Hi Wayne, On 11/29/2017 06:35 PM, Wayne Stambaugh wrote: [snip]>> KIGFX::VIEW* view = s_PcbEditFrame->GetGalCanvas()->GetView(); >> item->MethodThatModifiesTheItemState(); >> view->Update( item ); > > Is this safe? What happens when pcbnew is using the legacy canvas?
This is safe as long as view != nullptr, which normally is true. VIEW::Update() is a lightweight method that only marks VIEW_ITEMs as dirty, so they are updated the next time VIEW is drawn. When legacy canvas is active, VIEW_ITEMs are marked as dirty and never refreshed, nothing more happens. Regards, Orson
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