Xy graph cursor issue

Hi,
I am having a weird issue with cursors on XY Graph. I am unable to grab the cursor and even when I manually put the X value in the cursor legend, the cursor sometime go to go to that X value. And the issue is very intermittent. The cursors work sometimes without any issue and sometimes I just cant grab and move them.
I have attached the vi here that I am having an issue with. Could anyone take a look at it and let me know if you are also having the same issue as me. See if you are able to move the cursors, snap cursor to different plots and still able to move the cursors.
Thanks,
LVCoder
Solved!
Go to Solution.
Attachments:
XYGraphCursorIssue.vi ‏50 KB

It looks like you're trying to make the third cursor on the list show the delta between the second and the first, right? i.e. Delta = Cursor1 - Cursor0
If this is what you want, change the ActCrsr index value on the second property node to a value of "2". It is currently "1".
This will set the Delta cursor to the be difference values that are calculated.
What's happening right now is you're subtracting Cursor0 from Cursor1 and then assigning that difference back to Cursor1. If this is done a few times in a row, you end up just dropping Cursor1 to (0,0).
James
LabVIEW Professional 2014

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Unknown graph cursor tool

I'm hoping someone can identify a graph "tool" that's interfering with my LabVIEW program. It's not on the normal graph palette and I can't find reference to it anywhere. It activates seemingly on its own during runtime, and sticks around if I abort execution (its behavior appears to be coded into the graph itself). I wasn't able to take a good screenshot of what the pointer looks like when the tool is active, so I've included a scaled-up drawing below (pointer is the black/white parts).
Some additional details:
- It usually activates when the mouse point hovers over one of the cursors on my XY graph (but only under certain conditions that are not 100% reproducible). The graph cursors are free dragging, and the tool has only activated when I had more than 1 plot on the XY graph.
- If I click on a graph cursor when this tool is active and drag in either the +/- Y direction, the Y scale min/max values change to seemingly random values and the Y scale begins scrolling up. Nothing happens if I move the cursor in purely the +/- X direction.
Much thanks in advance.

Okay, I've been able to reproduce the problem consistently in a much simpler VI (attached). It only contains is a single XY graph, with no code on the block diagram. There's some data saved on the graph, and I put a bunch of cursors on it. When I follow the steps below, I've been able to reproduce the issue 100% of the time.
I should note that I'm using LabVIEW 2014 Professional (64 bit) on Windows 7.
Attachments:
Test.vi ‏118 KB

Unexpected Windows cursor/Waveform Graph cursor behavior

Hi,
I got a very strange Windows cursor behavior with waveform graph. Simplified VI is attached.
LabVIEW 2014 SP1
The problem is:
The VI contains only one waveform graph.
1. I start the VI. Cursor Movement Tool is selected in the Graph Palette by default. Corresponding “Cross with dot” Windows cursor appears when mouse is moved over the plot area (see image). So far so good.
2. I select Zoom in the Graph Palette and use it two-five times (second image).
3. I select Cursor Movement Tool in the Graph Palette again but Windows cursor does not change as it should. It is an open cross now (third image); i.e. the same as shall appear when cross of Graph Cursor Lines is reached.
4. I click mouse three-seven times anywhere in the plot area and the cursor becomes normal (as in the first image).
The problem is not only in shape of the Windows cursor. The whole Graph cursor functionality does not work properly if the Windows cursor has the wrong shape.
Please advise what could cause this problem.

It seems, i cannot explain the question in good way
It is not about my data or zooming. It is about strange bahaviour of the Graph. The following sequence of steps illustrates the problem and shows that the zooming is not the issue (or, at least, not the main issue):
I do the following:
1. Start the VI.
2. Select first Graph cursor in Corsor palette and use pop-up menu "Bring to Center".
3. Zoom couple of times (not too much) keeping the Grapg cursor visible.
4. Select Cursor Movement Tool in the Graph Palette.
5. "Open cross" Windows cursor appears from the beginning. I cannot pick up the Graph cursor.
6. Click left button of the mouse several times in any poin of the graph area.
7. Windows cursor is changed to the normal "cross with central point".
8 Now I can pick up the Graph cursor.
I would suspect problems with zoom until p.5. However p.6-8 are done without any change of the zoom.
By the way, I found more:
If I try to move the Graph cursor after p.5, the whole graph moves and fires event "Scale Range Change". It must not happen with Cursor Movement Tool selected.
I can guess only about some strange setting of the graph. May be I am not aware about them

