Display control

Hey, I tried hooking up a lcd monitor to my ibook. I can't seem to get each monitor, the lcd on the ibook and the lcd panel to show a diiferent display. I don't know how to have two independant displays. I know ther is a button to take it out of mirror mode but it does not appear on my displays preference panel.

It was just discussed in an earlier thread, your iBook was originally designed to only work in mirrored mode, the PowerBooks will run in dual display mode.
As mentioned earlier, Screen Span Doctor, is something others have used to get the iBook to perform in dual display, I haven't used it myself but I'm sure you'll get some input from those that have.
Patrick

Similar Messages

Image display control scrolling does not work properly when zoomed in

I am using a ROI on an image in the image display control. When zooming into the image to fine-adjust the positioning of the ROI, the image scrolling does not work properly. As far as I understand, the image should scroll automatically when the ROI is leaving the visible area. However, the scrolling behaviour seems to depend on the origin of the Labview panel, not the origin of the image display control, which might require to move the ROI way out of the visible area before the scrolling takes place. In other words: the coordinate system of the image display control is shifted with respect to the true visible image area, depending on where you place it on the front panel. As a consequence, when clicking on a ROI which is in the visible area, but is outside of what Labview thinks is the visible area, it might immediately jump to the left border of the image, making the positioning of the ROI really difficult.
Has anyone noticed this behaviour, and what would be a reliable solution to avoid this?
Dirk

Hello,
no, I am not talking about the tools palette. Just place an image control with some image in it on a new VI front panel. Then, use the rectangle from the tools and select a ROI in the image. If you zoom in (using the magnification glass), and then grab the ROI and move it around, the image scroll with the ROI. So far, so good. If you now place the image control elsewhere on the panel, or add new control above it, resize the panel, etc. , this scrolling when moving the ROI will not work correctly if the origin (0,0) of the panel is far away from the image control.
I have attached a VI for simplicity (although there is hardly any code in it).
If you make a ROI and try to move it down, you will notice that scrolling starts if you move the mouse out to about 10cms below the image (depens on your screen, of course). After that, if you click on the ROI, the scroll bars and ROI might jump up to the upper end of the image. Imagine how annoying this is if you try to finely adjust the ROI position.
I think it is a bug in the implementation of the image display control.
Thanks,
Dirk
Attachments:
scrolling.vi ‏818 KB

Second display control & E-mail checking

Anyone got this feature to work. If I try to initiate mail checking from the start menu, all programs, second display control, mail checking after filling in the panel it fails with a "failed to connect" message. Can find no help info for this feature. Anyone tried it with any success?

Fair enough, then how do I close out that last E-Mail from being displayed, without closing out the program?

Imaq Display Control, zoom to fit disappeared at runtime.

Like in the title. The right-click menu is impossible to call at runtime in the Imaq Display control. This has happened after compiling the code.
Some idea why it is happen this?
Francesco.
Solved!
Go to Solution.

Thank you very much, this is exactly what i search for!
b.ploetzeneder ha scritto:
I have had this problem before.
The solution is not very pretty, but it can be found here: http://forums.ni.com/t5/LabVIEW/Missing-quot-Zoom-to-fit-quot-in-application-EXE-build/td-p/905681
Birgit

Using IMAQ Image Display control vs IMAQ WindDraw for large image files

Hello All;
I am designing an application that is currently using IMAQ Image Display control to view large images (5K x 3K and larger). My problem is that these images take 10-20 seconds to load and display, whereas if I use IMAQ WindDraw to display my image in a separate window, it only takes a couple of seconds. My application is designed such that I am making use of the Subpanels in LabVIEW 8.0, and to make it pleasant for the user, the interface is such that my line profile, histograph and image viewer displays are contained within the same GUI (panel).
I read the National Instruments application note regarding displaying of large images, and it did not seem to make a difference. For example, I switched the 'modern' IMAQ Image Display control with the classic Image Display control, since the 'classic' does not contain any of the 3D rendering tools which might slow the process down.
Why is there such a huge difference in loading times if I am trying to do exactly the same thing with both methods? How can I bring the IMAQ Image Display control up to the same speed as the IMAQ WindDraw tool?
I am currently using LabVIEW 8.0 with the latest IMAQ/NI Vision package from NI (IMAQ v7.1?). Thanks.
DJH

