Cast of references...

Similar Questions

• How to create ProcessModel calculate TOTAL as follows to call the file in the sequence?

  I made a custom operator Interface and I want to support a progress bar for giving the user indicates to what extent this time they represent.   I already have the infrastructure of reminder Setup so that the progress bar will be updated based on a Message from the user of the motor.

  In the process template itself, I put in place a "ProcessModelPostStep" (the purple one) reminder so that after all the steps of the calling sequence file I increment an internal counter and send these data as well as the Message of the user.

  The only missing part is to know how to calculate the TOTAL number of steps in the sequence file calling.  I can get the total number of SEQUENCES defined in the calling file but I how to recursively on each sequence loop excluded from top down by counting all the steps of the sequence of the callee.

  Appreciate any help in getting this last piece in place.

  Thank you!

  I have a better solution in the images below.  The code snippet is the code called by TestStand to introduce recursion.

  The attached code is the recursive call.  It is similar to my first post, but the fixed a bug with the cast of references.

  This should get the total number of step.  The code works under some assumptions:

  1. all called sequences are in the same file in sequence.  (You can add steps to also get the path to the movie file and retrieves the sequence from there.)

  2. There is no asynchronous LabVIEW step in TestStand.  (These are treated as sequence calls into the API, and you must add code to sort.)

  

  Pulido Technologies LLC

• Name of access to case / battery inside the case using VI scripts

  Hello everyone. I have a script that finds all instances of a specific under vi. All instances of this subroutine VI will be contained in a box structure. Using VI scripts, I want to be able to cross back and determine the name of the case that the sub vi is in. Is attached an image of the code that I currently have, however he mistakes in the part where I cast the reference to a case structure. Anyone know what I am doing wrong? Thank you.

  
  

• How to call a method abstract in Java

  Hi all

  I am new to Java, and have been learning. I have a question here. I came across the following Java class and trying to understand but got confused how he is able to call an abstract method. Here's the code I'm referring to:

  package sampleapps.gui;

  Javax.swing import. *;

  import java.awt.*. *;

  public class InnerClassAnimationExample {}

  int x = 70, y = 70;

  Public Shared Sub main (String [] args) {}

  InnerClassAnimationExample innerClassAnimationExample = new InnerClassAnimationExample();

  innerClassAnimationExample.go ();

  }

  public void getCurrentCard {}

  JFrame frame = new JFrame();

  frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);

  NewMyDrawPanel drawPanel = new NewMyDrawPanel();

  frame.getContentPane () .add (drawPanel);

  frame.setSize (300, 300);

  frame.setVisible (true);

  for (int i = 0; i < 500; i ++) {}

  x ++ ;

  y ++ ;

  drawPanel.repaint ();

  try {}

  Thread.Sleep (50);

  } catch (Exception e) {}

  e.printStackTrace ();

  }

  }

  }

  class NewMyDrawPanel extends JPanel {

  {} public void paintComponent (Graphics g)

  Graphics2D g2d = (Graphics2D) g;

  Red int = (int) (Math. random() * 255);

  int green = (int) (Math.Random () * 255);

  Blue int = (int) (Math. random() * 255);

  Color startColor = new color (red, green, blue);

  Red = (int) (Math. random () * 255);

  Green = (int) (Math.Random () * 255);

  Blue = (int) (Math.Random () * 255);

  Color endColor = new color (red, green, blue);

  GradientPaint gradient = new GradientPaint (7070, startColor, 150 150, endColor); We can also use colors straight as Color.RED, Color.BLUE

  GradientPaint gradient = new GradientPaint (7070, startColor, 150 150, endColor);

  g2d.setColor (Color.White);

  g2d.fillRect (0, 0, this.getWidth (), this.getHeight ());

  g2d.setPaint (gradient);

  g2d.fillOval (x, y, 40, 40);

  }

  }

  }

  For example, in the code above, there are an internal NewMyDrawPanel class that has a method paintComponent (Graphics g). I've highlighted the 2 lines of code above.

  Line 1 : Graphics2D g2d = (Graphics2D) g;

  Line 2 : g2d.fillOval(x,y,40,40);

  
  

  I understand that we are casting type reference to Graphics2D g reference g2d and we call the method fillOval() on g2d. I do not see a method of fillOval() in the Graphics2D class but it's there in the Graphics class and Filloval()) method is an abstract method.

