Dear all,
I seem to make something really stupid. I want to set the x- and y-axis title
of the most recent drawn histogram automatically; so I dont know the explicit
histogram name. This is my approach:
===== a macro ========================================
{
if (gPad) {
TList *list = gPad->GetListOfPrimitives();
TObject *obj = list->First();
while(obj) {
int cmpval = strncmp("TH", obj->ClassName(), 2);
if( !cmpval ) {
TH1 *hey = (TH1 *) obj;
hey->SetXTitle("aaa");
hey->SetYTitle("bbb");
}
obj = list->After(obj);
}
}
}
===== end a macro ====================================
for some odd reasons the macro implementation works, but as soon as I copy the
above snippet into a function and compile it with my root application it
doesnt work:
in my linkdef I've added the line:
#pragma link C++ function afunc;
===== afunc ==========================================
void afunc() {
if (gPad) {
TList *list = gPad->GetListOfPrimitives();
TObject *obj = list->First();
while(obj) {
int cmpval = strncmp("TH", obj->ClassName(), 2);
if( !cmpval ) {
TH1 *hey = (TH1 *) obj;
hey->SetXTitle("aaaaa");
hey->SetYTitle("bbbbb");
}
obj = list->After(obj);
}
}
}
=============================================================
at the x axis nothing is displayed, at the y axis the string "aaaaa" is
displayed,..
I seem to miss something,.. does anybody know, where the problem is?
Thanks for your time!
Cheers,
Selim
--
Selim Issever | Tel: 040 8998-2843 +- "Unser Oertchen ist viel ----
DESY-F15 | Fax: 040 8998-4033 +- aelter als euer Scheiss-Marl.
Notkestr. 85 | selim.issever@desy.de +------- Diplomand ------------
22603 Hamburg/Germany | http://www.physik.uni-dortmund.de/~issevers
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