braedley

I want to put a small logo in a draw widget at the bottom left hand
corner of a tab. The only other thing in the tab is a series of
labels. Right now, the draw widget is being placed just below the
text, and not at the very bottom of the tab like I would like. Summery
of code:

read_jpeg, 'logo.jpg', logo

base=widget_base(title='Wizard', /col)

tab_steps=widget_tab(base)
intro=widget_base(tab_steps, title='Introduction', row=2, xsize=600,
ysize=400)
text_base=widget_base(intro, /base_align_left, col=1)
t1='This wizard will help you set up stuff.'
l1=widget_label(text_base, value=t1)
;there's more labels, but who cares

sz=size(logo)
draw_base=widget_base(intro, /align_left, /base_align_bottom)
logo_win=widget_draw(draw_base, xsize=sz[2], ysize=sz[3],
/align_bottom)

widget_control, base, /realize
widget_control, logo_win, get_value=win
wset, win
tvimage, logo, /keep_aspect_ratio

I've tried various combinations of alignments, but nothing seems to
work. Any suggestions?

While I'm on it, I'm getting black lines around the bottom and left of
the image that aren't present in the original. Is this a tvimage thing
or something else?

david fanning

Braedley writes:


The main problem you are having is that you cannot position
widgets in bulletin board bases in the way you are doing it
(I.e., by setting ALIGN_*** keywords). You have to position
them via OFFSETS from the upper-left hand corner of the base
you are positioning them into. For example, I can get this
logo hear the bottom of the base just by estimating the offsets.
(If I want to get it *exactly* there, I have to get the geometry
of the base and subtract the size of the image from that.)

base=widget_base(title='Wizard', /col)

tab_steps=widget_tab(base)
intro=widget_base(tab_steps, title='Introduction', row=2, $
xsize=600,ysize=400)
text_base=widget_base(intro, /base_align_left, col=1)
t1='This wizard will help you set up stuff.'
l1=widget_label(text_base, value=t1)
;there's more labels, but who cares

sz=size(logo)
draw_base=widget_base(intro, /align_left, /base_align_bottom)
logo_win=widget_draw(draw_base, xsize=sz[2], $
ysize=sz[3],xoffset=0, yoffset=375-sz[3])

widget_control, base, /realize
widget_control, logo_win, get_value=win
wset, win
tvimage, logo, /keep_aspect_ratio


I don't see any black lines. I doubt if it is a TVImage thing. :-)

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")

braedley

Thanks for the tip.

For some reason, I had to set the TV keyword in order to get rid of
those lines.

david fanning

Braedley writes:


I suppose there could be a rounding error with some image
sizes, when you ask to keep the aspect ratio and you are
trying to put it into a window that is exactly the right
size. In this case a TV keyword without the KEEP_ASPECT
is probably the correct command anyway.

Cheers,

David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")