Use a property node and select 16 bit image mapping. You can create a control for this or whatever you need. If you select the individual elements, you can get enumerated controls.
Bruce
Bruce Ammons
Ammons Engineering

Any way for one VI to dynamically update images shown in another VI's Image Display control?

I've just discovered (in LV v7.0) that, while I can wire to it, I cannot write image data to a "value" input terminal of a property node associated with an Image Display. When the VI runs I get this error:
"IMAQ Vision: (Hex 0xBFF6051A) The Image Display control does not support writing this property node."
(I must admit that I have to wonder why we are allowed to wire to it, if all it does is generate this error)
Is there any way for one VI to dynamically update images shown in another VI's Image Display control?
I am not interested in using IMAQWindDraw windows.

OK, I have found one way to simultaneously access one VI's image data within another VI without the use of globals. I don't know if it makes use of a known feature of image data that will be with us forever or if it is a bug that will disappear sometime in the future...
It seems that if I create an image data stream in one VI using IMAQ CREATE and name the data stream "ABC" and then create an image data stream in another VI using IMAQ CREATE and also name that data stream "ABC" then in fact they are both the same data streams and they can be read or written by either VI.
Using this feature I can write the common data stream in one VI and using a shared occurrence or semaphore let the other VI know when it is OK to display the data from the common stream.
This method requires that the displaying VI needs to have a while loop around the image display which is not nearly as simple as a display that is updated automagically by another VI writing to a VALUE input that is referenced back to the Image Display. I'd still like to know if there is some way to make that work.
One corollary to this is that if you have several image data streams in use in a system (they can be in totally separate VI's, running independently) and you don't want them tromping on each other's image data then you need to make sure that they (the image data streams) get created with different names. An example of a place where this might bite you (and where I discovered this "feature") is to have multiple copies of the same VI with different names to do image acquisition and display from multiple cameras. Being copies of the same VI, they all had the same image data stream names, defined as constants, within them. When they were run simultaneously, the image data from all of the multiple cameras randomly appeared in all of the image displays. I don't know if this feature would hold up if the separate VI's were turned into separate executables and then run. Do any of you know if this sharing of image data streams with common names works across executables running on the same machine?

DSC 8.01 Configuring alarm and event display control

Hi all,
How to configure the columns in this control (alarm and event display control) in order to hide columns, changing the langage ?
In the previous DSC version it was different.
Thanks
Best regards,
Julien

Hello Julien,
At my knowledge, such a control is not customisable. I think you should use the "Alarm and query filter" control (in your FP) linked to the filter input of the "Alarm and query" vi (in your diagram). This should enable you to select the alarms to display
Regards,
Mathieu Steiner, Test System Engineer, Safran Engineering
CLD, ISTQB

Imaq Image Display Control - Zoom tool - zoom factor changes slowly

Hi at all,
we have a strange behavior with the zoom factor of the Image Display Control in an Labview executable.
Ususally by clicking into the image with the zoom tool activated, the zoom factor changes from 1,2,4,8,16, ... ("x2")
Now we have one PC, where it changes from 1,2,3,4,5,... ("+1")
Has anyone an idea on which windows setting this behavior depends on? The PC runs with Windows XP SP3, the LV-Exe was built
with LabVIEW 8.5.1 and the Vision Development Module 8.5.0. Is there any regsitry setting where I can adjust the "click intensity" or
something like that? Or can I set a property of the image control to force a specific behavior?
Actually I have never seen this behavior before, I only know the half/double mode.
In the software the operator has to search for fiducials on PCBs what means he has to click several times into the image.
Changing in the Mode "+1" instead of "x2" is not acceptable for him.
Thanks for your help!
Stefan

