Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado
Inconsistency in the position of the text() function
Hi, I'm a bit puzzled by how the position parameter of the text function works. I expect something and get something else... Here is a short example: p = plot(/test) tl = text(0.5,0.8,'test', alignment=0.0) tc = text(0.5,0.7,'test', alignment=0.5) tr = text(0.5,0.6,'test', alignment=1.0) pl = polyline([0.5,0.5],[0.0,1.0],'r2',/norm) This is all fine. If I now set the alignment parameter (to the same value!), I get what I expect (no change): tl.alignment=0.0 tc.alignment=0.5 tr.alignment=1.0 But if I set the position parameter, everything is center justified: tl.position=[0.5,0.8] tc.position=[0.5,0.7] tr.position=[0.5,0.6] Now the text is centered on the position keyword and the "alignment" parameter is not respected anymore. Is this what one expects? I didn't expect this... Cheers, Helder
Re: Inconsistency in the position of the text() function
On Friday, June 19, 2015 at 2:42:23 AM UTC-6, Helder wrote: > Hi, > I'm a bit puzzled by how the position parameter of the text function works. > I expect something and get something else... > Here is a short example: > > p = plot(/test) > tl = text(0.5,0.8,'test', alignment=0.0) > tc = text(0.5,0.7,'test', alignment=0.5) > tr = text(0.5,0.6,'test', alignment=1.0) > pl = polyline([0.5,0.5],[0.0,1.0],'r2',/norm) > > This is all fine. If I now set the alignment parameter (to the same value!), I get what I expect (no change): > > tl.alignment=0.0 > tc.alignment=0.5 > tr.alignment=1.0 > > But if I set the position parameter, everything is center justified: > > tl.position=[0.5,0.8] > tc.position=[0.5,0.7] > tr.position=[0.5,0.6] > > Now the text is centered on the position keyword and the "alignment" parameter is not respected anymore. > > Is this what one expects? I didn't expect this... > > Cheers, > Helder Hi Helder, This was indeed a bug. It's been fixed for IDL 8.5. Thanks for catching it and providing such a nice reproduce case. Cheers, Chris
On Monday, June 22, 2015 at 7:46:02 PM UTC+2, Chris Torrence wrote: > On Friday, June 19, 2015 at 2:42:23 AM UTC-6, Helder wrote: >> Hi, >> I'm a bit puzzled by how the position parameter of the text function works. >> I expect something and get something else... >> Here is a short example: >> >> p = plot(/test) >> tl = text(0.5,0.8,'test', alignment=0.0) >> tc = text(0.5,0.7,'test', alignment=0.5) >> tr = text(0.5,0.6,'test', alignment=1.0) >> pl = polyline([0.5,0.5],[0.0,1.0],'r2',/norm) >> >> This is all fine. If I now set the alignment parameter (to the same value!), I get what I expect (no change): >> >> tl.alignment=0.0 >> tc.alignment=0.5 >> tr.alignment=1.0 >> >> But if I set the position parameter, everything is center justified: >> >> tl.position=[0.5,0.8] >> tc.position=[0.5,0.7] >> tr.position=[0.5,0.6] >> >> Now the text is centered on the position keyword and the "alignment" parameter is not respected anymore. >> >> Is this what one expects? I didn't expect this... >> >> Cheers, >> Helder > > Hi Helder, > > This was indeed a bug. It's been fixed for IDL 8.5. Thanks for catching it and providing such a nice reproduce case. > > Cheers, > Chris Hi Chris, thanks for that. Helps a lot. Cheers, Helder