I'm using trying to use a javafx combobox with a cell factory to render the list, I was using the setText on the override updateItem() of my CellList, but I found out when I change a value on the underlying model, that doesnẗ afects the deployed list on the combo box. So I try to make it binding both properties and It's works but when a try to clear the selection I have a Exception. This is the code:
import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.*;
import javafx.stage.Stage;
import javafx.util.Callback;
public class BasicComboBoxSample extends Application {
public static void main(String[] args) { launch(args); }
#Override public void start(Stage stage) {
final Employee john = new Employee("John");
final Employee jill = new Employee("Jill");
final Employee jack = new Employee("Jack");
final ComboBox<Employee> cboEmployees = new ComboBox();
cboEmployees.getItems().addAll(john, jill, jack);
cboEmployees.setValue(jill);
Button b = new Button("ChangeName");
b.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent actionEvent) {
john.setName("Maria");
}
});
Button c = new Button("Clear");
c.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent actionEvent) {
cboEmployees.getSelectionModel().clearSelection();
}
});
Button d = new Button("Select First");
d.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent actionEvent) {
cboEmployees.getSelectionModel().select(john);
}
});
Callback<ListView<Employee>, ListCell<Employee>> cellFactory = new Callback<ListView<Employee>, ListCell<Employee>>() {
#Override
public ListCell<Employee> call(ListView<Employee> listView) {
return new EmployeeListCell(); //To change body of implemented methods use File | Settings | File Templates.
}
};
cboEmployees.setButtonCell(new EmployeeListCell());
cboEmployees.setCellFactory(cellFactory);
final StackPane layout = new StackPane();
VBox v = new VBox();
v.getChildren().add(cboEmployees);
v.getChildren().add(b);
v.getChildren().add(c);
v.getChildren().add(d);
layout.getChildren().add(v);
layout.setStyle("-fx-background-color: cornsilk; -fx-padding: 15;");
stage.setScene(new Scene(layout));
stage.show();
}
class Employee {
public Employee(String name) { this.setName(name); }
private SimpleStringProperty name = new SimpleStringProperty("");
String getName() {
return name.get();
}
SimpleStringProperty nameProperty() {
return name;
}
void setName(String name) {
this.name.set(name);
}
}
public class EmployeeListCell extends ListCell<Employee> {
#Override
protected void updateItem(Employee emp, boolean b) {
super.updateItem(emp, b);
if(emp != null){
textProperty().bind(emp.nameProperty());
}
}
}
}
And the Exception was:
Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: A bound value cannot be set.
at javafx.beans.property.StringPropertyBase.set(StringPropertyBase.java:157)
at javafx.beans.property.StringPropertyBase.set(StringPropertyBase.java:67)
at javafx.beans.property.StringProperty.setValue(StringProperty.java:84)
at javafx.scene.control.Labeled.setText(Labeled.java:135)
at com.sun.javafx.scene.control.skin.ComboBoxListViewSkin.updateDisplayText(ComboBoxListViewSkin.java:420)
at com.sun.javafx.scene.control.skin.ComboBoxListViewSkin.updateDisplayNode(ComboBoxListViewSkin.java:399)
at com.sun.javafx.scene.control.skin.ComboBoxListViewSkin.getDisplayNode(ComboBoxListViewSkin.java:229)
at com.sun.javafx.scene.control.skin.ComboBoxBaseSkin.updateDisplayArea(ComboBoxBaseSkin.java:125)
at com.sun.javafx.scene.control.skin.ComboBoxBaseSkin.handleControlPropertyChanged(ComboBoxBaseSkin.java:120)
at com.sun.javafx.scene.control.skin.ComboBoxListViewSkin.handleControlPropertyChanged(ComboBoxListViewSkin.java:198)
at com.sun.javafx.scene.control.skin.SkinBase$3.changed(SkinBase.java:282)
at javafx.beans.value.WeakChangeListener.changed(WeakChangeListener.java:107)
at com.sun.javafx.binding.ExpressionHelper$Generic.fireValueChangedEvent(ExpressionHelper.java:367)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:100)
at javafx.beans.property.ObjectPropertyBase.fireValueChangedEvent(ObjectPropertyBase.java:123)
at javafx.beans.property.ObjectPropertyBase.markInvalid(ObjectPropertyBase.java:130)
at javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:163)
at javafx.scene.control.ComboBoxBase.setValue(ComboBoxBase.java:148)
at javafx.scene.control.ComboBox.updateValue(ComboBox.java:416)
at javafx.scene.control.ComboBox.access$300(ComboBox.java:166)
