appeal of painting in the class as xtends screen

Similar Questions

• Is it possible to get the class of a generic Type?

  I wanted to male a generic class to map the static fields of a class, of the same type (think < tt > < /tt > Color.RED) and the only way I could find to get the class fields / was passing the literal class to the constructor. Is there a way to do this with a constructor with no arguments?

  package darrylbu.util;
  
  import java.lang.reflect.*;
  import java.util.*;
  
  public class StaticFieldMap<T> extends HashMap<String, T> {
  
    @SuppressWarnings("unchecked")
    public StaticFieldMap(Class<T> clazz) {
      Field[] fields = clazz.getDeclaredFields();
      for (Field field : fields) {
        if (field.getType() == clazz) {
          try {
            put(field.getName(), (T) field.get(null));
          } catch (IllegalArgumentException ex) {
            ex.printStackTrace();
          } catch (IllegalAccessException ex) {
            ex.printStackTrace();
          }
        }
      }
    }
  }

  Since the usual question what about the reflection is usually "why?" I am including a possible use case.

  import darrylbu.util.StaticFieldMap;
  import java.awt.Color;
  import java.util.Map;
  import javax.swing.*;
  import javax.swing.event.ListSelectionEvent;
  import javax.swing.event.ListSelectionListener;
  
  public class ColorMapDemo {
  
    public static void main(String[] args) throws Exception {
      SwingUtilities.invokeLater(new Runnable() {
  
        @Override
        public void run() {
          new ColorMapDemo().makeUI();
        }
      });
    }
  
    public void makeUI() {
      final Map<String, Color> colorMap = new StaticFieldMap<Color>(Color.class);
      String[] data = colorMap.keySet().toArray(new String[] {});
      final JPanel panel = new JPanel();
      final JList list = new JList(data);
      list.addListSelectionListener(new ListSelectionListener() {
  
        public void valueChanged(ListSelectionEvent e) {
          if (!e.getValueIsAdjusting()) {
            panel.setBackground(colorMap.get((String)list.getSelectedValue()));
          }
        }
      });
      list.setSelectedIndex(0);
      panel.add(new JScrollPane(list));
      JFrame frame = new JFrame();
      frame.add(panel);
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setSize(300, 300);
      frame.setLocationRelativeTo(null);
      frame.setVisible(true);
    }
  }

  Thank you for reading this and for your advice.
  
  DB

  Darryl Burke wrote:
  Thanks Ben. Sorry - what a j.l.r. type?

  A java.lang.reflect.Type all j.l.Class implements this interface. What you have to do is this.getClass () .getGenericSuperclass () of the class, the cast of the Type returned to ParameterizedType, call getActualTypeArguments() and the result would be the color class object.

  I don't really have the "requirements" being just a hobby programmer. But the other day I wrote a program to display all "named colors" of javafx.scene.paint.Color (there is a lot more than in java.awt.Color) and I felt that a utility class/method can be useful to have around.

  Well, the technique described above is somewhat fragile, but achievable. If it is 'just' for a project, you need to decide for yourself if it's the right person.

  Composition of favour over the legacy; StaticFieldMap should implement the map and delegate to an internal hash table.

  Must do it, thanks. I guess that your reasoning behind the advice is that the class is a card but is-not-a HashMap. Am I wrong?

  Correct, and the implementation details would be so leaked into your public API if it were to inherit from HashMap.

  Or do you think it would be better/cleaner to do this with a utility method?

  Yes. However, playing with the API j.l.r.Type is a good learning experience. I remember trying to use seriously and then thinking changed his mind. However there are cases where it makes sense to use [1].

  With greetings
  Ben

  [1] http://code.google.com/p/google-guice/wiki/FrequentlyAskedQuestions#How_to_inject_class_with_generic_type?

• Can I paint on the face for iMovie?

  Can I paint on the face for iMovie?

  If so, can you tell me how?

