wxpython：wx.html2 是好用的 WebView 组件

wxpython : wx.html2 是好用的 WebView 组件。

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 test_wx_html2.py 如下

# -*- coding: utf-8 -*-
import os
import sys
import wx
import wx.html2 as wbv

# WebView Backends
backends = [
    (wbv.WebViewBackendEdge, 'WebViewBackendEdge'),
    (wbv.WebViewBackendIE, 'WebViewBackendIE'),
    (wbv.WebViewBackendWebKit, 'WebViewBackendWebKit'),
    (wbv.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.
        wbv.WebView.MSWSetEmulationLevel(wbv.WEBVIEWIE_EMU_IE11)

        # If you would like to reset it back to the default (no-emulation) then
        # it can be done by calling this:
        # wbv.WebView.MSWSetEmulationLevel(wbv.WEBVIEWIE_EMU_DEFAULT)

        # Find an available backend
        backend = None
        for id, name in backends:
            available = wbv.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 = wbv.WebView.New(self, backend=backend)

        self.Bind(wbv.EVT_WEBVIEW_NAVIGATING, self.OnWebViewNavigating, self.wv)
        self.Bind(wbv.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",
                                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()


class MyFrame(wx.Frame):    
    def __init__(self):
        super().__init__(parent=None, title='wx.html2 示例', size=(1000, 600))
        self.panel = TestPanel(self, wx.ID_ANY)
        self.Show(True)

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 test_wx_html2.py 

参考: wxpython事件绑定方法的选择和应用