ComboBox and Array setSelectedIndex

Hi all,
I have created a combo box which gets its items from an array:
String[] crustType = { "Select a Crust", "Thin", "Double Dough", "Stuffed" };
JComboBox crustList = new JComboBox( crustType );Now I want to reset this combo box from a different class file. (I know this is kind of obvious but keep in mind that "pizzeria" is an object of the application and "pInfo" is an object of PizzaInfo which contains the above code for the JComboBox. I've tried things like:
pizzeria.pInfo.crustList.setSelectedIndex( crustType[ 0 ] );
pizzeria.pInfo.crustList.setSelectedIndex( 0 );and all other sorts of combination of code. I guess I'm just not sure how to reset it to the original index of 0 in the array.

I've searched the APIs and I'm wondering if the only way to change or reset the combo box is to originally set it up by setting it up this way
comboBox.addItem(makeObj("Item 1"));
comboBox.addItem(makeObj("Item 1"));
and using
setSelectedItem( "Item 1")
to reset it.

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All the xml and arrays are getting NULL Problem

Hello guys
I am working on a project which uses xml loading, e4x and array manipulation extensively, and it was going good but now I got stuck on a strange problem. Whole code was fine and application was working and responding in a desired way, but then mystourisly it stopped working and started to retun NULL values to almost all the actionscript (internal) Arrays and XML varibales.
Now Whenever i load xml file and assign the loaded values to internal xml variables, internal values get only NULL instead of data.
Same is the situation with Arrays, I created some components in mxml, and when i passed them to arrays by reference, code gets compiled successfully, but again Array has only null values [that code was working fine too]
I am wondering if Adobe Flex did a silenced update or something similar and it is the result of that things !
I am using Adobe Flex 3.2 with SDK 3.3 on windows Vista Ultimate.
Please check this attached project, Import it and see if you face the same problem
Thanks
Link to Problem Project
http://isolatedperson.googlepages.com/problemXperiment.zip
Problem Screenshot
http://isolatedperson.googlepages.com/xmlissue.JPG

Use HTTPService to load the data. You'll have fewer problems.
<?xml version="1.0" encoding="utf-8"?>
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Combobox in array--why does it work this way?

I have attached a snippet of a subVI I'm using to initialize the items and set the values of comboboxes in an array. I modified it slightly so the array being referenced is on this block diagram, not a top level diagram. It took me a while to come to this solution; before I had the combobox part in a for loop and was trying to loop through each array element, get a reference to that element, and set the strings[] and value properties but it was acting all wacky. Then I changed it to the way below and it automatically populates all the comboboxes with the correct values, and then sets their values each to be different (which is what I want!) My question is, why does it work this way? I understand all elements in an array need to be the same (although I did find a work around here.), but the part about setting the values to each be different I was trying to do manually with a property node and a value property, when I realized the combobox just handles it all itself. Is this just a feature of a combobox in an array I need to note for future reference?
edit: I noticed the testers array reference label changed, so hopefully it's still referencing the same control. You may need to relink it.
CLA, LabVIEW Versions 2010-2013
Attachments:
combobox in array snippet.png ‏29 KB

nathand wrote:
Ben wrote:
nathand wrote:
You cannot get a reference to an individual element in an array control. The ArrayElem reference will always refer to the same control regardless of what array index is visible. This isn't specific to a combo-box, every array works like this.
I have not tested it lately but as of the time of this Nugget I found that it will point to the top left visable array element.
The ArrayElem property always returns the same reference no matter which element of the array is in the top-left corner, as demonstrated by the code below (screenshot instead of snippet to avoid mangled references and property nodes).
Yes that is true but the value returned when using a property node >>> value will return the top left displayed value. In the code included in that Nugget, I set the size of the control such that it only shows a single element then by manipulating the index control I can raed each element in the array.
At least that is how it behaved back in the day of that nugget.
Yes, my wife left me home alone with a case of beer and LV to find that tidbit. I suspect that feature will one day disapear without anyone noticing.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

