I am stuck in one of the scenerio. Based on input text field value i click button to display result in tableviewer. Below is the code,
btnSearch.addSelectionListener(new SelectionAdapter() {
#Override
public void widgetSelected(SelectionEvent e) {
String plant=text_workplace.getText();
IStructuredSelection selection = (IStructuredSelection) m_workplaceViewer
.getSelection();
workplaceDetail = (WorkplaceDetail) selection.getFirstElement();
if (plant!=""){
workplaceDetail= workplaceDaoImpl.getWorkplaceDetailsSearchByPlant(plant);
}
m_workplaceViewer.setInput(workplaceDetail);
m_workplaceViewer.refresh();
m_bindingContext.updateModels();
}
});
I am able to get result of query fired on button click in console, but i don get result in table viewer, instead get below exception
org.eclipse.core.runtime.AssertionFailedException: assertion failed: This content provider only works with input of type IObservableList
It tells you what the error is: you are calling
m_workplaceViewer.setInput(workplaceDetail);
workplaceDetail isn't an IObservableList, and you are using a content provider which requires IObservableList input. So you can either change your content provider or create an observable list from workplaceDetail.
Related
I have a search page that contains a table that gets populated with search results after the user presses the search button. The page object wraps the rows of the search results table in a custom HtmlElement class.
I'm getting a stale element exception when accessing the results table - as you'd expect because it was just refreshed by an ajax request.
I've worked around it by returning a new instance of the page object after performing the search but I'd rather just recreate the search results field. Is there any way to do this?
Example:
#FindBy(css = "[data-viewid='Table1'] .dojoxGridRow")
List<ActivityPerformanceRow> results;
// ...
public void search() {
search.click()
waitForAjaxToComplete();
// If it was a standard WebElement list I'd do something like this:
results = driver.findElements(By.cssSelector(
"[data-viewid='Table1'] .dojoxGridRow"));
}
After a bit of playing around I came up with this solution - it works well but doesn't deal with HtmlElement name property. Given I don't use it that I'm aware of I'm ignoring it for now...
public <T extends HtmlElement> List<T> findElements(Class<T> elementClass, By by) {
List<T> elements = new LinkedList<T>();
for (WebElement element : driver.findElements(by)) {
elements.add(HtmlElementLoader.createHtmlElement(elementClass, element, null));
}
return elements;
}
I want to create input forms which validate user input and prevent the model from being saved with invalid data. I have been using databinding which works up to a point but my implementation is not as intuitive as I would like.
Imagine an input which contains '123' and the value must not be empty. The user deletes the characters one by one until empty. The databinding validator shows an error decoration.
However, if the user saves the form and reloads it, then a '1' is displayed in the field - i.e. the last valid input. The databinding does not transmit the invalid value into the model.
I have a ChangeListener but this is called before the databinding so at that point the invalid state has not been detected.
I would like the error to be displayed in the UI but the model remains valid (this is already so). Also, for as long as the UI contains errors, it should not be possible to save the model.
/**
* Bind a text control to a property in the view model
**/
protected Binding bindText(DataBindingContext ctx, Control control,
Object viewModel, String property, IValidator validator)
{
IObservableValue value = WidgetProperties.text(SWT.Modify).observe(
control);
IObservableValue modelValue = BeanProperties.value(
viewModel.getClass(), property).observe(viewModel);
Binding binding = ctx.bindValue(value, modelValue, getStrategy(validator), null);
binding.getTarget().addChangeListener(listener);
ControlDecorationSupport.create(binding, SWT.TOP | SWT.LEFT);
return binding;
}
private UpdateValueStrategy getStrategy(IValidator validator)
{
if (validator == null)
return null;
UpdateValueStrategy strategy = new UpdateValueStrategy();
strategy.setBeforeSetValidator(validator);
return strategy;
}
private IChangeListener listener = new IChangeListener()
{
#Override
public void handleChange(ChangeEvent event)
{
// notify all form listeners that something has changed
}
};
/**
* Called by form owner to check if the form contains valid data e.g. before saving
**/
public boolean isValid()
{
System.out.println("isValid");
for (Object o : getDataContext().getValidationStatusProviders())
{
ValidationStatusProvider vsp = (ValidationStatusProvider) o;
IStatus status = (IStatus)vsp.getValidationStatus()
.getValue();
if (status.matches(IStatus.ERROR))
return false;
}
return true;
}
Your best bet is to steer clear of ChangeListeners - as you've discovered, their order of execution is either undefined or just not helpful in this case.
