hwf1324
commented
2 weeks ago wxPython demo：
#!/usr/bin/env python
import os
import wx
import wx.html2 as webview
# WebView Backends
backends = [
(webview.WebViewBackendEdge, 'WebViewBackendEdge'),
(webview.WebViewBackendIE, 'WebViewBackendIE'),
(webview.WebViewBackendWebKit, 'WebViewBackendWebKit'),
(webview.WebViewBackendDefault, 'WebViewBackendDefault'),
]
#----------------------------------------------------------------------
class TestPanel(wx.Panel):
def __init__(self, parent, log, frame=None):
self.log = log
wx.Panel.__init__(self, parent, -1)
self.current = "http://wxPython.org"
self.frame = frame
if frame:
self.titleBase = frame.GetTitle()
sizer = wx.BoxSizer(wx.VERTICAL)
btnSizer = wx.BoxSizer(wx.HORIZONTAL)
# The Internet Explorer emulation level is a persistent per-user and
# per-application value.
webview.WebView.MSWSetEmulationLevel(webview.WEBVIEWIE_EMU_IE11)
# If you would like to reset it back to the default (no-emulation) then
# it can be done by calling this:
# webview.WebView.MSWSetEmulationLevel(webview.WEBVIEWIE_EMU_DEFAULT)
# Find an available backend
backend = None
for id, name in backends:
available = webview.WebView.IsBackendAvailable(id)
log.write("Backend 'wx.html2.{}' availability: {}\n".format(name, available))
if available and backend is None:
backend = id
log.write("Using backend: '{}'\n".format(str(backend, 'ascii')))
# Create the WebView
self.wv = webview.WebView.New(self, backend=backend)
self.Bind(webview.EVT_WEBVIEW_NAVIGATING, self.OnWebViewNavigating, self.wv)
self.Bind(webview.EVT_WEBVIEW_LOADED, self.OnWebViewLoaded, self.wv)
btn = wx.Button(self, -1, "Open", style=wx.BU_EXACTFIT)
self.Bind(wx.EVT_BUTTON, self.OnOpenButton, btn)
btnSizer.Add(btn, 0, wx.EXPAND|wx.ALL, 2)
btn = wx.Button(self, -1, "<--", style=wx.BU_EXACTFIT)
self.Bind(wx.EVT_BUTTON, self.OnPrevPageButton, btn)
btnSizer.Add(btn, 0, wx.EXPAND|wx.ALL, 2)
self.Bind(wx.EVT_UPDATE_UI, self.OnCheckCanGoBack, btn)
btn = wx.Button(self, -1, "-->", style=wx.BU_EXACTFIT)
self.Bind(wx.EVT_BUTTON, self.OnNextPageButton, btn)
btnSizer.Add(btn, 0, wx.EXPAND|wx.ALL, 2)
self.Bind(wx.EVT_UPDATE_UI, self.OnCheckCanGoForward, btn)
btn = wx.Button(self, -1, "Stop", style=wx.BU_EXACTFIT)
self.Bind(wx.EVT_BUTTON, self.OnStopButton, btn)
btnSizer.Add(btn, 0, wx.EXPAND|wx.ALL, 2)
btn = wx.Button(self, -1, "Refresh", style=wx.BU_EXACTFIT)
self.Bind(wx.EVT_BUTTON, self.OnRefreshPageButton, btn)
btnSizer.Add(btn, 0, wx.EXPAND|wx.ALL, 2)
txt = wx.StaticText(self, -1, "Location:")
btnSizer.Add(txt, 0, wx.CENTER|wx.ALL, 2)
self.location = wx.ComboBox(
self, -1, "", style=wx.CB_DROPDOWN|wx.TE_PROCESS_ENTER)
self.location.AppendItems(['http://wxPython.org',
'http://wxwidgets.org',
'http://google.com'])
self.Bind(wx.EVT_COMBOBOX, self.OnLocationSelect, self.location)
self.location.Bind(wx.EVT_TEXT_ENTER, self.OnLocationEnter)
btnSizer.Add(self.location, 1, wx.EXPAND|wx.ALL, 2)
sizer.Add(btnSizer, 0, wx.EXPAND)
sizer.Add(self.wv, 1, wx.EXPAND)
self.SetSizer(sizer)
self.wv.LoadURL(self.current)
def ShutdownDemo(self):
# put the frame title back
if self.frame:
self.frame.SetTitle(self.titleBase)
# WebView events
def OnWebViewNavigating(self, evt):
# this event happens prior to trying to get a resource
if evt.GetURL() == 'http://www.microsoft.com/':
if wx.MessageBox("Are you sure you want to visit Microsoft?",
style=wx.YES_NO|wx.ICON_QUESTION) == wx.NO:
