Combo box slider
I have successfully created a combo box, however, none of the tutorials I have found discuss
the inclusion of a scroll bar within a combo box. I want the data list to revert back to the original
start state when the user clicks on an item in the list (which it does), but I want the user to be
able to select the scroll bar (which is apart of the datalist), and be able to scroll up and down
without the click causing the datalist to revert back to the start state.
Does anyone know how to accomplish this? I would be willing to use Catalyst or Builder.
Which ever would work.
(Above: Can select the list items and data list disappears correctly. When clicking on the scroll bar,
the datalist disappears, too, which I don't want to happen.)
Similar Messages
-
How to modify a combo box for touch panel operation?
Hi,
I'm developping a touch panel controled application.
The first step of the application is user log-in. My application has a small database of names that the user can access via the drop down menu of a combo box.
My problem is that the arrows and the slider of the vertical scroll bar are way too small to be fingers-operated:
Is there a way to modify the size of this scrollbar so that it's not too small for the operators' fingers?
Best regards,
peperHello peper,
As far as I know this is not directly possible (a least not with the control editor).
If you want to, you could also create your own "adapted" control yourself through an XControl.
This one can then (for example) combine a name input, a button and a listbox (with a big vertical scrollbar).
Or is this too far fetched?
Kind Regards,
Thierry C - Applications Engineering Specialist Northern European Region - National Instruments
CLD, CTA
If someone helped you, let them know. Mark as solved and/or give a kudo. -
Combo Box Indicator: mouse wheel bug or feature?
Both ring indicator and slide indicator works fine even when the mouse wheel property is enabled.
But user can change value of the Combo Box indicator at runtime.
Shouldn't it be disabled, by default, just like for the keyboard? After all, it's an indicator.
I know I can disable the mouse wheel feature. It should be disable by default.
Or is there any use of this feature?
George Zou
http://webspace.webring.com/people/og/gtoolbox
Attachments:
Mouse Wheel bug.vi 12 KBI think what you are seeing is a minor bug introduced by the lack of a "Combo Box Indicator" on the palattes. You must drop a control then change direction and there appears to be no built in mouse support property written on direction change leaving you with the default mouse wheel support for a control. Since this is a "windows only" property there might not be an easy way to write the property on direction change without querying App.OS target. And then what do you do on targets that do not have support for the property? Change the behavior? THAT would confuse just about everyone who works with multiple OS's
The work arounds:
Use the key navigation page and pay attention to mouse wheel support for indicators
Add your own combo box indicator to the controls palatte with the right mouse wheel support
Write a VI Analizer test for "Indicator with mouse wheel support"
In Short; this seems like one more thing that can easily trip up a developer. A VI Analizer test for this could help save us from ourselves. Consider uploading yours to the VIA Enthusiasts group
Jeff -
With combo box, a pop up is appeared always....
Hello,
first of all, i use a combo box and a pie chart.
When clicking on a pie slide, i ve activate a pop up window (enable drill-down, insertion type: status list ).
If i close the pop up, using a push button (in data insertion -> Source data : a blank cell & in data insertion -> Destination : the corresponding cell of the pie slide for which the pop up should be appeared ), and then i choose another label from combo box, the pop up window is appeared again without having clicked on the corresponding pie slide before....
So, is there any trick / solution to the above problem??
thanks in advance!Hi Ramana,
i 've done exactly what you suggest but the problem still exists....
Here is what i ve done....
At drill down tab of initial pie chart, have you setted a Source Data area? (destination data is the cell B32 as you suggest...).
As i set insertion type of enable drill down "Row", i write the legends of initial pie chart in a row at Excel.. e.g.
A B C D
77 legend1 (cell A77) legend2 (cell B77) legend3 (C77) 0
78 0 0 0
79
I set:
Source data : A78:C78
Destination : A78
A79 = IF(OR(A79= "legend1";A79= "legend2";A79= "legend3");A79=1000;A79=4000)
At pop up pie chart:
dynamic visibility : Status (A79) & Key (1000)
at push button: Source data (D77) & Destination (A78)
At your xlf file you don't face this problem by setting these options? I might do something wrong.. i dont know..!
Should i ve missed something, please let me know...
