import wx
import wx.adv
import wx.lib.embeddedimage


APPLICATION_MINIMUM_SIZE = (300, 250)
TEXT_FIELD_SIZE = (250, 20)
IMAGE_DATA = wx.lib.embeddedimage.PyEmbeddedImage(
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class TaskBarIcon(wx.adv.TaskBarIcon):

    def __init__(self, parent):
        super().__init__()

        self.parent = parent

        self.taskBarIcon = IMAGE_DATA.GetIcon()
        self.SetIcon(self.taskBarIcon)

        self.Bind(event=wx.EVT_MENU,
                  handler=self.OnExit,
                  id=wx.ID_EXIT)

    def CreatePopupMenu(self):
        self.popupMenu = wx.Menu()
        self.popupMenu.Append(item="&Exit\tCtrl+E",
                              id=wx.ID_EXIT)
        return self.popupMenu

    def OnExit(self, event):
        # SJB Don't do anything if we are already exiting!
        if not self.parent.exitDialogShowing:
            self.parent.Close()


class Window(wx.Frame):

    def __init__(self):
        super().__init__(parent=None,
                         title="Playground")

        self.Bind(event=wx.EVT_CLOSE,
                  handler=self.OnMainWindowClose)

        self.fileMenu = wx.Menu()

        self.fileMenu.Append(item="&Exit\tCtrl+E",
                             helpString="Ask whether to exit the application.",
                             id=wx.ID_EXIT)
        self.Bind(event=wx.EVT_MENU,
                  handler=self.OnFileExit,
                  id=wx.ID_EXIT)

        self.menuBar = wx.MenuBar()
        self.menuBar.Append(title="&File",
                            menu=self.fileMenu)
        self.SetMenuBar(self.menuBar)

        self.panel = wx.Panel(parent=self)
        self.panel.SetBackgroundColour("yellow")

        self.CreateStatusBar()

        self.labelOfTextFieldForURL = wx.StaticText(parent=self.panel,
                                                    label="URL:")
        self.textFieldForURL = wx.TextCtrl(parent=self.panel,
                                           size=TEXT_FIELD_SIZE)

        self.labelOfTextFieldForSearchTerm = wx.StaticText(parent=self.panel,
                                                           label="Search term:")
        self.textFieldForSearchTerm = wx.TextCtrl(parent=self.panel,
                                                  size=TEXT_FIELD_SIZE)

        self.buttonCount = wx.Button(parent=self.panel,
                                     label="Count")
        self.buttonCount.Bind(event=wx.EVT_BUTTON,
                              handler=self.OnButtonCount)

        self.sizer1 = wx.BoxSizer(orient=wx.HORIZONTAL)
        self.sizer2 = wx.BoxSizer(orient=wx.HORIZONTAL)
        self.sizer3 = wx.BoxSizer(orient=wx.VERTICAL)

        self.sizer1.Add(window=self.labelOfTextFieldForURL,
                        border=5,
                        flag=wx.ALL | wx.ALIGN_CENTER)
        self.sizer1.Add(window=self.textFieldForURL,
                        border=5,
                        flag=wx.ALL | wx.ALIGN_CENTER)
        self.sizer2.Add(window=self.labelOfTextFieldForSearchTerm,
                        border=5,
                        flag=wx.ALL | wx.ALIGN_CENTER)
        self.sizer2.Add(window=self.textFieldForSearchTerm,
                        border=5,
                        flag=wx.ALL | wx.ALIGN_CENTER)
        self.sizer3.AddStretchSpacer()
        self.sizer3.Add(sizer=self.sizer1,
                        border=5,
                        flag=wx.ALL | wx.ALIGN_CENTER)
        self.sizer3.Add(sizer=self.sizer2,
                        border=5,
                        flag=wx.ALL | wx.ALIGN_CENTER)
        self.sizer3.Add(window=self.buttonCount,
                        border=5,
                        flag=wx.ALL | wx.ALIGN_CENTER)
        self.sizer3.AddStretchSpacer()

        self.panel.SetSizer(self.sizer3)
        self.panel.Layout()
        self.exitDialogShowing = False  # SJB Flag for exit dialog
        self.taskBarIcon = TaskBarIcon(parent=self)

        self.SetMinSize(APPLICATION_MINIMUM_SIZE)
        self.Center()

    def OnMainWindowClose(self, event):
        self.exitDialogShowing = True  # SJB Flag that the dialog is showing
        dialog = wx.MessageDialog(parent=self,
                                  caption="Exit Playground",
                                  message="Are you sure to exit Playground?",
                                  style=wx.YES_NO | wx.ICON_QUESTION)

        if dialog.ShowModal() == wx.ID_YES:
            self.taskBarIcon.Destroy()
            self.Destroy()
        else:
            dialog.Destroy()
            self.exitDialogShowing = False  # SJB Clear Flag

    def OnFileExit(self, event):
        self.Close()

    def OnButtonCount(self, event):
        pass


if __name__ == "__main__":
    application = wx.App()

    applicationWindow = Window()
    applicationWindow.Show()

    application.MainLoop()