Francois Normandin

QUOTE (JasonD @ May 28 2003, 07:46 AM)

I've been wishing for a freehand sketchpad for the diagram view. Maybe also have the basic "draw tools" - text, squares, fills, lines, etc.

I'd love to be able to just look at the back panel, and circle a big chunk of code and then maybe have some explainitory text next to it.

It would have to be a layers thing, so you could click a button to hide or show.

yeah, that's what subvi's are for but still...

Some people use a one-frame Stacked Sequence Structure to wrap a piece of code and put some text. Not my favorite, but that could do the trick.

I'm not sure a free-hand sketchpad would increase readability of the block diagrams. But the draw tools might be useful I agree, although it's that sort of thing that might be nice to have, but how many times will you really need something like this? For the moment, decorations can be dropped on the front panel and copied to the diagram.

QUOTE (Paul_at_Lowell @ Sep 30 2008, 03:14 PM)

Does anyone know if it is possible to compare two versions of a class in a meaningful way?

...

I don't see a way to access the .ctls associated with the class for comparison either.

...

Has anyone figured out a way to do this?

Paul

Hi Paul,

I managed to retrieve the Class Private Data in variant form. If you use two versions of your lvclass, you will see the difference.

The actual values are those set by default in the class private data.

Download File:post-10515-1222830838.vi (LV 8.6)

QUOTE (raymyster @ Sep 26 2008, 03:13 PM)

i want to take these three arrays & put them in the database table lets say sensor_description this way:

field 1: sen_name field 2: sen_num field 3: sen_color

the problem is you can't combine an array of different data types

Hi Raymyster

You can combine different datatypes into a cluster and then make an array of that cluster.

QUOTE (raymyster @ Sep 26 2008, 03:13 PM)

I would suggest you take a look at the Type Sensitive Popup code from JDave in the Code Repository. You can use this tool to initialize a table with different kinds of datatypes. It's not exactly a plug-n-play solution for your problem, but it shows how you can achieve what you want by playing with Multicolum listbox properties.

QUOTE (TobyD @ Sep 26 2008, 03:35 PM)

EDIT: DOH! Re-DOH! Way too slow.

QUOTE (jaegen @ Sep 24 2008, 05:42 PM)

... must ... resist ... urge ... to ... feed ... troll ...

Jaegen

http://en.wikipedia.org/wiki/Internet_troll' rel='nofollow' target="_blank">Internet troll

I learn things everyday here!!! And not just LabVIEW. :thumbup:

QUOTE (schneidley @ Sep 23 2008, 04:35 PM)

sorry. i was not specific at all... i have tried DAQassistant and the tests in measurement & automation. there is no relay connected so far, but the eqiupment i plan to use is very low current. so far, i have tried to create signals and pick them up with a voltmeter and a scope. i can't see anything coming out. in DAQassistant, there aren't a lot of controls to play with on the digital side (i don't even see a place to change the voltage). i think i'm totally lost...

USB-6008 has two analog outputs (ao0 & ao1). In MAX, you can only set a DC value for the AO channels, while you can code it to change at a rate of 150Hz. If I'm correct, those are pins 14 & 15. You can check in MAX under "Device pinout" tab. If using an oscilloscope, make sure it's in DC coupling mode... otherwise you'll filter out the output.

Check out these two pages... 6008 & 6009 are the same except resolution and speed.

QUOTE (schneidley @ Sep 23 2008, 03:36 PM)

i'm trying to use labview to output a +3.3 and +5V DC signal for relay control. i can get the usb6008 to read signals, but it just seems to not want to output a signal. i've played with digital and analog output, and gotten nowhere. i think i'm just missing something stupid. can anyone give me a start on what i should be doing? thanks

~B.

Can you describe more your experimental setup? With the information at hand, it could be a number of problems... maybe your software works fine but you don't have enough current to latch the relay, or you might have a software problem?

1- I'd look in MAX in the test panel for device USB6008. If you can set it to 3.3V and measure it correctly with a voltmeter, then your device works and you know you are looking at the correct pin number...

2- In LabVIEW, try using the DAQ assistant to setup a simple AO code.

