Can someone explain the following:
TCanvas xxx("xxx", "Canvas x");
TPad* yyy=new TPad("yyy", "Pad y", 0, 0, 1, 1);
xxx.cd();
yyy->Draw();
xxx.Clear()
delete yyy;
results in a segmentation violation. My understanding of TPad is that the
Clear() method should perform the inverse function of draw i.e. in this
case, it should remove TPad *yyy from the list of primitives kept by xxx.
Thus, it should be safe to delete or redraw *yyy once it has been Cleared
from its parent. This doesn't seem to be the case. Are the primitives
deleted when they're Cleared? This brings up a related question of who
owns the graphical primitives once they have been Drawn. I haven't seen
any discussion of this anywhere in the (www) root documentation.
Ciao,
John
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