Thanks a lot... -
How to populate data in the data table on combo box change event
hi
i am deepak .
i am very new to JSF.
my problem is i want to populate data in the datatable on the combo box change event.
for example ---
combo box has name of the city. when i will select a city
the details of the city should populate in the datatable. and if i will select another city then the datatable should change accordingly..
its urgent
reply as soon as possible
thanks in advancei am using Rational Application Developer to develop my application.
i am using a combo box and i am assigning cityName from the SDO.
and i am declaring a variable in the pageCode eg.
private String cityName;
public void setCityName(String cityName){
this.cityName = cityName;
public String getCityName(){
return cityName;
<h:selectOneMenu id="menu1" styleClass="selectOneMenu" value="#{pc_Test1.loginID}" valueChangeListener="#{pc_Test1.handleMenu1ValueChange}">
<f:selectItems
value="#{selectitems.pc_Test1.usercombo.LOGINID.LOGINID.toArray}" />
</h:selectOneMenu>
<hx:behavior event="onchange" target="menu1" behaviorAction="get"
targetAction="box1"></hx:behavior>
and also i am declaring a requestParam type variable named city;
and at the onChangeEvent i am writing the code
public void handleMenu1ValueChange(ValueChangeEvent valueChangedEvent) {
FacesContext context = FacesContext.getCurrentInstance();
Map requestScope = ext.getApplication().createValueBinding("#{requestScope}").getValue(context);
requestScope.put("login",(String)valueChangedEvent.getNewValue());
and also i am creating another SDO which is used to populate data in datatable and in this SDO in the where clause i am using that requestParam .
it is assigning value in the pageCode variable and in the requestParam but it is not populating the dataTable. i don't no why??
it is possible that i may not clear at this point.
please send me the way how my problem can be solved.
thanks in advance -
I am developing a desktop application in Wpf using MVVM and Entity Frameworks. I have the following tables:
1. Party (PartyId, Name)
2. Case (CaseId, CaseNo)
3. Petitioner (CaseId, PartyId) ............. Link Table
I am completely new to .Net and to begin with I download Microsoft's sample application and
following the pattern I have been successful in creating several tabs. The problem started only when I wanted to implement many-to-many relationship. The sample application has not covered the scenario where there can be a any-to-many relationship. However
with the help of MSDN forum I came to know about a link table and managed to solve entity framework issues pertaining to many-to-many relationship. Here is the screenshot of my application to show you what I have achieved so far.
And now the problem I want the forum to address is how to bind a combo box so that it retrieves Party.Name for the corresponding PartyId in the Link Table and also I want to populate it with Party.Name so that
users can choose one from the dropdown list to add or edit the petitioner.Hello Barry,
Thanks a lot for responding to my query. As I am completely new to .Net and following the pattern of Microsoft's Employee Tracker sample it seems difficult to clearly understand the concept and implement it in a scenario which is different than what is in
the sample available at the link you supplied.
To get the idea of the thing here is my code behind of a view vBoxPetitioner:
<UserControl x:Class="CCIS.View.Case.vBoxPetitioner"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:v="clr-namespace:CCIS.View.Case"
xmlns:vm="clr-namespace:CCIS.ViewModel.Case"
mc:Ignorable="d"
d:DesignWidth="300"
d:DesignHeight="200">
<UserControl.Resources>
<DataTemplate DataType="{x:Type vm:vmPetitioner}">
<v:vPetitioner Margin="0,2,0,0" />
</DataTemplate>
</UserControl.Resources>
<Grid>
<HeaderedContentControl>
<HeaderedContentControl.Header>
<StackPanel Orientation="Horizontal" HorizontalAlignment="Right">
<TextBlock Margin="2">
<Hyperlink Command="{Binding Path=AddPetitionerCommand}">Add Petitioner</Hyperlink>
| <Hyperlink Command="{Binding Path=DeletePetitionerCommand}">Delete</Hyperlink>
</TextBlock>
</StackPanel>
</HeaderedContentControl.Header>
<ListBox BorderThickness="0" SelectedItem="{Binding Path=CurrentPetitioner, Mode=TwoWay}" ItemsSource="{Binding Path=tblParties}" />
</HeaderedContentControl>
</Grid>
</UserControl>
This part is working fine as it loads another view that is vPetioner perfectly in the manner I want it to be.
