Rene Brun
ROHLFS Reiner wrote:
>
> Hi ROOters,
>
> please have a look to these two ROOT macros:
>
> 1) MakePads.C:
> {
> gROOT->Reset();
>
> // Create a new canvas.
> c1 = new TCanvas("Display","Display",10,10,300,200);
>
> // make the first pad
> pad1 = new TPad("Pad", "Pad", 0.1, 0.1, 0.5, 0.9);
> pad1->SetFillColor(3);
> pad1->Draw();
> pad1->cd();
>
> // make the second pad
> pad2 = new TPad("Pad", "Pad", 0.6, 0.4, 0.9, 0.7);
> pad2->SetFillColor(4);
> pad2->Draw();
>
> c1->SaveAs("pads.root");
> }
>
> and ReadPads.C:
> {
> gROOT->Reset();
>
> TCanvas * c2;
> file = new TFile("pads.root", "READ", "no", 1);
> c2 = (TCanvas*)file->Get("Display");
> c2->Draw();
>
> file->Close();
> }
>
> That is the sequence I call these macros:
> root [1] .x MakePads.C
> ROOT file: pads.root has been created
> root [2] delete c1
> root [3] .x ReadPads.C
>
> But now the pad2 is displayed beside the pad1 directly on the canvas c2. The
> coordinates of pad2 (0.6, 0.4, 0.9, 0.7) are now relative to the canvas c2 and
> not any more relative to the pad1 as defined in the MakePads.C macro.
> Beside that the ExecuteEvent() - function of pad2 does not work any more after
> reading the pads from the root file. ( The pad2 cannot be resized and removed
> using the mouse and the menu of the right mouse button is lost.)
>
> Cheers Reiner.