Hello Stefan,
thank you for posting at the National Instruments forum. The "Zoom Behaviour" was changed due to customer requests. I totally agree with you, that it is not the best solution to click 24-times to get the desired region of interest.
I created a small example for LabVIEW 2010, which uses a property node and event structure, to perform the zoom programmatically.
Best regards
MarianO
Attachments:
Calculate Zoomfactor.vi ‏21 KB
Image Example.vi ‏63 KB

Flash Video Play Does NOT Display Controls

I am using Flash Pro 8 - putting FLV files in SWF files using
Flash Pro 8 and then "publishing" to Html and SWF to a location on
my hard drive.
When I display the webpage from my Hard Drive from where ever
on my hard drive I initially published to from Flash 8 Pro -
everything works fine - videos play and video control bar shows and
works.
When I publish this website to web server the video displays
and plays but NO Video Controller Bar (at bottom of the video)
shows at all.
Symptom: when I make an Html, SWF and FLA file into a folder
on my hard drive and display them in the browser the video control
bar shows. When I copy those three files into the hard drive
website in FrontPage, the video shows but the video control bar
does not.
So, I re-made the Html, SWF, and FLA files and put them
directly into the FrontPage website (on my hard drive) then
everything works fine when I use broswer (IE 6 or Firefox). z
But, when I publish the hard drive website to the remote
website hosting company, the video control bar disappears -
everything else works fine (video shows OK just no video controller
bar.)
My guess is that the SWF file has a non-relative URL
reference concerning the video control bar and when the three files
(Html, SWF and FLA) are moved to new location then that
non-relative address rears its head.
I should NOT publish from Flash 8 Pro directly to remote
webserver as it has FrontPage Extensions and does not like to talk
to FTP changes to website not coming from FrontPage client.
is my guess right? What to do?????
[email protected]

Did you upload the skin swf file to your server also? That is
a common missed step.

Canvas not displaying controls added with addChild

I have a custom class holding some information, a property in
the class is an XML string and another method parses the XML add
creates controls (labels and buttons) based on the xml. I also have
a variable named renderer which is a mx.containers.Canvas. After
the XML is loaded and the controls are added using
Canvas.addChild() I add the Canvas to my stage. The problem I'm
running into is that even though the Canvas is added to the stage,
I cannot see any of the controls inside of the canvas. Doing a
trace(Canvas.numChildren()); I can see that I have added 101
children to my canvas container (which is what my xml file shows)
however they will not display. I know the canvas has been added to
the stage because I can see the scroll bars when i set the policies
to "on" and it even sets the scroll bars correctly if the
components are too big for the canvas and would have to be scrolled
down to see them all, it just doesn't show any of the components.
Anyone run into a similar issue?

Did you set an explicit width and height (or percentWidth and
percentHeight, or styles top, left, top, bottom) on the controls
you create? By default controls have 0x0 size. Creating controls in
MXML causes additional code to be generated which gives the
controls default sizes, but it won't happen in your own
ActionScript code.

Flash Player not displaying control bar: pause, stop, full screen, etc

How do I change settings to allow the control bar to appear?
Thanks.

Controls are in the "interface" embedded into the pages containing the Flash content. Flash Player doesn't "create them". It displays them based on the code received from the page. If there's a problem with the page code, or the browser isn't reading the code properly, the controls may not display.
Basically, you can't fix the web page from the player.
Does this happen with ANY videos or just certain sites or a specific saite?

HELP!!! Using LabView to display/control Mitsubishi FX series PLCs

Hello,
I am a LabView novice and have some questions around using LabView to control and display information from several laboratory instrumentation with a Mitsubishi FX series PLC. The communication protocol for the PLC is Profibus. What LabView modules/products do I need? Will I be using the OPC server and client to communicate to the PLC? Will I be using the device drivers? Is the device drivers the same as the OPC server. Will I need a profibus network card in the PC for Labview to communicate to the PLCs. Once again, I am a novice so please be patience if I ask more questions to understand your response.

