How to preserve page position in the wx.html.HtmlWindow after link clicked?
I have a wx python application with wx.html.HtmlWindow window:
class MyHtmlWindow(wx.html.HtmlWindow):
Method SetPage is used to update html content on the window:
def OpenURL(self, url, save_scroll_pos=True)开发者_JS百科:
def callback(src, url, save_scroll_pos):
pos = self.GetViewStart()[1]
self.SetPage(src)
if save_scroll_pos:
self.Scroll(0, pos)
def errback(err):
self.SetPage('<html>Failed:<br>%s</html>' % err.getErrorMessage())
d = self.DownloadURL(url)
d.addCallback(callback, url, save_scroll_pos)
d.addErrback(errback)
I want to save the current scroll position of the page after opening and this code is working. Only one problem, and this is big problem for me: it is rendering html page twice. First after self.SetPage and second after self.Scroll.
So each time I call self.OpenURL I see the page is blinking. It scrolls to the top and right after to the needed position.
I was trying to fix it by handling EVT_PAINT:
self.Bind(wx.EVT_PAINT, self.OnPaintEvt)
But self.OnPaintEvt is calling after self.Scroll - so this way not for me.
Any Ideas?
Great Thanks to Wx Developers. They provide very usefull methods: Freeze and Thaw. This is very easy solution:
def OpenURL(self, url, save_scroll_pos=True):
def callback(src, url, save_scroll_pos):
pos = self.GetViewStart()[1]
self.Freeze()
self.SetPage(src)
if save_scroll_pos:
self.Scroll(0, pos)
self.Thaw()
def errback(err):
self.SetPage('<html>Failed:<br>%s</html>' % err.getErrorMessage())
d = self.DownloadURL(url)
d.addCallback(callback, url, save_scroll_pos)
d.addErrback(errback)
No blinking at all! :-)
加载中,请稍侯......
精彩评论