Multi Slider Slide control is sucking cpu cycles

Here is a control (see attachment) that just by it's very presence on a front panel sucks 25% cpu on my machine. It appears to be the 3 slider slide that is causing the problem. I find that I can replace the control (it starts as a Silver Horizontal Point Slide) and it settles down until the next time the vi is loaded into memory again. Anybody seen this before? FYI - I created this control so that it appears as a cluster datatype with 3 numerics, the first being the visible slider which is the current value, the second numeric being the lower limit and the third numeric being the upper limit.

25% is one core on a 4 core machine. Does that sound about right?
Why is the control so much larger than needed and why is the scale visible, but hidden underneath the cluster boundary?
In any case, I see 100% use on one core after loading your VI (LabVIEW 2015), but as soon as I slighly move one of the green sliders, the CPU drops to zero. Something seems in a weird state initially. Hard to tell...

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Dynamic Update in real time with slider control

We have requirements to display complex data in a graphical format. So far this has gone well by leveraging ADF and DVT components (dvt:Map, dvt:gauge, dvt:bargraph, af:tables, af:inputNumberSlider, etc.); however, we recently have been asked to add real-time animation of these controls over time. In brief, the user requires the ability to control the on-screen visualization of data by sliding the control on an af:inputNumberSlider (or equivalent) that represents a multi-month time scale. While sliding this control, the user expects to see the data visualization controls dynamically update in real time, keeping up with the rate at which the user moves the slider control. Think of this like a flip book animation where the slider controls the page the user is looking at and they can flip through the pages forwards or backwards at any desired speed. The time slider increments are one hour.
Our current application architecture:
Oracle ADF Fusion Web Application (v 11.1.1.5)
EJB 3.0
Eclipselink
Oracle 11g
Any kind of help is highly appreciated.
Thanks,
Mehabub

Hi,
the af:inputNumberSlider does not provide this functionality. Your alternative is a custom component (or any component that raises a client JS event) and call an af:serverListener in a custom event to send the notification to the server.
Frank

Multi-Slide Synchronized .f4v videos looping 3 times on mobile device

I created an elearning project in captivate 8.01 which includes several slides with .f4v videos as multi-slide synchronized videos. Each of these videos spans only one slide. I published this course to our LMS (Cornerstone OnDemand Learning Cloud) in HTML5 and SWF to accommodate desktop and mobile learners. I used the SCORM 2004 1.3 standard. The project plays as expected on a desktop PC, progressing from slide to slide after each video is played (note I tried this both with HTML5 and SWF output, and it worked fine on the desktop). However, when viewing this course on a mobile device (my tablet is an Android 4.4.2), each of the slides with a video loops three times before progressing to the next slide. I tried putting the slide action "On Exit: Go to next slide" on these slides with videos to force the project to progress, but with no success. How can I ensure that these videos play only once then progress to the next slide on a mobile device?

No controllers showing here either. Controllers show and work in preview mode, but when publishing to Html5 then playing on Ipad, video in slide plays once, but now controls visible...can't pause. stop or rewind...
Dave

Captivate 7 multi-slide video not working on Android

Hello Adobe staff,
still needing help with this one from my previous question "Captivate 7 event video playback controls not working."
The question has now narrowed down to:
How can I make a multi-slide mp4 video in HTML5 format work on Androids? It works fine on iPad and computer, but Androids will not playback the video, only the audio.
Thanks,
Nat

Not all Android versions or Android browsers support MP4.
I suggest you take a look at this page to see which versions do or don't.
http://developer.android.com/guide/appendix/media-formats.html
If your Android version or browser doesn't support MP4, there's not a lot you can do other than upgrade.

Multi-Slide Synchronized Video Working in SWF - but not HTML5

We have a module that has 8 slides that contain Multi-Slide Synchronized Videos, each of which are contained on 1 slide (as seen in the screen shot.)
When we publish the project, the swf version works fine. However, the first html5 video shows up, then none of the others do.
We first tried inserting the video as an "Event Video" but when we tried that, in html5 there were no controllers at all for the in-slide video. This breaks our spec because the client needs cross browser and mobile device combatability.
Any clues as to why the video isn't even appearing after the first slide in html5?

