Leaderboard

Yesterday I was giving a presentation titled Software Development with LabVIEW Object-Oriented Programming at NIDays in Finland. As part of the talk, I prepared Drawing Tool, an example application that utilizes LabVIEW Object-Oriented Programming and tries to introduce several LabVIEW Object-Oriented Programming techniques. It is a simple drawing application for drawing various shapes of different colors on a drawing area. The application is based on a state-machine where the state of the application is presented with several LabVIEW objects. The application demonstrates how a simple state machines based application can be created using LabVIEW classes as state parameters. ALERT: The intention of the application is to show various LVOOP features and programming techniques. To make the application easily understandable to LVOOP beginners, I used architectural choices that make the application more readable rather than more sophisticated and easier to extend. So the example application is not intended as a guide how to develop LVOOP application but merely as an example introducing how several LVOOP techniques can be used in application development. Download Drawing Tool Download the NIDays presentation slides

I am sure that a lot of you already knew what the "add property" button does in the installer build specification, but I am so happy about this discovery and I couldn't find anything online that I decided to share my excitement with my friends in LAVA. The application I am building works with a third party software that requires my installer to add things to the %appdata% folder, in Windows 8 this translates to C:Users<username>AppDataRoaming The default destinations available in the installer build specification in LabVIEW includes the [Public App Data] but in Windows 8 that points to C:ProgramData The help says that clicking on the Add property button under the Destination View lets you add a new MSI property to the Destination View tree. You can find a list of MSI properties here: http://msdn.microsoft.com/en-us/library/aa370905.aspx#component_location_properties and in particular there is one called AppDataFolder http://msdn.microsoft.com/en-us/library/aa367565(v=vs.85).aspx Well, adding the new property AppDataFolder was enough to set the destination for my ThirdPartyApp and the installer now successfully installs files in %appdata% folder. I hope this helps others in search of this information. Regards, Fab

I gave a talk at the recent CLD Summit in the UK where I explain the issue. It is a public video on the CSLUG youtube channel.

In theory my solution should be able to do that. It was certainly designed with that feature in mind - I just haven't tried it yet As long as the front panel is running somewhere and visible it can be interacted with. In fact, my plan was to have a navigation menu inserted into every html page to allow the user to navigate between all available front panels without having to type in a new URL or make an awkward link on the actual front panels. Unfortunately, all that only exists in my head...

Wow, that freeboard.io page is pretty sweet. I played around with it and made something simple using the CVT, might post a little tutorial for interested parties if I have time. I like that it just takes a json blob and then lets you display it. The only downside I can see (vs something like data dashboard) is you don't seem to have the ability to set values using it. Its probably not too hard to add some js to send value change events, but it'd be cool if it were baked in. Also, if anyone ever uses their own web server like apache or nginx or whatever, and have found that its annoyingly painful to use, I found a shiny new alternative: https://caddyserver.com/ Basically everything in the folder with the exe will be served up by default, and then you can put in a "caddyfile" which has additional instructions. For example if you wanted to host freeboard using the main server and forward requests to /lv to a labview web service called "myWebService", you'd put this one single line in the file: "proxy /lv localhost:8081/myWebService"

HDF5 seems conspicuously absent from the discussions and comparison charts.

QUOTE (Aristos Queue @ May 8 2008, 04:20 PM) My general principle is that my presentation material cannot be copy-pasted to a presentation of someone else. However, under certain circumstances I can allow using my presentation material; when a clear attribution to expressionflow.com is used when the material is presented, I can consider allowing the usage of the material. However, this should be agreed with me as by-case basis. EDIT: If you are interested in aquiring the right to use the material in NI presentations, you should contact me directly. Tomi