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Re: idl8 window size and arrow [message #84486 is a reply to message #84484]

Thu, 23 May 2013 10:14

Michael Galloy
Messages: 1114
Registered: April 2006

Senior Member

On 5/22/13 9:28 PM, laoli wrote:
> Many thanks Mike. Your explanation about different graphics is greatly helpful.
>
> 1) I added your line of code
> ar = arrow([50, 200], [50, 50], /device, head_size=3.)
> to my test script.
>
> 1a), the word "arrow" does not change color as other function names do.

I does not in the IDL 8.2.2 Workbench either. This looks like a bug in
the Workbench.

> 1b), when running it, an error message appeared:
> Unable to invoke method on NULL object reference: <OBJREF (<NullObject>)>.

I can't reproduce that error in the Workbench or from the command line
(the widget system used for function graphics is different in these cases).

> 1c), when commented out your line of code, and used the Annotate tools provided at the bottom of the graphic window, all other tools (such as Text, Oval) worked fine, but the Arrow tool caused an error message:
> Unable to locate target descriptor: MANIPULATORS/ANNOTATION/ARROW

I also couldn't get that to happen.

> 2) The window size is a problem on my machine:
> { x86_64 Win32 Windows Microsoft Windows 8.0.1 Oct 5 2010 64 64}

But I did have problems (depending on Workbench/command line):

a) From the Workbench, I could not get the window to be only 100
pixels tall. But at least coordinates seemed correct.

b) From the command line, the coordinate system is screwed up. The
window shows up as 100 pixels tall, but to get the arrow and text to
appear in the window, I had to position them at over 100 pixels (200
pixels appeared to be the center of the window, making the device
coordinates of the window start at 150 and go up to 250).

Here is the code I was using:

pro mg_arrow_test
w = window(window_title="My window", dimensions=[500, 100])
t = text(50, 220, "$\it draw arrow here$", /device)
ar = arrow([50, 200], fltarr(2) + 200., /device, head_size=3.)
end

Mike
--
Michael Galloy
www.michaelgalloy.com
Modern IDL: A Guide to IDL Programming (http://modernidl.idldev.com)
Research Mathematician
Tech-X Corporation

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[Message index]

		Re: idl8 window size and arrow By: lecacheux.alain on Fri, 24 May 2013 05:01
		Re: idl8 window size and arrow By: Haje Korth on Fri, 24 May 2013 04:20
		Re: idl8 window size and arrow By: David Fanning on Thu, 23 May 2013 19:23
		Re: idl8 window size and arrow By: laoli on Thu, 23 May 2013 18:35
		Re: idl8 window size and arrow By: Michael Galloy on Thu, 23 May 2013 10:14
		Re: idl8 window size and arrow By: laoli on Wed, 22 May 2013 20:32
		Re: idl8 window size and arrow By: Michael Galloy on Mon, 20 May 2013 09:29
		Re: idl8 window size and arrow By: Michael Galloy on Mon, 20 May 2013 09:28
		Re: idl8 window size and arrow By: laoli on Wed, 22 May 2013 20:28

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