at javafx.scene.control.ComboBox$6.changed(ComboBox.java:401)
at com.sun.javafx.binding.ExpressionHelper$Generic.fireValueChangedEvent(ExpressionHelper.java:367)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:100)
at javafx.beans.property.ReadOnlyObjectWrapper$ReadOnlyPropertyImpl.fireValueChangedEvent(ReadOnlyObjectWrapper.java:195)
at javafx.beans.property.ReadOnlyObjectWrapper.fireValueChangedEvent(ReadOnlyObjectWrapper.java:161)
at javafx.beans.property.ObjectPropertyBase.markInvalid(ObjectPropertyBase.java:130)
at javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:163)
at javafx.scene.control.SelectionModel.setSelectedItem(SelectionModel.java:101)
at javafx.scene.control.ComboBox$ComboBoxSelectionModel$1.invalidated(ComboBox.java:448)
at com.sun.javafx.binding.ExpressionHelper$SingleInvalidation.fireValueChangedEvent(ExpressionHelper.java:155)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:100)
at javafx.beans.property.ReadOnlyIntegerWrapper$ReadOnlyPropertyImpl.fireValueChangedEvent(ReadOnlyIntegerWrapper.java:195)
at javafx.beans.property.ReadOnlyIntegerWrapper.fireValueChangedEvent(ReadOnlyIntegerWrapper.java:161)
at javafx.beans.property.IntegerPropertyBase.markInvalid(IntegerPropertyBase.java:130)
at javafx.beans.property.IntegerPropertyBase.set(IntegerPropertyBase.java:163)
at javafx.scene.control.SelectionModel.setSelectedIndex(SelectionModel.java:67)
at javafx.scene.control.SingleSelectionModel.updateSelectedIndex(SingleSelectionModel.java:208)
at javafx.scene.control.SingleSelectionModel.clearSelection(SingleSelectionModel.java:67)
at de.thomasbolz.javafx.BasicComboBoxSample$2.handle(BasicComboBoxSample.java:45)
at de.thomasbolz.javafx.BasicComboBoxSample$2.handle(BasicComboBoxSample.java:42)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:69)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:217)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:170)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:38)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:53)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:28)
at javafx.event.Event.fireEvent(Event.java:171)
at javafx.scene.Node.fireEvent(Node.java:6863)
at javafx.scene.control.Button.fire(Button.java:179)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:193)
at com.sun.javafx.scene.control.skin.SkinBase$4.handle(SkinBase.java:336)
at com.sun.javafx.scene.control.skin.SkinBase$4.handle(SkinBase.java:329)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:64)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:217)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:170)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:38)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:37)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:35)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:92)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:53)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:33)
at javafx.event.Event.fireEvent(Event.java:171)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3328)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3168)
at javafx.scene.Scene$MouseHandler.access$1900(Scene.java:3123)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1563)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2265)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:250)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:173)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:292)
at com.sun.glass.ui.View.handleMouseEvent(View.java:528)
at com.sun.glass.ui.View.notifyMouse(View.java:922)
at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)
at com.sun.glass.ui.gtk.GtkApplication$3$1.run(GtkApplication.java:82)
at java.lang.Thread.run(Thread.java:722)
You need to unbind the textProperty in case the emp is null
Add the condition in EmployeeListCell class
else {
textProperty().unbind();
}
Related
I am trying to add an extension function, but is failing with :
Caused by: net.sf.saxon.trans.XPathException: Unknown system function follow()
at net.sf.saxon.expr.parser.XPathParser.grumble(XPathParser.java:282)
I see (in debug) that function registered with the integrated library. I was expecting saxon to look for the function in the integrated library but it is searching in system functions and throwing error. What is causing this function to be represented as a system function.