QUOTE (Mads @ Sep 22 2008, 10:18 AM)

The search could be made binary instead, that would cut the number of Nth line calls dramatically...

Indeed you're right. Thanks for the wiki-link.

John has suggested this a few posts above.

QUOTE (jlokanis @ Sep 22 2008, 02:32 AM)

QUOTE (Aristos Queue @ Sep 21 2008, 11:56 PM)

Get Nth Line is something I wrote to make various UI problems solvable. The problem is that it has to mimic the rendering of the text in the current font in order to figure out where word wrapping occurs. The font system is structured in the OS such that there's no way to do it except by actually rendering the font off screen (at least no other mechanism that I could puzzle out). As you observed, this means that for very large blocks of text, you'll have a slow down as if the entire file were drawn on a very large screen. Ugly.

So, you'll have to do this: Pick a font. Measure the width of every character in that font in pixels. Then do your own running calculations of where the word wrapping occurs. This should be very fast. It's something that Get Nth Line cannot do because it has to work with all possible fonts. Doing your own running calculation of the word wrapping will allow you to avoid the graphics rendering.

And now you know why word processors are such a pain to write and why so many end up so bloated and slow. And you know why MS Word was such an impressive app when it was released. It was able to track font runs very very quickly -- a seriously non-trivial problem, though it seems simple enough when you start on it.

Thanks for those insights... I had really no idea about that!

QUOTE (jlokanis @ Sep 22 2008, 02:32 AM)

Sure would be a nice snippet of code...

QUOTE (crelf @ Sep 19 2008, 07:57 PM)

Bugger it! I must be typing slow today

Maybe your svn is beginning to slow down your network after all... :laugh:

(Quoting myself...)

QUOTE (normandinf @ Sep 19 2008, 07:09 PM)

I tested the method a little tonight and I don't think it will be useful with large files as it seems very slow. It took a few seconds to scan a 591 lines string on my QuadCore! For long files, like help documents, it's gonna take a better scanning algorithm.

One trick is to use the method "Get Nth Line". Here's a quick example. (LV 8.6)

Download File:post-10515-1221865409.vi

One trick is to use the method "Get Nth Line". Here's a quick example. (LV 8.6)

Download File:post-10515-1221865409.vi

QUOTE (crelf @ Sep 19 2008, 03:00 PM)

You've got an advantage: you're closer to the phsycial LAVA server

Are you sure of that?

http://lavag.org/old_files/monthly_09_2008/post-10515-1221855818.png' target="_blank">

Depends where in Canada...

QUOTE (PJM_labview @ Sep 16 2008, 03:56 PM)

Ah, I search LAVA before I start this thread and I did not found this post

Yeah, I get that a lot too...

QUOTE (PJM_labview @ Sep 16 2008, 03:56 PM)

I tried it and it does not work in EXE. (If AQ says it, I'll believe him).

I wonder if you could load them dynamically at runtime, check their inheritance and then close them all? If that's possible in EXE, I bet it would be slow and not memory-effective but it would get you there... :2cents: It is not available either at runtime...

QUOTE (PJM_labview @ Sep 16 2008, 03:56 PM)

Well here it is. This is saved in LV86. I didn't include Norm's Tree Control API vis, neither the OpenG packages I used, to keep the llb small. I'm sure you don't need them , but if someone else does, please follow the links to get them as it makes too large a file to upload.

Download File:post-10515-1221609011.llb

QUOTE (PJM_labview @ Sep 15 2008, 05:09 PM)

I am more interesting in finding an answer about how to get the lvclass inheritance.

Have you looked at this post from Darren about Inheritance hierarchy? The VI is password-protected but should work at runtime.

I guess that's the output from LVClassPathFromInstance call you're looking for. I've used it to get the complete class hierarchy recursively. I don't have the result on my daytime computer, but could find it tonight. It's simply an implementation of Darren's VI with the tree control API from Norm the Captain.

QUOTE (eaolson @ Sep 15 2008, 11:37 AM)

Wave functions don't apply because people aren't waves. They don't diffract, interfere, have phase or group velocity.

