SetTextSize SetTextSizePixels - Why do my text sizes vary?

ROOT
1

Dear Rooters!

I am making a canvas with nine pads, and in each pad I wish to write text with the same textsize!!! Instead I see that my textsizes increase through the loop of drawing the different pads. I am really confused about how the setTextSize function works. Does it use the size from the canvas or the pad? The pads are a little bit different in size, but the canvas is always the same so if this is used I don’t understand why my texts can have different sizes. I tried to work around the problem by using setTextSizePixels, but here I see that it doesn’t matter what size I write, the text-size is still extremely small, it seems that ROOT doesn’t “listen” to my commands. I read about the function that I need to have a font-precision larger than 2 for setTextSizePixles to work, but I cannot find how to set the precision of the font. Please help me! This was an unexpected and extremely frustrating problem!! I simply want to write text in different pads with equal textsize!

Regards,
Karin

2

Example:

root [0] TText t(.5,.5,"hello")
root [1] t.SetTextFont(23);
root [2] t.SetTextSize(22);
root [3] t.Draw()

See: ROOT: TAttText Class Reference

3

perfekt, thank you!

4

Hi @couet
Is there also a possibility to set this “globally” for the whole pad?
I create a new Canvas and want to add several TPaveText boxes all with the same font, size and fill style. However when I try gStyle->SetTextSize(16) all my text boxes seem to be empty.

        c[j] = new TCanvas(canv, canv, 1600, 900);
	gPad->SetLogy(1);
	gStyle->SetFillStyle(0);
	gStyle->SetTextFont(43);
        gStyle->SetTextSize(16);

This is my code and only the SetTextSize command seems to cause problems. When I set the text size for each TPaveText individually it works fine. I also tried the SetTextSizePixles command but that didn’t change anything.

Your help would be much appreciated :slight_smile:

5

Not really, each object in a pad have their own text attributes. moreover some object might have several kind of text. So a global setting as described here would be difficult to implement. May be create you own TStyle setting all the text attributes you need. Or change gStyle texts’ attributes in rootlogon.C

6

Okay, thank you for the info.