On 25 Dec 2011, at 02:24, Greg Ercolano wrote:
> On 12/23/11 11:06, Greg Ercolano wrote:
>> On 12/22/11 12:27, David FLEURY wrote:
>>> You are right, I will see for a Tree Item solution, to avoid regression
>>> somewhere else.
>>> I do not know well enough fltk to have any opinion on this subject.
>>> Just try to make my tests work for my own configuration.
>>
>> I was noodling with creating an Fl_Tree of 65536 in size,
>> and I can definitely see some room for optimization;
>> adding elements is slow, and scrolling elements is slow.
>>
>> I'll see if I can take a stab at optimizing that so that
>> adding elements is quicker, and also changing the draw()
>> routine so that it only draws items that are within the window.
>
> OK, just checked in r9216 which should optimize Fl_Tree
> quite a bit. David, please give it a try:
>
> Adding items in a large linear list should be quite a bit
> faster now; the slowness was due to repeat calls to find_child()
> unnecessarily to figure out the insert point, which was causing
> the exponential slowness.
>
> Drawing items should be much faster and should not suffer
> the wraparound issues described, because now draw() only draws
> items whose y() positions are within the Fl_Tree xywh area.
>
> I tested with the following code that creates 100k items
> which is entirely unusable in r9215 and lower, but should be
> quite normal in r9216 and up.
>
> There is still a practical limit on the number of items that
> can be in the tree; draw() will still /consider/ (ie. do calculations
> on) items that are not hidden (ie. open() and visible()), but at least
> it won't try to /draw/ items unless they're inside the window.
>
Hi Greg - Just tested the new version, it works great! There's one little bug
though: the "connections" between the items are sometimes missing. To reproduce:
launch test/tree
set "Line style" to "Dotted" or "Solid"
open the "Ascending" and "Descending" items
scroll down
Look how the lines connecting ROOT, Bbb, etc. disappear/reappear when you
scroll up and down.
Christophe
> --------------------------------------------------------------------
>
> #include <FL/Fl.H>
> #include <FL/Fl_Double_Window.H>
> #include <FL/Fl_Tree.H>
> int main( int argc, char **argv) {
> Fl_Double_Window *w = new Fl_Double_Window(900,300);
> Fl_Tree *b = new Fl_Tree(10,10,w->w()-20,w->h()-20);
> char s[80];
> for ( int t=0; t<60000; t++ )
> {
> sprintf(s, "Entry #%06d", t);
> b->add(s);
> if ( t % 50 == 0 ) printf("Working on %d\n", t);
> }
> w->resizable(b);
> w->end();
> w->show();
> return(Fl::run());
> }
> --------------------------------------------------------------------
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--
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science
http://www.montefiore.ulg.ac.be/~geuzaine
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