Hi i have been strugguling with this for a while. could you please suggest changes.
public class JobDetails extends Panel implements Serializable {
private static Logger LOGGER = Logger.getLogger(JobDetails.class);
public static final long serialVersionUID = 42L;
private List<Job> list;
#Override
protected void onInitialize() {
super.onInitialize();
}
public JobDetails(String id, final PageParameters params) {
super(id);
FeedbackPanel feedbackpanel = new FeedbackPanel("feedbackpanel");
add(feedbackpanel);
String JOBNUMBER = params.get("jobnumber").toString();
String OBJECTTYPE = params.get("objecttype").toString();
String OBJECTNUMBER = params.get("objectnumber").toString();
if (JOBNUMBER != null) {
LOGGER.info("JOBNUMBER != null");
list = Utils.retrieve(JOBNUMBER);
} else {
list = Utils.retrieve(OBJECTTYPE, OBJECTNUMBER);
}
DataView dataView = new DataView("jobs", new ListDataProvider(list)) {
#Override
public void onConfigure() {
super.onConfigure();
setVisible(getDataProvider().size() > 0);
}
#Override
protected void populateItem(final Item item) {
final Job job = (Job) item.getModelObject();
Link plink = new Link("parentJobLink") {
#Override
public void onClick() {
PageParameters p2 = new PageParameters();
p2.add("jobNumber", job.getParentJob());
JobDetails.this.replaceWith(new ParentJobDetails("innerpanel", p2));
}
};
plink.add(new Label("parentJobLabel", job.getParentJob()));
item.add(plink);
item.add(new Label("jobType", job.getJobType()));
item.add(new Label("whoSubmitted", job.getWhoSubmitted()));
item.add(new Label("objectType", job.getObjectType()));
item.add(new Label("objectNumber", job.getObjectNumber()));
item.add(new Label("objectRevision", job.getObjectRevision()));
item.add(new Label("jobStatus", job.getJobStatus()));
}
};
dataView.setItemsPerPage(20);
add(dataView);
add(new CustomPagingNavigator("navigator", dataView));
if (list.size() == 0) {
***"Replace the Current Panel with new(SearchInnerPanel("innerpanel", params)"***
}
}
}
Scenario: when i search for a job, if a job exists job is displayed in this panel and if the job does not exist it is redirected back to the search panel. i am unable to redirect back to the search panel.
Here is how the code should look really like:
public class JobDetails extends Panel {
private static final Logger LOGGER = Logger.getLogger(JobDetails.class);
public static final long serialVersionUID = 42L;
private List<Job> list;
public JobDetails(String id, final PageParameters params) {
super(id);
FeedbackPanel feedbackpanel = new FeedbackPanel("feedbackpanel");
add(feedbackpanel);
}
#Override
protected void onInitialize() {
super.onInitialize();
PageParameters params = getPage().getPageParameters();
String JOBNUMBER = params.get("jobnumber").toString();
String OBJECTTYPE = params.get("objecttype").toString();
String OBJECTNUMBER = params.get("objectnumber").toString();
if (JOBNUMBER != null) {
LOGGER.info("JOBNUMBER != null");
list = Utils.retrieve(JOBNUMBER);
} else {
list = Utils.retrieve(OBJECTTYPE, OBJECTNUMBER);
}
DataView dataView = new DataView("jobs", new ListDataProvider(list)) {
#Override
public void onConfigure() {
super.onConfigure();
setVisible(getDataProvider().size() > 0);
}
#Override
protected void populateItem(final Item item) {
final Job job = (Job) item.getModelObject();
Link plink = new Link("parentJobLink") {
#Override
public void onClick() {
PageParameters p2 = new PageParameters();
p2.add("jobNumber", job.getParentJob());
JobDetails.this.replaceWith(new ParentJobDetails("innerpanel", p2));
}
};
plink.add(new Label("parentJobLabel", job.getParentJob()));
item.add(plink);
item.add(new Label("jobType", job.getJobType()));
item.add(new Label("whoSubmitted", job.getWhoSubmitted()));
item.add(new Label("objectType", job.getObjectType()));
item.add(new Label("objectNumber", job.getObjectNumber()));
item.add(new Label("objectRevision", job.getObjectRevision()));
item.add(new Label("jobStatus", job.getJobStatus()));
}
};
dataView.setItemsPerPage(20);
add(dataView);
add(new CustomPagingNavigator("navigator", dataView));
if (list.size() == 0) {
replaceWith(new(SearchInnerPanel("innerpanel", params));
}
}
}
But it would be much better if you move the code that retrieves the list to the parent of this panel. If there are items in the list then use JobDetails panel, otherwise use SearchInnerPanel
Related
In my code below I created a method which is: I would like to put a variable in putExtra that I can get it in the new activity. The problem is in the new activity gave me the first value(numtelephone) from first element in my list. I know that because of getItem(0), but how can I get the value( numtelephone ) for every element from the list?
public class ListClient extends Activity {
String myJSON,test;
TextView numt;
private static final String TAG_RESULTS="result";
private static final String TAG_NOMCLIENT = "nomclient";
private static String TAG_NUMTELEPHONE ="numtelephone";
private static final String TAG_DEPART ="depart";
private static final String TAG_DESTINATION ="destination";
private static final String TAG_NBRPERSONNE ="nbrpersonne";
JSONArray peoples = null;
ArrayList<HashMap<String, String>> personList;
ListView list;
#SuppressLint("NewApi")
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list_client);
list = (ListView) findViewById(R.id.list);
personList = new ArrayList<HashMap<String,String>>();
getData();
}
protected void showList(){
//json parsing etc...