I am using the following :
<dependency>
<groupId>net.sf.saxon</groupId>
<artifactId>Saxon-HE</artifactId>
<version>9.7.0-14</version>
</dependency>
Thank you
my code is
import net.sf.saxon.expr.XPathContext;
import net.sf.saxon.lib.ExtensionFunctionCall;
import net.sf.saxon.lib.ExtensionFunctionDefinition;
import net.sf.saxon.om.Sequence;
import net.sf.saxon.om.StructuredQName;
import net.sf.saxon.s9api.Processor;
import net.sf.saxon.s9api.XPathCompiler;
import net.sf.saxon.s9api.XPathExecutable;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.value.SequenceType;
public class FollowTest {
public static void main(String[] args) throws Exception {
new FollowTest().test();
}
private void test () throws Exception {
Processor proc = new Processor(false);
proc.registerExtensionFunction(new Follow());
XPathCompiler xx = proc.newXPathCompiler();
XPathExecutable x = xx.compile("follow(/a/b/c)/type='xyz'");
}
public class Follow extends ExtensionFunctionDefinition {
#Override
public StructuredQName getFunctionQName() {
return new StructuredQName("", "http://example.com/saxon-extension", "follow");
}
#Override
public int getMinimumNumberOfArguments() {
return 1;
}
#Override
public int getMaximumNumberOfArguments() {
return 1;
}
#Override
public SequenceType[] getArgumentTypes() {
return new net.sf.saxon.value.SequenceType[] {SequenceType.SINGLE_STRING,};
}
#Override
public SequenceType getResultType(SequenceType[] suppliedArgumentTypes) {
return SequenceType.NODE_SEQUENCE;
}
#Override
public boolean trustResultType() {
return true;
}
#Override
public boolean dependsOnFocus() {
return false;
}
#Override
public boolean hasSideEffects() {
return false;
}
#Override
public ExtensionFunctionCall makeCallExpression() {
return null;
}
private class followCall extends ExtensionFunctionCall {
#Override
public Sequence call(XPathContext context, Sequence[] arguments) throws XPathException {
return null;
}
}
}
}
In the XPath expression you have written
follow(/a/b/c)
A function name with no namespace prefix is assumed to be in the default namespace for functions, which by default is the system function namespace http://www.w3.org/2005/xpath-functions. You need to use a prefix that's bound to the URI appearing in the extension function definition, namely http://example.com/saxon-extension
I want to write a Vaadin 7 application (see MyVaadinUI below), which asks the user to enter user name and password.
If they are correct, another view (see MainUI below) should appear and take the entire area (replace the login view).
I tried to implement this transition in the method MyVaadinUI.goToMainWindow, but I get the error
java.lang.RuntimeException: Component must be attached to a session when getConnectorId() is called for the first time
at com.vaadin.server.AbstractClientConnector.getConnectorId(AbstractClientConnector.java:417)
at com.vaadin.server.communication.ConnectorHierarchyWriter.write(ConnectorHierarchyWriter.java:67)
at com.vaadin.server.communication.UidlWriter.write(UidlWriter.java:143)
at com.vaadin.server.communication.UidlRequestHandler.writeUidl(UidlRequestHandler.java:149)
at com.vaadin.server.communication.UidlRequestHandler.synchronizedHandleRequest(UidlRequestHandler.java:97)
at com.vaadin.server.SynchronizedRequestHandler.handleRequest(SynchronizedRequestHandler.java:37)
at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1371)
at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:238)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
when I run the application and press the button.
How can I fix it?
#Theme("mytheme")
#SuppressWarnings("serial")
public class MyVaadinUI extends UI
{
private TextField userNameTextField;
private PasswordField passwordTextField;
#WebServlet(value = "/*", asyncSupported = true)
#VaadinServletConfiguration(productionMode = false, ui = MyVaadinUI.class, widgetset = "ru.mycompany.vaadin.demo.AppWidgetSet")
public static class Servlet extends VaadinServlet {
}
#Override
protected void init(VaadinRequest request) {
final VerticalLayout layout = new VerticalLayout();
layout.setMargin(true);
setContent(layout);
addUserNameTextField(layout);
addPasswordTextField(layout);
addButton(layout, request);
}
private void addPasswordTextField(Layout aLayout) {
passwordTextField = new PasswordField("Пароль:");
aLayout.addComponent(passwordTextField);
}
private void addUserNameTextField(final Layout aLayout) {
userNameTextField = new TextField("Пользователь:");
aLayout.addComponent(userNameTextField);
}
private void addButton(final Layout aParent, final VaadinRequest request) {
final Button button = new Button("Войти");
button.addClickListener(new Button.ClickListener() {
public void buttonClick(Button.ClickEvent event) {
final boolean credentialsCorrect = checkCredentials();
if (credentialsCorrect) {
goToMainWindow(request);
} else {
[...]
