If this is the tutorial by Jono Bacon on Youtube, launch glade with quickly design and add a button to the toolbar similar to the refresh button that Jono adds ~12:30. Call it backbutton and create a handler for it when clicked and then sketch a function that will pull the previous URL that was passed (just create a list and append successful URLs to it, then pop it when needed). If you want to preprocess a URL entered in the entrybox, add code in the handler to do it. Here's some sample code:
#Code for other initializing....
....whatever goes here...
self.history=[]
def on_urlentry_activate(self,widget):
#store previous location in history
self.history.append(self.webview.get_uri())
url = widget.get_text()
#add http:// if not present in the url
if 'http://' not in url:
url='http://'+url
self.webview.open(url)
def on_backbutton_activate(self,widget):
#Only get the last url if there's something to get
if len(self.history)!=0:
#Use pop to remove the last entry from the list
url=self.history.pop()
self.webview.open(url)
This code is not very sophisticated, but should give you the idea.
As Timo has pointed out, WebKitGTK has a number of great functions and features including a go_back() method (If you read the manual). Here's a callback function which uses it:
def on_backbutton_activate(self, widget):
if self.webview.can_go_back():
self.webview.go_back()
