wxpython : wx.html2 是好用的 WebView 组件。
wx.html2 是wxPython扩展模块中封装得干净漂亮的模块之一，它被设计为允许为每个端口创建多个后端，尽管目前只有一个可用。它与wx.html.HtmlWindow 的不同之处在于，每个后端实际上都是一个完整的渲染引擎，MSW上是Trident, macOS和GTK上是Webkit。wx.html2渲染web文档，对于HTML、CSS和 Javascript都可以有很好的支持。与 CEF 相比，还是有些不足，比如对HTML5 的 audio, video 就支持不好。
pip install wxpython==4.2
wxPython-4.2.0-cp37-cp37m-win_amd64.whl (18.0 MB)
Successfully installed wxpython-4.2.0
cd \Python37\Scripts
wxdemo.exe 取得 wxPython-demo-4.2.0.tar.gz
wxdocs.exe 取得 wxPython-docs-4.2.0.tar.gz
编写 wx_html2.py 如下
# -*- coding: utf-8 -*-
import os
import sys
import wx
import wx.html2 as wh2
# WebView Backends
backends = [
(wh2.WebViewBackendEdge, 'WebViewBackendEdge'),
(wh2.WebViewBackendIE, 'WebViewBackendIE'),
(wh2.WebViewBackendWebKit, 'WebViewBackendWebKit'),
(wh2.WebViewBackendDefault, 'WebViewBackendDefault'),
]
#----------------------------------------------------------------------
class TestPanel(wx.Panel):
def __init__(self, parent, id, frame=None):
wx.Panel.__init__(self, parent, -1)
self.current = "http://localhost:8888"
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.
wh2.WebView.MSWSetEmulationLevel(wh2.WEBVIEWIE_EMU_IE11)
# If you would like to reset it back to the default (no-emulation) then
# it can be done by calling this:
# wh2.WebView.MSWSetEmulationLevel(wh2.WEBVIEWIE_EMU_DEFAULT)
# Find an available backend
backend = None
for id, name in backends:
available = wh2.WebView.IsBackendAvailable(id)
print("Backend 'wx.html2.{}' availability: {}\n".format(name, available))
if available and backend is None:
backend = id
print("Using backend: '{}'\n".format(str(backend, 'ascii')))
# Create the WebView
self.wv = wh2.WebView.New(self, backend=backend)
self.Bind(wh2.EVT_WEBVIEW_NAVIGATING, self.OnWebViewNavigating, self.wv)
self.Bind(wh2.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(['https://fanyi.baidu.com/',
'https://cn.bing.com/',
'https://fanyi.sogou.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()
print('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",
"http://", 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()
class MyFrame(wx.Frame):
def __init__(self):
super().__init__(parent=None, title='wx.html2 示例', size=(1000,600))
self.panel = TestPanel(self, id=wx.ID_ANY)
self.Show()
if __name__ == '__main__':
app = wx.App(False) # False: 意味着不重定向标准输出和错误输出到窗口上
frame = MyFrame()
app.MainLoop()
运行 python wx_html2.py
参考: wxpython事件绑定方法的选择和应用
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