I want to know the object that was selected in the ListBox in Gwt.
The "bookNames" is a Map.
I want to know which cell in the ListBox was chosen by user and use it.
ListBox books = new ListBox();
final ListBox chapters = new ListBox();
for(i=0;i<bookNamesString.length;i++) // put books map into listbox (Map Starts from 1)
books.addItem(bookNames.get(i+1));
books.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent event) {
int i;
for(i=0;i<bookChapters.length;i++)
{
chapters.addItem("Chapter" + (i+1));
}
}
});
You can do:
String selectedChapter = bookNames.get(chapters.getSelectedIndex() - 1);
Related
Here , setIdList is list of student ids. I want to add these ids into table.
The ids are set in dragSetData() method.
I am able to access the list of ids by dropping into table. But it is adding at last of table.
I want it to add this list in between any row selected by mouse pointer.
Drag code...
private void addDragSupport()
{
int operations = DND.DROP_COPY | DND.DROP_MOVE;
Transfer[] transferTypes = new Transfer[] { TextTransfer.getInstance() };
viewer.addDragSupport(operations, transferTypes, new DragSourceListener()
{
#Override
public void dragStart(DragSourceEvent event) {
event.doit = false;
if (null != myVariable) {
if (myVariable instanceof StudentDetails) {
event.doit = true;
}
}
}
#Override
public void dragSetData(DragSourceEvent event) {
event.data = setIdList;
}
#Override
public void dragFinished(DragSourceEvent event) {
}
});
}
I tried below in drop code
IStructuredSelection structuredSelection = this.getStructuredSelection();
List<StudentDetails> studentDetailList = structuredSelection.toList();
But it is giving me the selected row. I want the pointer selected by mouse.
Considering you are using table viewer.
In drop handler :
1) Get the model object from TableViewer : tableViewer.getInput()
2) From dropTarget object find the object location where you want to add dropped object.
Then insert new object in the model at that location and refresh the tableviewer
I need to add items dynamically on click of listbox in Gwt . Which handler do I need to use?
Later I will be able to use addChangeHandler once items are added to listbox.
If i use click handler to add items to listbox, items are added to listbox. But on click of listbox, listbox items are not listed. Listbox closes immediately on click of it.
How to resolve this issue
Here is a simple code to demonstrate how to add items to the ListBox.
You need to understand some things first:
ClickEvent is fired whenever you click on the ListBox: first when you click to show the list and second when you click to select an item;
ChangeEvent is fired when you change the selected item - you can not use it to track the change of item list itself;
public class ListBoxTest implements EntryPoint {
private TextArea log = new TextArea();
private ListBox listBox = new ListBox();
private int i;
#Override
public void onModuleLoad() {
for(int j = 0; j < 5; j++)
listBox.addItem("item " + i++);
listBox.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent event) {
log(event.toDebugString());
for(int j = 0; j < 5; j++)
listBox.addItem("item " + i++);
}
});
listBox.addChangeHandler(new ChangeHandler() {
#Override
public void onChange(ChangeEvent event) {
log(event.toDebugString());
}
});
RootPanel.get().add(listBox);
RootPanel.get().add(log);
}
private void log(String text) {
String logText = log.getText();
if(!logText.isEmpty())
logText+= "\n";
logText+= text;
log.setText(logText);
}
}
Hello I have a Contact class with informations which i show in a CellTable.
The CellTable has a DataListProvider, MultiSelectionModel and KeyProvider
which checks the id of the Contact.
DataListProvider and CellTable have the same KeyProvider.
if i only select/deselect the items in the CellTable and show them in a TextBox ists working fine. But the when i change the value of the Contact item in the TextBox(Contact instance) and try to deselect the item the selectionmodel says its still selected?
I tried with clear() but its still selected!
GWT 2.5 / FireFox
ProvidesKey<Contact> keyProvider = new ProvidesKey<Contact>(){
#Override
public Object getKey(Contact item) {
return item.getIdContact();
}
};
public MyCellTable(boolean canLoad, Integer pagesize, ProvidesKey<T> keyProvider) {
super(-1, resource, keyProvider);
selectionModel = new MultiSelectionModel<T>();
selectionModel .addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
#Override
public void onSelectionChange(SelectionChangeEvent event) {
selectionChange();
}
});
dataProvider = new ListDataProvider<T>(keyProvider);
dataProvider.addDataDisplay(this);
}
in the selection event i call
protected void selectionChange(){
Contact c = grid.getGrid().getSelectedItem();
if(c != null){
cpForm.enable();
cpForm.clear();
form.bind(c); // Formular which updates the selected instance
cpForm.add(form);
}else{
cpForm.disable(noseletionText);
}
}
i have no ValueUpdater
when i select an item i generate a formular and if i change something i call:
#Override
public void save() {
super.save();
ContactServiceStore.get().updateContact(manager.getBean(),
new MyAsyncCallback<Void>() {
#Override
public void onSuccess(Void result) {
onchange();
}
});
}
i if call the method without changes on the contact its still working and i can deselect but when i change the name or something else i cant select other items or deselect the current item!