Windows 7 displays error message when exiting +cursor issue

Two issues here. CS5 Phoshop on Wind 7 64 bit.
Physical processor count: 8
Processor speed: 3073 MHz
Built-in memory: 12279 MB
Free memory: 9577 MB
Memory available to Photoshop: 10934 MB
Memory used by Photoshop: 80 %
Image tile size: 128K
First issue is since the latest automatic Adobe update (why fix what isn't broken?) Every time I now exit Photoshop I get the message "Adobe QT Server has stoped working" and occasionally it happens when I exit bridge. Indesign is also behaving badly. I can no longer start a previous document from file manager without ID crashing out.
The other is the cursors in Clone and erase lose their edge (become invisable) for no reason - well not quite. Noise Ninja crashed Photoshop when I tried to use it. I reinstalled it and all is well. The cursor issue seems to be intermittant but came back (for no reason) after I reinstalled NN. I can't seem to change the cursor, no matter what I do. The problem is now seriously affecting how I work. Almost enough to go back to Win XP which ran CS5 Photoshop flawlessly.
Any help will be gratefully accepted.
Doug

function(){return A.apply(null,[this].concat($A(arguments)))}
doug87510 wrote:
The recent problem is the entire outline of the cursor (including the crosshair in the middle) was missing at any size of cursor. All I had was exactly what I'd get if I used a real spraygun.
Well, that issue is simply a matter of hitting the Caps Lock key. When Caps Lock is on, you'll see the cursor outline, and when it is off you'll see a crosshair. That's a feature, not a bug.
Glad to hear the 11.1 drivers are out. I will download them and try them now myself.
Regarding "Adobe QT" crashing... QT brings to mind QuickTime, though that is Apple, not Adobe. Do you have Apple QuickTime installed?
Regarding memory usage, with 12 GB of installed RAM, you should be able to set Photoshop to use 90% or more in Edit - Preferences - Performance.
-Noel

How do I get an event-based response to a graph cursor change?

I want to respond to the user moving a cursor on a data (X-Y) graph. (LV 7.0)
What I really want is an event called "Graph.Cursor.Value Change", which would supply me with the new coordinates, but I see no such event.
If I use the MOUSE MOVE event to trigger obtaining the cursor values, it does not give me an event, until the cursor has stopped moving, the button is up, and the mouse moves off the cursor line.
Sure, I could use a TIMEOUT event, and read it every 100 mSec, but I don't like the time lag.
What I did was to set a flag TRUE on Graph.MouseDown and FALSE on Graph.MouseUp. I then choose an event timeout of 10 mSec or -1, depending on that flag.
That works, but is there a more direct way that I'm missing?
Steve Bird
Culverson Software - Elegant software that is a pleasure to use.
Culverson.com
Blog for (mostly LabVIEW) programmers: Tips And Tricks

No, unfortunately there is not.
To code around this limitation, I typically use the timeout event in a more complex way as follows:
The timeout is wired to a shift register that is initialized with "-1" (no timeout). The value from the shift register then crosses the event structure and feeds to the shift register on the right in almost all event cases.
I add two special event cases:
(1) "graph-mouse down" puts a small number (e.g. 10ms) in the right timeout shift register
(2) "graph-mouse up" puts again a -1 in the right timeout shift register
(x) All other event cases (incl. timeout) wire the current timeout straight across to the right shift register.
The timeout event contains the logic to read the graph cursors and associated actions.
This way there is normally infinite timeout. Once the mouse goes down on the graph, the timeout executes at relatively rapid succession until the mouse is raised again. At which point everything quiets down.
LabVIEW Champion . Do more with less code and in less time .

Graph Cursor Controls

On the graph cursor control (the 4 sectioned diamond that appears withthe cursor legend) I'm wondering what the top and bottom diamond do if anything. The left and right ones are simple enough (forward or back one sample) but the top and bottom ones don't seem to do anything from what I can tell. Are they just for decoration?
Solved!
Go to Solution.

Dan,
I never noticed that before but you're right, in a multi plot graph the up/down diamonds will attach the cursor to a different plot. I never noticed before because I usually change my cursor style so as to not show the horizontal line (just shows the vertical stripe for the cursor).

XY Graph cursor Error

Hello
This error was found, when I started using LabView 8, with my old LabView 6.1 VI's.
I have encountered a minor error on my Graph display. I noticed my Y-Scale numbers go negative, if I Press and Hold my Graph cursor, while I am moving it.
I run this same test using New LV 8 XY Graph and numbers do not go negative, but they surely flicker a lot + numbers still change some.
Have you noticed this before? Is there some new property I need to set up, to make my LabView 6.1 Graph stable? Is this known bug or am I just doing something wrong?
Here is VI for your testing. My LabView 8 version is 8.0.0.4005.
Just run it and while moving yellow cursor (press+hold+move), after 1-2 seconds of holding something happens.
Yours
Kari
Attachments:
Cursor Test.vi ‏84 KB

