How does gStyle->ToggleEventStatus() work?

ROOT
1

Hello, what is the purpose of the ToggleEventStatus, ToggleEditor and ToggleToolBar methods of the TStyle class? I tried to enable EventStatus writing gStyle->ToggleEventStatus without any effect. To enable it, I have to write c->ToggleEventStatus() where c is a TCanvas object.
The same is true for ToggleEditor and ToggleToolBar.

2

They activate the event statut and toolbar on a canvas.
Try:

{
   TCanvas *c1 = new TCanvas("c1", "c1",10,45,700,548);
   c1->ToggleEventStatus();
   c1->ToggleToolBar();
}
3

Hi Olivier,
yes what you propose works perfectly.
The “problem” comes from the class TStyle. It seems I cannot enable EventStatus from “gStyle->ToggleEventStatus()” whereas TStyle provides such method. So I am wondering what is the purpose of these methods in the class TStyle.

4

Yes you are right it has now effect. My guess is that it should turn on the EventStatus for all canvases created after this call.

5

Doing a quick “grep” on the sources it seems that gStyle->GetShowEventStatus() is not used…

6

Yes, this is what I expected, that’s why I asked :smiley:

7

I opened a Jira ticket with this question :
sft.its.cern.ch/jira/browse/ROOT-8023