wxPython/demo/SlashDot.py

   1 #!/usr/bin/python
   2 """This is SlashDot 1.2
   3
   4     It's the obligatory Slashdot.org headlines reader that
   5 any modern widget set/library must have in order to be taken
   6 seriously :-)
   7
   8     Usage is quite simple; wxSlash attempts to download the
   9 'ultramode.txt' file from http://slashdot.org, which
  10 contains the headlines in a computer friendly format. It
  11 then displays said headlines in a wxWindows list control.
  12
  13     You can read articles using either Python's html library
  14 or an external browser. Uncheck the 'browser->internal' menu
  15 item to use the latter option.  Use the settings dialog box
  16 to set which external browser is started.
  17
  18     This code is available under the wxWindows license, see
  19 elsewhere. If you modify this code, be aware of the fact
  20 that slashdot.org's maintainer, CmdrTaco, explicitly asks
  21 'ultramode.txt' downloaders not to do this automatically
  22 more than twice per hour. If this feature is abused,
  23 CmdrTaco may remove the ultramode file completely and that
  24 will make a *lot* of people unhappy.
  25
  26     I want to thank Alex Shnitman whose slashes.pl
  27 (Perl/GTK) script gave me the idea for this applet.
  28
  29     Have fun with it,
  30
  31     Harm van der Heijden (H.v.d.Heijden@phys.tue.nl)
  32 """
  33
  34 from wxPython.wx import *
  35 from httplib import HTTP
  36 from htmllib import HTMLParser
  37 import os
  38 import re
  39 import formatter
  40
  41 class HTMLTextView(wxFrame):
  42     def __init__(self, parent, id, title='HTMLTextView', url=None):
  43         wxFrame.__init__(self, parent, id, title, wxPyDefaultPosition,
  44                          wxSize(600,400))
  45
  46         EVT_CLOSE(self, self.OnCloseWindow)
  47         self.mainmenu = wxMenuBar()
  48
  49         menu = wxMenu()
  50         menu.Append(201, '&Open URL...', 'Open URL')
  51         EVT_MENU(self, 201, self.OnFileOpen)
  52         menu.Append(209, 'E&xit', 'Exit viewer')
  53         EVT_MENU(self, 209, self.OnFileExit)
  54
  55         self.mainmenu.Append(menu, '&File')
  56         self.SetMenuBar(self.mainmenu)
  57         self.CreateStatusBar(1)
  58
  59         self.text = wxTextCtrl(self, -1, "", wxPyDefaultPosition,
  60                                wxPyDefaultSize, wxTE_MULTILINE | wxTE_READONLY)
  61
  62         if (url):
  63             self.OpenURL(url)
  64
  65     def logprint(self, x):
  66         self.SetStatusText(x)
  67
  68     def OpenURL(self, url):
  69         self.url = url
  70         m = re.match('file:(\S+)\s*', url)
  71         if m:
  72             f = open(m.groups()[0],'r')
  73         else:
  74             m = re.match('http://([^/]+)(/\S*)\s*', url)
  75             if m:
  76                 host = m.groups()[0]
  77                 path = m.groups()[1]
  78             else:
  79                 m = re.match('http://(\S+)\s*', url)
  80                 if not m:
  81                     # Invalid URL
  82                     self.logprint("Invalid or unsupported URL: %s" % (url))
  83                     return
  84                 host = m.groups()[0]
  85                 path = ''
  86             f = RetrieveAsFile(host,path,self.logprint)
  87         if not f:
  88             self.logprint("Could not open %s" % (url))
  89             return
  90         self.logprint("Receiving data...")
  91         data = f.read()
  92         tmp = open('tmphtml.txt','w')
  93         fmt = formatter.AbstractFormatter(formatter.DumbWriter(tmp))
  94         p = HTMLParser(fmt)
  95         self.logprint("Parsing data...")
