I am currently working on a tool which edits data dynamically in a JTable. I want to hide the targeted row whenever a button is clicked. Right now I am using RowFilter. Whenever the button isClicked, a new filter is created:
RowFilter<MyTableModel, Object> rowFilter = null;
try {
rowFilter = RowFilter.notFilter(RowFilter.regexFilter(((String)dataTable.getValueAt(dataTable.getSelectedRow(), 0)),0));
} catch (java.util.regex.PatternSyntaxException e) {
return;
}
sorter.setRowFilter(rowFilter);
This only works for one element each time the button is clicked. I want to stay them hidden, so you can continously hide elemtens in the table. It is important to mention that I do not want to delete the rows, just hide them.
I hope someone has an easy answer for this, looking for quite a while now.
This method sorter.setRowFilter(rowFilter); is replacing the filter every time you "add" a new filter. So, it's "forgetting" the old rules. What you have to do is edit the existing filter to include the new rules for filtering.
Check out the documentation for more details.
In any case, I extracted a part of the documentation which you should try to implement.
From RowFilter Javadoc:
Subclasses must override the include method to indicate whether the
entry should be shown in the view. The Entry argument can be used to
obtain the values in each of the columns in that entry. The following
example shows an include method that allows only entries containing
one or more values starting with the string "a":
RowFilter<Object,Object> startsWithAFilter = new RowFilter<Object,Object>() {
public boolean include(Entry<? extends Object, ? extends Object> entry) {
for (int i = entry.getValueCount() - 1; i >= 0; i--) {
if (entry.getStringValue(i).startsWith("a")) {
// The value starts with "a", include it
return true;
}
}
// None of the columns start with "a"; return false so that this
// entry is not shown
return false;
}
};
This means that the include() method is going to return true or false depending if an item should be shown.
Therefore, you should only set the RowFilter once, and reimplment the include() method to match all the rules you currently have set upon your view.
Uncertain how best to word the title, but here's the gist.
The goal is to retrieve all selected rows of a table and manipulate them. The problem I'm bumping into is that the RowSetIterator doesn't get populated the first time the method within my backing bean is invoked. It does get populated when invoked a second time.
How do I go about getting it to work properly on the first invocation?
Doubtless I'm not being perfectly clear, please let me know if you require any additional information. Here's a snippet of the bean method:
public String deleteSelectedQueries()
{
JSFUtils.addInformationMessage("Delete");
RowKeySet selectedQueries =
getSavedQueriesByUserTable().getSelectedRowKeys();
Iterator selectedQueriesIter = selectedQueries.iterator();
DCBindingContainer bindings =
(DCBindingContainer) BindingContext.getCurrent().getCurrentBindingsEntry();
DCIteratorBinding savedQueriesByUserIter =
bindings.findIteratorBinding("SavedQueriesByUserROVOIterator");
RowSetIterator savedQueriesByUserRowSetIterator =
savedQueriesByUserIter.getRowSetIterator();
while (selectedQueriesIter.hasNext())
{
Key key = (Key) ((List) selectedQueriesIter.next()).get(0);
Row currentRow = savedQueriesByUserRowSetIterator.getRow(key);
System.out.println(currentRow.getAttribute("QueryName"));
}
return null;
}
}
Any ideas?
Thanks!
This code looks good to me.
The problem may come from <af:table> tag, make sure you have these tags removed:
selectedRowKeys="#{bindings.SavedQueriesByUserROVO.collectionModel.selectedRow}"
selectionListener="#{bindings.SavedQueriesByUserROVO.collectionModel.makeCurrent}"
I have a Table whose DataSource is set to a IndexedContainer. I also have multiple selection enabled on my Table. The Question is, how do I get all the selected values.. as an array perhaps?
My IndexedContainer:
private void populateAnalyteTable () {
Analyte[] analytes = Analyte.getAnalytes();
for (Analyte analyte : analytes) {
Object id = ic_analytes.addItem();
ic_analytes.getContainerProperty(id, "ID").setValue(analyte.getId());
ic_analytes.getContainerProperty(id, "Analyte Name").setValue(analyte.getAnalyteName());
}
// Bind indexed container to table
tbl_analytes.setContainerDataSource(ic_analytes);
}
What I'm eventually trying to get is an array of Analyte objects
Why do you want to use IndexContainer? Why don't you use BeanItemCotainer?