No controllers showing here either. Controllers show and work in preview mode, but when publishing to Html5 then playing on Ipad, video in slide plays once, but now controls visible...can't pause. stop or rewind...
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Intensive slider control use may lead to LabVIEW hang and system instability when coupled to event loop "Value Change"

Occasionally, over the past year or two, I have noticed on different machines and versions of LabVIEW (8.0 and 8.5) that intensive operation of the LabVIEW slider control (holding down the left mouse button and shaking the mouse quickly back and forth to move the slider for several seconds) may cause LabVIEW to hang with high CPU usage (50% on my current test machine, which has a Pentium IV "hyperthreaded" processor, so 50% is the max that a single thread can take up). In some instances, after the LabVIEW process is forced to quit, the system itself becomes unstable (more high CPU usage) or hangs, up to and including the need for a hard restart. I have seen this behavior both when handling slider change events the "old fashioned" way with a while loop and a case structure; and also when using a while loop with an event structure handling the "Value Change" event for the slider.
Attached is an .rtf file dump of the front panel and block diagram of a simple test VI that replicates this problem in my hands (using an event structure). The loop count runs to at least several hundred iterations before the crash occurs.
At least for the "old fashioned" loop handling method, adding a forced wait of a few dozen msec per loop didn't seem to be a workaround. I haven't tried this idea with the event structure, but don't expect joy to follow. The possibility of a system hang discourages aggressive experimentation.
Is this a known issue? Can anyone else replicate it (carefully)? In any case, I'd welcome other suggestions for workarounds.
Thanks,
Darin Nelson
Attachments:
Hang Slider.rtf ‏683 KB

Thanks for all your responses, and especially to those who are waggling their mice around trying to reproduce this. I'll respond to (most aspects of) the last several posts in one message.
LabViewGuruWannabe:
I'll see if I can get the original code to post in a separate message, I posted the .rtf originally because I thought there might be filtering on forum posts (I'm sort of new here). But I doubt you re-created it wrong.
The "more modern" test hardware was an Intel Core2 , 2.4 GHz, 2Gb RAM, on an Intel 965 family motherboard. As I said, it took me two tries to trigger the error on this hardware; in the case where it triggered, I was at almost 12000 iterations before things went south. 10000 iterations, therefore, might not be enough--or you might never get it, for all I know. My Pentium 4 Hyperthreaded machine (3.2 GHz, 2 Gb RAM) triggers the hang much more easily (always within 2500 iterations, usually within 1000), so there seems to be some hardware dependence here. Maybe the workaround is just to use hardware recent enough that no one not under the influence of strange compulsions will accidentally trigger the hang.
TonP:
After reading your suggestion, I tried something even more radical -- getting rid of the handling code altogether. I took the slider node out of the while loop, and removed all code inside the "Slide" case of the event structure.
On my Pentium 4 machine, the hang triggered after 677 iterations.
Brian Beal:

Huh, I never even noticed that checkbox existed. Anyway, yes, I
kept the default to lock out the front panel while the event process. If I
disable it… I still get the hang.
Message Edited by dman on 02-04-2008 06:36 AM

Does Captivate 7/8 support *Dynamic* Streaming Video for synchronized Multi-Slide videos?

I'm experimenting with inserting Streaming Video into Captivate Lessons. I've set up an Adobe Media Server (AMS) to stream the video.
When inserting Multi-Slide Synchronized video, it's not clear whether/how I can insert a Dynamic Streaming Video link in a synchronized Multi-Slide Video.
(The Dynamic videos can switch between videos of varying quality based on the user's available bandwidth.)
I think you're supposed use a URL that points to a manifest file (.F4M), which catalogs the videos of varying bitrates. However, I can't seem to get it to work in Captivate and Adobe is a little vague on how/if one references the manifest file. (i.e. I can't find any examples.)
So, does Captivate support dynamic streaming video?
If not, which is more robust in Captivate? HTTP progressive download or regular (non-Dynamic) RTMP Streaming Video?