Instead, you want to stick with the 'observable' as opposed to 'listener' model for as long as possible. As already mentioned, create an AggregateValidationStatus to listen to the overall state of the DataBindingContext, which has a similar effect to your existing code.
Then you can either listen directly to that (as below) to affect the save ability, or you could even bind it to another bean.
IObservableValue statusValue = new AggregateValidationStatus(dbc, AggregateValidationStatus. MAX_SEVERITY);
statusValue.addListener(new IValueChangeListener() {
handleValueChange(ValueChangeEvent event) {
// change ability to save here...
}
});
You can use AggregateValidationStatus to observe the aggregate validation status:
IObservableValue value = new AggregateValidationStatus(bindContext.getBindings(),
AggregateValidationStatus.MAX_SEVERITY);
You can bind this to something which accepts an IStatus parameter and it will be called each time the validation status changes.
I want to add a table in database and want to add a column and save information and retrieve it on another button clicked, if table already exists it would just insert information following is the code that is used by me but giving error.
Button insert_info=(Button)findViewById(R.id.button1);
insert_info.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
SQLiteDatabase db;
try
{
final EditText txt_field1=(EditText)findViewById(R.id.editText1);
String Per_Name=txt_field1.getText().toString();
db=openOrCreateDatabase("sez.db",SQLiteDatabase.CREATE_IF_NECESSARY,null);
String Query_createTable="CREATE TABLE sezInformation(Name VARCHAR(100))";
String Query_insert="insert into sezInformation(Name) values("+Per_Name+")";
db.execSQL(Query_insert);
}
catch(Exception e)
{
Toast.makeText(WelomePerson.this, "ERROR"+e.toString(), Toast.LENGTH_LONG).show();
}
}
});
Whenever I enter the value means khan or any other in layout Edittext field and click on button it shows
No such column :khan while insert into sezInformation (Name) values(khan)
Please also tell me how to retrieve the same saved data in a textview.
Use CREATE TABLE IF NOT EXISTS instead of CREATE TABLE.
Also be sure to use 2 distinct execSQL() commands (one to create the table and one to insert), or it won't work, since you can't execute multiple commands at once.
In SQL, string literals should be in 'single quotes'. Otherwise they are taken as identifiers such as column names.
Even better, use parameters:
db.execSQL("insert into sezInformation(Name) values(?)",
new Object[] { Per_Name });
I have a rather complex form in the way that the number of form fields is flexibel. In short, the model object is a TLabel (TranslationLabel) that contains a Map of values (translations). Language here is an enum so the idea is that the number of fields (text areas) for which a translation is given depends on the values in this enum.
This is my form (simplified):
public class TranslationEditForm extends Form {
private final static List<Language> LANGUAGES = newArrayList(Language.values());
public TranslationEditForm(String id, final TranslationLabelView label) {
super(id, new CompoundPropertyModel<TranslationLabelView>(label));
ListView<Language> textAreas = new ListView<Language>("translationRepeater", LANGUAGES) {
#Override
protected void populateItem(final ListItem<Language> itemLang) {
//loop through the languages and create 1 textarea per language
itemLang.add(new Label("language", itemLang.getModelObject().toString()));
Model<String> textModel = new Model<String>() {
#Override
public String getObject() {
//return the value for current language
return label.getValue(itemLang.getModelObject());
}
#Override
public void setObject(String object) {
//set the value for current language
label.getTranslations().put(itemLang.getModelObject(), object);
}
};
itemLang.add(new TextArea<String>("value", textModel).setRequired(true));
}
};
//add the repeater containing a textarea per language to the form
this.add(textAreas);
}
}
Now, it works fine, 1 text area is created per language and its value is also set nicely; even more when changed the model gets updated as intended.
If you submit the form after emptying a text area (so originally there was a value) then of course there is a validation error (required). Normal (wicket) behaviour would be that the invalid field is still empty but for some reason the original value is reset and I don't understand why.