ListAdapter adapter = new SimpleAdapter(
ListClient.this, personList, R.layout.list_item,
new String[]{TAG_NOMCLIENT,TAG_NUMTELEPHONE,TAG_DEPART,TAG_DEPART,TAG_NBRPERSONNE},
new int[]{R.id.name, R.id.numt, R.id.depart, R.id.destination, R.id.nbrpersonne}
);
list.setAdapter(adapter);
}
public void getData(){
class GetDataJSON extends AsyncTask<String, Void, String>{
#Override
protected String doInBackground(String... params) {
// json dowload from web, not needed in this question
return "";
}
#Override
protected void onPostExecute(String result){
myJSON=result;
showList();
}
}
GetDataJSON g = new GetDataJSON();
g.execute();
}
public void GoUpdate(View v ) {
Intent in = new Intent(getBaseContext(), Update.class);
in.putExtra("NUMTELEPHONE",((HashMap<String, String>)list.getAdapter().getItem(0)).get("numtelephone"));
}
startActivity(in);
}
}
There is simple and only one solution. Delete your xml android:click property of list and add this list#setOnItemClickListener in your onCreate:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list_client);
list = (ListView) findViewById(R.id.list);
personList = new ArrayList<HashMap<String,String>>();
getData();
//this thing has been added
list.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if(id!=-1){
Intent in = new Intent(getBaseContext(), Update.class);
in.putExtra("NUMTELEPHONE", ((HashMap<String, String>) list.getAdapter().getItem((int)id)).get("numtelephone")); //TAG_NUMTELEPHONE
startActivity(in);
}
}
});
}
To move it from onCreate do:
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_list_client);
list = (ListView) findViewById(R.id.list);
personList = new ArrayList<HashMap<String, String>>();
getData();
list.setOnItemClickListener(new OnMyListItemClickListener());
}
Context context = this;
private class OnMyListItemClickListener implements AdapterView.OnItemClickListener {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if(id!=-1){
Intent in = new Intent(context, Update.class);
in.putExtra("NUMTELEPHONE", ((HashMap<String, String>) list.getAdapter().getItem((int) id)).get("numtelephone")); //TAG_NUMTELEPHONE
startActivity(in);
}
}
}
Lesson learned - dont create sucha buttons - they are not aware in which item they are, so you cant extract the id - instead just use something like AlertDialog
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if(id!=-1){
AlertDialog.Builder al = new AlertDialog.Builder(context);
al.setMessage("Are you sure you want to do it?");
al.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
Intent in = new Intent(context, Update.class);
in.putExtra("NUMTELEPHONE", ((HashMap<String, String>) list.getAdapter().getItem((int) id)).get(TAG_NUMTELEPHONE));
startActivity(in);
}
});
al.setNegativeButton(android.R.string.no, null);
al.show();
}
}
I have a celltable and I'm trying implement pagination, but it doesn't work. I looked for solutions but without any success. I click in next page, nothing happens. I forgot to implement something? Someone can help me? Thanks for attention! Below, my implementation:
Java:
public class TaskPanel extends Composite {
private static TaskPanelUiBinder uiBinder = GWT
.create(TaskPanelUiBinder.class);
interface TaskPanelUiBinder extends UiBinder<Widget, TaskPanel> {
}
public TaskPanel() {
this.tableTask = createTableTask();
//Populate celltable
preencheListaTask();
initWidget(uiBinder.createAndBindUi(this));
}
#UiField(provided = true)
CellTable<Task> tableTask;
#UiField
AccordionGroup accordionTable;
#UiField Button btnRefresh;
#UiField SimplePager pager;
#UiField FormTaskPanel formTask;
List<Task> listTasks = new ArrayList<Task>();
ListDataProvider<Task> tableTaskProvider;
public List<Task> getListTasks() {
return this.listTasks;
}
public void setListTasks(List<Task> lista) {
this.listTasks = lista;
}
public TaskPanel getTaskPanel() {
return this;
}
//Create celltable
public CellTable<Task> createTableTask() {
tableTask = new CellTable<Task>();
tableTask.setPageSize(2);
TextColumn<Task> dataInicioColumn = new TextColumn<Task>() {
#Override
public String getValue(Task task) {
return task.getDataInicial();
}
};
tableTask.addColumn(dataInicioColumn, "Data Inicio");
TextColumn<Task> dataFinalColumn = new TextColumn<Task>() {
#Override
public String getValue(Task task) {
return task.getDataFinal();
}
};
tableTask.addColumn(dataFinalColumn, "Data Final");
TextColumn<Task> descricaoColumn = new TextColumn<Task>() {
#Override
public String getValue(Task task) {
return task.getDescricao();
}
};
tableTask.addColumn(descricaoColumn, "Descricao");
TextColumn<Task> categoriaColumn = new TextColumn<Task>() {
#Override
public String getValue(Task task) {
return task.getCategoria();
}
};
tableTask.addColumn(categoriaColumn, "Categoria");
TextColumn<Task> prioridadeColumn = new TextColumn<Task>() {
#Override
public String getValue(Task task) {
return task.getPrioridade();
}
};
tableTask.addColumn(prioridadeColumn, "Prioridade");