Actually, they don't apply because of http://en.wikipedia.org/wiki/Decoherence#Loss_of_interference_and_the_transition_from_quantum_to_classical' rel='nofollow' target="_blank">decoherence. But we're talking the same thing here...

QUOTE (crelf @ Sep 14 2008, 01:03 PM)

:!: Spoiler Alert!

The final BattleStar Galactica Toaster http://dvice.com/archives/2008/08/dvice_tv_watch.php' rel='nofollow' target="_blank">revealed!

I can't!!!!

We've got presentation during lunch time of the second season of BSG on the conference screen starting today. Since it's as big as a cinema screen, I'll try to wait a until spring to see these spoilers or else I'll know of the 5th Cylon...

(Yes, second season... we started a little bit late!)

QUOTE (Graeme @ Sep 11 2008, 05:30 PM)

Hi all,

The attached VI and its comments say it all, but briefly, if you have an Enum constant wired to a Case Structure selector and the Case Structure has had "Add Case For Every Value" applied, then if you are commenting in a case for which the Enum constant is not set, then the comment does not behave properly (it only updates when you click outside of the comment).

Trivial in the greater scheme of things I know, but threw me a curved ball for a while. Responses welcome.

Regards, Graeme.

I can confirm that it doesn't work for me in 8.5 but it has been fixed in 8.6...

It's happening in 8.6 too.

We're at the limit of resolution of the algorithm. In DBL precision, this happens around 1E+14 or so.

I tried to wrap the Large EXT control to 0-2pi interval and I should have gotten the full EXT resolution (see pic)

Except that the division seems to be suffering from the same problem and it doesn't work. Since the sine and cosine are most probably calculated using some Taylor series (x^n/n! type of equation), we run into serious problems with 9E18^n/n!. I don't know which "n" is being computed, but if you compute until you converge, it could explain the algorithm becoming unstable.

QUOTE (Daklu @ Sep 9 2008, 03:14 PM)

Is there some special technique required to insert a class cube on a custom palette? I've tried several times but it doesn't seem to be working.

The Class Cube is a built-in function and I don't think you can access it. In the palette editor, when selecting "Display path to palette file...", you get a message saying it's built-in.

However, if you create a control and put the class cube in (type def or not), you can insert this wrapper control in any palette or save it to user.lib.

Have a look at this piece of coding.

Type Sensitive Popup

QUOTE (crelf @ Sep 8 2008, 12:33 PM)

Nope - I said "...the top ten countries by number of medals..." - Jamaica was 13th by number of gold and 20th by total number of medals.

Fair enough

QUOTE (crelf @ Sep 6 2008, 06:29 PM)

...and if you take the top ten countries by number of medals, prorata them by capita, Australia is #1 ! ! !

Okay, that's probably taking it a little too far

I don't want to spoil it, but I think Jamaica would win it for gold medal/capita ratio...

As I reviewed my configuration file, I noticed this key doesn't work on 8.6 anymore (works on 8.5):

SuperFunkyPrivateSpecialSecretForumStuff=LAVA

QUOTE (LV_FPGA_SE @ Aug 25 2008, 10:52 AM)

In the diagram you can open the Tools Palette just like on the front panel (View >> Tools Palette) and then select the coloring tool.

Obviously... :headbang:

Can I be excused by saying I never use the menus while in the block diagram???

I guess there's no way to add the brush to the tabbing sequence in the BD.

Good thing I read this AFTER my first week of vacation. I wouldn't have liked to have this picture in my mind:

http://lavag.org/old_files/monthly_09_2008/post-10515-1220323885.png' target="_blank">

BTW, since I was gone... which country won the olympics? (Shameless attempt to come back to the original topic)

QUOTE (Raymond Tsang @ Aug 24 2008, 06:12 PM)

Just to confirm... How do you check that there is no memory increase?

I simply monitored it in the Task Manager. It's not perfect because it monitors everything else along with LabView, but if you had a reference of some kind that was opened repeatedly and never closed, you'd have had an increase in system memory usage.

QUOTE (giopper @ Aug 23 2008, 10:18 PM)

I agree. And when writing to file, the file position will automatically be at the end of what you just wrote. Hence, no need to tell the file to go at the end, except if some other program could access this file at the same time and set position differently.