If I override onError like this:
#Override
protected void onError() {
this.updateFormComponentModels();
}
then it is fine, the value of the field is set to the submitted value (empty) instead of the original value.
Any idea what is causing this? What is wicket failing to do because the way I've set up the form (because with a simple form/model this is working fine as are the wicket examples)?
Posted as answer, so the question can be marked as solved:
ListView does recreate all its items at render time. This means that the validation will be broken. Have a look at API doc of the ListView
Calling setReuseItems() on the ListView solves this.
Regards,
Bert
Does anyone know for an example of GWT's CellTable using RequestFactory and that table is being edited? I would like to list objects in a table (each row is one object and each column is one property), be able to easily add new objects and edit. I know for Google's DynaTableRf example, but that one doesn't edit.
I searched Google and stackoverflow but wasn't able to find one. I got a bit confused with RF's context and than people also mentioned some "driver".
To demonstrate where I currently arrived, I attach code for one column:
// Create name column.
Column<PersonProxy, String> nameColumn = new Column<PersonProxy, String>(
new EditTextCell()) {
#Override
public String getValue(PersonProxy person) {
String ret = person.getName();
return ret != null ? ret : "";
}
};
nameColumn.setFieldUpdater(new FieldUpdater<PersonProxy, String>() {
#Override
public void update(int index, PersonProxy object, String value) {
PersonRequest req = FaceOrgFactory.getInstance().requestFactory().personRequest();
PersonProxy eObject = req.edit(object);
eObject.setName(value);
req.persist().using(eObject).fire();
}
});
and my code for data provider:
AsyncDataProvider<PersonProxy> personDataProvider = new AsyncDataProvider<PersonProxy>() {
#Override
protected void onRangeChanged(HasData<PersonProxy> display) {
final Range range = display.getVisibleRange();
fetch(range.getStart());
}
};
personDataProvider.addDataDisplay(personTable);
...
private void fetch(final int start) {
lastFetch = start;
requestFactory.personRequest().getPeople(start, numRows).fire(new Receiver<List<PersonProxy>>() {
#Override
public void onSuccess(List<PersonProxy> response) {
if (lastFetch != start){
return;
}
int responses = response.size();
if (start >= (personTable.getRowCount()-numRows)){
PersonProxy newP = requestFactory.personRequest().create(PersonProxy.class);
response.add(newP);
responses++;
}
personTable.setRowData(start, response);
personPager.setPageStart(start);
}
});
requestFactory.personRequest().countPersons().fire(new Receiver<Integer>() {
#Override
public void onSuccess(Integer response) {
personTable.setRowCount(response+1, true);
}
});
}
I try to insert last object a new empty object. And when user would fill it, I'd insert new one after it. But the code is not working. I says that user is "attempting" to edit a object previously edited by another RequestContext.
Dilemmas:
* am I creating too many context'es?
* how to properly insert new object into celltable, created on the client side?
* on fieldUpdater when I get an editable object - should I insert it back to table or forget about it?
Thanks for any help.
am I creating too many context'es?
Yes.
You should have one context per HTTP request (per fire()), and a context that is not fire()d is useless (only do that if you/the user change your/his mind and don't want to, e.g., save your/his changes).
You actually have only one context to remove here (see below).
Note that your approach of saving on each field change can lead to "race conditions", because a proxy can be edit()ed by at most one context at a time, and it remains attached to a context until the server responds (and once a context is fired, the proxy is frozen –read-only– also until the server responds).
(this is not true in all cases: when onConstraintViolation is called, the context and its proxies are unfrozen so you can "fix" the constraint violations and fire the context again; this should be safe because validation is done on the server-side before any service method is called).
how to properly insert new object into celltable, created on the client side?
Your code looks OK, except that you should create your proxy in the same context as the one you'll use to persist it.
on fieldUpdater when I get an editable object - should I insert it back to table or forget about it?
I'm not 100% certain but I think you should refresh the table (something like setRowData(index, Collections.singletonList(object)))
BTW, the driver people mention is probably the RequestFactoryEditorDriver from the Editor framework. It won't help you here (quite the contrary actually).