return tableTask;
}
//Generate a JSON, and I parse for List<Task> to populate celltable
public List<Task> preencheListaTask() {
final List<Task> lista = new ArrayList<Task>();
String url = "http://127.0.0.1:8888/financecontrol/jsonTableTasks.json";
RequestBuilder builder = new RequestBuilder(RequestBuilder.GET, url);
try {
Request request = builder.sendRequest(null, new RequestCallback() {
public void onError(Request request, Throwable exception) {
System.out.println("Error to retrieve JSON");
}
#Override
public void onResponseReceived(Request arg0, Response response) {
if (200 == response.getStatusCode()) {
JSONValue value = JSONParser.parse(response.getText());
com.google.gwt.json.client.JSONObject taskObjs = value
.isObject();
JSONArray tasksArray = taskObjs.get("tasks").isArray();
if (tasksArray != null) {
for (int i = 0; i < tasksArray.size(); i++) {
com.google.gwt.json.client.JSONObject taskObj = tasksArray
.get(i).isObject();
String id = taskObj.get("ID").isNumber().toString();
String dataInicial = taskObj
.get("Data Inicial").isString()
.stringValue();
String dataFinal = taskObj.get("Data Final")
.isString().stringValue();
String descricao = taskObj.get("Descricao")
.isString().stringValue();
String categoria = taskObj.get("Categoria").isString().toString();
String prioridade = taskObj.get("Prioridade").isString().toString();
Task task = new Task(Integer.parseInt(id),
dataInicial, dataFinal,
descricao, categoria, prioridade);
lista.add(task);
}
setListTasks(lista);
System.out.println("JSON retrieve");
}
addLinhas();
} else {
System.out.println("Couldn't retrieve JSON ("
+ response.getStatusText() + ")");
}
}
});
} catch (RequestException e) {
System.err.println("Erro cath - " + e.getMessage());
}
return lista;
}
//add rows to celltable
public void addLinhas() {
this.tableTask.setRowCount(getListTasks().size(), true);
this.tableTask.setRowData(0, getListTasks());
tableTask.redraw();
tableTaskProvider = new ListDataProvider<Task>(getListTasks());
tableTaskProvider.addDataDisplay(tableTask);
//Pagination
SimplePager.Resources pagerResources = GWT.create(SimplePager.Resources.class);
pager = new SimplePager(TextLocation.CENTER, pagerResources, false, 0, true);
pager.setDisplay(tableTask);
}
#UiHandler("btnRefresh")
public void onClickRefresh(ClickEvent e) {
preencheListaTask();
}
}
UiBinder:
<!DOCTYPE ui:UiBinder SYSTEM "http://dl.google.com/gwt/DTD/xhtml.ent">
<ui:style>
.formContent {
height: 70%;
}
</ui:style>
<b:Container addStyleNames="{style.formContent}">
<r:FormTaskPanel ui:field="formTask"/>
<b:AccordionGroup ui:field="accordionTable" defaultOpen="false" heading="Task List">
<b:CellTable ui:field="tableTask" />
<b:SimplePager ui:field="pager" location="CENTER"/>
<b:Button ui:field="btnRefresh" text="Refresh" icon="REFRESH"/>
</b:AccordionGroup>
</b:Container>
You have pager = new SimplePager(...), so you have to declare #uiField(provided = true) for pager, and move pager declaration/initialisation into your createTableTask function (pager must be set before initwidget).
TextCellEditor passEdit has SWT.PASSWORD style. But when Add button was clicked original characters were shown instead of default * echo characters. Also focus listeners on passEdit were not working. i.e When user double clicks it should show original characters and on focus lost it should show password echo characters.
How to fix this?
public class UserAddSolution {
public static boolean flag = true;
private TextCellEditor userNameEdit;
private TextCellEditor passEdit;
class UserNamePassword {
private final String name;
private final String password;
public UserNamePassword(String name, String password) {
this.name = name;
this.password = password;
}
public String getName() {
return name;
}
public String getPassword() {
return password;
}
}
public UserAddSolution(final Shell shell) {
shell.setLayout(new GridLayout(2, false));
GridData layoutData = new GridData();
layoutData.heightHint = 300;
shell.setLayoutData(layoutData);
final TableViewer viewer = new TableViewer(shell, SWT.BORDER
| SWT.FULL_SELECTION | SWT.MULTI);
viewer.setContentProvider(ArrayContentProvider.getInstance());
Table table = viewer.getTable();
table.setLayout(new GridLayout());
table.setLayoutData(layoutData);
userNameEdit = new TextCellEditor(table);
passEdit = new TextCellEditor(table, SWT.PASSWORD);
final Text tex = (Text) passEdit.getControl();
final char echar = tex.getEchoChar();
tex.addFocusListener(new FocusListener() {
#Override
public void focusLost(FocusEvent e) {
tex.setEchoChar(echar);
}
#Override
public void focusGained(FocusEvent e) {
tex.setEchoChar('\0');
}
});
viewer.setCellEditors(new CellEditor[] { userNameEdit, passEdit });
viewer.setCellModifier(new ICellModifier() {
#Override
public boolean canModify(Object element, String property) {
return true;
}
#Override
public Object getValue(Object element, String property) {
UserNamePassword ele = (UserNamePassword) element;