# This is how you can cancel loading a page.
evt.Veto()
def OnWebViewLoaded(self, evt):
# The full document has loaded
self.current = evt.GetURL()
self.location.SetValue(self.current)
# Control bar events
def OnLocationSelect(self, evt):
url = self.location.GetStringSelection()
self.log.write('OnLocationSelect: %s\n' % url)
self.wv.LoadURL(url)
def OnLocationEnter(self, evt):
url = self.location.GetValue()
self.location.Append(url)
self.wv.LoadURL(url)
def OnOpenButton(self, event):
dlg = wx.TextEntryDialog(self, "Open Location",
"Enter a full URL or local path",
self.current, wx.OK|wx.CANCEL)
dlg.CentreOnParent()
if dlg.ShowModal() == wx.ID_OK:
self.current = dlg.GetValue()
self.wv.LoadURL(self.current)
dlg.Destroy()
def OnPrevPageButton(self, event):
self.wv.GoBack()
def OnNextPageButton(self, event):
self.wv.GoForward()
def OnCheckCanGoBack(self, event):
event.Enable(self.wv.CanGoBack())
def OnCheckCanGoForward(self, event):
event.Enable(self.wv.CanGoForward())
def OnStopButton(self, evt):
self.wv.Stop()
def OnRefreshPageButton(self, evt):
self.wv.Reload()
#----------------------------------------------------------------------
def runTest(frame, nb, log):
win = TestPanel(nb, log)
return win
#----------------------------------------------------------------------
overview = """<html><body>
<h2><center>DemoName</center></h2>
Say something nice here
</body></html>
"""
if __name__ == '__main__':
import sys,os
import run
run.main(['', os.path.basename(sys.argv[0])] + sys.argv[1:])
I can't reproduce it in this demo, when I press Tab to cut to the page I can view it normally.
XLTechie
LeonarddeR
The only other mention of this I could find, was by @JulienCochuyt in https://github.com/nvaccess/nvda/issues/10838#issuecomment-595080150, back in 2020; and someone talking about it on the wx-py mailing list, which got no response in five years.
Steps to reproduce:
Run any application which uses a
wx.html2.WebView. I will provide a sample shortly.Actual behavior:
When attempting to focus on and interact with the HTML document,, its content is not spoken or able to be navigated. The content is definitely there, as
NVDA+Rcan confirm, but normal navigation will never find it. If you force the focus (as described by @JulienCochuyt, or by mouse as I will show with an example app), it can be made to work. But that method is highly un-ideal.Expected behavior:
Preferably, NVDA should switch into browse mode automatically, or should at least be able to manually (although most users won't know to do so).
NVDA logs, crash dumps and other attachments:
System configuration
NVDA installed/portable/running from source:
Installed
NVDA version:
2024.3.1
Windows version:
11, though this was known in 10.
Name and version of other software in use when reproducing the issue:
Python 3.11, WX 4.2.
Other information about your system:
Other questions
Does the issue still occur after restarting your computer?
Yes
Have you tried any other versions of NVDA? If so, please report their behaviors.
This has been going on since at least 2019.3, and probably since
wx.html2became available.If NVDA add-ons are disabled, is your problem still occurring?
Not relevant, but yes.
Does the issue still occur after you run the COM Registration Fixing Tool in NVDA's tools menu?
Not relevant, but yes.