[Qt-interest] Widget to use on Model/View

[Arnold Krille]

Hi,

On Thursday 20 August 2009 07:03:26 João Mesquita wrote:
> I am developing an application that has a console like interface and I
> thought of using QListView to represent this console. Each line on the
> console would be an item that is then appended to the QListView model. The
> advantage of using such a widget is that the console log messages can be
> sorted easily. I could easily make checkboxes to hide certain messages that
> do not belong to certain log levels or apply Regex or even filters using a
> custom QSortProxyModel. If anyone is familiar with Wireshark, that is
> exactly the same behavior I am trying to achieve.
> Problem here is performance. When sorting, not a problem, but when
> inserting a large number of lines per second, I make the UI unresponsive
> and even unusable. Should I change the widget, the model or not possible at
> all?

For these requirements you should write your own model (its not that hard!). 
When appending new lines, you would then cache the indizes of the new rows 
until a certain amount of time has passed (like 0.1 seconds). Otherwise the 
gui (and all asorted proxymodels used for sorting and filtering) would update 
on every appended/changed row, which makes the gui very slow when lots of 
lines are appended.

Arnold
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