  So my question is:

  1. If we are not able to instantiate an abstract class (Graphics2D Graphics classes) and how are we able to access the abstract method fillOval()

  2. Secondly, given that the fillOval() method is an abstract method, it has no implementation for the method. However, when I call the method fillOval() on Graphics2D reference, I was able to draw and fill in an oval of the specified coordinates. Then, where the actual implementation code would be?

  Could you please, somebody explain how this happened? Pls help.

  Thanks in advance.

  Mahesh Reddy Y V wrote:

  1. If we are not able to instantiate an abstract class (Graphics2D Graphics classes) and how are we able to access the abstract method fillOval()

  2. Secondly, given that the fillOval() method is an abstract method, it has no implementation for the method. However, when I call the method fillOval() on Graphics2D reference, I was able to draw and fill in an oval of the specified coordinates. Then, where the actual implementation code would be?

  The point of having the Graphics class declaring fillOval() summary, is that we can have confidence that all the graph goes instantiable subclass is an implementation of this method. You as the user of this unknown implementer of graphics have no need of care including probably several classes in this legacy hirarchie did the implementation. You just trust in the fact that it must be there, because the java compiler takes care of this.

  Good bye

  DPT

• This work, but why?

  I loaded an external swf into a parent file and tried to call a function the parentt (native to the external swf) using the reference below:

  container.portfolioPage.aContainer.loadedArtwork.adjustLoader ();

  The code on the timeline for MovieClip aContainer was as follows:

  < code >

  var artworkLoaded:Boolean = false;

  function fileLoaded(event:Event):void
  {

  var loadedArtwork:MovieClip = MovieClip (aLoader.content);
  addChild (aLoader);
  artworkLoaded = true;
  }

  var aLoader: Loader = new Loader();
  var req:URLRequest = new URLRequest ("artwork.swf");

  progPortfolio.loader = aLoader.
  aLoader.contentLoaderInfo.addEventListener (Event.COMPLETE, fileLoaded);
  aLoader.load (req);

  < code >

  When I tested the parent, I got:

  TypeError: Error #1010: a term is undefined and has no properties.

  Then, I changed the reference in the parent file for:

  container.portfolioPage.aContainer.aLoader.content.adjustLoader ();

  And it worked as expected initially.

  Why the original casting of reference as a MovieClip aLoader.content didn't work?  I tried to replace addChild (aLoader) with addChild (loadedArtwork), but got the same results.

  It's exactly the opposite of what I thought would work.  Can someone please "dispel" a beginner?

  because you did the local loadedArtwork to fileLoaded() and you have tried to use this reference before loading is complete.

  to remedy this, use:

  var loadedArtwork:MovieClip

  function fileLoaded(event:Event):void
  {

  loadedArtwork = MovieClip (aLoader.content);
  addChild (aLoader);
  artworkLoaded = true;

  You can now reference loadedArtwork
  }

• Strictly typed Enum reference "is not a simple upward or downwards cast" strictly typed reference enum

  Facing a weird problem with Enums. I am filling an enum dynamically to allow some dynamic distribution during user input. I'm almost done, and this is the case:

  

  The front panel on the right is the "Setup Enum" vi. On the left is the main VI, with a strictly typed control enum reference enter this VI. I have attached the vi hierarchy; Open "Curve.vi choose" to solve problems.

  Solved this problem by changing ring datatype. Another question, when I change the label-increment/decrement property on that control manually, the code to change the label via a property node does not work unless I run the Subvi individually. I have the Subvi ("all the curves of Base Setup.vi") open (edit: same behavior no matter if the VI is open or closed). Why is this?

• Chromecast - Airport Extreme: not casting

  Hello everyone, so I bought a new rMBP and I also had to get the Airport extreme combo all the experience.

  I have a 2015 rMBP, Airport Extreme, Apple TV, iPhone Chromecast 6, laptop computer Dell Windows 10 & 1320c Dell Color Laser printer.

  I've never had a problem before, but after I installed my new router (AE) and connecting all my devices, I do not see tab cast in any of my applications of melting of chrome.   I wonder if apple don't just market talk to chromecast.

  Really, I don't want to have to buy an another apple tv for the living room, I'm fine with the help of the chromecast with my laptop and other applications. Can someone please shed some light on this situation?  I need help and have exhausted all my resources and have not been able to find anything online in reference. Keep in mind, I am very Tech savvy and never had this kind of problem before. So everything is correctly connected, connected, and put in place. Just can't go to my chromecast.  What is a block from the Airport extreme? because it works very well with my Netgear WNDR3700 N600.   Thank you, I appreciate any help on this.