Here is the code of vmPetitioner, a ViewModel:
Imports Microsoft.VisualBasic
Imports System.Collections.ObjectModel
Imports System
Imports CCIS.Model.Party
Namespace CCIS.ViewModel.Case
''' <summary>
''' ViewModel of an individual Email
''' </summary>
Public Class vmPetitioner
Inherits vmParty
''' <summary>
''' The Email object backing this ViewModel
''' </summary>
Private petitioner As tblParty
''' <summary>
''' Initializes a new instance of the EmailViewModel class.
''' </summary>
''' <param name="detail">The underlying Email this ViewModel is to be based on</param>
Public Sub New(ByVal detail As tblParty)
If detail Is Nothing Then
Throw New ArgumentNullException("detail")
End If
Me.petitioner = detail
End Sub
''' <summary>
''' Gets the underlying Email this ViewModel is based on
''' </summary>
Public Overrides ReadOnly Property Model() As tblParty
Get
Return Me.petitioner
End Get
End Property
''' <summary>
''' Gets or sets the actual email address
''' </summary>
Public Property fldPartyId() As String
Get
Return Me.petitioner.fldPartyId
End Get
Set(ByVal value As String)
Me.petitioner.fldPartyId = value
Me.OnPropertyChanged("fldPartyId")
End Set
End Property
End Class
End Namespace
And below is the ViewMode vmParty which vmPetitioner Inherits:
Imports Microsoft.VisualBasic
Imports System
Imports System.Collections.Generic
Imports CCIS.Model.Case
Imports CCIS.Model.Party
Imports CCIS.ViewModel.Helpers
Namespace CCIS.ViewModel.Case
''' <summary>
''' Common functionality for ViewModels of an individual ContactDetail
''' </summary>
Public MustInherit Class vmParty
Inherits ViewModelBase
''' <summary>
''' Gets the underlying ContactDetail this ViewModel is based on
''' </summary>
Public MustOverride ReadOnly Property Model() As tblParty
'''' <summary>
'''' Gets the underlying ContactDetail this ViewModel is based on
'''' </summary>
'Public MustOverride ReadOnly Property Model() As tblAdvocate
''' <summary>
''' Gets or sets the name of this department
''' </summary>
Public Property fldName() As String
Get
Return Me.Model.fldName
End Get
Set(ByVal value As String)
Me.Model.fldName = value
Me.OnPropertyChanged("fldName")
End Set
End Property
''' <summary>
''' Constructs a view model to represent the supplied ContactDetail
''' </summary>
''' <param name="detail">The detail to build a ViewModel for</param>
''' <returns>The constructed ViewModel, null if one can't be built</returns>
Public Shared Function BuildViewModel(ByVal detail As tblParty) As vmParty
If detail Is Nothing Then
Throw New ArgumentNullException("detail")
End If
Dim e As tblParty = TryCast(detail, tblParty)
If e IsNot Nothing Then
Return New vmPetitioner(e)
End If
Return Nothing
End Function
End Class
End Namespace
And final the code behind of the view vPetitioner:
<UserControl x:Class="CCIS.View.Case.vPetitioner"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:vm="clr-namespace:CCIS.ViewModel.Case"
mc:Ignorable="d"
Width="300">
<UserControl.Resources>
<ResourceDictionary Source=".\CompactFormStyles.xaml" />
</UserControl.Resources>
<Grid>
<Border Style="{StaticResource DetailBorder}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<TextBlock Grid.Column="0" Text="Petitioner:" />
<ComboBox Grid.Column="1" Width="240" SelectedValuePath="." SelectedItem="{Binding Path=tblParty}" ItemsSource="{Binding Path=PetitionerLookup}" DisplayMemberPath="fldName" />
</Grid>
</Border>
</Grid>
</UserControl>
The problem, presumably, seems to be is that the binding path "PetitionerLookup" of the ItemSource of the Combo box in the view vPetitioner exists in a different ViewModel vmCase which serves as an ObservableCollection for MainViewModel. Therefore,
what I need to Know is how to route the binding path if it exists in a different ViewModel?
Sir, I look forward to your early reply bringing a workable solution to the problem I face.
