I'm trying to use the new GWT CellTable widget but my table needs to support one row expansion, i.e. there is a zippy on the left of a row and when it's clicked, the row should expand to provide more detail information and this row should span across all columns. Is it possible to achieve this with the CellTable? How do I add a row that spans all columns between other rows dynamically?
Any help will be appreciated!
GWT 2.5 will add a CellTableBuilder with the exact goal of allowing this kind of things.
You can find a live example at http://showcase2.jlabanca-testing.appspot.com/#!CwCustomDataGrid (click on the "show friends" cells)
Can you not make the additional row invisible using getRowElement(int row) and using DOM methods to set display 'none' when rendered and as blank when the button, to show it, is hit.
I am working on the solution too and my plan for now is to use CSS classes + manual styles manipulation to make it look as I need. Not sure if I be able to merry it with GWT though: http://jsfiddle.net/7WFcF/
I took a different approach to solve this same problem.
The basic concept is using dom elements to add and remove rows based on an event. The following code is an abstract extension of CellTable. You'll want to call this method from your event that gets fired from the click to expand a row.
import com.google.gwt.dom.client.Document;
import com.google.gwt.dom.client.Element;
import com.google.gwt.dom.client.NodeList;
public abstract class ActionCellTable<T> extends CellTable<T> {
protected abstract void addActionsColumn();
Integer previousSelectedRow = null;
public void displayRowDetail(int selectedRow, Element e){
//Get the tbody of the Cell Table
//Assumption that we want the first (only?) tbody.
Element tbody = this.getElement().getElementsByTagName("tbody").getItem(0);
//Get all the trs in the body
NodeList<Element> trs = tbody.getElementsByTagName("tr");
//remove previously selected view, if there was one
if(previousSelectedRow!=null){
trs.getItem(previousSelectedRow+1).removeFromParent();
//If the current is further down the list then the current your index will be one off.
if(selectedRow>previousSelectedRow)selectedRow--;
}
if(previousSelectedRow==null || selectedRow != previousSelectedRow){// if the are equal we don't want to do anything else
Element td = Document.get().createTDElement();
td.setAttribute("colspan", Integer.toString(trs.getItem(selectedRow).getChildNodes().getLength()));
td.appendChild(e);
Element tr = Document.get().createTRElement();
tr.appendChild(td);
tbody.insertAfter(tr, trs.getItem(selectedRow));
previousSelectedRow=selectedRow;
} else {
previousSelectedRow=null;
}
}
}
previousSelectedRow is used to track which item is "expanded", this could probably be achieved using classes or IDs. If needed I can elaborate more on the CellTable, events, views, and activities.
Related
I want to control row focus process. I need to show confirm dialog on row focus change in my table.
I tried to do this with rowClassRules property, but as I understood that functionality apply classes when table rendering, after that row classes stop changing
rowClassRules = {
'custom-row-focus': (params) => {
return params.data.id === this.currentSelectedItem.id
}
}
currentSelectedItem set's when I click on the row
Found an answer in docs
https://www.ag-grid.com/javascript-grid-row-styles/#refresh-of-styles
If you refresh a row, or a cell is updated due to editing, the rowStyle, rowClass and rowClassRules are all applied again.
So, when I'm clicking to the row I should make something like that:
onClicked($event: RowClickedEvent) {
$event.node.setData({...$event.data});
}
I have a flextable that gets populated with data from a database.
I want to get the ROW number of the clicked row.
So far I figured out only how to get the value of a particular cell in a particular row. You have to know the position and hard code it which isn't practical.
String test =flexTable.getFlexCellFormatter().getElement(2, 2).getInnerHTML();
System.out.println(test);
How can I create a ClickHandler to get the selected row?
//flexTable is a FlexTable object. Add a ClickHandler to it.
flexTable.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
//gets the index of the cell you clicked on
int cellIndex = flexTable.getCellForEvent(event).getCellIndex();
//gets the index of the row you clicked on
int rowIndex = flexTable.getCellForEvent(event).getRowIndex();
//print statements below will verify
System.out.println("cellIndex "+cellIndex);
System.out.println("rowIndex "+rowIndex);
//gets the value of the selected cell
String test =flexTable.getFlexCellFormatter().getElement(rowIndex,cellIndex ).getInnerHTML();
System.out.println(test);
}
});
The FlexTable supports row spans and column spans, allowing you to layout data in a variety of ways. I think you should use CellTable or a DataGrid or for that matter even a CellList if only single column data is being displayed. To these widgets you can add a selectionhandler to which you can achieve your goal. Refer this it has some pre coded examples.
When I select a row in a CellTable which contains several columns, the whole row gets colored in yellow. It does not depend on which area of the row I click (which column of the row).
What I try to do is to keep the selected row colored in yellow as long as no other row of this very table is selected. At the moment, as soon as I click somewhere else in the browser, the row gets back its original color.
I tried to use a selection model, but this changed nothing. Do you have any advise or is this simply not possible, since the focus is managed by the browser? The behavior is the same in the Google showcase for the CellTable...
The selection model actually does what you want to do: it paints a row blue and the row does not change color if you click elsewhere in the page. (Only when another row is selected)
There are 2 selection models:
One that lets you select only one row, and another one that lets you select multiple rows.
MultiSelectionModel<Row> selectionModel = new MultiSelectionModel<Row>();
table.setSelectionModel(selectionModel);
SingleSelectionModel<Row> selectionModel = new SingleSelectionModel<Row>();
table.setSelectionModel(selectionModel);
The solution of user905374 did actually work. I mentioned in my first post that I already tried the solution with a selectionModel and that it did not work. This was partially true. It does work, but only if the table does NOT contain a CheckboxCell.