  N °

• I teach a cardio dance class on the inside and I can't give them a many exact calories when class ends.  The only choice is on the Apple Watch is the 'other' and I know that the class Burns 600 calories in an hour, but my watch shows only 250-350 burned. 

  I use my Apple Watch throughout the day and when I teach a cardio dance class, the number of calories is MUCH lower than other materials.  Why is the Watch not count my calories accurately?  The ladies like to know the calories to burn when the class is over and I can't give them using my Apple Watch.  Others in this class that wear the watch tells you how many is not too accurate.  We burn usually about 600 + calories and I'll be happy if my registers 350.  What could be wrong? Thank you!

  Hello

  Do not forget that Apple Watch uses Active calories (those who are burned by orders or travel) as the main measure for the app to training and activity app.

  Many other applications of fitness / devices report total calories, which consists of active calories + calories at rest (that your body is still burning even when you're not active).

  More information:

  Use the activity on your Apple Watch - Apple Support

• Is it possible to recover the cluster labels in the data of the class?

  Is it possible to recover the cluster labels in the data of the class?

  I'm looking to use the labels of the cluster in the class data to build an insert sql on a mysql database.  I am currently doing this way by using a cluster control, but it becomes big enough and I want to reorganize.

  Thank you

  Zac

  

• Classification error. The class begins is greater at the end of the class.

  Hello

  I am looking for a solution to an error that doesn't make much sense to me:

  Error in (online: 75, column: 3):

  Classification error. The class begins is greater at the end of the class.

  It seems that when I call the VBS attached on the PDM also attached. Tiara 2012. The index file does not make through the system of download here.

  It seems to be triggered by funtion ChnHistogram() and the help page says something about ClassBegin/end being "global settings". What do these? Where we fixed them.

  Thanks in advance for clues.

  Hey cubz,.

  script is great for debug it quickly.

  The problem is caused by the ChnHistogram 75 online. It happens in the 3rd iteration of the loop to the detour.

  The issue seems to be the ClassBegin or ClassEnd parameter. I think the error message should tell you that ClassBegin > ClassEnd, but this needs debugging later.

  Best regards, Stephan

• Lint trap fails with the Classes of LV

  LV2013, LVRT 2013, Win7

  I'm working on a large (1600 + screw) of the project, for a few years now.

  Long ago, I created a program of "lint filter.  Here's what it does:

  1... make a list of all the files in all of the LLBs in the project folder and subfolders.

  2... to read a file of EXCLUSION and remove screws specified in the list.

  3 open... all HAND screw for programs (one by one).

  4.. remove this VI from the list.

  5... find out all subVIs called by this main VI. Remove them from the list.

  6... find out all subVIs called by THESE subVIs.  Remove them from the list.

  7... repeat 3-6 until all screws are covered.

  All that is left is "Lint" - live have any appellants.  If it's a dynamically called VI, I put in the EXCLUSION list and run again.

  The point is the discovery of false starts and screws I created, but not a not end up using.  I can then delete those and keep the code free of lint.

  Everything works beautifully for years, until I started to use objects (LV).  For the last month, I was including a descendants of class and severel parent in the project.

  The project works.

  However, it has generated a lot of fluff.  Some of the old code has been replaced, and I made a few false starts, he didn't screw is not used.

  The problem is - the lint filter reports now over 200 lint screws, some of them I know are really. (If I remove one, the main VI is broken).

  I traced the problem to the fact that the Classes appear to be invisible.

  Here's some code that continues the screw and subVIs, etc.. :

  

  The problem is - the exit CALLED this property node does not list all the LVCLASS elements, or any screws that take an entry CLASS.

  Even a simple test cases, and with a constant of CLASS and a CLASS VI, will not be displayed.

  Any normally called VI is in the list, but if it is related to a class, it is forgotten.

  Anyone have any ideas on how to make lint filter works in this case?

  Technical support comes through (thanks, Chris!) with a response:

  Given a reference of VI, there is a method (call the node) called GET VI RELATIONSHIPS that can be used.

  There are all sorts of options, which must INCLUDE all OVERRIDES THEM.