if (property.equals("1")) {
return ele.getName();
} else if (property.equals("2")) {
return ele.getPassword();
}
return "";
}
#Override
public void modify(Object element, String property, Object value) {
}
});
viewer.setColumnProperties(new String[] { "1", "2" });
ColumnViewerEditorActivationStrategy actSupport = new ColumnViewerEditorActivationStrategy(
viewer) {
#Override
protected boolean isEditorActivationEvent(
ColumnViewerEditorActivationEvent event) {
return event.eventType == ColumnViewerEditorActivationEvent.TRAVERSAL
|| event.eventType == ColumnViewerEditorActivationEvent.MOUSE_DOUBLE_CLICK_SELECTION
|| event.eventType == ColumnViewerEditorActivationEvent.PROGRAMMATIC;
}
};
int feature = ColumnViewerEditor.TABBING_HORIZONTAL
| ColumnViewerEditor.TABBING_MOVE_TO_ROW_NEIGHBOR
| ColumnViewerEditor.TABBING_VERTICAL
| ColumnViewerEditor.KEYBOARD_ACTIVATION;
TableViewerEditor.create(viewer, actSupport, feature);
TableViewerColumn userNameColumn;
userNameColumn = new TableViewerColumn(viewer, SWT.NONE);
userNameColumn.getColumn().setWidth(200);
userNameColumn.getColumn().setMoveable(true);
userNameColumn.getColumn().setText("Name");
userNameColumn.setLabelProvider(new ColumnLabelProvider() {
#Override
public Image getImage(Object element) {
return super.getImage(element);
}
#Override
public String getText(Object element) {
UserNamePassword fdf = (UserNamePassword) element;
return super.getText(fdf.getName());
}
});
TableViewerColumn passwordColumn;
passwordColumn = new TableViewerColumn(viewer, SWT.NONE);
passwordColumn.getColumn().setWidth(200);
passwordColumn.getColumn().setMoveable(true);
passwordColumn.getColumn().setText("Password");
passwordColumn.setLabelProvider(new ColumnLabelProvider() {
#Override
public Image getImage(Object element) {
return super.getImage(element);
}
#Override
public String getText(Object element) {
UserNamePassword fdf = (UserNamePassword) element;
return super.getText(fdf.getPassword());
}
#Override
public void update(ViewerCell cell) {
super.update(cell);
}
});
viewer.setInput(new ArrayList<UserNamePassword>());
table.setLinesVisible(true);
table.setHeaderVisible(true);
viewer.refresh();
Button add = new Button(shell, SWT.PUSH);
add.setText("Add");
add.addSelectionListener(new SelectionListener() {
#Override
public void widgetSelected(SelectionEvent e) {
viewer.add(new UserNamePassword("abc", "xyz"));
}
#Override
public void widgetDefaultSelected(SelectionEvent e) {
}
});
}
public static void main(String[] args) {
Display display = new Display();
Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
new UserAddSolution(shell);
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}
The ColumnLabelProvider is responsible for displaying the data in the table. The text widget appears only when you edit a cell. That's why you need to tell the label provider to mask characters and not to display the plain text.
As a consequence you don't need to set SWT.PASSWORD style to the passEdit since you want to display the password in the editor as plain text:
passEdit = new TextCellEditor(table, SWT.NONE);
You also don't need the FocusListener and you can set the echo char as a constant:
private static final String ECHARSTR = Character.toString((char)9679);
So you can remove 15 lines below the initialization of passEdit
I don't know if there is a solution for this in JFace (I think not) but you can easily solve this by modifying your existing label provider. My suggestion is to modify the getText() method of ColumnLabelProvider for passwordColumn as follows:
#Override
public String getText(Object element)
{
UserNamePassword fdf = (UserNamePassword)element;
return fdf.getPassword().replaceAll(".", ECHARSTR);
}
I am implementing a directory structure like Windows Explorer. I want to re-render a specific node of tree after any folder operations is done such as add folder, remove folder... etc
private ListDataProvider<Object> dataProvider= new ListDataProvider<Object>();
private Object current;//store object of currentNode;
private Map<Object, ListDataProvider<Object>> keyprovider =
new HashMap<Object,ListDataProvider<Object>>();
private CellTree tree;
// keeps a map for storing dataproviders in each hierarchy ,
public void setListToCurrentNode(List<Object> newList){
//adding this newlist to current data provider not reflecting to display
keyprovider.get(currentObject).setList(newList);
}
public void onModuleLoad(){
treeSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
public void onSelectionChange(SelectionChangeEvent event) {
//setting current object as selected node
current = treeSelectionModel.getSelectedObject();
}
});
}
Data providers force to re-render corresponding DOM. Code below demonstrates how it works.
This example generates 2-leveled tree, where you can refresh (re-generate) leaf nodes by pressing Enter key on selected root node.
I tried to keep code as simple as possible, all needed stuff contained right here.
