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How do I make my text editor's Find function use selections instead of SetStyles? It's interfering with the Lexer and the self.tc.SetLexer(stc.STC_LEX_NULL) in this question. I don't wanna use SetStyles because I feel like it will interfere with other SetStyles in the future, so I wanna use selections instead, how do I do this?

PS: I am using Windows

Link to whats happening: imgur.com/a/oeLImVQ

Code:

import wx
import wx.stc as stc
import keyword

class MyFrame(wx.Frame):
 def __init__(self, *args, **kwds):
 kwds["style"] = wx.DEFAULT_FRAME_STYLE
 wx.Frame.__init__(self, *args, **kwds)
 self.tc = stc.StyledTextCtrl(self, style=wx.TE_MULTILINE | wx.TE_WORDWRAP)
 self.bt_find = wx.Button(self, -1, "find")
 self.bt_css = wx.Button(self, -1, "CSS")

 self.Bind(wx.EVT_BUTTON, self.on_button, self.bt_find)
 self.Bind(wx.EVT_FIND, self.on_find)
 self.Bind(wx.EVT_BUTTON, self.CSS, self.bt_css)

 self.pos = 0
 self.size = 0
 #
 sizer = wx.BoxSizer(wx.VERTICAL)
 sizer.Add(self.tc, 1, wx.EXPAND, 0)
 sizer.Add(self.bt_find, 0, wx.ALIGN_CENTER_HORIZONTAL, 0)
 sizer.Add(self.bt_css, 0, wx.ALIGN_CENTER_HORIZONTAL, 0)
 self.SetSizer(sizer)
 sizer.Fit(self)
 self.Layout()

 def on_button(self, event):
 self.txt = self.tc.GetValue()
 self.data = wx.FindReplaceData() # initializes and holds search parameters
 dlg = wx.FindReplaceDialog(self.tc, self.data, 'Find')
 dlg.Show()

 def on_find(self, event):
 self.tc.StartStyling(pos=0, mask=0xFF)
 self.tc.SetStyling(length=len(self.txt), style=0)
 fstring = event.GetFindString()
 self.size = len(fstring)
 while True:
 self.pos = self.txt.find(fstring, self.pos)
 if self.pos < 0:
 break
 self.tc.StyleSetSpec(1, "fore:#FF0000,back:#000000")
 self.tc.StartStyling(pos=self.pos, mask=0xFF)
 self.tc.SetStyling(length=self.size, style=1)
 self.pos += 1
 self.pos = 0

 def CSS(self, e):
 self.tc.SetLexer(stc.STC_LEX_CSS)
 self.tc.SetKeyWords(0, " ".join(keyword.kwlist))
 self.tc.StyleSetSpec(wx.stc.STC_CSS_ATTRIBUTE, 'fore:#0000FF')
 self.tc.StyleSetSpec(wx.stc.STC_CSS_CLASS, 'fore:#0000FF')
 self.tc.StyleSetSpec(wx.stc.STC_CSS_COMMENT, 'fore:#008000')
 self.tc.StyleSetSpec(wx.stc.STC_CSS_DEFAULT, 'fore:#000000')
 self.tc.StyleSetSpec(wx.stc.STC_CSS_DIRECTIVE, 'fore:#0000FF')
 self.tc.StyleSetSpec(wx.stc.STC_CSS_DOUBLESTRING, 'fore:#800080')
 self.tc.StyleSetSpec(wx.stc.STC_CSS_ID, 'fore:#008080')
 self.tc.StyleSetSpec(wx.stc.STC_CSS_IDENTIFIER, 'fore:#000000')
 self.tc.StyleSetSpec(wx.stc.STC_CSS_IDENTIFIER2, 'fore:#000000')
 self.tc.StyleSetSpec(wx.stc.STC_CSS_IMPORTANT, 'fore:#000000')
 self.tc.StyleSetSpec(wx.stc.STC_CSS_OPERATOR, 'fore:#800000')
 self.tc.StyleSetSpec(wx.stc.STC_CSS_PSEUDOCLASS, 'fore:#008080')
 self.tc.StyleSetSpec(wx.stc.STC_CSS_SINGLESTRING, 'fore:#800080')
 self.tc.StyleSetSpec(wx.stc.STC_CSS_TAG, 'fore:#008080')
 self.tc.StyleSetSpec(wx.stc.STC_CSS_UNKNOWN_IDENTIFIER, 'fore:#000000')
 self.tc.StyleSetSpec(wx.stc.STC_CSS_UNKNOWN_PSEUDOCLASS, 'fore:#008080')
 self.tc.StyleSetSpec(wx.stc.STC_CSS_VALUE, 'fore:#668B8B')

if __name__ == "__main__":

 app = wx.App()
 frame_1 = MyFrame(None, wx.ID_ANY, "")
 frame_1.Show()
 app.MainLoop()

Thanks in advance