Thanks Erik.
We did some more tests/checking-around and have convinced ourselves that the URL needs to point to the manifest file in order for Dynamic Media Streaming to work.
When we examined the Adobe Media Server sample web page (below), we found buttons to select different media sources.
The 'Multiple Bitrate' button under RTMP Dynamic Streaming Sample is mapped to the URL of an F4M (manifest) file.
The 'Single Bitrate' button is mapped to an individual mp4 file.
We also found more clues in the FlowPlayer RTMP F4M page.
Also, I'm guessing that Captivate can't handle adaptive bitrate streaming from non-RTMP sources based on the menu options. (See screen capture below)
If the menu above is correct, the first choice is the opposite of streaming media, because it says 'Progressive Download'. (Progressive download caches the video file on the client machine.)
The next one is for private Adobe Media Streaming and the third is for 3rd-party Adobe Media Streaming services.
So, I'm pretty much convinced that it's not supported.

How to change slider control digital display precision from program

I want to change slider control digital display precision from my Labview 2013 program. I can not find property that changes slider digital display format.
Solved!
Go to Solution.

rt clk the digital display>create>property node>format string
you could also do the slide scale, if needed...
from the front panel:rt clk properties>goto display format tab>goto drop down list and pick "digital display 0" and format

The volume slide control on my 4s has disappeared when I watch videos and listen to music. Any suggestion on how to get it back? I've tried the recommendations in the manual

The volume slide control on my iPhone 4S has disappeared when I play videos, music and YouTube. I've tried the recommendations in manual, to no avail. Any suggestions?

Your phone still thinks it is plugged into the stereo. I don't remember how to solve this but perhaps you can search through the forum or maybe one of the members here will jump in on how to switch the playback to speakers.

Can a slide control have a range of 180 to 0 to 180?

I've got a slide control and I want its range to be 180 to 0 to 180. No negative numbers are displayed or shown in the data. This is how a aircraft cockpit roll indicator is marked as well as some other gages. Electricaly the indicator is like this:
0 volts equals 180 degrees roll to the left,
5 volts is 0 degrees,
and 10 volts equals 180 degrees roll to the right.
Can slide controls work this way? I would of thought there would be some sample code or something for aircraft cockpit gages but my searchs have been nill. Thanks for any help.

You should be able to modify the control slider to do that. The value would output 0 to 10 as you indicte for voltage but change the slider control to not display the numeric values with the ticks. The use free text to lable the tick marks. I don't know if you can actualy have the control equal to the same value in two different slider postions, but if you need to have 180 to 0 to 180, make the range have negative values and convert them to positive values in code. You will still have to not show the slider values and use free text.
Message Edited by paulmw on 11-14-2006 11:25 AM
Attachments:
slider.JPG ‏7 KB

Pie chart in combintion with a Slider control in Dashboards 4.0

Hi,
Following the my requirement for creating a dashboard.
1) i have to display employee count for different regions in a pie char for a particular month.
2) This month needs to be selected from a slider control(Horizontal).
3) The slider control needs to show Month and year (MON-YYYY format) for the last 13 months.6 months above the slider and 7 months below the slider.
4) So when a user selects a particular month by dragging to the particular month in slider, then the pie chart should display employee count for the selected month.
5) And Also the slider control by default should show last month employee count in pie chart when the dashboard is opened every time.
So Any body knows how to implement this requirement please send me the solution in a step by step approch.
Thanks in Advance,
Regards,
Nanda Kishore.

