[Python 3.6][wx 4.0.0][RichtextCtrl] Export and import text in xml format

wxPython Users
1

Hello,

I’m
migrating an application that was originally developed in Python 2 and wxPython 3.0.2 to Python 3 and wxPython 4.0.0. The last thing I get stuck with is the use of the XML format in RichTextCtrl to keep the layout

For backup, in python 2, I wrote this (where rtc is a RichTextCtrl and txt a string then saved in a database) :

import cStringIO as io
handler = wx.richtext.RichTextXMLHandler()
stream = io.StringIO()
handler.SaveStream(rtc.GetBuffer(), stream)
stream.seek(0)
txt = stream.read()

For reading :

stream = io.StringIO()
handler = wx.richtext.RichTextXMLHandler()
buffer = rtc.GetBuffer()
buffer.AddHandler(handler)
stream.write(txt)
stream.seek(0)
handler.LoadStream(buffer, stream)

With wxPython 4.0.0, this way does not work as RichTextXMLHandler has no longer methods "LoadStream" and "SaveStream". There are now methods "ImportXML" and "ExportXML" but I have not found any examples to understand how to use them.

Thank you in advance for your answer
2

Try LoadFile(buffer, stream) instead of LoadStream().

Scott

···

On Thu, 27 Apr 2017, Guillaume DURIAUD wrote:

I'm migrating an application that was originally developed in Python 2 and
wxPython 3.0.2 to Python 3 and wxPython 4.0.0. The last thing I get stuck
with is the use of the XML format in RichTextCtrl to keep the layout

For backup, in python 2, I wrote this (where rtc is a RichTextCtrl and txt
a string then saved in a database) :

import cStringIO as io handler = wx.richtext.RichTextXMLHandler() stream = io.StringIO() handler.SaveStream(rtc.GetBuffer(), stream) stream.seek(0) txt = stream.read()
For reading :
stream = io.StringIO() handler = wx.richtext.RichTextXMLHandler() buffer = rtc.GetBuffer() buffer.AddHandler(handler) stream.write(txt) stream.seek(0) handler.LoadStream(buffer, stream)
With wxPython 4.0.0, this way does not work as RichTextXMLHandler has no lo
nger methods "LoadStream" and "SaveStream". There are now methods "ImportXM
L" and "ExportXML" but I have not found any examples to understand how to u
se them.
Thank you in advance for your answer

3

I use it like that:

import io

import wx.richtext as rt

if rt.RichTextBuffer.FindHandlerByType(rt.RICHTEXT_TYPE_XML) is None:

rt.RichTextBuffer.AddHandler(rt.RichTextXMLHandler())

…

rtc = rt.RichTextCtrl(…)

…

def GetXML():

buffer = rtc.GetBuffer()

xmlhandler = buffer.FindHandlerByType(rt.RICHTEXT_TYPE_XML)

with io.BytesIO() as stream:

xmlhandler.SaveFile(buffer, stream)

xml = stream.getvalue()

return xml

def PutXML(xml):

buffer = rtc.GetBuffer()

xmlhandler = buffer.FindHandlerByType(rt.RICHTEXT_TYPE_XML)

with io.BytesIO(xml) as stream:

xmlhandler.LoadFile(buffer, stream)

``

I think the io.BytesIO() is better on Python 3.

woss

  1. április 27., csütörtök 17:04:52 UTC+2 időpontban Guillaume DURIAUD a következőt írta:
···

Hello,

I’m
migrating an application that was originally developed in Python 2 and wxPython 3.0.2 to Python 3 and wxPython 4.0.0. The last thing I get stuck with is the use of the XML format in RichTextCtrl to keep the layout

For backup, in python 2, I wrote this (where rtc is a RichTextCtrl and txt a string then saved in a database) :

import cStringIO as io
handler = wx.richtext.RichTextXMLHandler()
stream = io.StringIO()
handler.SaveStream(rtc.GetBuffer(), stream)
stream.seek(0)
txt = stream.read()

For reading :

stream = io.StringIO()
handler = wx.richtext.RichTextXMLHandler()
buffer = rtc.GetBuffer()
buffer.AddHandler(handler)
stream.write(txt)
stream.seek(0)
handler.LoadStream(buffer, stream)

With wxPython 4.0.0, this way does not work as RichTextXMLHandler has no longer methods “LoadStream” and “SaveStream”. There are now methods “ImportXML” and “ExportXML” but I have not found any examples to understand how to use them.

Thank you in advance for your answer

4

Thanks tou both, It works !

My datas are saved in database as a string. I do that :

stream = io.BytesIO()

stream.write(bytes(txt, encoding = “utf8”))
stream.seek(0)

handler = wx.richtext.RichTextXMLHandler()
buffer = rtc.GetBuffer()
buffer.AddHandler(handler)

handler.LoadFile(buffer, stream)