Hi Matthieu,
I am not sure that it is a good idea to put a TButton in a TCanvas when
the button can clear the canvas. Use a simple TControlBar object instead
or better use a real GUI button. See examples in $ROOTSYS/test/guitest.cxx
or guiviewer.cxx
Rene Brun
Matthieu Tristram wrote:
>
> Hi Rooters !
>
> I'm a new user of ROOT, and I have a little problem when I want to close a
> TCanvas.
> I want to make a sort of Navigation Bar for several plots, so I have a
> code like :
>
> void Plot_test() {
> TCanvas *test = new TCanvas("test", "TEST", 10, 10, 500, 200);
>
> test->Clear();
> TPad *testCanvas_1 = new TPad("testCanvas_1",
> "testCanvas_1",0.00117096,0.110843,0.998829,0.998795);
> ...
> my plot
> ...
> testCanvas_2 = new TPad("testCanvas_2",
> "testCanvas_2",0.00117096,0.00120482,0.998829,0.110843);
> testCanvas_2->Draw();
> TButton *button = new
> TButton("Close","test->Close();",0.131455,0.10989,0.275822,0.89011);
> button->Draw();
>
> TButton *but1 = new TButton("Next", "test->Close();Plot_test();", 0.60,
> 0.1, 0.75, 0.9);
> but1->Draw();
>
> test->cd();
> }
>
> And it happens several times that when a click on the Next button, a "***
> Break *** segmentation violation" appears.
> I test some other way to close my TCanvas, but it seems to be the most
> stable.
>
> I'm using Root 3.00/06.
>
> Can anybody help me ?
>
> Regards.
> Matthieu Tristram.
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