Warm Regards,
Arun -
Not able to populate data in the combo box
Hi Guys,
I m new to flex development and I want to populate the data
coming from the databasein the combobox.I am able to get the length
.but not able to populate the data.
Can anyone helpme out?
The code is below:
The data displayed in the combox box is displayed as
[object],[object] etc.I m sure that the data is coming from the
database and its not populated in the combo box.any help is
appreciated.
private function getParkinfo(event:ResultEvent):void
{ Alert.show(event.result.length.toString());
countries.dataProvider = event.result;
<mx:ComboBox id="countries" />What does the data look like in the result? Is it XML? Post a
sample of it. -
Display data in list and combo box
hi all....
how to display data from database in list and combo box? i use MYSQL...
help me please..... tq...1 - Write a query to retrieve the data you want from database
2 - In a servlet, connect to database, Run the query, scroll through the result set and put the data into a list of Java Objects.
3 - Set a request/session attribute of that list of objects
4 - Forward to JSP
5 - In JSP, create a <select> box, and then use a <c:forEach> loop to generate <option> tags from the list. -
Show text box from one combo box selection
Total newb here and need help. I tried searching for a javascript to copy/paste, but without any luck. I am using Acrobat Pro 9.2.0. If you could help me out with the javascript or with directions on how to make the following be accomplished, I would be greatly appreciative.
I am creating a fillable PDF and currently have a combo box that is labeled "Internship Satisfied By" with the options of "TCoB PDP", "MRKTNG 4185", and "Other College". I would like a hidden text box (where the end user can fill in to explain) to become visible only when the end user selects the "Other College" option, but stay hidden for the other selections. The hidden text box is labeled "Internship Explained".
Thanks in advance! JarrodUse this code as the combo box's validation script:
if (event.value == "Other College") {
getField("Internship Explained").display = display.visible;
} else {
getField("Internship Explained").display = display.hidden; -
Adding an event listener to combo box
I am working on a mortgage calculator and I cannot figure out how to add an event listener to a combo box.
I want to get the mortgage term and interest rate to calucate the mortgage using the combo cox. Here is my program.
Modify the mortgage program to allow the user to input the amount of a mortgage
and then select from a menu of mortgage loans: 7 year at 5.35%, 15 year at 5.50%, and
30 year at 5.75%. Use an array for the different loans. Display the mortgage payment
amount. Then, list the loan balance and interest paid for each payment over the term
of the loan. Allow the user to loop back and enter a new amount and make a new
selection, with resulting new values. Allow user to exit if running as an application
(can't do that for an applet though).
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.event.*;
import java.text.NumberFormat;
import java.util.Locale;
//creates class MortgageCalculator
public class MortgageCalculator extends JFrame implements ActionListener {
//creates title for calculator
JPanel row = new JPanel();
JLabel mortgageCalculator = new JLabel("MORTGAGE CALCULATOR", JLabel.CENTER);
//creates labels and text fields for amount entered
JPanel firstRow = new JPanel(new GridLayout(3,1,1,1));
JLabel mortgageLabel = new JLabel("Mortgage Payment $", JLabel.LEFT);
JTextField mortgageAmount = new JTextField(10);
JPanel secondRow = new JPanel();
JLabel termLabel = new JLabel("Mortgage Term/Interest Rate", JLabel.LEFT);
String[] term = {"7", "15", "30"};
JComboBox mortgageTerm = new JComboBox(term);
JPanel thirdRow = new JPanel();
JLabel interestLabel = new JLabel("Interest Rate (%)", JLabel.LEFT);