Please find the snippet of code below
table.setMultiSelect(true);
BeanItemContainer<Analyte> container = new BeanItemContainer<Analyte>(Analyte.class);
container.addAll(Arrays.asList(Analyte.getAnalytes()));
table.setContainerDatasource(container);
// Add some Properties of Analyte class that you want to be shown to user
table.setVisibleColumns(new Object[]{"ID","Analyte Name"});
//User selects Multiple Values, mind you this is an Unmodifiable Collection
Set<Analyte> selectedValues = (Set<Analyte>)table.getValue();
Please let me know in case it doesn't solve the issue
The vaadin objects supporting MultiSelect all return a set of the selected items.
https://www.vaadin.com/api/com/vaadin/ui/AbstractSelect.html#getValue%28%29
The drawback of this, if you need the selected items in "real" order (as displayed onscreen)
you will then have to find them from the Set to the Container
Just add your object as the Item-ID, like luuksen already propesed. Just change the initialisation of yout IndexedContainer to:
for (Analyte analyte : analytes) {
Object id = ic_analytes.addItem(analyte);
ic_analytes.getContainerProperty(id, "ID").setValue(analyte.getId());
ic_analytes.getContainerProperty(id, "Analyte Name").setValue(analyte.getAnalyteName());
}
table.getValue() is what you are looking for.
This method gives you an Object (if table is single select) or a Set<Object> (if multiselect) of the ID(s) of selected item(s). Runtime type depends on runtime id type, but if you do not need the value you can go around with Object .
If you are looking for Analytes as an array you can do
#SuppressWarnings("unchecked")
Set<Object> selectedIds = (Set<Object>) tbl_analytes.getValue();
List<Analyte> listAnalytes = new ArrayList<Analyte>();
for (Object id : selectedIds) {
listAnalytes.get(tbl_analytes.getItem(id));
}
listAnalytes.toArray();
Note that this approach works with every standard container you may use in Vaadin.
Regards!
EDIT: actually what .getValue() returns depends on the used container. In most of the cases it's the ID.
This is my class reponsible for new item entries, and from the start it has been a complete nightmare, I can't seem to resolve the issues I am facing which are:
setStock(float) in Item cannot be applied to ()
Item entry:
private void writeItemRecord()
{
// Check to see if we can connect to database table
if ( DataBaseHandler.makeConnectionToitemDB() == -1)
{
JOptionPane.showMessageDialog (frame, "Unable to connect to database table (Item)");
}
else // Ok, so first read data from the text fields
{
// Read data from form and store data
String Itemname = ItemnameTxtField.getText();
String Itemcode = ItemcodeTxtField.getText();
String Description = DescriptionTxtField.getText();
String Unitprice = UnitpriceTxtField.getText();
String Style = StyleTxtField.getText();
String Finish = FinishTxtField.getText();
String Stock = StockTxtField.getText();
// Convert priceStr to a float
Float fvar = Float.valueOf(Unitprice);
float price = fvar.floatValue();
Float svar = Float.valueOf(Stock);
float stock = svar.floatValue();
// Create a Item oject
Item Item = new Item();
// Set the attributes for the Item object
Item.setItemname (Itemname);
Item.setItemcode (Itemcode);
Item.setDescription (Description);
Item.setUnitprice (price);
Item.setStock(stock);
Item.setStyle(Style);
Item.setFinish(Finish);
// Write Item record. Method writeToItemTable() returns
// 0 of OK writing record, -1 if there is a problem. I store
// the returned value in a variable called error.
int error = DataBaseHandler.writeToItemTable(Item.getItemname(),
Item.getItemcode(),
Item.getDescription(),
Item.getUnitprice(),
Item.setStock(),
Item.setStyle(Style),
Item.setFinish(Finish),
Item.setSuppliercode(Suppliercode),
Item.setSuppliername(Suppliername),
Item.setAddress(Address)
);
// Check if there is a problem writing the record, in
// which case error will contain -1
if (error == -1)
{
JOptionPane.showMessageDialog (frame, "Problem writing record to Item Table");
}
// Clear the form - actual method is coded below
clearForm();
// Close database connection. Report an error message
// if there is a problem.
if ( DataBaseHandler.closeConnection() == -1 )
{
JOptionPane.showMessageDialog (frame, "Problem closing data base conection");
}
}
} // End
Any help is much appreciated!
