I'm using the following
org.eclipse.jface.viewers.CheckboxCellEditor.CheckboxCellEditor(Composite parent)
I'm creating a table viewer with cellEditors and doing the following
CellEditor[] editors = new CellEditor[columnNames.length];
editors[7] = new CheckboxCellEditor(table);
I have a CellModifier that has the following
public Object getValue(Object element, String property) {
Object result = null;
...
result = Boolean.valueOf(task.isDfRequested());
return result;
}
public void modify(Object element, String property, Object value) {
item.isSelected(((Boolean)value).booleanValue());
}
Finally I have a LabelProvider that has the following
public String getColumnText(Object element, int columnIndex) {
String result = "";
try {
result = Boolean.toString(item.isSelected());
} catch (Exception ex) { }
break;
However, in my UI instead of having a check box I have the word true or false && clicking it results in switching state to false or true. Any ideas on why I don't have a checkbox??
I've searched in the source code of CheckboxCellEditor class and in the constructor the control associated to the CellEditor is created in the createControl(Composite parent) method. This method is abstract in CellEditor class and it's implemented like this in CheckboxCellEditor:
protected Control createControl(Composite parent) {
return null;
}
So a control is not created, that's why you don't see the checkbox. In the documentation of the Class you can read:
Note that this implementation simply
fakes it and does does not create any
new controls. The mere activation of
this editor means that the value of
the check box is being toggled by the
end users; the listener method
applyEditorValue is immediately called
to signal the change.
I solved this using a ComboBoxCellEditor with yes and no items.
Regards.
Well, I have no idea how SWT works or what component you are even talking about.
But I do know that when using Swing you can have custom editors for a column in a JTable. If you don't tell the table the class of data for the column then the toString() method of the data is invoked. But if you tell the table that Boolean data is displayed in the column then the table will use the check box editor.
Sounds like a similiar symptom, but I don't know your particular solution.
What I've decided to do is to just implement a dirty hack others have been using.
Create two images of check boxes, one checked the other not checked. Switch the state between the two based on the boolean.
It's not perfect, but for now it gets the job done
Related
I'm writing a seating chart program using JavaFX. I have a table that keeps a list of students together that holds their name, grade, and whether they are present or absent (using a checkbox). I have a delete button that allows me to delete the students from the list. This works fine, however, whenever I delete the student object, the checkbox does not go along with it. I'm not sure what I would need to add to get that to work. Here is a snippet of the delete code. There are also two images below that show my problem. This is my first post so please let me know if I missed something. Please help! Thanks!
ObservableList<Student> items, sel;
items = currentTable.getItems();
sel = currentTable.getSelectionModel().getSelectedItems();
Student s = new Student("", "", 0, "");
for (Student p : sel) {
items.remove(p);
s = p;
}
Before Delete
After Delete
This has nothing to do with the delete or remove method. It has to do with what you did in TableColumn.setCellFactory().
To get the checkbox you shown, you should have used (in general) one of the two methods:
Overriding updateItem() in TableCell while setting Cell Factory
There is this empty parameter in updateItem() which indicates whether the row is empty or not. You need to use that to determine when not to show the checkbox.
column.setCellFactory(col -> {
return new TableCell<Foo, Boolean>() {
final CheckBox checkBox = new CheckBox();
#Override
public void updateItem(final Boolean selected, final boolean empty) {
super.updateItem(selected, empty);
if (!this.isEmpty()) {
setGraphic(checkBox);
setText("");
}
else {
setGraphic(null); // Remove checkbox if row is empty
setText("");
}
}
}
}
Using CheckBoxTableCell
JavaFX API has this convenient class CheckBoxTableCell that would do all these for you. Most people find this class hard to use because there are 2 things that you need to ensure to use it correctly:
The TableView that the column belongs to must be editable.
The TableColumn itself must be editable.
Example:
tableView.setEditable(true);
tableColumnSelected.setCellFactory(CheckBoxTableCell.forTableColumn(tableColumnSelected));
tableColumnSelected.setEditable(true);
As for whether which entry you want to be removed with the delete button, you just need to remove the correct items from the TableView.
In my project I have a table. When the user double clicks on the row, an editing dialog opens. On the opening this dialog I set values to fields, few of which are ChoiceBoxes. The type of ChoiceBox's field is a custom object, not a string.