Hello Karik.
I experience the exact same problem in the application I'm programming.
The only solution I have come up with is having the cursors Y-axis
centered in the visible area of the graph.
However this is really bad because there is will create a smal "hole"
in the cursor bar, it looks awfull. I think this is a bug in lv8 since
in lv7.1 I could tie down the y-axis to like -10000 or something and
the problem would not appear.
Hope NI fixes this problem really really soon.
//Andreas

Xy graph cursor blinks

Hi All,
I have an xy graph and i cud find that the graph cursor always seems to blink....
I never had such a problem before...
Anybody knows solution for this
Thanks in advance

Hi,
I attached the screen shot and example VI for you.You can right click on the Curosr tool and select snap to cursor.MAy be you can send me the screen shot of your VI ,so can see what going on.
Regards.
Syed.
Attachments:
gengraph.llb ‏32 KB
XY.JPG ‏170 KB

XY graph cursor position bug

I have reproduced the bug mentioned here:
http://forums.lavag.org/Graph-Cursor-XY-Position-Bug-t1366.html&gopid=40859#entry40859
I've reproduced this bug (?) in Labview 8.5, with an XY graph doing
much the same as Jack. The attached zip file contains a stripped down
version of my program (originally written by my coworker, Andrew
MacDonald). Run "RENA3 Data Viewer.vi" and follow the instructions.
As Jack said, changing Cursor.PosX to Cursor.Index solves the problem.
I did not find this bug mentioned anywhere other than the above link.
Fraser
Attachments:
XY Graph Cursor Bug.zip ‏142 KB

Hi Karla,
Sorry if that wasn't as obvious as I thought! :-) Hopefully the attached image makes it clear. On the front panel, 'Cursor Channel' is inputted. This is directly wired to Histogram.Cursor.PosX. Immediately following, Histogram.Cursor.PosX is read and wired to the front panel indicator 'Cursor.Cursor Position:Cursor X'. There is always a difference of 15 or 16 between the two values. If there was no bug, these two values should be identical! I can only conclude that Labview is doing something funny...
As I mentioned before, changing Cursor.PosX to Cursor.Index fixes the problem.
A bit of background: my FWHM function outputs the peak channel, and the cursor is supposed to go through the peak so you can have a visual check that it is analyzing the right peak. I noticed that the line would never go through the peak; the line would always have an offset. After wasting a couple of hours, it became clear that I was wiring the correct value into 'Cursor.PosX', but something was going wrong beyond that.
Cheers,
Fraser
Message Edited by fjharris on 01-25-2008 11:34 AM
Message Edited by fjharris on 01-25-2008 11:36 AM
Attachments:
Labview Bug.png ‏27 KB

XY Graph Cursor Problem in Labview 7.1.1?

Hallo,
I am using Labview 7.1.1 and I am facing one problem with XY graph cursor. If I am moving cursor in one graph, I am expecting same movement in another Graph. But when I move cursor in Graph1, cursor in second graph moves but not to exact X value of Graph1.
Property of Cursor in both graphs must be "Lock to Plot"
If any body knows about this please let me know ASAP. I am attaching example VI for your reference.
Thanks,
Sashi
Attachments:
XY Graph Cursor Problem.vi ‏101 KB

It's a curious effect. Probably the floating point coordinate is sensitive to the exact pixel alignment (I mean that this would not happen if we had for example 1 pixel per point in the X direction).
Anyway, if you use Cursor Index instead (which is an integer) the behaviour is as expected.
Paolo
Paolo
LV 7.0, 7.1, 8.0.1, 2011

Mixed Signal Graph: Cursor Position Property for Multi-Plot Cursor

I'm working 6 waveforms on 3 different plot areas in a mixed signal graph in LV2009. When I try to pull the Cursor.PosY property from my cursor (in which Watch All Plots is True, and is set to Multi-Plot in the graph properties), it returns the value of only the first plot in the cluster of waveforms fed into the graph. I've tried changing the active plot, active plot area, nothing changes. I am able to retrieve each value via the cursor legend, but I cannot pull each of those values into another portion of my program. Also, I noticed that when setting events in an event structure, any events relating to a cursor drag aren't present as they are in a waveform graph. My workaround is to create an indicator for the Cursor.PosX property and monitor when that value changes, but I feel there should be an easier way. Any help is appreciated.
Thank you in advance!

Jeanius,
I am not quite sure why the cursor pos in the Wavegraph reference does not change when you change the active plot, but if you grab a reference to the specific cursor and then change the active plot things you receive the expected behavior.
Ben J.
National Instruments
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MODDEDmixed graph cursor ex.vi ‏41 KB

Different cursor issue in CS4 and Window7 x64 Ultimate....