ComboBox and TextInput

I have to add a change event listener...
I did add one something like this....
Private function Change(event:Event):void{
      inputtxt.txt+=event.currentTarget.selectedIndex;
      vs.selectedChild=vsRef;
<mx:TextInput id="inputtxt"/>
<mx:Button id="searchBtn" label="Search" change="Change(event)"/>
***This does nothing for me though***
OR
[Bindable] public var Emp:String;
[Bindable] public var ary:Array = ["Emp name", "Emp number", "Emp id"];
This is my combobox array now I have a text box next it, so that the user can enter name, number or id...
What should be in my change function?, I have:
private function change():void{
          if (cb.selectedIndex==0)
               Emp=cb.selectedItem
          else if (cbEmp.selectedIndex==1)
               Emp=????
          else
               Emp=????
<mx:ComboBox id="cb" dataProvider="{ary}"/>
and how do I store what user has enter....
which one is the right approach and how will they work... I'm just a little confused....
Thanks...

can you show me how to incorporate valueCommit with TextInput, combobox and search and I do have to search based on what the used enter...
So if I have
<mx:Script>
<![CDATA[
[Bindable] public var Emp:String;
[Bindable] public var ary:Array = ["Emp name", "Emp number", "Emp id"];
]]>
</mx:Script>
<mx:ComboBox id="cb" dataProvider="{ary}"/>
<mx:TextInput id="inputtxt"/>
<mx:Button id="searchBtn" label="Search"/>
<mx:ViewStack id="vs">
<src:Ref id="vsRef"/>
</mx:ViewStack>
Now what I want to do is when the user enter either Employee Name or Number or ID in the textInput box next to the combobox filter based on what is selected in combobox (name, number or id) I have to bring up the viewstack which shows the datagrid with data based on what the user has input...
Can anyone help me with how do I incoprporate valueCommit or cb.selectedItem....
I'll really appreciate that.
Thanks...

Loops and Arrays help

Hi,
I'm a freshman in college and new to java. I am completely lost and really need help with a current assignment. Here are the instructions given by my teacher...
Building on provided code:
Loops and Arrays
Tracking Sales
Files Main.java and Sales.java contain a Java application that prompts for and reads in the sales for each of 5 salespeople in a company. Files Main.java and Sales.java can be found here http://www.ecst.csuchico.edu/~amk/foo/csci111/labs/lab6N/Main.java
and here http://www.ecst.csuchico.edu/~amk/foo/csci111/labs/lab6N/Sales.java It then prints out the id and amount of sales for each salesperson and the total sales. Study the code, then compile and run the program to see how it works. Now modify the program as follows:
1. (1 pts) Compute and print the average sale. (You can compute this directly from the total; no new loop is necessary.)
2. (2 pts) Find and print the maximum sale. Print both the id of the salesperson with the max sale and the amount of the sale, e.g., "Salesperson 3 had the highest sale with $4500." Note that you don't necessarily need another loop for this; you can get it in the same loop where the values are read and the sum is computed.
3. (2 pts) Do the same for the minimum sale.
4. (6 pts) After the list, sum, average, max and min have been printed, ask the user to enter a value. Then print the id of each salesperson who exceeded that amount, and the amount of their sales. Also print the total number of salespeople whose sales exceeded the value entered.
5. (2 pts) The salespeople are objecting to having an id of 0-no one wants that designation. Modify your program so that the ids run from 1-5 instead of 0-4. Do not modify the array-just make the information for salesperson 1 reside in array location 0, and so on.
6. (8 pts) Instead of always reading in 5 sales amounts, allow the user to provide the number of sales people and then create an array that is just the right size. The program can then proceed as before. You should do this two ways:
1. at the beginning ask the user (via a prompt) for the number of sales people and then create the new array
2. you should also allow the user to input this as a program argument (which indicates a new Constructor and hence changes to both Main and Sales). You may want to see some notes.
7. (4 pts) Create javadocs and an object model for the lab
You should organize your code so that it is easily readable and provides appropriate methods for appropriate tasks. Generally, variables should have local (method) scope if not needed by multiple methods. If many methods need a variable, it should be an Instance Variable so you do not have to pass it around to methods.
You must create the working application and a web page to provide the applications information (i.e., a page with links to the source code, the javadoc and an object model) to get full credit. You can use the example.html's from the last two labs to help you remember how to do this.
I'm not asking for someone to do this assignment for me...I'm just hoping there is someone out there patient and kind enough to maybe give me a step by step of what to do or how to get started, because I am completely lost from the beginning of #1 in the instructions.
Any help would be much appreciated! Thank you!
Message was edited by:
Scott_010
Message was edited by:
Scott_010