String[] interest = {"5.35", "5.50", "5.75"};
JComboBox interestRate = new JComboBox(interest);
JPanel fourthRow = new JPanel(new GridLayout(3, 2, 10, 10));
JLabel paymentLabel = new JLabel("Monthly Payment $", JLabel.LEFT);
JTextField monthlyPayment = new JTextField(10);
//create buttons to calculate payment and clear fields
JPanel fifthRow = new JPanel(new GridLayout(3, 2, 1, 1));
JButton calculateButton = new JButton("CALCULATE PAYMENT");
JButton clearButton = new JButton("CLEAR");
JButton exitButton = new JButton("EXIT");
//Display area
JPanel sixthRow = new JPanel(new GridLayout(2, 2, 10, 10));
JLabel displayArea = new JLabel(" ", JLabel.LEFT);
JTextArea textarea = new JTextArea(" ", 8, 50);
public MortgageCalculator() {
super("Mortgage Calculator"); //title of frame
setSize(550, 350); //size of frame
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container pane = getContentPane();
GridLayout grid = new GridLayout(7, 3, 10, 10);
pane.setLayout(grid);
pane.add(row);
pane.add(mortgageCalculator);
pane.add(firstRow);
pane.add(mortgageLabel);
pane.add(mortgageAmount);
pane.add(secondRow);
pane.add(termLabel);
pane.add(mortgageTerm);
pane.add(thirdRow);
pane.add(interestLabel);
pane.add(interestRate);
pane.add(fourthRow);
pane.add(paymentLabel);
pane.add(monthlyPayment);
monthlyPayment.setEnabled(false);
pane.add(fifthRow);
pane.add(calculateButton);
pane.add(clearButton);
pane.add(exitButton);
pane.add(sixthRow);
pane.add(textarea); //adds texaarea to frame
pane.add(displayArea);
setContentPane(pane);
setVisible(true);
//Adds Listener to buttons
calculateButton.addActionListener(this);
clearButton.addActionListener(this);
exitButton.addActionListener(this);
mortgageTerm.addActionListener(this);
interestRate.addActionListener(this);
public void actionPerformed(ActionEvent event) {
Object command = event.getSource();
JComboBox mortgageTerm = (JComboBox)event.getSource();
String termYear = (String)mortgageTerm.getSelectedItem();
if (command == calculateButton) //calculates mortgage payment
int year = Integer.parseInt(mortgageTerm.getText());
double rate = new Double(interestRate.getText()).doubleValue();
double mortgage = new Double(mortgageAmount.getText()).doubleValue();
double interest = rate /100.0 / 12.0;
double monthly = mortgage *(interest/(1-Math.pow(interest+1,-12.0 * year)));
NumberFormat myCurrencyFormatter;
myCurrencyFormatter = NumberFormat.getCurrencyInstance(Locale.US);
monthlyPayment.setText(myCurrencyFormatter.format(monthly));
if(command == clearButton) //clears all text fields
mortgageAmount.setText(null);
//mortgageTerm.setText(null);
//interestRate.setText(null);
monthlyPayment.setText(null);
if(command == exitButton) //sets exit button
System.exit(0);
public static void main(String[] arguments) {
MortgageCalculator mor = new MortgageCalculator();The OP already did this to both JComboBoxes.
mochatay, here is a new actionPerformed method for you to use.
I've improved a few things here and there...
1) You can't just cast the ActionEvent's source into a JComboBox!
What if it was a JButton that fired the event? Then you would get ClassCastExceptions (I'm sure you did)
So check for all options, what the source of the ActionEvent actually was...
2) You can't assume the user will always type in valid data.
So enclose the Integer and Double parse methods in try-catch brakcets.
Then you can do something when you know that the user has entered invalid input
(like tell him/her what a clumsy idiot they are !)
3) As soon as user presses an item in any JComboBox, just re-calculate.
I did this here by programmatically clicking the 'Calculate' button.
Alternatively, you could have a 'calculate' method, which does everything inside the
if(command==calculateButton) if-block.
This will be called when:
a)calculateButton is pressed
b)when either of the JComboBoxes are pressed.