The code that creates the ChoiceBox follows:
trade_point.setConverter(new TradePointConverter());
trade_point.setItems(FXCollections.observableArrayList(tradePointsService.getTradePoints()));
TradePoint currentTradePoint = tradePointsService.getTradePoint(typeOfPriceByTradePoint.getTradePoint());
trade_point.setValue(currentTradePoint);
Where trade_point is a choice box of TradePoint type. currentTradePoint is not null, when I look at trade_point's value equals currentTradePoint's value but in the dialog I see no value. Items are set correctly. in other case with same choice box filling everything is correct and here is not.
UPD: TradePointConverter class:
class TradePointConverter extends StringConverter<TradePoint>{
public TradePoint fromString(String name){
try {
List<TradePoint> tradePoints = tradePointsService.getTradePoints();
for (TradePoint tradePoint1: tradePoints){
if (tradePoint1.getName().equals(name)){
return tradePoint1;
}
}
}catch (SQLException e){
}
return null;
}
public String toString(TradePoint tradePoint1){
return tradePoint1.getName();
}
}
I am not sure if this converter is correct as far as converting from string by name is totally incorrect. I do not understand how to make it correctly visible to the user (to see the name of an object) and how to store its id to get the definite object at the same time. I can convert to string by getting an id but in this case user won't understand which object to choose.
trade_point is a ChoiceBox:
private ChoiceBox<TradePoint> trade_point = new ChoiceBox<TradePoint>();
This is my zul code:
<combobox id="digitalPublisherCombobox" value="#load(ivm.inventory.digitalPublisherName)"
onOK="#command('setDigitalPublisher', digitalPublisherBox = self)"
onSelect="#command('setDigitalPublisher', digitalPublisherBox = self)"
onChanging="#command('setupQuicksearchByEvent', searchlayout = event, prefix = 'PUB', tags = 'PublisherName, PublisherNameTranslit')"
mold="rounded" hflex="1" buttonVisible="false" autodrop="true">
<comboitem self="#{each=entry}" value="#{entry.key}" label="#{entry.value}"/>
</combobox>
And this is QuickSearch implementations:
#Command
public void setupQuicksearchByEvent(#BindingParam("searchlayout")Event event, #BindingParam("prefix") String prefix, #BindingParam("tags") String tags) throws WrongValueException, SearchException, IOException
{
if(event instanceof InputEvent)
{
InputEvent inputEvent = (InputEvent) event;
String inputText = inputEvent.getValue();
List<String> searchFields = Arrays.asList(tags.split(","));
ListModel model = new ListModelMap(ZKLogic.findDocsStartingWith(prefix, searchFields, "proxy", inputText), true);
ListModel subModel = ListModels.toListSubModel(model, Autocompleter.MAP_VALUE_CONTAINS_COMPARATOR, 10);
Combobox searchBox = (Combobox) event.getTarget();
searchBox.setModel(subModel);
searchBox.setItemRenderer(new ComboitemRenderer()
{
#Override
public void render( Comboitem item, Object data, int pos ) throws Exception
{
String publisherString = data.toString();
UID key = getUidFromPublisherString(publisherString);
int startIndex = publisherString.indexOf('=') + 1;
String publisher = publisherString.substring(startIndex);
item.setLabel(publisher);
item.setValue(key);
}
});
}
}
ZKLogic.findDocsStartingWith return map with UID-key and String-value.
With code above I achieved to get dropdown list when I switch to another window. I need to type something, then select another browser or notepad window - and comboitems will be displayed immediately.
So, my question still need answer, is there are any techniques to reproduce this windows switching in code? Or maybe I should do something with autocomplete, because I've got some ac working with preloaded lists, but this thing should return only 10 records from db, instead of all 70000 entries, every time when user type something in the field.
Edit 20/09/2013: Problem still exist. Rename question a bit, because thing that I need is to call render option by force in code. Is there is any way to do it? Code hasn't changed a lot, but print option in render method said, that method can miss two or more onChange events and suddenly render text for one variant.
Maybe you know another autocomplete options in zk framework where database participating? I'm ready to change implementation, if there is a guide with working implementation of it.
Ok I see two problems, you should solve first.
Setting the Renderer in every call of setupQuicksearchByEvent(...).
that is not logical, cos it is the same every time.
Add to the zul combobox tag something like
itemRenderer="#load(ivm.myRenderer)" ....
If you want just 10 items, do not let the db-request return more then 10.
If you use JPA klick here or for sql here or just google a bit.