Hi,
Set up your data like this
For the months we just use 0 for the selected month and we mark our min & max.
(I just took a few months, just as test, in real, you have to have all your months, off course)
Link the slider component, data to B2, min to B3 and max to B7
Create combobox, link labels to cell B3:B7
setup of data insertion, see screenshot below. (destination: j4:J7)
for behaviour column do as follows...
Your pie chart component
results in
now you have to put some makup on your dashboard, (hide the combobox - hide the values -6,0and 7), create some textcomponents to show the correct months (create a key row (-6 >0>7) and a month-text row), you can use vlookup or via a combobox to fetch the correct month-text
Have fun with it

Programatically Accessing the Increment & Decrement of a Slide Control.

Does anyone know if its possible to change the Increment and/or Decrement buttons in a Slide control? I know I can do this through the property pages but I can't find a method or property in the CNiImage class to gain access to these "buttons".
Basically I have a 3D Horizontal Fill Slide and want to make the rounded ends flash when the value is under or over range and I can't find a way of doing it.

Take a look at the CNiSlide::Images method. The documentation describes how you can access a CNiImage that corresponds to parts of the slide, including the increment and decrement buttons. Once you have the CNiImage for the buttons, you can configure the animation, blinking, etc. For example:
CNiImage image = m_slide.Images(_T("Increment Button"));
image.BlinkInterval = CNiImage::SpeedVeryFast;
- Elton

Tiled vi pane backgrounds can cause slow slider control updating

In diagnosing a slow responding slider control I found that the problem was having selected a Pane background image that was set to Brushed Metal and Tiled.
It turns out that it was the tiled setting that caused the slowdown (which was very pronounced). It may not be commonly known, but if you right click on a vi pane scroll bar you
have a right click menu that has the option of setting the background image jpg.

Hmm, yes, it's actually pretty noticeable even all you have on the front panel is a slide control (you can see the slider trailing the mouse pointer when you move it up and down). It also seems to be specific to the metal brushed theme and doesn't happen when other backgrounds are tiled...
Let me do some more testing here...
Misha

I would like to create a pop-up window appear from Labview Interface. In this window, I will have a slide control and an image taken from a camera. The main VI have to run while pop-up window is open. How can I do ?

When I pushed a button, this pop-up window has to appear. There will be a slide control and a picture from a camera in this window. Is it possible to make appear this windows while main VI Interface continue to run ? How can I do this ? Thank you for your answers.
Cyril.

Here you go. This is simple example. Maybe not the best way, I am just
beginner in LV and still not comfortable with data flow that much. I prefer
events, so I would change this to use Event Structures.
When you click on OK button on SliderMain, it opens Slider.vi. Now both
windows are open and you can interact with both. Now if you click on OK
again with Slider.vi open, you run into problems. Only thing I did was
change VI properties of slider.vi, mainly window appearance.
vishi
"Cy" wrote in message
news:[email protected]..
> I would like to create a pop-up window appear from Labview Interface.
> In this window, I will have a slide control and an image taken from a
> camera. The main VI hav
e to run while pop-up window is open. How can I
> do ?
>
> When I pushed a button, this pop-up window has to appear. There will
> be a slide control and a picture from a camera in this window. Is it
> possible to make appear this windows while main VI Interface continue
> to run ? How can I do this ? Thank you for your answers.
> Cyril.
[Attachment SliderMain.vi, see below]
[Attachment Slider.vi, see below]
Attachments:
SliderMain.vi ‏16 KB
Slider.vi ‏11 KB

Changing Slide Control Scale Range

I am creating a program that will allow the user to select a range of time over which data will be analyzed. Is there a way to set the slide control range to start at the beginning of the data set (t0) and go to the time at the end (tf)? I can change the values using a property node, but the values are for the start and stop and increments are doubles.
Thanks.
--Robert

Change the format for the digital display. The tip strip will be formatted the same as the digital display.
So far, you have only changed the scale format.
Message Edited by altenbach on 06-19-2008 06:21 PM
LabVIEW Champion . Do more with less code and in less time .
Attachments:
TipFormat.png ‏46 KB

Multi Slider Slide control is sucking cpu cycles

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