EVT_CHAR handler not called for TE_MULTILINE TextCtrl on macOS

[ExplodingCabbage]

Operating system: macOS
wxPython version: 4.0.1
Stock or custom build: Stock
Python version: 3.6.1
Stock or custom build: Stock

Description of the problem: EVT_CHAR handlers on a TextCtrl are not called if the TextCtrl has the TE_MULTILINE Window Style flag set.

This has previously been noted by Hesky Fisher at https://stackoverflow.com/q/31620085/1709587, and I experienced the same thing today.

Demo: try running the program below on a Mac, and observe that "Change handler 1 called" is printed if you type in the first TextCtrl, but nothing is printed if you type in the second TextCtrl.

import wx

app = wx.App()
frame = wx.Frame(None, title="Test App", size=(640, 480))

panel = wx.Panel(frame)

text_ctrl_1 = wx.TextCtrl(panel, pos=(0, 0), size=(200, 25))
text_ctrl_2 = wx.TextCtrl(panel, pos=(0, 100), size=(200, 100),
                          style=wx.TE_MULTILINE)

def change_handler_1(event):
    print("Change handler 1 called")
    event.Skip()

def change_handler_2(event):
    print("Change handler 2 called")
    event.Skip()

text_ctrl_1.Bind(wx.EVT_CHAR, change_handler_1)
text_ctrl_2.Bind(wx.EVT_CHAR, change_handler_2)

frame.Show()
app.MainLoop()

[RobinD42]

This is an issue in wxWidgets 3.0, which appears to have already been fixed in 3.1. wxPython will get the fix in version 4.1, which is being worked on now.

It would be nice to get the fix in wxWidgets 3.0 too, and filing an issue in their Trac may get some traction. But if the fix required a change that was not ABI compatible then it may not be possible.