You're not actually using your ProvidesKeys in your MultiSelectionModel. You need to create your MultiSelectionModel like so:
MultiSelectionModel<T> selectionModel = new MultiSelectionModel<T>(keyProvider);
If you don't supply the MultiSelectionModel with a ProvidesKey it will use the actual object as a key.
Make sure you also add the MultiSelectionModel to the table:
cellTable.setSelectionModel(selectionModel);
The reason selectionModel.clear() wasn't working was because selectionModel was not set to the table.
I am trying to add a Link in my cell table (I just want the item to be underlined and mouse symbol change on hover)
and on click I just want to give a window Alert .
for that i have tried these Options : ( but no luck )
1)
final Hyperlink hyp = new Hyperlink("test", "test");
Column<EmployerJobs, Hyperlink> test = new Column<EmployerJobs, Hyperlink>(new HyperLinkCell())
{
#Override
public Hyperlink getValue(EmployerJobs object)
{
return hyp;
}
};
Problem with option 1 is , it takes me to navigation page "test", whereas I dont want to go any other page i just want a window alert.
2)
Column<EmployerJobs, SafeHtml> test = new Column<EmployerJobs, SafeHtml>(new SafeHtmlCell())
{
#Override
public SafeHtml getValue(EmployerJobs object)
{
SafeHtmlBuilder sb = new SafeHtmlBuilder();
sb.appendEscaped("test");
return sb.toSafeHtml();
}
};
problem with option 2 is I dont know what exactly to return here and its not getting underlined.
3) at last i am trying to add anchor in my celltable with a compositecell(as ideally i want three different anchors in my ONE cell)
final Anchor anc = new Anchor();
ArrayList list = new ArrayList();
list.add(anc);
CompositeCell ancCell = new CompositeCell(list);
Column testColumn1 = new Column<EmployerJobs, Anchor>(ancCell) {
#Override
public Anchor getValue(EmployerJobs object) {
return anc;
}
};
Option 3 is giving some exception .
If you can help me get working any of the above option, I'll be grateful
Thanks
You are doing it totally wrong. You need to use ActionCell for stuff like this or create your own cell. Example code:
ActionCell.Delegate<String> delegate = new ActionCell.Delegate<String>(){
public void execute(String value) { //this method will be executed as soon as someone clicks the cell
Window.alert(value);
}
};
ActionCell<String> cell = new ActionCell<String>(safeHtmlTitle,delegate){
#Override
public void render(com.google.gwt.cell.client.Cell.Context context, //we need to render link instead of default button
String value, SafeHtmlBuilder sb) {
sb.appendHtmlConstant("<a href='#'>");
sb.appendEscaped(value);
sb.appendHtmlConstant("</a>");
}
};
Column testColumn1 = new Column<EmployerJobs, String>(cell) {
#Override
public String getValue(EmployerJobs object) {
//we have to return a value which will be passed into the actioncell
return object.name;
}
};
I recommend to read official documentation for Cell Widgets, since it is pretty much everything what you need to know about cell widgets.
I'm trying to set the selected records of a ListGrid table object in SmartGWT, but I can't find any way of doing it. I know there's a getSelectedRecords() function, but no matching setSelectedRecords(). I tried to see if set/getSelectedState() would work, but GWT complains about needing a primary key and a DataSource object. Is there any way to set the selection of a ListGrid?
For this you can use one of the selectRecords() methods, like so:
public void onModuleLoad()
{
VLayout main = new VLayout();
final ListGrid grid = new ListGrid();
grid.setHeight(500);
grid.setWidth(400);
grid.setFields(new ListGridField("name", "Name"));
grid.setData(createRecords());
final IButton button = new IButton("Select some");
button.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event)
{
grid.selectRecords(new int[]{2, 3}); //This will select index 2 and 3
}
});
main.addMember(grid);
main.addMember(button);
RootPanel.get().add(main);
}
private ListGridRecord[] createRecords()
{
return new ListGridRecord[]{
createRecord("monkey"),
createRecord("banana"),
createRecord("orange"),
createRecord("sun")
};
}
private ListGridRecord createRecord(String name)
{
ListGridRecord record = new ListGridRecord();
record.setAttribute("name", name);
return record;
}