}
}
});
aParent.addComponent(button);
}
private void goToMainWindow(final VaadinRequest aRequest) {
final MainUI mainUI = new MainUI();
mainUI.init(aRequest);
setContent(mainUI);
}
}
#Theme("mytheme")
#SuppressWarnings("serial")
public class MainUI extends UI {
#Override
protected void init(final VaadinRequest vaadinRequest) {
final HorizontalSplitPanel splitPanel = new HorizontalSplitPanel();
setContent(splitPanel);
splitPanel.setSizeFull();
splitPanel.setSplitPosition(200, Unit.PIXELS);
final String[] tabLabels = new String[] {
"Tree item 1",
"Tree item 2"};
final Tree tree = new Tree();
for (int i=0; i < tabLabels.length; i++)
{
addTreeItem(tree, tabLabels[i]);
}
splitPanel.setFirstComponent(tree);
splitPanel.setSecondComponent(new Label("Test"));
}
private void addTreeItem(final Tree aTree, final String aLabel) {
aTree.addItem(aLabel);
}
}
On the Vaadin forum someone suggested to use the navigator, which solved my problem.
I'd rather think that MainUI should extend HorizontalSplitPanel, not UI. It is strange concept to me to insert one UI into another.
You can use #SpringUI for the main class which extends UI:
#SpringUI
#Theme("mytheme")
#Widgetset("com.MyAppWidgetset")
#PreserveOnRefresh
public class MainUI extends UI {
private static final long serialVersionUID = -8247521108438815011L;
private static Locale locale = VaadinSession.getCurrent().getLocale();
#Autowired
private ToolBoxMessageSource messageSource;
#Autowired
private SpringViewProvider springViewProvider;
public MainUI() {
}
//Initializes navigator with SpringViewProvider and add all existing
//and ui specific assigned views to navigator.
#Override
protected void init(VaadinRequest vaadinRequest) {
Navigator navigator = new Navigator(this, this);
// Adding springViewProvider for spring autowiring
navigator.addProvider(springViewProvider);
// Adding all views for navigation
navigator.addView(LoginView.NAME, LoginView.class);
navigator.addView(MainView.NAME, MainView.class);
navigator.addView(MailToolView.NAME, MailToolView.class);
navigator.addView(AdminView.NAME, AdminView.class);
navigator.addView(EditRecipientView.NAME, EditRecipientView.class);
navigator.addView(EditRecipientsView.NAME, EditRecipientsView.class);
navigator.addView(ServerView.NAME, ServerView.class);
navigator.addView(TestJobView.NAME, TestJobView.class);
navigator.addView("", new LoginView());
navigator.navigateTo(LoginView.NAME);
navigator.setErrorView(LoginView.class);
// security: if user changes view check if the user has the required rights
navigator.addViewChangeListener(new ViewChangeListener() {
private static final long serialVersionUID = 7330051193056583546L;
#Override
public boolean beforeViewChange(ViewChangeEvent event) {
Toolbox toolbox = getSession().getAttribute(Toolbox.class);
if (TbRightManagement.checkAccess(event.getNewView().getClass(), toolbox)) {
return true;
} else {
if (toolbox != null) {
TBNotification.show(messageSource.getMessage("access.denied.title", locale),
messageSource.getMessage("access.denied.no_permissions.msg", locale),
Type.ERROR_MESSAGE);
navigator.navigateTo(MainView.NAME);
return false;
} else {
TBNotification.show(messageSource.getMessage("access.denied.title", locale),
messageSource.getMessage("access.denied.not_loggedin.msg", locale),
Type.ERROR_MESSAGE);
navigator.navigateTo(LoginView.NAME);
return false;
}
}
}
#Override
public void afterViewChange(ViewChangeEvent event) {}
});
}
}
And for the other views, as an example EditRecipientsView should be a #SpringView which extends a Vaadin Designer and implements a Vaadin View.