public void actionPerformed (ActionEvent event)
Object command = event.getSource ();
if (command == calculateButton) //calculates mortgage payment
int year = 0;
double rate = 0;
double mortgage = 0;
double interest = 0;
/* If user has input invalid data, tell him so
and return (Exit from this method back to where we were before */
try
year = Integer.parseInt (mortgageTerm.getSelectedItem ().toString ());
rate = new Double (interestRate.getSelectedItem ().toString ()).doubleValue ();
mortgage = new Double (mortgageAmount.getText ()).doubleValue ();
interest = rate / 100.0 / 12.0;
catch (NumberFormatException nfe)
/* Display a message Dialogue box with a message */
JOptionPane.showMessageDialog (this, "Error! Invalid input!");
return;
double monthly = mortgage * (interest / (1 - Math.pow (interest + 1, -12.0 * year)));
NumberFormat myCurrencyFormatter;
myCurrencyFormatter = NumberFormat.getCurrencyInstance (Locale.US);
monthlyPayment.setText (myCurrencyFormatter.format (monthly));
else if (command == clearButton) //clears all text fields
/* Better than setting it to null (I think) */
mortgageAmount.setText ("");
//mortgageTerm.setText(null);
//interestRate.setText(null);
monthlyPayment.setText ("");
else if (command == exitButton) //sets exit button
System.exit (0);
else if (command == mortgageTerm)
/* Programmatically 'clicks' the button,
As is user had clicked it */
calculateButton.doClick ();
else if (command == interestRate)
calculateButton.doClick ();
//JComboBox mortgageTerm = (JComboBox) event.getSource ();
//String termYear = (String) mortgageTerm.getSelectedItem ();
}Hope this solves your problems.
I also hope you'll be able to learn from what I've indicated, so you can use similar things yourself
in future!
Regards,
lutha -
How to get the values from xml file to java combo box
Hi frens,
I am new to java and xml programming,
Now, i want to have a code of getting the tag values from the xml file
into the swing combo box of java front end.
How can we do that?
any help of code or tutorial or an ebook is a great help for me.
Thank you,
Karthik.
Edited by: Karthik84 on Aug 27, 2008 1:49 AM
Edited by: Karthik84 on Aug 27, 2008 11:29 PMlook at this link
http://www.stylusstudio.com/docs/v2006/d_help30.html
I read sometime back that castor has a tool to do
conversion. You might have a look into casto as well. -
Retrieve all values from project type when project type combo box is null
Hi,
We are facing a tight situation here. We have a scenario where we have 2 filter options.
1) Department ID
2) Project type
When department ID is selected all the department IDs should be populated in the combo box and the project type combo box should be empty.
Similarly, when project type is selected all the project types should be populated in the combo box and the department ID combo box should be empty.
Then, when more than one value is selected from department ID box and all the values from project type must be retrieved from query level (as per business logic).
How do we do this? Kindly help us with this situation.Basically my situation slightly different.
I am trying to do a bulk insert on SQL Server table using prepared statement, during that time i am getting the exception. I am using JDBC-ODBC driver. However, if i do individual record insertion, it is working.
Any idea about this type of problem ?
Regards
Ramesh -
How can I make the combo box turn to the value of black.
When the show button is pressed (and not before), a filled black square should be
displayed in the display area. The combo box (or drop down list) that enables the user to choose the colour of
the displayed shape and the altering should take effect immediately.When the show button is pressed,
the image should immediately revert to the black square, the combo box should show the value that
correspond to the black.
Now ,the problem is: after I pressed show button, the image is reverted to the black square,but I don't know
how can I make the combo box turn to the value of black.
Any help or hint?Thanks a lot!
coding 1.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class test extends JFrame {
private JPanel buttonPanel;
private DrawPanel myPanel;
private JButton showButton;
private JComboBox colorComboBox;
private boolean isShow;
private int shape;
private boolean isFill=true;
private String colorNames[] = {"black", "blue", "cyan", "darkGray", "gray",
"green", "lightgray", "magenta", "orange",
"pink", "red", "white", "yellow"}; // color names list in ComboBox
private Color colors[] = {Color.black, Color.blue, Color.cyan, Color.darkGray,
Color.gray, Color.green, Color.lightGray, Color.magenta,
Color.orange, Color.pink, Color.red, Color.white, Color.yellow};
public test() {
super("Draw Shapes");
