Re: Changing the color of a TNode
Rene Brun (Rene.Brun@cern.ch)
Thu, 01 Oct 1998 18:13:10 +0200
>
> Does anyboy know how to change the color of a TNode after
> having constructed it ?
>
> I tried e.g. in following the example (copied from the
> tutorial), but I did not succeed.
>
> Thanks,
> Ivar.
>
> {
> gROOT->Reset();
> c1 = new TCanvas("c1","Geometry Shapes",200,10,700,500);
> brik = new TBRIK("BRIK","BRIK","void",200,150,150);
> trd1 = new TTRD1("TRD1","TRD1","void",200,50,100,100);
> brik->SetLineColor(1);
> trd1->SetLineColor(2);
>
> node1 = new TNode("NODE1","NODE1","BRIK");
> node1->cd();
> node2 = new TNode("NODE2","NODE2","TRD1",0,0,-1000);
> node1->cd();
>
> // changing the color after having created the nodes does not work
> brik->SetLineColor(4);
> trd1->SetLineColor(5);
>
> node1->Modified();
> node1->Draw();
> c1->Update();
> }
Ivar,
As implied by your question, you want to change the TNode color,
use TNode::SetLineColor.
I have simplified your macro below.
Rene Brun
{
gROOT->Reset();
c1 = new TCanvas("c1","Geometry Shapes",200,10,700,500);
brik = new TBRIK("BRIK","BRIK","void",200,150,150);
trd1 = new TTRD1("TRD1","TRD1","void",200,50,100,100);
node1 = new TNode("NODE1","NODE1","BRIK");
node1->cd();
node2 = new TNode("NODE2","NODE2","TRD1",0,0,-1000);
node1->cd();
// changing the color after having created the nodes does not work
node1->SetLineColor(4);
node2->SetLineColor(5);
node1->Draw();
c1->Update();
}