  ---------

  Please check previous post and my reply. He always refers to your question. The only difference is that Google updated list routers include the A1408 AirPort Extreme... which is still not compatible with Chromecast.

• FPGA Interface Cast question

  I play with a VST 5644 and model VST streaming.  On the FPGA VI, I added the code, then added an indicator of the face before of the FPGA VI and compiled.  Executes the FPGA VI in interactive execution mode, the indicator works well.  Side host, however, I can't access the new indicator with read/write control.

  Coming out of the open FPGA VI reference I can see the indicator on the wire, but in the Dynamic Cast of Interface FPGA function is have rooted out the refnum somehow.  If I connect to control read/write directly to the output of the function of open reference I can access the indicator very well.

  No idea what I am doing wrong?

  Thank you.

  You re-configured your FPGA VI reference with the new bitfile interface?  The cast of dynamic interface defines the lead as all methods and indicators according to the type of wire connected.  You can right click on the constant of type and select "Configure the FPGA VI... of reference".  In the pop up window that follows, select "import of bitfile...". "and select the new bitfile you've built.

  You must update the fpga reference type in the "Device Session.ctl" type def as well.  This is the type that you will be able to access throughout the project.

  

• Get all reference - modified controls: problem with LV2009 (and not LV8.6.1)

  I modified reference.vi get all the controls (http://zone.ni.com/devzone/cda/epd/p/id/2902) and it works very well in LV8.6.1.  With LV2009, I get the class conflicts of wire (for references).

  With LV8.6.1

  

  With LV2009

  

  I tried to type cast (more generic class) but it doesn't work, someone has an idea to solve the problem?

  Jean-Marc

  I agree with you,

  I made the changes as soon as this morning.  I just need the reference of the tab control itself (I don't need references from pages). I used 'generic' instead of 'control' and I catalogued to a more specific class (control) in step 5 in the block diagram.

  
  Thank you

  Jean-Marc

  The changed files are available at http://forums.ni.com/ni/board/message?board.id=4170&thread.id=30464 (I apologize to not upgrade this post).

• LVOOP - Casting Weirdness

  I discovered a strange behavior of the method "to more specific class '... I use LV2011SP1.

  My request:

  I have an application that analyzes a collection of blobs of data, with each blob of data defined by a class of LV. Each of these blobs of data inherit from a common parent. I store my collection of BLOB data in a table. Standard stuff.

  Obviously each blob data must be upcast to the parent type when stored in a table, but the execution of each element of the array value is kept as a type of child correct data.

  It is part of the analysis where I have to do some type of control for some of the blobs, so I use the primitive "to more specific class" in an attempt to cast the elements of my table to the desired data type. A mismatch between the input type and the target type should produce an error, right?

  Here's the weird part:

  • If I use the method "to more specific class ' to directly mount a class of the child to a different type, the cast fails (as expected).
  
  
  • When I use the method "to more specific class" to one of my elements of array cast to a different type, the cast * always * succeeds. Why?

  The image below illustrates the problem. Ferrari and Mini are the two children in the car. Mini cast Ferrari gives an error (as expected), but casting an upcasted Ferrari version Mini works! This seems strange to me since the execution of the target type value is 'Ferrari' (as illustrated by the probe).

  Then why the method "to more specific class ' use values of execution of its entries?

  

  Just a quick follow-up...

  I found all my answers in this post over at LAVA: http://lavag.org/topic/16081-am-i-understanding-the-reason-why-i-have-to-use-preserve-rt-class-corre...

  It seems that the function of "preserve the Runtime class" does exactly what I need, i.e., it performs its type checking based on the value of execution of the reference to entry class. On the other hand, the function "to the more class specific" is very similar but not the verification at the time of publishingof its type.

  The information is useful, but not so clear from the help page!

• What exactly does the Cast Image VI IMAQ?

  Hello world

  I want to convert an RGB image to grayscale. Now, I can do this, using the Cast IMAQ Image VI. But now, I was wondering what exacly this VI only? How does make an image in grayscale to RGB image? What happens under the hood?

  Hope someone can tell me, since I don't really know. Thanks in advance ^^.

