把它分开的原因是因为这个面板创建了许多事件处理程序和额外的对话框,我想将它们保存在一个单独的文件中以帮助保持代码的可读性。

原始代码(没有拆分成单独的class)生成如图所示的Monitors面板:

问题是您从 wx.StaticBoxSizer 派生 MonitorBox class,而 wx.Button 只能是 window 的 child(wx.Framewx.Panel 等)不是 sizer (wx.StaticBoxSizer)。

如果您想分离代码,那么您的 MonitorBox class 应该来自 wx.Panel。请参阅下面的代码(及其注释)以了解执行此操作的方法。

import wx

class MonitorBox(wx.Panel):
    """
    This is the class with all the widgets in your MonitorBox class.
    You need to arrange the widget in a sizer here. 
    """
    def __init__(self, parent):
        super().__init__(parent=parent)

        #### Parent panel
        # No need to define a parent panel because the class itself is already a
        # panel. So self refers to a panel.

        #### Widgets
        # Here self is a panel not a sizer like in your question. So no problem
        # adding the button.
        self.add_monitor = wx.Button(self, wx.ID_ANY, "Add Monitor")
        #### Sizers
        self.sizer = wx.BoxSizer()
        #### Add widgets to sizer
        self.sizer.Add(self.add_monitor, flag=wx.CENTER)
        #### Add sizer to panel
        self.SetSizer(self.sizer)
        self.Fit()

class Main(wx.Frame):
    def __init__(self):
        super().__init__(None, title='Panel 3 comes from a different class',
                         size=(500, 500))
        #### Parent panel
        self.panel = wx.Panel(self)

        #### Some widgets
        ## The Static Box widget
        self.monitorsBox = wx.StaticBox(self.panel, label="Monitors")

        self.panelB = wx.Panel(self.panel, size=(200, 100))
        self.panelB.SetBackgroundColour((0, 0, 255))
        self.panelR = wx.Panel(self.panel, size=(200, 100))
        self.panelR.SetBackgroundColour((255, 0, 0))
        ## Add panel 3 as a child of the wx.StaticBox!!!
        self.panel3 = MonitorBox(self.monitorsBox)

        #### Sizers
        ## Main sizer
        self.sizer = wx.FlexGridSizer(3, 1, 5, 5)
        ## Sizers for the static box
        # The static box sizer
        self.monitorsBoxSizer = wx.StaticBoxSizer(self.monitorsBox, wx.VERTICAL)
        # Sizer for the content of the static box
        self.monitorsBoxSizerContent = wx.BoxSizer()

        #### Add widgets to sizers
        ## Static box content
        self.monitorsBoxSizerContent.Add(self.panel3, flag=wx.EXPAND)
        self.monitorsBoxSizer.Add(self.monitorsBoxSizerContent)
        ## Add everything to the main sizer
        self.sizer.Add(self.panelB, flag=wx.EXPAND|wx.ALL, border=10)
        self.sizer.Add(self.panelR, flag=wx.EXPAND|wx.ALL, border=10)
        self.sizer.Add(self.monitorsBoxSizer, flag=wx.EXPAND|wx.ALL, border=10)

        #### Add sizer to self.panel
        self.panel.SetSizer(self.sizer)
        self.panel.Fit()

if __name__ == '__main__':
    app = wx.App()                            
    frame = Main()
    frame.Show()  
    app.MainLoop()

很可能在原始代码中,主要 class 是从 wx.Frame 派生的,对吧?如果没有,请忽略其余部分。这就是它起作用的原因。因为您将按钮设为框架的 child 而不是 sizer。