Fontsize of Axis Labels in TMultiGraph

ROOT
1

Hello,

I’m facing an issue with TMultiGraph and SetLabelSize. When I set the size of the axis-labels via SetLabelSize to my desired value and then I do a UnZoom on the y-axis, the size of axis-labels on the y-axis and even on the x-axis gets reset to some kind of default value.

Please see the following example, which is basically a stripped-down version of the fifth example of the TMultiGraph class documentation.

[code]{
TCanvas *c3 = new TCanvas(“c3”,“c3”,600, 400);

TMultiGraph * mg = new TMultiGraph(“mg”,“mg”);

const Int_t size = 10;

double x[size];
double y1[size];

for ( int i = 0; i < size ; ++i ) {
x[i] = i;
y1[i] = size - i;
}

TGraph * gr1 = new TGraph( size, x, y1 );

mg->Add( gr1 );

mg->Draw(“AL*”);

mg->GetXaxis()->SetLabelSize(0.015);
mg->GetYaxis()->SetLabelSize(0.015);

return c3;
}[/code]

After executing that, please go with the mouse on the y-axis and do “UnZoom”. You should see the fontsize of the x- and y-axis changing.

I’m using ROOT 5.34/07 (tags/v5-34-07@49362, Apr 26 2013, 13:01:34 on win32).

Thanks for discussion,
Christian

2

I see it when I unzoom the Y axis only. I’ll check.

3

I can confirm. It’s only when unzooming the y-axis, not when unzooming the x-axis.

4

Now fixed in the trunk an in 5.34.

5

Thank you so much!

6

Sorry to come back to this so late, but due to our IT company policy I’m not able to tell my IT department to install updates within a narrow time frame.

I now got the update to ROOT 5.34/13 (v5-34-13@v5-34-13, Dec 01 2013, 12:01:56 on win32) and tested the provided example again.

Please zoom to the y axis and after that do an unzoom. You will see the labels of x and y axis still resized.

7

for me it is fixed …
have you reinstalled the latest root ?
is it on windows only ?

8

I don’t know if it’s the “latest” ROOT. As mentioned in my previous post, after the recent update here it’s now version 5.34/13, which was the latest pro version as of last week. I guess, this should include your fix from a couple of months ago.

Also, I don’t have access to a non-windows version.

From what I remember about the issue back then, the behaviour has now slightly changed: Back then, you just had to click “unzoom” on the y axis.

Now, you have to actually first zoom into the y axis and after that do an unzoom. Then, you see the fontsize for the x and the y axis changing. I want to highlight, that this issue does not occur on zooming actions on the x axis.

9

ok … i see … will check…

10

In fact this fixed had very bad side effects and I was obliged to make some workaround which seems to
not be satisfactory… see sft.its.cern.ch/jira/browse/ROOT-5671?filter=-1
We must be careful there … the current state is “better” than the side effects it produced.