Following a working and the not working example. I think this might be a bug, but I am not sure if I miss something.
final CellTable<LicenceDto> licenseTable = new CellTable<LicenceDto>();
final SingleSelectionModel<LicenceDto> selectionModel = new SingleSelectionModel<LicenceDto>();
licenseTable.setSelectionModel(selectionModel);
//--- If I add this column, the selection does work.
Column<LicenceDto, String> workingColumn = new Column<LicenceDto, String>(new TextCell()) {
#Override
public String getValue(LicenceDto object) {
return "Works";
}
};
workingColumn.setFieldUpdater(new FieldUpdater<LicenceDto, String>() {
#Override
public void update(int index, LicenceDto object, String value) {
;
}
});
licenseTable.addColumn(workingColumn);
//--- If I add this column, the selection does NOT work anymore.
Column<LicenceDto, Boolean> notWorkingColumn = new Column<LicenceDto, Boolean>(new CheckboxCell(true, true)) {
#Override
public Boolean getValue(LicenceDto object) {
return object.getEnabled();
}
};
notWorkingColumn.setFieldUpdater(new FieldUpdater<LicenceDto, Boolean>() {
#Override
public void update(int index, LicenceDto object, Boolean value) {
presenter.enableLicense(object, value);
}
});
licenseTable.addColumn(notWorkingColumn);
You can even combine multiple cells and add them to the table (e.g. LinkActionCell etc). As long as there is no CheckboxCell, the blue selection with the SingleSelectionModel does work like a charm. Does anyone see what I do wrong with this CheckboxCell or is there a bug?
UPDATE
It was simply a usage error of me. The problem was that I set handlesSelection to true (second parameter of the CheckboxCell constructor) even thought I don't handle anything. Setting it to false solves the problem.
Bottomline: Use a selection model (e.g. SingleSelectionModel) and do not set the handlesSelection parameter to true of the CheckboxCell constructor to true, if you don't handle the selection by yourself.
You should observe the Showcase demo again. This time use the checkbox on the left most column i.e the first column. On selection the row turns blue indicating the row selection is made. This is when you have SelectionModel set up. Click on the page anywhere outside the CellTable/DataGrid the selection is not changed.
Now, instead of choosing the row via checkbox from first column, you click on a row in any other column. The row turns yellow. Click on the page anywhere outside the CellTable/DataGrid the focus/yellow is lost.
"colored in yellow" indicates row is under focus and being edited and not selected.
Note - you can force row selection by using click events per cell.
Try something like this:
CellTable table;
YourDataObject object = new YourDataObject(...);
SingleSelectionModel<YourDataObject> selectionModel =
new SingleSelectionModel<YourDataObject>();
table.setSelectionModel(selectionModel);
...
table.setSelected(object, true);
Use MultiSelectionModel if you wish more than one line to be highlighted.
Store the selected row's index. When user selects row, change row's style to some "selected-style" appropriate for your case (defined in your css file) and remove selected style from the previously selected row. Also don't forget to update selected row's index.
If you provide some code from the original version I help you out with some code with pleasure.
I have a cell Table in GWT with columns , there are 3 rows in each column, I want the first row to get selected by default when the application starts
some thing like this
mycelltable.setselectedrow(index);
is it possible ?
Thanks
her is the code
display.getShortListedCVsBasedOnJob().getResumeDescriptionColumn().setFieldUpdater(
new FieldUpdater<CandidateSummary, String>() {
public void update(int index, CandidateSummary object,
String value) {
fetchResume(cvSelected, shortListedFlag);
}
});
This fetchResume() method calls but only when i select cell of this column , I want to call this fetchResume() method as my application starts, i.e i want to make the 1st cell of the column to be selected byDefault.
Selection is handled by a SelectionModel, based on objects (not indices); so you have to select the first object from your data in the SelectionModel used by the CellTable (have a look at the Using a key provider to track objects as they change sample code in the Celltable javadoc for an example (last sample before nested classes summary).
This could work?
setSelected(Element elem, boolean selected)
see GWT Documentation
CellTable Google Web Toolkit
Hmm I dont see what´s the Celltable is there. I would set the initial Value like this:
int INITAL_SET_ROW = 0;
TableRowElement initalSetElement = yourCellTable.getRowElement(INITAL_SET_ROW);
yourCellTable.setSelected(initialSetElement, true);
You can try to implement it in you´re main Method. Haven´t tested it tho, hope it helps.
Simply;
List<RowType> source = new LinkedList<RowType>();
//put some data to this list
//populate the table
table.setRowCount(source.size(), true);
table.setRowData(0, source);
//for example, you can select the first row
RowType firstRow = source.get(0);
selectionModel.setSelected(firstRow, true);
I'm trying to update the particular row of a cellTable without loading the page when clicking a button, which is in the same row.
I just want to update the Column1 which is a TextColumn. I want to Change the text of the particular column.
Can anyone help me?
Thanks in Advance,
Gnik
If you want to redraw the whole row, you can use:
celltable.redrawRow(absIndex);
But if you want to update a single cell and performance is important you could do this in a child class of CellTable
public void updateCellContent(int absRowIndex, int cellIndex, String innerHtml) {
TableRowElement tr = getChildElement(absRowIndex);
if (tr != null) {
TableCellElement td = tr.getCells().getItem(cellIndex);
if (td != null) {
td.setInnerHTML(innerHtml);
}
}
}
I suppose you use a ListDataProvider to store as it is used in the showcase example here.
In that case you just have to up change the data in the ListDataProvider and when its done just call
cellTable.redraw();
And don't worry the table doesn't flicker when doing that :)
Take a look at https://stackoverflow.com/a/7109021/787660
When you use the ListDataAdapter and add your row like in the example using the ListWrapper (don't be scared, you use it like a List-Object) the refresh is automatically triggered.