First ask the person who gave this asignment as to why do you require two classes for this , you can have only the Sales.java class with main method in it . Anyways.
Let Main.java have a main method which instanciates a public class Sales and calls a method named say readVal() in Sales class.
In the readVal method of sales class define two arrays i.e ids and sales. Start prompting the user for inputting the id and sales and with user inputting values keep storing it in the respective arrays .. Limit this reading to just 5 i.e only 5 salesPerson.
Once both the arrays are populated, call another method of Sales class which will be used for all computations and output passing both the arrays.
In this new method say Compute() , read values from array and keep calculating total,average and whatever you want by adding steps in just this loop. You can do this in readval method too after reading the values but lets keep the calculation part seperate from input.
You must create the working application and a web page to provide the applications information (i.e., a page with links to the source code, the javadoc and an object model) to get full credit. You can use the example.html's from the last two labs to help you remember how to do this. I think this is ur personal stuff , but if you want to use web page , you probably will require to use servlet to read values from the html form passed to the server.

Castom ComboBox and lose binding

Hello. I'm trying to write my own ComboBox and I ran into a problem.
public class TestComboBox : ComboBox
public static readonly DependencyProperty SelectedCarProperty = DependencyProperty.Register("SelectedCar", typeof(string), typeof(TestComboBox), new FrameworkPropertyMetadata(null, OnSelectedCarPropertyChanged));
public TestComboBox()
this.Cars = new ObservableCollection<string>() { "Select Car", "BMW", "Mersedes", "Audi" };
this.ItemsSource = this.Cars;
this.SelectedItem = this.Cars[0];
public string SelectedCar
get { return (string)GetValue(SelectedCarProperty); }
set { this.SetValue(SelectedCarProperty, value); }
public IList<string> Cars { get; private set; }
protected override void OnSelectionChanged(SelectionChangedEventArgs e)
base.OnSelectionChanged(e);
this.SelectedCar = (string)SelectedItem;
private static void OnSelectedCarPropertyChanged(DependencyObject source, DependencyPropertyChangedEventArgs e)
var car = (string)e.NewValue;
var editor = (TestComboBox)source;
editor.SelectedItem = car;
When I try to install the default value, I lose the binding. If I commented this code, everything works fine.
this.SelectedItem = this.Cars[0];
How can I set the default value without losing binding to the VM
P.S
TestApp

I use this code.
<propgrid:PropertyGrid Margin="0,0,11,7">
<propgrid:PropertyGrid.Items>
<propgrid:PropertyGridCategoryItem DisplayName="Main">
<propgrid:PropertyGridPropertyItem Value="{Binding Car, Mode=TwoWay}"
DisplayName="Car">
<propgrid:PropertyGridPropertyItem.ValueTemplate>
<DataTemplate>
<wpfApplication1:TestComboBox SelectedCar="{Binding Value, Mode=TwoWay, RelativeSource={RelativeSource AncestorType={x:Type propgrid:IPropertyDataAccessor}}}" />
</DataTemplate>
</propgrid:PropertyGridPropertyItem.ValueTemplate>
</propgrid:PropertyGridPropertyItem>
</propgrid:PropertyGridCategoryItem>
</propgrid:PropertyGrid.Items>
</propgrid:PropertyGrid>
I found a solution my problem Ijust replacedthe code
this.SelectedItem = this.Cars[0];
with this
this.Loaded += (sender, args) =>
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How do i split a line in a csv file and populate a combobox and a textbox with the parts

What I'm trying to do is split the line and fill a combobox and with the selecteditem and the textbox with the value of the combobox selecteditem which is the second part of the line split.
Thanks in advance for the help or suggestions.