  96         p.feed(data)
  97         p.close()
  98         tmp.close()
  99         tmp = open('tmphtml.txt', 'r')
 100         self.text.SetValue(tmp.read())
 101         self.SetTitle(url)
 102         self.logprint(url)
 103
 104     def OnFileOpen(self, event):
 105         dlg = wxTextEntryDialog(self, "Enter URL to open:", "")
 106         if dlg.ShowModal() == wxID_OK:
 107             url = dlg.GetValue()
 108         else:
 109             url = None
 110         if url:
 111             self.OpenURL(url)
 112
 113     def OnFileExit(self, event):
 114         self.Close()
 115
 116     def OnCloseWindow(self, event):
 117         self.Destroy()
 118
 119
 120 def ParseSlashdot(f):
 121     art_sep = re.compile('%%\r?\n')
 122     line_sep = re.compile('\r?\n')
 123     data = f.read()
 124     list = art_sep.split(data)
 125     art_list = []
 126     for i in range(1,len(list)-1):
 127         art_list.append(line_sep.split(list[i]))
 128     return art_list
 129
 130 def myprint(x):
 131     print x
 132
 133 def RetrieveAsFile(host, path='', logprint = myprint):
 134     try:
 135         h = HTTP(host)
 136     except:
 137         logprint("Failed to create HTTP connection to %s... is the network available?" % (host))
 138         return None
 139     h.putrequest('GET',path)
 140     h.putheader('Accept','text/html')
 141     h.putheader('Accept','text/plain')
 142     h.endheaders()
 143     errcode, errmsg, headers = h.getreply()
 144     if errcode != 200:
 145         logprint("HTTP error code %d: %s" % (errcode, errmsg))
 146         return None
 147     f = h.getfile()
 148 #    f = open('/home/harm/ultramode.txt','r')
 149     return f
 150
 151
 152 class AppStatusBar(wxStatusBar):
 153     def __init__(self, parent):
 154         wxStatusBar.__init__(self,parent, -1)
 155         self.SetFieldsCount(2)
 156         self.SetStatusWidths([-1, 100])
 157         self.but = wxButton(self, 1001, "Refresh")
 158         EVT_BUTTON(self, 1001, parent.OnViewRefresh)
 159         EVT_SIZE(self, self.OnSize)
 160         self.OnSize(None)
 161
 162     def logprint(self,x):
 163         self.SetStatusText(x,0)
 164
 165     def OnSize(self, event):
 166         rect = self.GetFieldRect(1)
 167         self.but.SetPosition(wxPoint(rect.x+2, rect.y+2))
 168         self.but.SetSize(wxSize(rect.width-4, rect.height-4))
 169
 170 # This is a simple timer class to start a function after a short delay;
 171 class QuickTimer(wxTimer):
 172     def __init__(self, func, wait=100):
 173         wxTimer.__init__(self)
 174         self.callback = func
 175         self.Start(wait); # wait .1 second (.001 second doesn't work. why?)
 176     def Notify(self):
 177         self.Stop();
 178         apply(self.callback, ());
 179
 180 class AppFrame(wxFrame):
 181     def __init__(self, parent, id, title):
 182         wxFrame.__init__(self, parent, id, title, wxPyDefaultPosition,
 183                          wxSize(650, 250))
 184
 185         # if the window manager closes the window:
 186         EVT_CLOSE(self, self.OnCloseWindow);
 187
 188         # Now Create the menu bar and items
 189         self.mainmenu = wxMenuBar()
 190
 191         menu = wxMenu()
 192         menu.Append(209, 'E&xit', 'Enough of this already!')
 193         EVT_MENU(self, 209, self.OnFileExit)
 194         self.mainmenu.Append(menu, '&File')
 195         menu = wxMenu()
 196         menu.Append(210, '&Refresh', 'Refresh headlines')
 197         EVT_MENU(self, 210, self.OnViewRefresh)
 198         menu.Append(211, '&Slashdot Index', 'View Slashdot index')
 199         EVT_MENU(self, 211, self.OnViewIndex)
 200         menu.Append(212, 'Selected &Article', 'View selected article')
 201         EVT_MENU(self, 212, self.OnViewArticle)
 202         self.mainmenu.Append(menu, '&View')
 203         menu = wxMenu()
 204         menu.Append(220, '&Internal', 'Use internal text browser',TRUE)
 205         menu.Check(220, true)
 206         self.UseInternal = 1;
 207         EVT_MENU(self, 220, self.OnBrowserInternal)
 208         menu.Append(222, '&Settings...', 'External browser Settings')
 209         EVT_MENU(self, 222, self.OnBrowserSettings)
 210         self.mainmenu.Append(menu, '&Browser')
 211         menu = wxMenu()
 212         menu.Append(230, '&About', 'Some documentation');
 213         EVT_MENU(self, 230, self.OnAbout)
 214         self.mainmenu.Append(menu, '&Help')
 215
 216         self.SetMenuBar(self.mainmenu)
 217
 218         if wxPlatform == '__WXGTK__':
 219             # I like lynx. Also Netscape 4.5 doesn't react to my cmdline opts
 220             self.BrowserSettings = "xterm -e lynx %s &"
 221         elif wxPlatform == '__WXMSW__':
 222             # netscape 4.x likes to hang out here...
 223             self.BrowserSettings = '\\progra~1\\Netscape\\Communicator\\Program\\netscape.exe %s'
 224         else:
 225             # a wild guess...
 226             self.BrowserSettings = 'netscape %s'
 227
 228         # A status bar to tell people what's happening
 229         self.sb = AppStatusBar(self)
 230         self.SetStatusBar(self.sb)
 231
 232         self.list = wxListCtrl(self, 1100, style=wxLC_REPORT)
 233         self.list.InsertColumn(0, 'Subject')
 234         self.list.InsertColumn(1, 'Date')
 235         self.list.InsertColumn(2, 'Posted by')
 236         self.list.InsertColumn(3, 'Comments')
 237         self.list.SetColumnWidth(0, 300)
 238         self.list.SetColumnWidth(1, 150)
 239         self.list.SetColumnWidth(2, 100)
 240         self.list.SetColumnWidth(3, 100)
 241
 242         EVT_LIST_ITEM_SELECTED(self, 1100, self.OnItemSelected)
 243         EVT_LEFT_DCLICK(self.list, self.OnLeftDClick)
 244
 245         self.logprint("Connecting to slashdot... Please wait.")