  For each conversion type, there are specific operation. In your case VI defines the destination value to the average of the elements of the source of three colors.
  To learn more:
  http://zone.NI.com/reference/en-XX/help/370281P-01/imaqvision/casting_images/

• Are there different types of references to screw? This example needs to be so complicated?

  "Forced Nonlinear Curve Fit.vi" requires some other VI implements the shape of the model must be adapted and requires a reference to this VI as one of its inputs.

  It seems that there are several kinds of references to screw - why? What are they and how do I know which one to use?

  I have attached a vi that the curve fitting with the vi mentioned above, and it also sets up the reference for the other vi that contains the model, also attached. By the comments, I thought that some simple reference pointing to the model VI would be all he needs, but he seems to need a dynamic reference that has been altered by cast to another type of reference vi. At least, if I understand this right.

  Can anyone shine light on it or hit me somewhere useful? Note that I already saw a context-sensitive help to create references to the screws.
  That's where I got my instructions.

  cebailey,

  If you right-click your static VI reference and select strictly "Typ VI reference", then you can connect in the constraint Nonlinear Curve Fit VI.  The VI curve adjustment uses a call by the reference node, which does not accept that strictly type (specific to a given link pane) references.

  Here are some help of LabVIEW on static references to VI:

  http://zone.NI.com/reference/en-XX/help/371361E-01/Glang/static_vi_ref/

  Chris M

• Properties through control reference

  I have a group of digital controls. I would like to control properties of these individual controls (persons with disabilities, Visible, value, NumText.Format, and NumText.Precision) by passing a reference to the cluster on the main vi, to one under vi.

  Breast of my Subvi I wire my reference to the Controls property of [] cluster to get an array of references to elements within the cluster following the order of the items in cluster.

  Using this table of references I find properties available for the disabled, Visible properties and value options, among others. However, there are no options, to control NumText.Format and NumText.Precision.

  Suggestions, or perhaps another way to address the issue?

  Thank you!

  Table of control references will be a generic class and therefore cannot be defined specific propertiies. To access the specific control properties, you must cast to a more specific class first. If all controls are of the same type, you can simply throw all, using the "most specific type", for numeric types. This should make the NumText available properties for the parameter.

  

• Problem of brick wall: clusters, the size of the reference table

  Good morning forums,

  I hit a brick wall with my application and I hope someone can help!

  I have an array of clusters of size for an indeterminate period (the cluster is generic and data contained irrelevant.).

  Entries to the VI are: a reference to the matrix and a Variant that contains the data.

  My problem is that I need to determine the size of these two entries in table and I can't find a way to do it!

  If the table contained a standard data type I can use the class name property to determine the data type and the size of the array returned by the property "select size" to determine the size of the dimension.  With this information, I can throw the variant into the correct data type and use it to determine the size of the array.  If the data is a cluster to the name class simply returns 'cluster' then I'm so not able to determine the size and can't get the Variant.

  I'm not worried about the casting of data (once I've determined the size this bit is childless), I just need determine the size (and preferably number of dimensions) of the array. Is this possible?

  Cheers for any help

  J

  Use 'Variant to data change' variant of an array of variant and take the importance of that.

  

  Ed.

  Opps missed the variable number of condition of dimensions, in this case, you want to "Format Picture" of OpenG as mentioned blawson.

• property nodes, controls reference

  Hello

  I just want to know what is the difference between the two approaches below to see in the excerpt. Both work. What is the real role/reason for the conversion? Both are OK to use?

  Thank you!

  

  It depends on what you are feeding into it.

  If really you are breast-feeding refs control CREDITS, then the TYPECAST does nothing.

  If, however, you are breast-feeding in mixed references (Boolean, string, I64, cluster), then the TYPECAST throws everything in GENERIC refs.

  I would NEVER recommend doing this, however.

  1. If all you do changes the ownership of persons with DISABILITIES, and given that the DISABLED property is common to all controls (i.e. Generic), generic Ref is fine as it is.

  2 - If you need to cast, use the MORE GENERIC TYPE CAST or the SPECIFIC TYPE CAST MORE and let them tell you (error) if there is a problem.  The TYPECAST will take whatever you give him and spit out a reference, but it will not necessarily legitimate.

  Using the MORE SPECIFIC TYPE CAST is useful when you get an array of controls from a cluster, but you KNOW they are all list boxes, then you can throw in a type of list box and do things specific to the ListBox on each of them.