#SpringView(name = EditRecipientsView.NAME)
#Theme("mytheme")
#TbRight(loggedIn = true, mailTool = true)
public class EditRecipientsView extends RecipientsDesign implements View {
private static final long serialVersionUID = 1L;
public static final String NAME = "editRecipients";
private static Locale locale = VaadinSession.getCurrent().getLocale();
private BeanItemContainer<Recipient> recipientContainer;
private Uploader uploader;
#Autowired
private ToolBoxMessageSource messageSource;
public EditRecipientsView() {
super();
}
//Initializes the ui components of the recipient view.
#PostConstruct
public void init() {
btn_addRecipient.addClickListener(e -> { MainUI.getCurrent().getNavigator().navigateTo(EditRecipientView.NAME);});
}
//Handling data when entering this view.
#Override
public void enter(ViewChangeEvent event) {
if (getSession().getAttribute(UIMailing.class) != null) {
List<Recipient> recipientList = getSession().getAttribute(UIMailing.class).getRecipients();
if (recipientList != null) {
recipientContainer.removeAllItems();
} else {
recipientList = new ArrayList<Recipient>();
}
recipientContainer.addAll(recipientList);
recipient_table.sort(new Object[] {"foreName", "lastName"}, new boolean[] {true, true});
}
}
}
The code below perform a freehand draw, my problem is that this class compile under Linux but I get error in WindowsXP.
Here is the code
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Node;
import javafx.scene.control.ContextMenu;
import javafx.scene.control.MenuItem;
import javafx.scene.input.ContextMenuEvent;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.input.MouseEvent;
import javafx.scene.paint.Color;
import javafx.scene.shape.Path;
import javafx.scene.shape.PathElement;
public class Freehand {
private Group group ;
private FreeHandDrawPath freehandDraw;
public Freehand(ObservableList<PathElement> _initFreehand) {
this.freehandDraw = new FreeHandDrawPath(_initFreehand);
this.group = new Group();
group.getChildren().add(freehandDraw);
group.addEventHandler(KeyEvent.KEY_PRESSED, new EventHandler<KeyEvent>() {
#Override
public void handle(final KeyEvent keyEvent) {
if (keyEvent.getCode() == KeyCode.DELETE ) {
group.getChildren().removeAll(freehandDraw);
}
}
});
}
class FreeHandDrawPath extends Path {
double x, y;
final ContextMenu contextMenu = new ContextMenu();
final MenuItem itemDelete = new MenuItem("Delete");
FreeHandDrawPath (ObservableList<PathElement> _initFreehand) {
super(_initFreehand);
setStroke(Color.BLACK);
itemDelete.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent e) {
group.getChildren().removeAll(freehandDraw);
//System.out.println("Delete");
}
});
contextMenu.getItems().addAll(itemDelete);
this.addEventHandler(MouseEvent.MOUSE_ENTERED, new EventHandler<MouseEvent>() {
#Override
public void handle(MouseEvent event) {
// just to show that the line is selected
x = event.getX();
y = event.getY();
setStroke(Color.RED);
setStrokeWidth(getStrokeWidth()+4);
group.requestFocus();
event.consume();
}
});
this.addEventHandler(MouseEvent.MOUSE_EXITED, new EventHandler<MouseEvent>() {
#Override
public void handle(MouseEvent event) {
setStroke(Color.BLACK);
setStrokeWidth(getStrokeWidth()-4);
event.consume();
}
});
this.addEventHandler(MouseEvent.MOUSE_PRESSED, new EventHandler<MouseEvent>() {
#Override
public void handle(MouseEvent event) {
if (event.isSecondaryButtonDown()){
setOnContextMenuRequested(
new EventHandler<ContextMenuEvent>() {
#Override
public void handle(ContextMenuEvent event) {
//contextMenu.show(l, Side.RIGHT, 0, 0);
contextMenu.show((Path) event.getSource(), event.getScreenX() + 1, event.getScreenY());
//System.out.println("Hello World!");
}
});
}
event.consume();
}
});
}
}
public Node view() {
return group ;
}
}
Why do I get such error?