And item extracts:
public void setStock(float StockIn)
{
Stock = StockIn;
}
public float getStock()
{
return Stock;
}
For starters, adhere to Java naming conventions. Nothing except class/interface names is allowed to use CamelCase. Use lowerCamelCase. As for your "problem", you wrote
Item.setStock(),
so obviously it's giving you the error. It is also giving you the exact line number of the error, something that would obviously have helped us to diagnose your problem.
Solution: use Item.getStock() (i suppose, it's hard to tell). Calling Item.setStock at that position (as an argument to a method call) is meaningless anyway, given that setStock is a void method.
Java compiler errors come with a line number - pay attention to it. This is your problem:
Item.setStock()
setStock() requires a parameter, you are trying to call it without one. Perhaps you meant getStock()? And I suspect that all the calls to set methods in the parameter list to writeToItemTable are also wrong, as those set methods will have void as return value, so you can't use them that way.
The setStock method looks like this:
public void setStock(float StockIn)
To call it, you need to pass a float as an argument. Somewhere in your code, you call the method, like this:
Item.setStock(),
The method needs to be called with the float argument, but instead it's called with none, hence you see a compilation error.
In this code:
int error = DataBaseHandler.writeToItemTable(Item.getItemname(),
Item.getItemcode(),
Item.getDescription(),
Item.getUnitprice(),
// Right here --> Item.setStock(),
Item.setStyle(Style),
Item.setFinish(Finish),
Item.setSuppliercode(Suppliercode),
Item.setSuppliername(Suppliername),
Item.setAddress(Address)
);
Notice that you're calling Item.setStock(), Item.setStyle(Style), etc. instead of Item.getStock(), Item.getStyle(), etc. This is probably the source of your problem - you're trying to call the setStock() method with no arguments, hence the error.
Hope this helps!
This line
// Create a Item oject
Item Item = new Item();
Is problematic. Not only is it bad style in Java to use uppercase names for variables, this particular instance results in a compile error. Also, you're calling setStock without a parameter. You need to fix that as well.
Here is your error:
int error = DataBaseHandler.writeToItemTable(Item.getItemname(),
Item.getItemcode(),
Item.getDescription(),
Item.getUnitprice(),
Item.setStock(), // <<< here! should be getStock()
Item.setStyle(Style),
Item.setFinish(Finish),
Item.setSuppliercode(Suppliercode),
Item.setSuppliername(Suppliername),
Item.setAddress(Address));
But again... consider naming/coding conventions.
The default behaviour in a JTable seems to be that if I reach the last row of a column and hit return, I am taken to the first row of the next column. Is there a way to avoid this? Please suggest a way that I could stay at the last row of the same column. I also want to avoid a situation where I am taken to the next column and then detect that and go back to the previous one, because I have some listeners associated with it.
Any help is appreciated.
to change any of the navigational behaviour, replace the default navigational actions with your own. Best by wrapping the defaults: conditionally either do the default or your custom stuff. Something like
Object key = table.getInputMap(JTable.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT)
.get(KeyStroke.getKeyStroke("ENTER"));
final Action action = table.getActionMap().get(key);
Action custom = new AbstractAction("wrap") {
#Override
public void actionPerformed(ActionEvent e) {
int row = table.getSelectionModel().getLeadSelectionIndex();
if (row == table.getRowCount() - 1) {
// do custom stuff
// return if default shouldn't happen or call default after
return;
}
action.actionPerformed(e);
}
};
table.getActionMap().put(key, custom);