// creat custom drawing panel
myPanel = new DrawPanel(); // instantiate a DrawPanel object
myPanel.setBackground(Color.white);
// set up showButton
// register an event handler for showButton's ActionEvent
showButton = new JButton ("show");
showButton.addActionListener(
// anonymous inner class to handle showButton events
new ActionListener() {
// draw a black filled square shape after clicking showButton
public void actionPerformed (ActionEvent event) {
// call DrawPanel method setShowStatus and pass an parameter
// to decide if show the shape
myPanel.setShowStatus(true);
isShow = myPanel.getShowStatus();
shape = DrawPanel.SQUARE;
// call DrawPanel method setShape to indicate shape to draw
myPanel.setShape(shape);
// call DrawPanel method setFill to indicate to draw a filled shape
myPanel.setFill(true);
// call DrawPanel method draw
myPanel.draw();
myPanel.setFill(true);
myPanel.setForeground(Color.black);
}// end anonymous inner class
);// end call to addActionListener
// set up colorComboBox
// register event handlers for colorComboBox's ItemEvent
colorComboBox = new JComboBox(colorNames);
colorComboBox.setMaximumRowCount(5);
colorComboBox.addItemListener(
// anonymous inner class to handle colorComboBox events
new ItemListener() {
// select shape's color
public void itemStateChanged(ItemEvent event) {
if(event.getStateChange() == ItemEvent.SELECTED)
// call DrawPanel method setForeground
// and pass an element value of colors array
myPanel.setForeground(colors[colorComboBox.getSelectedIndex()]);
myPanel.draw();
}// end anonymous inner class
); // end call to addItemListener
// set up panel containing buttons
buttonPanel = new JPanel();
buttonPanel.setLayout(new GridLayout(4, 1, 0, 50));
buttonPanel.add(showButton);
buttonPanel.add(colorComboBox);
JPanel radioButtonPanel = new JPanel();
radioButtonPanel.setLayout(new GridLayout(2, 1, 0, 20));
Container container = getContentPane();
container.setLayout(new BorderLayout(10,10));
container.add(myPanel, BorderLayout.CENTER);
container.add(buttonPanel, BorderLayout.EAST);
setSize(500, 400);
setVisible(true);
public static void main(String args[]) {
test application = new test();
application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
coding 2
import java.awt.*;
import javax.swing.*;
public class DrawPanel extends JPanel {
public final static int CIRCLE = 1, SQUARE = 2;
private int shape;
private boolean fill;
private boolean showStatus;
private int shapeSize = 100;
private Color foreground;
// draw a specified shape
public void paintComponent (Graphics g){
super.paintComponent(g);
// find center
int x=(getSize().width-shapeSize)/2;
int y=(getSize().height-shapeSize)/2;
if (shape == CIRCLE) {
if (fill == true){
g.setColor(foreground);
g.fillOval(x, y, shapeSize, shapeSize);
else{
g.setColor(foreground);
g.drawOval(x, y, shapeSize, shapeSize);
else if (shape == SQUARE){
if (fill == true){
g.setColor(foreground);
g.fillRect(x, y, shapeSize, shapeSize);
else{
g.setColor(foreground);
g.drawRect(x, y, shapeSize, shapeSize);
// set showStatus value
public void setShowStatus (boolean s) {
showStatus = s;
// return showstatus value
public boolean getShowStatus () {
return showStatus;
// set fill value
public void setFill(boolean isFill) {
fill = isFill;
// set shape value
public void setShape(int shapeToDraw) {
shape = shapeToDraw;
// set shapeSize value
public void setShapeSize(int newShapeSize) {
shapeSize = newShapeSize;
// set foreground value
public void setForeground(Color newColor) {
foreground = newColor;
// repaint DrawPanel
public void draw (){
if(showStatus == true)
repaint();Hello,
does setSelectedIndex(int anIndex)
do what you need?
See Java Doc for JComboBox. -
Combo box with bind variable from popup
Hi.
I had two comboboxes on a form, one having a bind variable. It works great, with the first one as bind field.
But i want to have the first LOV to be a POPUP. So, the second LOV (combo box) needs to be refreshed when a user has picked a value from the popup list. When i do that, the second LOV is not refresehed...
Is there a way to do this?
(3.0.9.8.3.A)Hi,
This was a bug and is fixed in 30984.
Thanks,
Sharmila -
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I would like to know the difference between the elements 'Combo box' and 'Dropdown List' in VC. I am facing an issue where i am invoking an entry list and the output of the first element the entry list returns is getting reflected as the output for all the elements...
So even if 2nd and 3rd row of the o/p from the entry list is giving only 2 items, if the 1st row returns only 1 then we are able to see only 1 item. Its as if the 1st row decides the items to be returned for all the rows.
Please help.Hi Hezi,
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