Thanks.
In screen1 i have 2 buttons a and b.i have given field change listener for both such that each pushes corresponding screen .When i press button 'a' it pushes say screen2 where i have used a keywordFilter to search words from sqlite database and is listed.These all are perfect when i run the application ,but when i press the back(or previous key) and then press the button 'a' from screen1 again i dont find any results from database.same thing happens to button b also .What cud b the pblm pls help.
Thank u so much in advance
Below is the class called after button 'a' is clicked
import net.rim.device.api.ui.*;
import net.rim.device.api.io.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.system.*;
import java.util.*;
import net.rim.device.api.database.Database;
import net.rim.device.api.database.DatabaseFactory;
import net.rim.device.api.database.Row;
import net.rim.device.api.database.Statement;
public final class KeywordFilter
{
private KeywordFilterField _keywordFilterField;
private WordList _wordList;
private Vector _words;
public KeywordFilter()
{
_words = getDataFromDatabase();
if(_words != null)
{
_wordList = new WordList(_words);
_keywordFilterField = new KeywordFilterField();
_keywordFilterField.setSourceList(_wordList, _wordList);
CustomKeywordField customSearchField = new CustomKeywordField();
_keywordFilterField.setKeywordField(customSearchField);
KeywordFilterScreen screen = new KeywordFilterScreen(this);
screen.setTitle(_keywordFilterField.getKeywordField());
screen.add(_keywordFilterField);
UiApplication ui = UiApplication.getUiApplication();
ui.pushScreen(screen);
}
else
{
UiApplication.getUiApplication().invokeLater(new Runnable()
{
public void run()
{
Dialog.alert("Error reading data file.");
System.exit(0);
}
});
}
}
KeywordFilterField getKeywordFilterField()
{
return _keywordFilterField;
}
private Vector getDataFromDatabase()
{
Vector words = new Vector();
Database d;
for(;;)
{
try
{
URI myURI=URI.create("file:///SDCard/Databases/MyTestDatabase.db");
d=DatabaseFactory.open(myURI);
Statement st=d.createStatement("SELECT eng,mal FROM Malayalam m,English e where e.Ecode=m.Mcode");
st.prepare();
net.rim.device.api.database.Cursor c=st.getCursor();
Row r;
while(c.next())
{
r=c.getRow();
String w=r.getString(0);
String meaning=r.getString(1);
words.addElement(new Word(w,meaning));
}}
catch ( Exception e )
{
System.out.println( e.getMessage() );
e.printStackTrace();
}
return words;
}
}
void addElementToList(Word w)
{
_wordList.addElement(w);
_keywordFilterField.updateList();
}
final static class CustomKeywordField extends BasicEditField
{
CustomKeywordField()
{
super(USE_ALL_WIDTH|NON_FOCUSABLE|NO_LEARNING|NO_NEWLINE);
setLabel("Search: ");
}
protected boolean keyChar(char ch, int status, int time)
{
switch(ch)
{
case Characters.ESCAPE:
if(super.getTextLength() > 0)
{
setText("");
return true;
}
}
return super.keyChar(ch, status, time);
}
protected void paint(Graphics graphics)
{
super.paint(graphics);
getFocusRect(new XYRect());
drawFocus(graphics, true);
}
}
}
import net.rim.device.api.ui.*;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;
import net.rim.device.api.system.*;
final class KeywordFilterScreen extends MainScreen
{
private KeywordFilter _app;
private KeywordFilterField _keywordFilterField;
public KeywordFilterScreen(KeywordFilter app)
{
_app = app;
_keywordFilterField = _app.getKeywordFilterField();
}
protected boolean keyChar(char key, int status, int time)
{
if (key == Characters.ENTER)
{
displayInfoScreen();
return true;
}
return super.keyChar(key, status, time);
}
public boolean invokeAction(int action)
{
switch(action)
{
case ACTION_INVOKE:
displayInfoScreen();
return true;
}
return super.invokeAction(action);
}
private void displayInfoScreen()
{
Word w = (Word)_keywordFilterField.getSelectedElement();
if(w != null)
{
InfoScreen infoScreen = new InfoScreen(w);
UiApplication ui = UiApplication.getUiApplication();
ui.pushScreen(infoScreen);
ui.popScreen(this);
}
}
