On Wed, Nov 24, 2010 at 11:30 AM, Michael MacFadden < [email protected]> wrote:
> All, > > I am about halfway through implementing the new style inline thread > indicators showing the count of read/unread blips. I have faked the > current count numbers to this point, focusing mainly on the rendering > issues. I am ready to takle the count and read / unread state > changes. I had a couple questions I was hoping the community might be > able to help with: > I'll answer some of the questions below, and the answers are according to the current behaviour of wave.google.com. These are not always the best answers are open for debate. > > 1) > > What are the rules for total blip count? Counts all the blips in the subtree from the anchor. > I would assume we only want > to count the blips that will be visible. There seems to be blips in > the conversation thread that might not be visible. > > Threads shouldn't be invisible. The only time they are hidden is where there are no blips inside. > 2) > > Right now I can only ask the conversation thread for an iterator of > the blips. There doesn't seem to be a convenient way to get the count > of blips, short of calling getBlips() and iterating through them. > This could be added. > The best way is to add a more efficient mechanism. One way I can think of is to add a counter on the thread that counts the total number of children (including descendants) in its subtree. This means every time you add or remove a blip, you'd need to up date those numbers for every thread all the way to the root. > > 3) > > I assume I can use the SupplementImpl class to see if a Blip is read > or not during rendering. > > 4) > > I know that I COULD respond to the edit actions like continuation and > delete to trigger and update of the count, however this would be the > wrong approach because it wouldn't handle when some one else is > adding / removing blips. To this point I haven't seen how to observe > state changes in the conversation model and trigger rendering events. > I.e. how do I notice another user has added a blip in some other > browser so I can trigger calling my Dom Impl class to update the count > in my browser. > > I just haven't been introduced to this event mechanism yet. > The best is to listen on blip add and remove events rather than editing session. > > > Thanks in advance. > > ~Michael > -- David Wang -- You received this message because you are subscribed to the Google Groups "Wave Protocol" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/wave-protocol?hl=en.