public class TestEntryPoint implements EntryPoint {
private static final Logger LOG = Logger.getLogger(TestEntryPoint.class.getName());
class Item {
String name;
boolean leaf;
public Item(String name, boolean leaf) {
this.name = name;
this.leaf = leaf;
}
#Override
public String toString() {
return "Item {name=" + name + ", leaf=" + leaf + "}";
}
}
class ItemCell extends AbstractCell<Item> {
public ItemCell() {
super("keydown");
}
#Override
public void render(Context context, Item value, SafeHtmlBuilder sb) {
if (value != null) sb.appendEscaped(value.name);
}
#Override
protected void onEnterKeyDown(
Context context, Element parent, Item value, NativeEvent event, ValueUpdater<Item> valueUpdater) {
LOG.info("ItemCell.onEnterKeyDown: value=" + value);
if (value == null || value.leaf) return;
ListDataProvider<Item> leafDataProvider = leafDataProviders.get(value.name);
if (leafDataProvider == null) return;
// -->> Here we generate new childs of selected root node
leafDataProvider.setList(generateLeafs());
}
}
class ItemTreeViewModel implements TreeViewModel {
#Override
public <T> NodeInfo<?> getNodeInfo(T value) {
return new DefaultNodeInfo<Item>(
value == null ? rootDataProvider : leafDataProviders.get(((Item) value).name),
new ItemCell());
}
#Override
public boolean isLeaf(Object value) {
return (value instanceof Item) && ((Item) value).leaf;
}
}
private int id = 0;
private CellTree cellTree;
private ListDataProvider<Item> rootDataProvider;
private Map<String, ListDataProvider<Item>> leafDataProviders = new HashMap<String, ListDataProvider<Item>>();
private List<Item> generateLeafs() {
List<Item> leafList = new ArrayList<Item>(5);
for (int j = 0; j < 5; ++j)
leafList.add(new Item("Leaf Item " + (++id), true));
return leafList;
}
public void onModuleLoad() {
List<Item> rootList = new ArrayList<Item>(10);
for (int i = 0; i < 10; ++i) {
Item rootItem = new Item("Root Item " + (++id), false);
rootList.add(rootItem);
leafDataProviders.put(rootItem.name, new ListDataProvider<Item>(generateLeafs()));
}
rootDataProvider = new ListDataProvider<Item>(rootList);
cellTree = new CellTree(new ItemTreeViewModel(), null);
cellTree.setAnimationEnabled(true);
RootLayoutPanel.get().add(cellTree);
}
}
Solved by Changing Listdataprovider into AsyncDataProvider ,Implementation is below
private final class DataProvider extends AsyncDataProvider<Object> {
private Object value;
private List Objs;
DataProvider(Object value) {
this.value = value;
}
public void update(List objs) {//Call update when you wanted to refresh tree
this.objs=objs;
for (HasData<Object> disp : getDataDisplays()) {
this.onRangeChanged(disp);
break;
}
}
#Override
protected void onRangeChanged(final HasData<Object> display) {
updateRowData(0, objs);
updateRowCount(objs.size(), true);
}
Using GWT 2.4...
I am building upon a complex Composite dual view/edit mode implementation that is backed GWT's DataGrid and MultiSelectionModel. My goal is for a user to be able to click a checkbox in each row that they'd like to post updates for.
Here's a screenshot from a semi-functional interface:
Note the selected (highlighted) rows.
Now the problem is that when I type something in any of the cells (e.g., the first row's $ cell under the $/Mw 1 composite cell header), then click that row's checkbox (or any other row's checkbox for that matter) to select or de-select, the value gets reset to the original value when the screen's data was first requested. Not desired behavior by any stretch!
Let's take a look at my custom implementation for the grid. (Excuse the length).
public abstract class ToggleableGrid<T extends Identifiable<?>> extends Composite {
private static final int CHKBOX_COLUMN_WIDTH = App.INSTANCE.checkboxColumnWidth();
private static final DisplayMode DEFAULT_MODE = DisplayMode.VIEW;
private ProvidesKey<T> keyProvider;
private DataGrid<T> grid;
private MultiSelectionModel<T> selectionModel;
private ListDataProvider<T> dataProvider;
private int tabIndex = 0;
public ToggleableGrid() {
final DataGridConfiguration config = new DefaultDataGridConfiguration();
initGrid(config);
}
public ToggleableGrid(DataGridConfiguration config) {
initGrid(config);
}
private void initGrid(DataGridConfiguration config) {
keyProvider = new ProvidesKey<T>() {
#Override
public Object getKey(T item) {
return item == null ? null : item.getId();
}
};
grid = new DataGrid<T>(config.getPageSize(), config.getResources(), keyProvider);
// Set the message to display when the table is empty.
grid.setEmptyTableWidget(new Label(UiMessages.INSTANCE.no_results()));
initWidget(grid);
setVisible(true);
}
public void setInput(List<T> content) {
setInput(content, DEFAULT_MODE);
}
public void setInput(List<T> content, DisplayMode mode) {
resetTableColumns();
if (isInEditMode(mode)) {
// Add a selection model so we can select cells
selectionModel = new MultiSelectionModel<T>(keyProvider);
grid.setSelectionModel(selectionModel, DefaultSelectionEventManager.<T> createCheckboxManager(0));
addRowSelector();
}
dataProvider = new ListDataProvider<T>(content);
final ListHandler<T> sortHandler = new ListHandler<T>(dataProvider.getList());
grid.addColumnSortHandler(sortHandler);
initializeStructure(constructMetadata(), sortHandler, mode);
dataProvider.addDataDisplay(grid);
}
// see https://stackoverflow.com/questions/3772480/remove-all-columns-from-a-celltable