Then you should create a class to represent the items in the ComboBox:
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Public Property PartA As String
Public Property PartB As String
End Class
...and add instances of this class to the ComboBox:
Try
Dim mydocpath1 As String = Environment.GetFolderPath(Environment.SpecialFolder.Desktop)
Dim mylines() As String = File.ReadAllLines(mydocpath1 + "\TextFile1.txt")
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Dim parts() As String = line.Split(","c)
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Next line
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MsgBox(ex.Message)
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Then you set the DisplayMemberPath of the ComboBox to the name of one property and bind the Text property of the TextBlock to the other one:
<ComboBox Name="cmb1" DisplayMemberPath="PartA" />
<TextBlock Text="{Binding ElementName=cmb1, Path=SelectedItem.PartB}" />
That should solve your issue.
Once again, please remember to mark helpful posts as answer to close your threads and remember that a new thread deserves a new question.

Challeging Traversal of Vector and Array

Hi there ! I would like to render the values of this Vector and Array . How do I print it out to the browser ?
try
ResultSet rset = stmt.executeQuery(myQuery);
System.out.println(" Finish Execute Query !!! ");
/* Array Contruction */
int numColumns = rset.getMetaData().getColumnCount();
while (rset.next())
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Hi there !
Thanks for your help but I managed to get it working. For references purposes, I`ll post it here.
My problem now is this :-
How can I issue another SQL statement and store the results in the same array?
Pls note . One Sql per table so, that`s the issue ?
Can someone help with a followup code ?
try
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System.out.println(" Finish Execute Query !!! ");
/* Array Contruction */
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Hay Gays,
with Writing Spreadsheets i want to cells which contain combobox and other cells which contain checkbox ,i need help with that i tried alot of things ?

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public Component getTableCellRendererComponent(...)
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}It's up to your application to determine which renderer to use for which row. Cell editors create another level of complexity but it's still achievable (I wrote one that mapped Class to TableCellRenderer so it could determine the renderer based on the value's class at runtime - it sort of works but subclasses prove tricky).
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Hi all,
I read the documentation about JTables but couldn't figure out how to solve my problem. I want to render combobox and button in the same JTable cell like in Netbeans. How can I do this? Any suggestions?

Anyone with ideas?

ComboBox and DataTable

Hey All,
I have found a lot of posts on here about adding values to a combo box using the valid values collection. I am trying to assign a datatable to the Combobox in my case. I add my datatable in the xml and assign a query to it. Then I assign that to the databind property of the combobox and when the form loads it only displays the 1st record in the query.
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I basically just want to display the list of item groups in my combo box without manually adding these to the valid values collection.
Curtis

Hi Curtis.
If it can help you this is some methods used in my programs:
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<item uid="cType" type="113" left="100" tab_order="0"
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<databind databound="1" table="@TABLE_A" alias="U_TYPE" />
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See this thread [Fill values in combobox from database table|Fill values in combobox from database table;
5) LoadSeries Method (look SDK Help)
Other ways I don't know.
Best regards
Sierdna S.

NXT Flatten to String Not Working with Clusters and Arrays

Hello,
My name is Joshua and I am from the FIRST Tech Challenge Team 4318, Green Machine. We are trying to write a program that will write to a configuration file and read it back. The idea is that we will be able to write to a config file from our computer that will be read by our autonomous program when it runs. This will define what the autonomous program does.
The easiest way to do this seems to be flattening a data structure to a string, saving it to a file, and then reading back and unflattening it. The issue is that the flatten to string and unflatten from string VIs don't seem to work with arrays and clusters on the NXT. It does work when running on the computer. We've tried arrays, clusters, clusters in arrays and arrays in clusters, none seem to work. Thinking it was something to do with reading the string from a file, we tried bypassing the file functionality, still not working. It does work with basic data types though, such as strings and numbers.
No error is thrown from what we can tell. All you get is a blank data structure out of the unflatten VI.
The program attached is a test program I've been working on to get this functionality to work. It will display the hex content of what is going into the file, coming out of the file, and then the resulting data from the unflatten string, as well as any errors that have been thrown. The data type we are using simulates what we would like to store. There is also a file length in and out counter. The out file is a little larger because the NXT write file VI adds a new line character on to the end (thus the use of the strip white space VI). This character was corrupting even basic data types saved to file.
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Joshua
Attachments:
ReadableTest.vi ‏20 KB

Hi jfireball,
This is a very interesting situation. Take a look at what kbbersch said. I also urge you to post in the FTC Forums. You posted your question to the general LabVIEW forums, but by posting to the FTC Forums, you will have access to others that are using the NXT hardware.
David B.
Applications Engineer
National Instruments