After you fixed this two issues, we can exclude these as a reason of the unexpected behavior and fix it, if it is still present.
Edit
Ok, I have two possible ways to fix it.
Call Combobox#invalidate()
This schould force zk to rerender the Combobox, but could
lead to low performance and I would not prefer this.
Use Listbox with the select mold instead of Combobox.
To force the rerender, use Listbox#renderAll()
Try setting the selected item on your combobox or throw its related event
Solution is simple. Really. Nothing is better then brute-force, but I think I tried to avoid it and use it in despair.
#Command
public void setupQuicksearchByEvent(#BindingParam("searchlayout")Event event, #BindingParam("prefix") String prefix, #BindingParam("tags") String tags) throws WrongValueException, SearchException, IOException
{
if(event instanceof InputEvent)
{
InputEvent inputEvent = (InputEvent) event;
String inputText = inputEvent.getValue();
List<String> searchFields = Arrays.asList(tags.split(","));
Map<UID, String> publishers = ZKLogic.findDocsStartingWith(prefix, searchFields, "proxy", inputText);
Combobox searchBox = (Combobox) event.getTarget();
searchBox.getChildren().clear();
for (Map.Entry<UID, String > entry : publishers.entrySet())
{
Comboitem item = new Comboitem();
item.setLabel(entry.getValue());
item.setValue(entry.getKey());
searchBox.appendChild(item);
}
}
}
I am trying to allow my user to search through a table of information, dynamically hiding/showing results that contain the search. I have the hiding part down, and it works well, but I'm having trouble showing the table item again once the search criteria is changed.
Here is my hide code:
searchField.addModifyListener(new ModifyListener() {
#Override
public void modifyText(ModifyEvent arg0) {
modified = true;
for (int i = 0; i < table.getItems().length; i++) {
if (!(table.getItem(i).getText(2)
.contains(searchField.getText()))) {
table.getItem(i).dispose();
}
}
if ("".equals(searchField.getText())) {
modified = false;
//where I would want to un-hide items
}
}
});
Looking at your code, it seems you try to hide the item by calling dispose(). If you dispose a widget, it is gone for good. You cannot get it back.
If you want to unhide it again, will have to create a new item at the position of the previously hidden one with the same content.
Isn't it better to actually operate with some kind of a table model and JFace bindings, rather, then do it like that? And yes, disposing is not hiding. You should probably remove the item from the table.
You have probably to save the data from TableItem into collection before you call dispose. Then when you search again you could check that collection and if matches are found, then insert back into Table by creating new TableItem.
I'm writing a search & replace function in a kind of spreadsheet program. What I want is that if you search for a string, the program shows a table with the element that has been found.
So far so good, but I cannot get the element to obtain the focus, with the cursor in it so you can immediately start typing.
I'm using a customized JTable and also a customized TableCellEditor. The following tricks do not seem to work:
(within the customized TableCellEditor):
SwingUtilities.invokeLater(new Runnable() {
public void run() {
my_textfield.requestFocus();
}
});
or:
my_jtable.editCellAt(0, 3);
my_jtable.requestFocus();
or
my_jtable.getEditorComponent().requestFocusInWindow();
Am I missing something? Is there a good description (nice flow diagram) that shows how events take place? Or example code that might do something similar?
With some googling i found a forum thread : programmatically start editing a cell in a JTable answered with following idea:
(in a subclass of JTable)
editCellAt(row,column);
requestFocus();
DefaultCellEditor ed = (DefaultCellEditor)
getCellEditor(row,column);
ed.shouldSelectCell(new ListSelectionEvent(this,row,row,true));
Would it work?
Did you try the editcellat without the requestfocus ?
also make sure that you override/implemenet to return true
/**
* Returns true.
* #param anEvent an event object
* #return true
*/
public boolean shouldSelectCell(EventObject anEvent) {
return true;
}
Check if you have enabled selection on your custom table instance like below:
table.setColumnSelectionAllowed(true);
table.setRowSelectionAllowed(true);
With this being set, generally a call to table.editCellAt(row, col); starts editing. Example :
JTable myTable = new JTable(rows, cols);
myTable.setColumnSelectionAllowed(true);
myTable.setRowSelectionAllowed(true);
and somewhere else..where edit is needed,
boolean wasEditStarted = table.editCellAt(row, col);
if (wasEditStarted) {
table.changeSelection(row, col, false, false);
}