// concrete classes are forced to maintain a handle on all columns added
private void resetTableColumns() {
for (final Column<T, ?> column: allColumns()) {
grid.removeColumn(column);
}
allColumns().clear();
}
protected boolean isInEditMode(DisplayMode currentDisplayMode) {
boolean result = false;
if (currentDisplayMode.equals(DisplayMode.EDIT)) {
result = true;
}
return result;
}
protected abstract Set<Column<T, ?>> allColumns();
protected abstract TableMetadata constructMetadata();
protected abstract void initializeStructure(TableMetadata metadata, ListHandler<T> sortHandler, DisplayMode mode);
protected void setColumnHorizontalAlignment(Column<T, ?> column, HorizontalAlignmentConstant alignment) {
column.setHorizontalAlignment(alignment);
}
// TODO figure out how to add a checkbox to column header that provides select/de-select all capability
// see https://stackoverflow.com/questions/6174689/gwt-celltable-programmatically-select-checkboxcell
protected void addRowSelector() {
final Column<T, Boolean> rowSelectColumn = new Column<T, Boolean>(new CheckboxCell(true, false)) {
#Override
public Boolean getValue(T value) {
Boolean result;
// check for null value and return null;
if(value == null || value.getId() == null) {
result = null;
} else { // get value from the selection model
result = selectionModel.isSelected(value);
}
return result;
}
};
addColumn(rowSelectColumn, UiMessages.INSTANCE.select());
setColumnWidth(rowSelectColumn, CHKBOX_COLUMN_WIDTH, Unit.PX);
setColumnHorizontalAlignment(rowSelectColumn, HasHorizontalAlignment.ALIGN_CENTER);
}
protected void setColumnWidth(Column<T, ?> column, int width, Unit unit) {
grid.setColumnWidth(column, width, unit);
}
protected void addColumn(Column<T, ?> column, String columnHeaderName) {
addColumn(column, columnHeaderName, HasHorizontalAlignment.ALIGN_RIGHT);
}
protected void addColumn(Column<T, ?> column, String columnHeaderName, HorizontalAlignmentConstant alignment) {
final SafeHtmlBuilder sb = new SafeHtmlBuilder();
final String divStart = "<div align=\""+ alignment.getTextAlignString() + "\" class=\"" +UiResources.INSTANCE.style().word_wrap() + "\">";
sb.appendHtmlConstant(divStart).appendEscaped(columnHeaderName).appendHtmlConstant("</div>");
final SafeHtml header = sb.toSafeHtml();
grid.addColumn(column, header);
allColumns().add(column);
}
protected CompositeCell<T> generateCompositeCell(final List<HasCell<T, ?>> hasCells) {
final CompositeCell<T> compositeCell = new CompositeCell<T>(hasCells) {
#Override
public void render(Context context, T value, SafeHtmlBuilder sb) {
sb.appendHtmlConstant("<table><tbody><tr>");
super.render(context, value, sb);
sb.appendHtmlConstant("</tr></tbody></table>");
}
#Override
protected Element getContainerElement(Element parent) {
// Return the first TR element in the table.
return parent.getFirstChildElement().getFirstChildElement().getFirstChildElement();
}
#Override
protected <X> void render(Context context, T value,
SafeHtmlBuilder sb, HasCell<T, X> hasCell) {
final Cell<X> cell = hasCell.getCell();
sb.appendHtmlConstant("<td>");
cell.render(context, hasCell.getValue(value), sb);
sb.appendHtmlConstant("</td>");
}
};
return compositeCell;
}
// FIXME not working quite the way we'd expect, index incremented within column for each row, not each row by column
protected int nextTabIndex() {
tabIndex++;
return tabIndex;
}
protected AbstractCellTable<T> getGrid() {
return grid;
}
/**
* Gets the selected (row(s) of) data from grid (used in edit mode)
* #return the selected data (as per selection model)
*/
public List<T> getSelectedData() {
final List<T> data = new ArrayList<T>();
data.addAll(selectionModel.getSelectedSet());
return data;
}
/**
* Gets all (row(s) of) data in grid (used in edit mode)
* #return all data as list
*/
public List<T> getAllData() {
return dataProvider.getList();
}
/**
* Clears the currently selected (row(s) of) data (used in edit mode)
*/
public void clearSelectedData() {
selectionModel.clear();
grid.redraw();
}
}
So, the interesting methods to stare at above (I think) are setInput, generateCompositeCell and addRowSelector.
We initialize the grid with List data and set a display mode in setInput. It's here as well that the selection model is initialized. It uses GWT's DefaultSelectionEventManager createCheckboxManager().
I've been trying to grok the event model, but it eludes me. I've visited the following sources online, but have come up short on avenues to solving this problem.
-- https://groups.google.com/forum/?fromgroups#!topic/google-web-toolkit/k5sfURxDaVg
AbstractInputCell's getConsumedEventsImpl adds focus, blur and keydown, so this (I believe) is not a track I need to explore
-- GWT CellTable programmatically select CheckBoxCell
The various ways you can instantiate a CheckBoxCell got me curious, and I've tried many constructor argument permutations, but the one I settled on (true, false) is (I believe) the right one
Agreeing here and now (before being reprimanded) that there's perhaps some unnecessary complexity in my implementation, but I am looking for guidance nonetheless. Thanks!
Update
If it helps here's an impl of the aforementioned ToggleableGrid. If anything it gives you more detail on what goes into each CompositeCell. For details on AbstractValidatableColumn and ValidatableInputCell, see: In search of a GWT validation example... where art thou?.
