Hi Annalisa, Thanks! Your empirical Idea is fair! But unfortunately form the canvas.C i see that Root initialises with the name "line" one TLine pointer at first, for the first TLine; then Root reassigns to the same pointer all the next TLines I draw....... Nevertheless I can modify at any time, with the mouse, all the TLines I have drawn. This means that Root must keep into some of its memory the information about the ID of each TLine. I need to know (for implementing an automathic routine) such an address for each TLine! That is the problem! Tommaso On Fri, 7 Jun 2002, Annalisa De Caro wrote: > Hi Tommaso, > i don't understand very well your question. > If you need to know the pointer to the lines drawn in a canvas, you can > save this canvas as .C file and you can see the file content; > ex: > root [0] new TCanvas(); > open the Editor menu, clik on Line button and draw the first line on the > canvas, clik on Line button an other time and draw the second line ... > Then, you can go on File menu and in Save As canvas.C; > the file c1.C was created. You can see the content... > I don't know if this can help you... > Ciao > Annalisa > > > Hi Rooters, > > My question in the subject is because if i draw a TLine with the Editor on > > a plot, > > I get a pointer to it simply with > > > > TLine *l = TLine; > > > > > > But if I draw more than one line, I don't know how to get the pointer to > > the newer ones. (If I right-click with the mouse on the line, i get as the > > header name TLine only, instead of for example TLine::pippo). > > > > Anyone can help? > > > > Thanks a lot, > > Tommaso > > > > > > > > > > > >
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