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I have built a few PCs and have been doing computers since the early 80's. This is pissing me off! I've tried everything and done a lot of research.
I have Windows7, 64 bit Ultimate, with the latest updates. I have a almost new MSI (Nvidia), 9800 GT graphics card and fancy dual monitors. Photoshop PS4 (version 11.01), and... what else? A PC that was not giving me issues (in Photoshop), till I loaded Windows7!
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I cannot get the 196.21 driver to install. Windows says I have the latest.
Now, I have read about people with partial cursor issues in PS, but nobody with my problem. Such a pisser that you don't know if it is Nvidia, Windows7 or Photoshop.
Lastly, I tried turning off "Enable OpenGL drawing".

The 3 cursor problem could by this advice supplied recently by dec9. "You have your computer Display settings set higher then 100 DPI. Change it to 100 percent or lower." That worked for the other poster.
I have seen posts that stated user had to go in and "scrub" out the old drivers as an update was just not overwriting the old one completely. Not a computer geek so hope this helps.

Mouse cursor issues (changes back to arrow)

I keep having this annoying issue with the cursor of my mouse. It works just fine for a while, but after few hours (usually working with PS, Illustrator etc.) there is this thing happening - if I want to resize a window, an Illustrator object, or if I move the cursor over a hyperlink - cursor changes from an arrow to a hand or whatever desired sign - but just for a second and goes back to arrow! It is highly annoying. :/
Idk the source of this problem, but I might add that I once installed a patch for Yosemite, which changes Helvetica system font for Lucida Grande. I uninstalled it though...
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Many thanks.

Same problem.
My setup:
MBP running OS X 10.9
Apple TV running 6.0 (6646.65)
Samsung HD TV
It's only happening when I have mirroring turned on (not extended desktop), and when I have the mirrored resolution set to match the TV. The TV has a larger viewing area than my Macbook Pro. My MBP screen resolution is set to "Scaled: Best for retina"
This started happening after the update to Mavericks.
EDIT:
This solved it for me: I had Air Display running in the background, and the new version of Air Display automatically tries to connect to devices when it's running. My iPad is out, and I think Air Display might have been trying to connect to it. I quit Air Display and the cursor issue is gone.
Message was edited by: brassknucklenerd

Qucik Graph Cursor Legend Questions

Hi all,
I have a couple of quick questions regarding my graph cursor legend:
1. Is it possible to move the position of the cursor legend during runtime? I cannot seem to drag it around the graph?
2. Can I hide/remove the cursor mover? This is not needed and is for this vi as I need to be able to manually drag the cursors only.
I am accessing the cursor legend during runtime through a right-click and selecting "visable items:.
Thanks,
Jack

Hi please check Using Cursor Legend in this link if it is helpful
http://zone.ni.com/reference/en-XX/help/371361J-01/lvconcepts/customizing_graphs_and_charts/
Sorry i don't know exact answer for questions, But did you try property node of Cursor.
-To access it, right click the graph indicator in Black Diagram and go to create>>Property Node>>Cursor.
-Lot of options regarding cursor available there, you can make selected property to write or change the parameter. and check this for help on cursor properties
http://zone.ni.com/reference/en-XX/help/371361J-01/lvprop/cursor_p/
Thanks
uday,
Please Mark the solution as accepted if your problem is solved and help author by clicking on kudoes
Certified LabVIEW Associate Developer (CLAD) Using LV13

Change mouse cursor over graph cursor.

Is there a way to change the mouse cursor as it moves over graph cursors when using trackmode TrackDragCursor? To indicate that you can position the cursor.

You could accomplish this with the graph's CursorMouseMove event. For example, create a new project with the NI Measurement Studio AppWizard and follow these steps:
Add a graph to the dialog. Right-click on the graph in the dialog editor, click "Class Wizard ...", click the Member Variables tab and add a member variable for the graph called m_graph. Click OK.
Right-click on the graph in the dialog editor and click on "Events ...". Add an event handler for CursorMouseMove called OnCursorMouseMove and add an event handler for PlotAreaMouseMove called OnPlotAreaMouseMove. Click OK.
Go to the header file for your dialog class and add this to the bottom of the class declaration:
private:
bool m_cursorChanged;
HCURSOR m_defaultCursor;
HCURSOR m_crossCursor;
Go to the source file for your dialog class and add this to the end of the
OnInitDialog method:
m_graph.TrackMode = CNiGraph::TrackAllEvents;
m_graph.Cursors.Add();
m_cursorChanged = false;
m_defaultCursor = ::LoadCursor(NULL, IDC_ARROW);
m_crossCursor = ::LoadCursor(NULL, IDC_CROSS);
Add this to your CursorMouseMove event hander:
if (!m_cursorChanged)
:etCursor(m_crossCursor);
m_cursorChanged = false;
Add this to your PlotAreaMouseMove event handler:
if (m_cursorChanged)
:etCursor(m_defaultCursor);
m_cursorChanged = true;
Run the application. You should see that the mouse cursor changes to a cross when you mouse over the cursor.
Hope this helps.
- Elton

Xy graph cursor issue

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