public class EnergyOfferGrid extends ToggleableGrid<EnergyOfferDTO> {
public EnergyOfferGrid() {
super();
}
public EnergyOfferGrid(DataGridConfiguration config) {
super(config);
}
private static final int MAX_NUMBER_OF_MW_PRICE_POINTS = App.INSTANCE.maxNoOfMwPricePoints();
private Set<Column<EnergyOfferDTO, ?>> columns = new HashSet<Column<EnergyOfferDTO, ?>>();
#Override
protected Set<Column<EnergyOfferDTO, ?>> allColumns() {
return columns;
}
#Override
protected TableMetadata constructMetadata() {
final TableMetadata metadata = new TableMetadata();
// TODO Consider a predefined set of ReferenceData to be held in a common package
// Use Slope
metadata.addColumnMetadata(UiMessages.INSTANCE.use_slope(), new String[] {UiMessages.INSTANCE.yes(), UiMessages.INSTANCE.no()}, new String[] {"true", "false"});
return metadata;
}
#Override
protected void initializeStructure(TableMetadata metadata, ListHandler<EnergyOfferDTO> sortHandler, DisplayMode currentDisplayMode) {
addHourColumn(sortHandler);
addUseSlopeColumn(metadata, sortHandler, currentDisplayMode);
for (int i = 0; i < MAX_NUMBER_OF_MW_PRICE_POINTS; i++) { // zero-based indexing
addPriceMwColumn(i, currentDisplayMode);
}
}
protected void addHourColumn(ListHandler<EnergyOfferDTO> sortHandler) {
final Column<EnergyOfferDTO, String> hourColumn = new Column<EnergyOfferDTO, String>(new TextCell()) {
#Override
public String getValue(EnergyOfferDTO energyOffer) {
String result = "";
if (energyOffer.getId() != null) {
final String isoDateTime = energyOffer.getId().getOperatingHour();
if (isoDateTime != null && !isoDateTime.isEmpty()) {
final Date dateTime = CSTimeUtil.isoToDate(isoDateTime);
if (dateTime != null) {
result = CSTimeUtil.dateToHour(dateTime);
}
}
}
return result;
}
};
hourColumn.setSortable(true);
sortHandler.setComparator(hourColumn, new Comparator<EnergyOfferDTO>() {
#Override
public int compare(EnergyOfferDTO eo1, EnergyOfferDTO eo2) {
final String date1 = eo1.getId() != null ? eo1.getId().getOperatingHour() : "";
final String date2 = eo2.getId() != null ? eo2.getId().getOperatingHour() : "";
return date1.compareTo(date2);
}
});
// We know that the data is sorted by hour by default.
getGrid(). getColumnSortList().push(hourColumn);
addColumn(hourColumn, UiMessages.INSTANCE.hour());
setColumnWidth(hourColumn, 45, Unit.PX);
setColumnHorizontalAlignment(hourColumn, HasHorizontalAlignment.ALIGN_RIGHT);
}
protected void addUseSlopeColumn(TableMetadata metadata, ListHandler<EnergyOfferDTO> sortHandler, DisplayMode currentDisplayMode) {
final ReferenceData refData = metadata.allColumnMetadata().get(UiMessages.INSTANCE.use_slope());
Column<EnergyOfferDTO, String> useSlopeColumn;
Cell<String> cell;
if (isInEditMode(currentDisplayMode)) {
cell = new ReferenceDataBackedSelectionCell(refData);
} else {
cell = new TextCell();
}
useSlopeColumn = new Column<EnergyOfferDTO, String>(cell) {
#Override
public String getValue(EnergyOfferDTO energyOffer) {
return refData.getDisplayValueForSubmitValue(Boolean.toString(energyOffer.isSlopeUsed()));
}
};
useSlopeColumn.setSortable(true);
sortHandler.setComparator(useSlopeColumn, new Comparator<EnergyOfferDTO>() {
#Override
public int compare(EnergyOfferDTO eo1, EnergyOfferDTO eo2) {
final String slopeUsed1 = String.valueOf(eo1.isSlopeUsed());
final String slopeUsed2 = String.valueOf(eo1.isSlopeUsed());
return slopeUsed1.compareTo(slopeUsed2);
}
});
addColumn(useSlopeColumn, UiMessages.INSTANCE.use_slope());
setColumnWidth(useSlopeColumn, 75, Unit.PX);
setColumnHorizontalAlignment(useSlopeColumn, HasHorizontalAlignment.ALIGN_RIGHT);
}
protected void addPriceMwColumn(final int colIndex, DisplayMode currentDisplayMode) {
// Construct a composite cell for energy offers that includes a pair of text inputs
final List<HasCell<EnergyOfferDTO, ?>> columns = new ArrayList<
HasCell<EnergyOfferDTO, ?>>();
// this DTO is passed along so that price and mw values for new entries are kept together
final OfferPriceMwPair newOfferPriceMwPair = new OfferPriceMwPair();
// Price
final Column<EnergyOfferDTO, String> priceColumn = generatePriceColumn(colIndex, newOfferPriceMwPair, currentDisplayMode);
columns.add(priceColumn);
// MW
final Column<EnergyOfferDTO, String> mwColumn = generateMwColumn(colIndex, newOfferPriceMwPair, currentDisplayMode);
columns.add(mwColumn);
// Composite
final CompositeCell<EnergyOfferDTO> priceMwColumnInnards = generateCompositeCell(columns);
final IdentityColumn<EnergyOfferDTO> priceMwColumn = new IdentityColumn<EnergyOfferDTO>(priceMwColumnInnards);
final StringBuilder colHeader = new StringBuilder();
colHeader.append(UiMessages.INSTANCE.price_mw_header()).append(" ").append(String.valueOf(colIndex + 1));
addColumn(priceMwColumn, colHeader.toString());
setColumnWidth(priceMwColumn, 7, Unit.EM);
setColumnHorizontalAlignment(priceMwColumn, HasHorizontalAlignment.ALIGN_RIGHT);
}
protected Column<EnergyOfferDTO, String> generatePriceColumn(final int colIndex, final OfferPriceMwPair newOfferPriceMwPair, DisplayMode currentDisplayMode) {
Column<EnergyOfferDTO, String> priceColumn;
if (isInEditMode(currentDisplayMode)) {
priceColumn = new BigDecimalValidatableColumn<EnergyOfferDTO, OfferPriceMwPair>(nextTabIndex(), getGrid()) {
