The last post mentions about retrieving RSS feeds. To allow easy viewing, a GUI is constructed. The GUI is built using wxpython and consists of few adjustable pane with scrolling enabled. The user can choose to display the different group (eg: “World” and “SG” news) in separate panels.
For live updates, a wx.timer function is added to the GUI so the data can update every x time specified by the users. This post highlights the use of wx MultiSplitterWindow, scrollable panels and wx.timer for feeds live updates.
import os, sys, re, time
import wx
from wx.lib.splitter import MultiSplitterWindow
from General_feed_extract import FeedsReader
import wx.lib.scrolledpanel as scrolled
class SamplePane(scrolled.ScrolledPanel):
"""
Just a simple test window to put into the splitter.
Set to scrollable, set to word wrap
"""
def __init__(self, parent, label):
scrolled.ScrolledPanel.__init__(self, parent,style = wx.BORDER_SUNKEN)
#self.SetBackgroundColour(colour)
self.textbox = wx.TextCtrl(self, -1, label,style=wx.TE_MULTILINE )
vbox = wx.BoxSizer(wx.VERTICAL)
vbox.Add(self.textbox, 1, wx.ALIGN_LEFT | wx.ALL|wx.EXPAND, 5)
self.SetSizer(vbox)
self.SetAutoLayout(1)
self.SetupScrolling()
self.SetupScrolling()
def SetOtherLabel(self, label):
self.textbox.SetValue(label)
self.SetupScrolling()
class MyPanel(wx.Panel):
def __init__(self, parent):
wx.Panel.__init__(self, parent, -1)
self.parent = parent
## Add in the feeds parameters
self.reader = FeedsReader()
## Add in timer
self.timer = wx.Timer(self)
self.Bind(wx.EVT_TIMER, self.on_timer_update_feeds, self.timer)
self.timer.Start(30000) # start timer after a delay, time in milli sec
splitter = MultiSplitterWindow(self, style=wx.SP_LIVE_UPDATE)
self.splitter = splitter
sizer = wx.BoxSizer(wx.HORIZONTAL)
sizer.Add(splitter, 1, wx.EXPAND)
self.SetSizer(sizer)
self.world_news_panel = SamplePane(splitter, "Panel One")
splitter.AppendWindow(self.world_news_panel, 140)
self.SG_panel = SamplePane(splitter, "Panel Two")
#self.SG_panel.SetMinSize(self.SG_panel.GetBestSize())
splitter.AppendWindow(self.SG_panel, 180)
self.others_panel = SamplePane(splitter, "Panel Three")
splitter.AppendWindow(self.others_panel, 105)
## Set the orientation
self.splitter.SetOrientation(wx.VERTICAL)
## Updates the panel
self.update_panels()
def get_feeds(self):
""" Run the get feeds class. Use for getting updates of the feeds.
"""
self.reader.parse_rss_sites_by_cat()
def update_panels(self):
""" Update all the panels with the updated feeds.
Can use the set other label method
"""
self.get_feeds()
self.update_SG_panel()
self.update_world_panel()
def update_world_panel(self):
""" Update World_panel on the World news.
"""
date_key = self.reader.set_last_desired_date(0)
if self.reader.rss_results_dict_by_cat['World'].has_key(date_key):
World_news_list = self.reader.rss_results_dict_by_cat['World'][date_key]
World_news_str = '\n********************\n'.join(['\n'.join(n) for n in World_news_list])
self.world_news_panel.SetOtherLabel(World_news_str)
def update_SG_panel(self):
""" Update SG_panel on the Singapore stock news.
"""
date_key = self.reader.set_last_desired_date(0)
if self.reader.rss_results_dict_by_cat['SG'].has_key(date_key):
SG_news_list = self.reader.rss_results_dict_by_cat['SG'][date_key]
SG_news_str = '\n********************\n'.join(['\n'.join(n) for n in SG_news_list])
self.SG_panel.SetOtherLabel(SG_news_str)
def on_timer_update_feeds(self,evt):
""" Update feeds once timer reach.
"""
print 'Updating....'
self.update_panels()
def SetLiveUpdate(self, enable):
if enable:
self.splitter.SetWindowStyle(wx.SP_LIVE_UPDATE)
else:
self.splitter.SetWindowStyle(0)
class MyFrame(wx.Frame):
def __init__(self, parent, ID, title):
wx.Frame.__init__(self, parent, ID, title,pos=(150, 20), size=(850, 720))#size and position
self.top_panel = MyPanel(self)
class MyApp(wx.App):
def __init__(self):
wx.App.__init__(self,redirect =False)
self.frame= MyFrame(None,wx.ID_ANY, "Feeds Watcher")
self.SetTopWindow(self.frame)
self.frame.Show()
def run():
try:
app = MyApp()
app.MainLoop()
except Exception,e:
print e
del app
if __name__== "__main__":
run()
The following links contains information on setting up scroll bars in wx and also working with wx.timers.
Simply Python 