private final static class InfoScreen extends MainScreen
{
InfoScreen(Word w)
{
setTitle(w.toString());
BasicEditField popField = new BasicEditField(":",w.getMeaning(),20,Field.NON_FOCUSABLE);
add(popField);
}
}
}
public class Word
{
private String _word;
private String _meaning;
public Word(String word, String meaning)
{
_word = word;
_meaning = meaning;
}
String getMeaning()
{
return _meaning;
}
public String toString()
{
return _word;
}
}
import net.rim.device.api.ui.component .*;
import net.rim.device.api.collection.util.*;
import net.rim.device.api.util.*;
import java.util.*;
public class WordList extends SortedReadableList implements KeywordProvider
{
public WordList(Vector words)
{
super(new WordListComparator());
loadFrom(words.elements());
}
void addElement(Object element)
{
doAdd(element);
}
public String[] getKeywords( Object element )
{
if(element instanceof Word )
{
return StringUtilities.stringToWords(element.toString());
}
return null;
}
final static class WordListComparator implements Comparator
{
public int compare(Object o1, Object o2)
{
if (o1 == null || o2 == null)
throw new IllegalArgumentException("Cannot compare null words");
return o1.toString().compareTo(o2.toString());
}
}
}
add st.close(); and d.close() after accessing db in private Vector getDataFromDatabase() method just before closing the try block
I want to make my application Blackberry in different languages. That mean I use english as default language and then when the user select other language, all the items and all the application will be with the other language. I use this code and I put the file Local.rrc and .rrh in the same package. I obtain nothing in my screen just white screen. Can any one help me ?
package mypackage;
import net.rim.device.api.ui.MenuItem;
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.*;
import net.rim.device.api.ui.container.*;
import net.rim.device.api.i18n.*;
public class Local extends UiApplication {
public static void main(String[] args) {
Local theApp = new Local();
theApp.enterEventDispatcher();
}
public Local() {
pushScreen(new LocalScreen());
}
}
final class LocalScreen extends MainScreen implements LocalDemoResource {
private static ResourceBundle res =
ResourceBundle.getBundle(BUNDLE_ID, BUNDLE_NAME);
LabelField title;
RichTextField rtf;
public LocalScreen() {
super();
title = new LabelField(res.getString(FIELD_TITLE),LabelField.ELLIPSIS| LabelField.USE_ALL_WIDTH);
setTitle(title);
rtf = new RichTextField(res.getString(MESSAGE));
add(rtf); }
public void HelloWorldScreen()
{
LabelField title = new LabelField("HelloWorld Sample",
LabelField.ELLIPSIS | LabelField.USE_ALL_WIDTH);
setTitle(title);
add(new RichTextField("Hello World!"));
}
public boolean onClose() {
Dialog.alert(res.getString(GOODBYE));
System.exit(0);
return true;
}
protected void makeMenu(Menu menu, int instance) {
menu.add(_english);
menu.add(_french);
menu.add(_spanish);
menu.add(_close);
}
private MenuItem _close = new MenuItem(res.getString(CLOSE), 110, 10) {
public void run() {
onClose();
}
};
private MenuItem _english = new MenuItem(res.getString(ENGLISH), 110, 10)
{
public void run() {
Locale.setDefault (Locale.get(Locale.LOCALE_en, null));
refresh();
}
};
private MenuItem _french = new MenuItem(res.getString(FRENCH), 110, 10) {
public void run() {
Locale.setDefault (Locale.get(Locale.LOCALE_fr, null));
refresh();
}
};
private MenuItem _spanish = new MenuItem(res.getString(SPANISH), 110, 10)
{
public void run() {
Locale.setDefault (Locale.get(Locale.LOCALE_es, null));
refresh();
}
};
private void refresh() {
title.setText(res.getString(FIELD_TITLE));
deleteAll();
rtf = new RichTextField(res.getString(MESSAGE));
add(rtf);
_english.setText(res.getString(ENGLISH));
_french.setText(res.getString(FRENCH));
_spanish.setText(res.getString(SPANISH));
_close.setText(res.getString(CLOSE));
}
}
There is an example import--->import blackberry samples---->LocalizationDemo explain how to use multilang in application blackberry