#Override
public String getValue(EnergyOfferDTO energyOffer) {
return obtainPriceValue(colIndex, energyOffer, false);
}
#Override
public void doUpdate(int index, EnergyOfferDTO energyOffer, String value) {
if (value != null && !value.isEmpty()) {
// number format exceptions should be caught and handled by event bus's handle method
final double valueAsDouble = NumberFormat.getDecimalFormat().parse(value);
final BigDecimal price = BigDecimal.valueOf(valueAsDouble);
final List<OfferPriceMwPair> offerPriceCurve = energyOffer.getCurve();
final OfferPriceMwPair offerPriceMwPair = offerPriceCurve.get(colIndex);
if (offerPriceMwPair == null) { // we have a new price value
newOfferPriceMwPair.setPrice(price);
offerPriceCurve.add(newOfferPriceMwPair);
} else {
offerPriceMwPair.setPrice(price);
}
}
}
#Override
protected String getPropertyName() {
return "price";
}
#Override
protected Class<OfferPriceMwPair> getPropertyOwner() {
return OfferPriceMwPair.class;
}
};
} else {
priceColumn = new Column<EnergyOfferDTO, String>(new TextCell()) {
#Override
public String getValue(EnergyOfferDTO energyOffer) {
final String result = obtainPriceValue(colIndex, energyOffer, true);
return result;
}
};
}
return priceColumn;
}
private String obtainPriceValue(final int colIndex, EnergyOfferDTO energyOffer, boolean withCurrency) {
String result = "";
if (energyOffer != null) {
final List<OfferPriceMwPair> offerPriceCurve = energyOffer.getCurve();
final int numberOfPairs = offerPriceCurve.size();
if (colIndex < numberOfPairs) {
final OfferPriceMwPair offerPriceMwPair = offerPriceCurve.get(colIndex);
if (offerPriceMwPair != null) {
final BigDecimal price = offerPriceMwPair.getPrice();
if (price != null) {
final double value = price.doubleValue();
if (withCurrency) {
result = NumberFormat.getCurrencyFormat().format(value);
} else {
result = NumberFormat.getDecimalFormat().format(value);
}
}
}
}
}
return result;
}
protected Column<EnergyOfferDTO, String> generateMwColumn(final int colIndex, final OfferPriceMwPair newOfferPriceMwPair, DisplayMode currentDisplayMode) {
Column<EnergyOfferDTO, String> mwColumn;
if (isInEditMode(currentDisplayMode)) {
mwColumn = new BigDecimalValidatableColumn<EnergyOfferDTO, PriceMwPair>(nextTabIndex(), getGrid()) {
#Override
public String getValue(EnergyOfferDTO energyOffer) {
return obtainMwValue(colIndex, energyOffer);
}
#Override
public void doUpdate(int index, EnergyOfferDTO energyOffer, String value) {
if (value != null && !value.isEmpty()) {
// number format exceptions should be caught and handled by event bus's handle method
final double valueAsDouble = NumberFormat.getDecimalFormat().parse(value);
final BigDecimal mw = BigDecimal.valueOf(valueAsDouble);
final List<OfferPriceMwPair> offerPriceCurve = energyOffer.getCurve();
final OfferPriceMwPair offerPriceMwPair = offerPriceCurve.get(colIndex);
if (offerPriceMwPair == null) { // we have a new price value
newOfferPriceMwPair.setMw(mw);
offerPriceCurve.add(newOfferPriceMwPair);
} else {
offerPriceMwPair.setMw(mw);
}
}
}
#Override
protected String getPropertyName() {
return "mw";
}
#Override
protected Class<PriceMwPair> getPropertyOwner() {
return PriceMwPair.class;
}
};
} else {
mwColumn = new Column<EnergyOfferDTO, String>(new TextCell()) {
#Override
public String getValue(EnergyOfferDTO energyOffer) {
final String result = obtainMwValue(colIndex, energyOffer);
return result;
}
};
}
return mwColumn;
}
private String obtainMwValue(final int colIndex, EnergyOfferDTO energyOffer) {
String result = "";
if (energyOffer != null) {
final List<OfferPriceMwPair> offerPriceCurve = energyOffer.getCurve();
final int numberOfPairs = offerPriceCurve.size();
if (colIndex < numberOfPairs) {
final PriceMwPair offerPriceMwPair = offerPriceCurve.get(colIndex);
if (offerPriceMwPair != null) {
final BigDecimal mw = offerPriceMwPair.getMw();
if (mw != null) {
result = NumberFormat.getDecimalFormat().format(mw);
}
}
}
}
return result;
}
}
All that custom work w.r.t. WrapperCell and CompositeValidatableColumn was unnecessary.
It turns out that there's a way you should not construct CompositeCells. See http://code.google.com/p/google-web-toolkit/issues/detail?id=5714. My CompositeCells were not receiving events. So, I changed the way I construct them in ToggleableGrid.
protected CompositeCell<T> generateCompositeCell(final List<HasCell<T, String>> hasCells) {
final CompositeCell<T> compositeCell = new CompositeCell<T>(hasCells) {
// to not run afoul of http://code.google.com/p/google-web-toolkit/issues/detail?id=5714
#Override
public void render(Context context, T value, SafeHtmlBuilder sb) {
sb.appendHtmlConstant("<div style=\"display: inline\">");
super.render(context, value, sb);
sb.appendHtmlConstant("</div>");
}
#Override
protected Element getContainerElement(Element parent) {
// Return the first element in the DIV.
return parent.getFirstChildElement();
}
};
return compositeCell;
}
After that change and incorporating my other validation-oriented classes: ValidatableFieldUpdater, AbstractValidatableColumn (and derivatives), ValidatableInputField and ConversionResult, life couldn't be more grand!