  I guess that will always leave a substitution that I wrote, but never actually call.

  Yet, this is a great step in the right direction, and it is MUCH faster than through the chain myself.

  

• You can survey objects to see if the class data were populated in a child method?

  Question,

  If a parent method is cast down to the child class, and then a method is used to update some data in the class data, that the data is visible with a probe on the wire coming from the object? Or is the data view of the data in the parent class data and not the child?

  I have a problem where the parent class is executed instead of the child's class and I can't understand why...

  Thanks for all the ideas.

  I don't know if I know more precisely what you're asking, but maybe this will help you.

  

  The default probe will show you the data that makes up the type of wire.  Thus, for children's classes it shows data childs and no ancestor.

  If it is a top-level class thread displays only the data for the parent class, it will inform you of the actual wire type, since we know children can spend as their parents.

  Now, I think that what you're asking, is if it is possible to see the data for children, the son of parents.  I don't know, but you should be able to make sensors for you show more information based on the actual type.

• Add attributes to the class IMAQdx

  I have a Subvi change several attributes of the camera; However, none of these attributes are included in the class IMAQdx.  Therefore, I have to use a long doubling property node where each value, I want to view or change, I must first write this attribute as current attribute.  Is it possible to add attributes to the class, so they will fill in the list of nodes of property of the attributes of the camera?

  Sorry, no, it is not possible today. We are actively seeking improvements API to address this kind of problem in the future versions, however. Out of curiosity, are properties youj are eager to change provider-specific or are common already specified by the features Standard Naming Convention (http://www.emva.org/cms/upload/Standards/GenICam_Downloads/GenICam_SFNC_2_2.pdf)

  Eric

• TestStand Java - 1500 error cannot find the class

  Hello world

  I use Java 1.7 and TestStand 2010.

  I try to add a java class in the computer example folder and call the method.

  The java class is just as below, because I'm just trying to call my own java class.

  I put the class path to start the JAVA virtual machine in the directory where the example of the computer (which is also the directory where I put my java class).

  TestStand can call methods of the computer, but not mine (received the error 1500 error cannot find class). I put my my java method call among calls for default computer example.

  Also I read similar topics, but again I can not resolve the error.

  Where is the part that I'm bored, in fact? Please share some ideas.

  Note: I even try to leave the empty class path, but TestStand can always call the methods of the computer. Why?

  ----------------------

  public class TestJava {}

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

  }

  public String returnString(boolean a) {}
  Return "success";
  }

  }

  To load a class which is within a package, you can use the package rating (or change the example in order to to use). The path to the class is passed directly to the JAVA virtual machine to load the class, but really what is necessary is the package from the class path, including the full path to the class.

  This means you need to do the following:

  1 set the class path in the base directory where you created all your classes, if you have the following structure:

  • MyFile.java
  • builds
  • • MyPackage
    • • MyFile.class

  You must set the classpath in the builds directory

  2 when you set up your steps, you must set the path to the class in your steps from Java to MyPackage/MyFile.class (note the separator is a forward slash, not used Windows backslash, then the Browse button is not quite help with that).

  Another important thing is that when you set the classpath variable you remove the normal Java class path, if you are using Java classes from the library by default, you may have to add \lib\rt.jar

• Substitution of the class, how to create the child class and then the base class

  I started to write a program for a DMM smart, that the problem is all versions of DMM greet the change company communication.

  My idea is to write a child class for each version, DMM and each Subvi child will replace the Subvi base class.

  My problem is, I first want to create a child class and after I see everything is working, start creating the base class. in this way, I'll see if think the right way.

  My question is

  How can I create a child class and then create the base class and configure the Subvi class of the child to be the substitution of the base class?

  I tried searching in the property of the class, but I don't see anything.

  Thank you

  This can be done and I did on occasion.

  You create the base class with the methods of dynamic distribution, you need (Connector components must be identical to those of the class of the child).

