在用 wxPython 做一个练习正则表达式的小工具，界面中有一个 source string 的多行文本框，当然，常用于粘贴网页源代码， 结果粘贴一段比较长的网页源代码时，粘贴进去的文本是截断的，看到默认的配置是有文本长度限制的 。

去除这个限制其实很简单，设置 MaxLength 为 0 即可 via

self.source = wx.TextCtrl(rootPane, style=wx.TE_MULTILINE)
self.source.SetMaxLength(0)

wxTextCtrl::SetMaxLength

virtual void SetMaxLength(unsigned long len)

This function sets the maximum number of characters the user can enter into the control. In other words, it allows to limit the text value length to len not counting the terminating NUL character.

If len is 0, the previously set max length limit, if any, is discarded and the user may enter as much text as the underlying native text control widget supports (typically at least 32Kb).

If the user tries to enter more characters into the text control when it already is filled up to the maximal length, a wxEVT_COMMAND_TEXT_MAXLEN event is sent to notify the program about it (giving it the possibility to show an explanatory message, for example) and the extra input is discarded.

Note that under GTK+, this function may only be used with single line text controls.

发现默认情况下，TextCtrl 是没有对一些快捷键的支持的，比如说全选(Ctrl+A)，Google 未果，只能求助于列表了， 很快就解决了。

self.source = wx.TextCtrl(rootPane, style=wx.TE_MULTILINE|wx.TE_RICH|wx.TE_PROCESS_ENTER)

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