Hi,
The following thread seems to address a similar query:
http://forums.ni.com/ni/board/message?board.id=170&message.id=27248&requireLogin=False
To answer some of your other questions:
1. You'll be communicating with the Mitsubishi hardware using an OPC server.
2. This isn't the same as the device drivers, though it could be included with the device drivers you got from Mitsubishi, you would have to check that with them.
3. I don't know if you need a profibus network card in your machine, again, you'd have to check that with Mitsubishi
NI do provide OPC software but I'm not sure if your device is supported. Check if it's listed in the following supported device list. If not you should be able to get an OPC server from Mitsubishi. According to the thread linked above they have one that's compatible with LabVIEW.
The software NI provides that can communicate with OPC servers is called the Data Logging and Supervisory Control Module. What LabVIEW software do you currently have?
I would advise that you contact Mitsubishi to make sure you have all the necessary hardware first. Also, ask them about the OPC server software. Then you can work on controlling the PLCs with LabVIEW.
I hope this clarifies things but if not, post some more questions.
Regards,
Sarah
Applications Engineer | National Instruments | UK & Ireland

IMAQ WindDisplayMapping...for Vision Image Display Control?

The IMAQ WindDisplayMapping operates on an IMAQ window display. Is there an equivalent fx that will operate on the Vision Image Display Indicator that can be placed on LabVIEW front panel? (Or do I need to code up the equivalent fx?)
Thanks,
Don

Use a property node and select 16 bit image mapping. You can create a control for this or whatever you need. If you select the individual elements, you can get enumerated controls.
Bruce
Bruce Ammons
Ammons Engineering

Thin Client Easy Shell - Display Control - Security Issue

We're expirementing with the Easy Shell software. It appears that when you enable the 'Display' option for settings (to allow users to alter resolution settings), the user can use the Address Bar to navigate to other Control Panel items or directly to a file system location (and then execute other programs). This doesn't occur for other Control Panel applets that don't have an Explorer Address Bar (such as sound). Obviously one can still try to restrict the hell out of Windows Explorer to provide a defense to this, but a selling point of Easy Shell is sandboxing the user without needing to do a million different other configurations. Has anyone come accross this and come up with a method to secure the Address Bar?

1. Log on to the Thin Client as an Administrator 2. Make sure you disable the EWF which is available in the System tray towards right bottom corner 3. Go to the contol panel of the Thin Client and look for Region and Language 4. Please set the language to French under "Region and Language" 5. Make sure you do all the changes [For Example: Giving access to the User for specific applications...] 6. Please re-install the HP Easy Shell Software and choose the language as French if you get a language prompt 7. Now please launch the HP Easy Shell Software in the Administrator Login itself and turn on the Region & Language 8. Restart the Thin Client and login as a User to check if this is what you are looking for If not please let me know if there is anything specific you are looking for, so I can further research with this regard Hope this helps, for any further queries reply to the post and feel free to join us again **Click the White Thumbs Up Button on the right to say Thanks**Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem. Thank You,K N R KSenior Thin Client Technician - North America Support Although I am an HP employee, I am speaking for myself and not for HP

Window XP Tablet PC Display Control - Brightness

I am developing an application for Microsoft Windows XP Tablet PC Edition. It will be used in both normal and total darkness environments alternatively. In order not to destroy user's night vision when user switch room condition, I need a to quick way to adjust display brightness. Since the target machine model like most tablet PCs doesn't have a hardware brightness control, I need a one-button control to switch display brightness. Can anyone advise how this can be achieved?
Thanks

Well, what is the point of this in your app? This will be an issue, presumably, for any application. If this is an issue, how is that the OS doesn't have a means to do this? And if there were a light sensor to detect room brightness to adjust the display automatically (I've no idea, but it's not impossible), it'd be a moot point anyway (the user should configure that).
To do it, you need to use JNI, most likely, to call native APIs for this, which means you need to go to MS website and look up what the API calls are. This is Windows programming stuff, not Java. Java's not going to provide some way for brightness control.

