Scroll Area and Widgets repaint
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I have hundreds of widgets added in scroll area.
I get an update of widget displayed information in every 20 seconds.
Sometimes I add more widget too on run time.Will it slow down the UI if I perform update of information on all widgets.
Though only 5 widgets are displayed on one page.Should I perform update on all widgets or only on the displayed page.
UI is finger touch and scrolling has to be enabled on finger movement.Any suggestions.
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Hi,
first of all, if you have hunders of widgets in a scroll view, why don't you use a model/view aproach? Table, List etc.
Second, if you do it all 20 seconds, I think it should not be a problem. If you only update the visible stuff, you have to take care of all others during scroll operations for refilling them :-(
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Thank you so much!
I think then I am good to go because I am doing model/view approach.
Where I have a separate singleton class which contains data containers and keep updating it.
Whenever there is change in data containers, it emits a signal to UI Class and it updates information for all widgets.When I update all widgets, does it repaints all of them or the displayed page?
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[quote author="sVirgo" date="1318016313"]Thank you so much!
I think then I am good to go because I am doing model/view approach.
Where I have a separate singleton class which contains data containers and keep updating it.
Whenever there is change in data containers, it emits a signal to UI Class and it updates information for all widgets.
[/quote]If you say you use the MV approach, why dou you have to update multiple widgets? If you cvhange data in a model, you just call emit dataChanged() and it updates the connected views.
[quote author="sVirgo" date="1318016313"]
When I update all widgets, does it repaints all of them or the displayed page?
[/quote]AFAIK there is some logic behind repaint, which should clip out invisible widgets.