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If this is not acceptable for your application, then just use the "Array Size" VI first to check if you've an empty Array (Array size=0) and then you can pass or not the array to the "And Array Elements" function.
Hope this helps.
Luca
Regards,
Luca

Problems launching Object Manager and Array Manager in SSGD 4.20.983

Hi,
I have just installed SSGD 4.20.983 in a server which is running Solaris 10. The language of this server is Spanish.
When I access to the webtop, I 'm not be able to launch the applications Object Manager and Array Manager.
When I try to launch them, in the details box appears "Contrase�a" and them the timeout expires. Contrase�a is the same that password in Spanish.
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These files should contain more information.
Also take a look at the following section of the Administration Guide: [http://docs.sun.com/source/820-6689/chapter4.html#d0e21816]
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[svn:fx-trunk] 11737: ComboBox and DropDownList bug fixes

Revision: 11737
Author:   [email protected]
Date:     2009-11-12 13:25:33 -0800 (Thu, 12 Nov 2009)
Log Message:
ComboBox and DropDownList bug fixes
SDK-23635 - Implement type-ahead in DropDownList
Added code in DropDownListBase keyDownHandler to listen for letters and change the selection if there is a match. At some point, we should modify findKey and findString (I'll file an ECR for that). For now, I've just overridden findKey and cobbled together the logic from List.findKey and List.findString. In ComboBox, we override findKey to do nothing since ComboBox has its own logic that relies on textInput changes.
SDK-23859 - DropDownList does not reset caretIndex when selection is cleared
Fixed this in two places. In ComboBox.keyDownHandlerHelper, we update the caret index when ESC is pressed. In DropDownListBase.dropDownController_closeHandler, we update the caret index if the commit has been canceled (ie. ESC was pressed).
SDK-24175 - ComboBox does not select an item with ENTER when openOnInput = false
When the ComboBox was closed and the arrow keys were pressed, the selectedIndex was changed. When ENTER was pressed, it was committing actualProposedSelectedIndex, not selectedIndex. The fix is to override the selectedIndex setter to keep actualProposedSelectedIndex in sync if selectedIndex was changed. Usually it is kept in sync when the dropDown is opened.
SDK-24174 - ComboBox does not scroll correctly when openOnInput = false
When typing in a match, the caretIndex was changed, but not the selectedIndex (because matching when it is closed doesn't commit the value until you press ENTER or lose focus). When closed, the navigation keys were changing the selectedIndex relative to the previous selectedIndex. I updated this to change relative to caretIndex instead. In most cases, caretIndex and selectedIndex are equivalent while the dropDown is closed.
Other changes:
- Replaced some calls to dropDownController.isOpen with isDropDownOpen.
- Added protection RTE protection to ComboBox.changeHighlightedSelection
QE notes: None
Doc notes: None
Bugs: SDK-23635, SDK-23859, SDK-24175, SDK-24174
Reviewer: Deepa
Tests run: ComboBox, DropDownList
Is noteworthy for integration: No
Ticket Links:
    http://bugs.adobe.com/jira/browse/SDK-23635
    http://bugs.adobe.com/jira/browse/SDK-23859
    http://bugs.adobe.com/jira/browse/SDK-24175
    http://bugs.adobe.com/jira/browse/SDK-24174
    http://bugs.adobe.com/jira/browse/SDK-23635
    http://bugs.adobe.com/jira/browse/SDK-23859
    http://bugs.adobe.com/jira/browse/SDK-24175
    http://bugs.adobe.com/jira/browse/SDK-24174
Modified Paths:
    flex/sdk/trunk/frameworks/projects/spark/src/spark/components/ComboBox.as
    flex/sdk/trunk/frameworks/projects/spark/src/spark/components/DropDownListBase.as

This bug figures out also when creating a custom spark ComboBox, then trying to programatically update the userProposedSelectedIndex property. The proposed selected index is selected, but does not apply the same skin as when mouse is on rollover or item is selected due to up and down keys.
The issue seems like updating the status of the item renderer to rollover or selected to get the same skin applied.
Please could you attach DropDow nList.as that you edited ?
Thank you so much.

ComboBox and Array setSelectedIndex

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