HT3131 Why doesn't Apple mention using the Display control panel's "Arrange" feature to move the menu from the Macbook's display to the EXTERNAL display? THAT'S the real answer to make Clamshell mode work, but it's not mentioned in any Apple documentation

After a recent OS update, Clamshell mode quit working. I couldn't find any Apple documentation
that would help. So many people were stabbing around in the dark, until I finally found the following information
that is lacking from any Apple documentation that I've been able to find.
Here's what I found to be the most helpful:
Forcing a MacBook to use the External Monitor:
I tried about everything: Rebooting, switching off completely, removing and inserting the Thunderbolt->HDMI adapter etc.
The only thing that finally worked was the following:
1. Take it out of the dock and connect to Power and HDMI to the TV.
Shut down the Mac. Turn it on and close the lid. It will now boot up on the external screen.
Log onto the Mac, and put it in sleep mode (Option-Command-Eject).
Put it back into the dock and wake it up with the spacebar.
It should be OK now... until the next update...
Note: One indication that you’re going to have extreme trouble with this is when (occasionally and without reason) the Mirroring Options icon shows up on the top icon bar.
Other useful commands:
“Command + F1” puts PC in Two-Screen MIRROR mode.
If it’s REALLY being stubborn, do the following (Clamshell Must be open
to see the arrangement tab.):
In System Preferences > Display on the MacBook screen there should be an Arrangement tab when you have the MacBook hooked up to the TV and both screens working. When you click the Arrangement tab do you see two monitors side by side? One of them will have a Menu Bar at the top. Just click on the Menu Bar and drag it to the second monitor (Yes, I know, it’s hard to grab ahold of it...) That will make your EXTERNAL monitor your main screen.
You can now use your MacBook in Clamshell Mode with a wired or Bluetooth keyboard and mouse. http://support.apple.com/kb/HT3131 When you disconnect from the TV, make sure it’s asleep (Option+Command+Eject buttons) or your Menu Bar will automatically change back to the MacBook.

After a recent OS update, Clamshell mode quit working. I couldn't find any Apple documentation
that would help. So many people were stabbing around in the dark, until I finally found the following information
that is lacking from any Apple documentation that I've been able to find.
Here's what I found to be the most helpful:
Forcing a MacBook to use the External Monitor:
I tried about everything: Rebooting, switching off completely, removing and inserting the Thunderbolt->HDMI adapter etc.
The only thing that finally worked was the following:
1. Take it out of the dock and connect to Power and HDMI to the TV.
Shut down the Mac. Turn it on and close the lid. It will now boot up on the external screen.
Log onto the Mac, and put it in sleep mode (Option-Command-Eject).
Put it back into the dock and wake it up with the spacebar.
It should be OK now... until the next update...
Note: One indication that you’re going to have extreme trouble with this is when (occasionally and without reason) the Mirroring Options icon shows up on the top icon bar.
Other useful commands:
“Command + F1” puts PC in Two-Screen MIRROR mode.
If it’s REALLY being stubborn, do the following (Clamshell Must be open
to see the arrangement tab.):
In System Preferences > Display on the MacBook screen there should be an Arrangement tab when you have the MacBook hooked up to the TV and both screens working. When you click the Arrangement tab do you see two monitors side by side? One of them will have a Menu Bar at the top. Just click on the Menu Bar and drag it to the second monitor (Yes, I know, it’s hard to grab ahold of it...) That will make your EXTERNAL monitor your main screen.
You can now use your MacBook in Clamshell Mode with a wired or Bluetooth keyboard and mouse. http://support.apple.com/kb/HT3131 When you disconnect from the TV, make sure it’s asleep (Option+Command+Eject buttons) or your Menu Bar will automatically change back to the MacBook.

Display control

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