 246         # wxYield doesn't yet work here. That's why we use a timer
 247         # to make sure that we see some GUI stuff before the slashdot
 248         # file is transfered.
 249         self.timer = QuickTimer(self.DoRefresh, 1000)
 250
 251     def logprint(self, x):
 252         self.sb.logprint(x)
 253
 254     def OnFileExit(self, event):
 255         self.Destroy()
 256
 257     def DoRefresh(self):
 258         f = RetrieveAsFile('slashdot.org','/ultramode.txt',self.sb.logprint)
 259         art_list = ParseSlashdot(f)
 260         self.list.DeleteAllItems()
 261         self.url = []
 262         self.current = -1
 263         i = 0;
 264         for article in art_list:
 265             self.list.InsertStringItem(i, article[0])
 266             self.list.SetStringItem(i, 1, article[2])
 267             self.list.SetStringItem(i, 2, article[3])
 268             self.list.SetStringItem(i, 3, article[6])
 269             self.url.append(article[1])
 270             i = i + 1
 271         self.logprint("File retrieved OK.")
 272
 273     def OnViewRefresh(self, event):
 274         self.logprint("Connecting to slashdot... Please wait.");
 275         wxYield()
 276         self.DoRefresh()
 277
 278     def DoViewIndex(self):
 279         if self.UseInternal:
 280             self.view = HTMLTextView(self, -1, 'slashdot.org',
 281                                      'http://slashdot.org')
 282             self.view.Show(true)
 283         else:
 284             self.logprint(self.BrowserSettings % ('http://slashdot.org'))
 285             #os.system(self.BrowserSettings % ('http://slashdot.org'))
 286             wxExecute(self.BrowserSettings % ('http://slashdot.org'))
 287         self.logprint("OK")
 288
 289     def OnViewIndex(self, event):
 290         self.logprint("Starting browser... Please wait.")
 291         wxYield()
 292         self.DoViewIndex()
 293
 294     def DoViewArticle(self):
 295         if self.current<0: return
 296         url = self.url[self.current]
 297         if self.UseInternal:
 298             self.view = HTMLTextView(self, -1, url, url)
 299             self.view.Show(true)
 300         else:
 301             self.logprint(self.BrowserSettings % (url))
 302             os.system(self.BrowserSettings % (url))
 303         self.logprint("OK")
 304
 305     def OnViewArticle(self, event):
 306         self.logprint("Starting browser... Please wait.")
 307         wxYield()
 308         self.DoViewArticle()
 309
 310     def OnBrowserInternal(self, event):
 311         if self.mainmenu.Checked(220):
 312             self.UseInternal = 1
 313         else:
 314             self.UseInternal = 0
 315
 316     def OnBrowserSettings(self, event):
 317         dlg = wxTextEntryDialog(self, "Enter command to view URL.\nUse %s as a placeholder for the URL.", "", self.BrowserSettings);
 318         if dlg.ShowModal() == wxID_OK:
 319             self.BrowserSettings = dlg.GetValue()
 320
 321     def OnAbout(self, event):
 322         dlg = wxMessageDialog(self, __doc__, "wxSlash", wxOK | wxICON_INFORMATION)
 323         dlg.ShowModal()
 324
 325     def OnItemSelected(self, event):
 326         self.current = event.m_itemIndex
 327         self.logprint("URL: %s" % (self.url[self.current]))
 328
 329     def OnLeftDClick(self, event):
 330         (x,y) = event.Position();
 331         # Actually, we should convert x,y to logical coords using
 332         # a dc, but only for a wxScrolledWindow widget.
 333         # Now wxGTK derives wxListCtrl from wxScrolledWindow,
 334         # and wxMSW from wxControl... So that doesn't work.
 335         #dc = wxClientDC(self.list)
 336         ##self.list.PrepareDC(dc)
 337         #x = dc.DeviceToLogicalX( event.GetX() )
 338         #y = dc.DeviceToLogicalY( event.GetY() )
 339         id = self.list.HitTest(wxPoint(x,y))
 340         #print "Double click at %d %d" % (x,y), id
 341         # Okay, we got a double click. Let's assume it's the current selection
 342         wxYield()
 343         self.OnViewArticle(event)
 344
 345     def OnCloseWindow(self, event):
 346         self.Destroy()
 347
 348
 349 #---------------------------------------------------------------------------
 350 # if running standalone
 351
 352 if __name__ == '__main__':
 353     class MyApp(wxApp):
 354         def OnInit(self):
 355             frame = AppFrame(NULL, -1, "Slashdot Breaking News")
 356             frame.Show(true)
 357             self.SetTopWindow(frame)
 358             return true
 359
 360     app = MyApp(0)
 361     app.MainLoop()
 362
 363
 364
 365 #---------------------------------------------------------------------------
 366 # if running as part of the Demo Framework...
 367
 368 def runTest(frame, nb, log):
 369     win = AppFrame(NULL, -1, "Slashdot Breaking News")
 370     frame.otherWin = win
 371     win.Show(true)
 372
 373
 374 overview = __doc__
 375
 376
 377 #----------------------------------------------------------------------------
 378
 379