  Set then the legacy of the class inherits this base class.  If your method is defined as a dynamic distribution method in the parent, you will probably now have some errors (unless your method of child was already DD, in which case you might be OK already).

  To change the inheritance of a class, right-click on the properties of the class in your project, and then select Properties.  According to me, the tree of estate is at the lower end of the property.  Click on the 'legacy of change' (or something similar) to choose the class from which you now want to inherit.

• Error 123: Timeout to libFrame_OpenPageRef.vi while trying to open the properties of the class

  I get an error message 123: time-out when you try to open the class properties dialog in a project.

  Here is the image:

  

  Anyone have any suggestions on how to fix this? I need to be able to change the class inheritance and other properties. When you open the properties in a new (empty) project, the dialog box opens very well (as slow as usual, that is). The project contained in this class is very large: something like 1200 live and classes 50 +.

  dthor,

  Another possible workaround solution, which I think you discussed previously, is to add the class to a new project file and change the properties of the class through this project. I change the properties in a new project will change the properties of your project to VI of 1200. However, you will not be able to change properties in the new draft, while the old project is still open.

  Sorry for the inconvience, R & D is trying to solve this problem.

• Save the value LVOOP to the default value of the class programmatically

  Hello!

  I was stuck on this little problem for quite awhile, maybe I can't see the wood for the trees, my intention is perhaps utopian

  Here's what I want to do: retrieve the default value of an existing *.lvclass class (not), change it to some sort of Setup, and then save the back by default to the *.lvclass file (or any other).

  The only planned mounting is on changing the default value, no more, no less.

  I tried a few magic Server VI in vain (LabVIEW crashed)

  Any suggestions?

  See you soon

  Oli

  Hello Oli

  With some, as you named: "Magic VI Server", it is possible to edit the default class data and save it as the same/new class. However, there are at least three major problems:

  • This is not possible in the runtime, because it requires features available only in script development
  • If you want to save the class changed as the new class, she would need to copy all the screws and the controls of this class
  • It is simply inefficient.

  So before we go any further, could you explain more thoroughly, why would you want to? If you have two classes, which are exactly the same, but differ on data default field values, this is absolutely not a good idea and not a good software design. And relying on the default values may generally lead you to unexpected behavior of your program in the future, when you decide to change these default values.

• Class property node information not stored in the class file

  Hello

  did happen to you that you add a property (accessor get/set of an attribute) in a class node, Save the project, move the project to another location and it open and that the property node is missing in the project, although that the file VI is there in the file system? Unfortunately, it causes other screws using the property node is broken after moving the project to new place.

  The class file is some sort of XML and I checked: property node information is missing indeed, that seems to be lost when you save the project to the original location.

  Any idea?

  Peter

  Peter,

  If the content about the VI for the property URL is indeed missing in the file lvclass, it should not be a problem of relatively/absolute path.

  So what I want to know to clear:

  -PC 1 is used to develop the project, including the class (file lvclass and a few screws). You save the project using project explore everything back up?

  -Then you copy EVERYTHING used in the project manually to 2 PC (a unique project directory?).

  -Open the copy on the new machine shows the issue: the lvclass file does not include the entry for the node property accessor get/set screw option, but the screws are in the space provided (in the project folder).

  Is this correct?

  If so, the file lvclass on PC 1 contains about property nodes?

  If the parameter is there, please compare the original file and the copy of the timestamp and size. It seems that the lvclass file is not copied correctly.

  If the parameter is missing on 1 PC, the question must also be enabled on the developer's computer. When you try to save the lvclass file: it overwrites the file and create a new stamp/size for her?

  Otherwise, wait for the lvclass file to be write protected...

  Norbert

  EDIT: We're talking marked yellow question type, do we?

  

• close the class constant

  Use the classes in lvclass to 8.6, if I create an instance of a class, do I need to delete?  For example, if it were a RefNum, I would use the close Reference.vi to dispose of it.  Should this be done with a constant of class?  And if so, how?

  Joe,

  I think that this knowledge base article will answer your question...

  hope this helps,

  Norbert