I'm trying to get the event when the user left a record from a listgrid on a treenode in treegrid.
I was trying with
ListGrid messagesGrid = new ListGrid();
messagesGrid.setCanDrag(true);
TreeGrid shortcutsTreeGrid = new TreeGrid();
shortcutsTreeGrid.setCanAcceptDrop(true);
shortcutsTreeGrid.setCanAcceptDroppedRecords(true);
shortcutsTreeGrid.addDropHandler(new DropHandler() {
#Override
public void onDrop(DropEvent dropEvent) {
SC.say("drop event is called"); // I want to catch this event
}
});
Please any idea?
You have to use addFolderDropHandler() when dropping onto a TreeGrid.
For example
treeGrid.addFolderDropHandler(new FolderDropHandler() {
#Override
public void onFolderDrop(FolderDropEvent folderDropEvent) {
SC.say("folder dropped");
}
}
Related
I've an combo box which is composed of a text field and a popup with a CellTable showing the suggestion items. The text field has a change handler that updates the CellTable's selection.
When typing a character and clicking an already selected suggestion, the first click is swallowed. The second click works and triggers the selection via the CellTable.addDomHandler(...).
Any idea why first click is swallowed?
Example code:
private static class SuggestFieldTextAndPopupSandbox extends SimplePanel {
private final TextField mText;
private CellTable<Handle<String>> mTable;
private SingleSelectionModel<Handle<String>> mTableSelection;
private SingleSelectionModel<Handle<String>> mSelection;
private ProvidesKey<Handle<String>> mKeyProvider = new SimpleKeyProvider<Handle<String>>();
private PopupPanel mPopup;
private List<Handle<String>> mData;
public SuggestFieldTextAndPopupSandbox() {
mData = Lists.newArrayList(new Handle<String>("AAA"), new Handle<String>("AAB"), new Handle<String>("ABB"));
mSelection = new SingleSelectionModel<Handle<String>>();
mText = new TextField();
mText.addKeyPressHandler(new KeyPressHandler() {
#Override
public void onKeyPress(KeyPressEvent pEvent) {
mPopup.showRelativeTo(mText);
}
});
mText.addBlurHandler(new BlurHandler() {
#Override
public void onBlur(BlurEvent pEvent) {
mTableSelection.setSelected(startsWith(mText.getValue()), true);
}
});
mText.addChangeHandler(new ChangeHandler() {
#Override
public void onChange(ChangeEvent pEvent) {
mText.setText(mText.getText().toUpperCase());
}
});
mTable = new CellTable<Handle<String>>(0, GWT.<TableResources>create(TableResources.class));
mTable.setTableLayoutFixed(false);
mTableSelection = new SingleSelectionModel<Handle<String>>(mKeyProvider);
mTable.setSelectionModel(mTableSelection);
mTable.addDomHandler(new ClickHandler() {
#Override
public void onClick(final ClickEvent pEvent) {
Scheduler.get().scheduleFinally(new ScheduledCommand() {
#Override
public void execute() {
mSelection.setSelected(mTableSelection.getSelectedObject(), true);
mText.setFocus(true);
mPopup.hide();
}
});
}
}, ClickEvent.getType());
mTable.addColumn(new TextColumn<Handle<String>>() {
#Override
public String getValue(Handle<String> pObject) {
return pObject.get();
}
});
mTable.setRowData(mData);
mPopup = new PopupPanel();
mPopup.setAutoHideEnabled(true);
mPopup.setWidget(mTable);
mPopup.setWidth("200px");
mPopup.setHeight("200px");
VerticalPanel p = new VerticalPanel();
p.add(mText);
setWidget(p);
}
private Handle<String> startsWith(final String pValue) {
final String val = nullToEmpty(pValue).toLowerCase();
int i = 0;
for (Handle<String> item : mData) {
String value = item.get();
if (value != null && value.toLowerCase().startsWith(val)) {
return item;
}
i++;
}
return null;
}
}
I reproduced your issue and here is the problem:
when you click on the suggestions the following is happening:
The text field is loosing focus which causes the corresponding ChangeEvent to be dealt with followed by the BlurEvent.
The click causes the popup to get the focus now which is why it is swallowed.
If you remove the ChangeHandler and the BlurHandler of the text field the issue disappears. But I think I found another solution
Try replacing the DOM handler of the mTable with a selection handler relative to the mTableSelection as follows:
mTableSelection.addSelectionChangeHandler(new Handler(){
#Override
public void onSelectionChange(SelectionChangeEvent event) {
Scheduler.get().scheduleFinally(new ScheduledCommand() {
#Override
public void execute() {
mSelection.setSelected(mTableSelection.getSelectedObject(), true);
mText.setFocus(true);
mPopup.hide();
}
});
}
});
Found a way how to properly solve this.
Skipping the blur handler when user hovers the suggestion list area seemed to fix that issue, at least from the tests that were done didn't see any more issues.
This was necessary because just before the user clicks a suggestion item, the text is blurred and it fires a selection change. This in turn cancels the selection made when user clicks an item.
There is a ContextMenu which has two options and when the second option (item2 in the code) is pressed with the right mousebutton I want it to print out some text so I know I did actually activate it. Up till now nothing happens when I click on the second mousebutton.
I haven't had much experience yet with Eventhandlers so my apologies if I made a noobish mistake.
private void maakContextMenu() {
menu = new ContextMenu();
MenuItem item = new MenuItem("Kleur Assen");
MenuItem item2 = new MenuItem("tweede optie");
final LissajousCanvas canvas = this;
item.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
new KiesKleur(canvas).show();
}
});
item2.addEventHandler(MouseEvent.MOUSE_CLICKED, new EventHandler<MouseEvent>(){
#Override
public void handle(MouseEvent t) {
System.out.println("in the loop");
if(t.getSource()==MouseButton.SECONDARY){
System.out.println("in too deep");
}
new KiesKleur(canvas).show();
}
});
menu.getItems().addAll(item, item2);
}
A MenuItem is not actually a Node, so it's not part of the scene graph in the way that Nodes are. So I'm not really sure if this is a bug or not; I think it probably only implements EventTarget so it can specifically generate ActionEvents. You'll have noticed there is no setOnMouseClicked(...) method available.
Here's a workaround. I'm not sure why it only works with MOUSE_PRESSED and not with MOUSE_CLICKED, but it's likely something to do with the default mouse event handling that generates the action events:
private void maakContextMenu() {
menu = new ContextMenu();
MenuItem item = new MenuItem("", new Label("Kleur Assen"));
Label menuItem2Label = new Label("tweede optie");
MenuItem item2 = new MenuItem("", menuItem2Label);
final LissajousCanvas canvas = this;
item.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
new KiesKleur(canvas).show();
}
});
menuItem2Label.addEventHandler(MouseEvent.MOUSE_PRESSED, new EventHandler<MouseEvent>(){
#Override
public void handle(MouseEvent t) {
System.out.println("in the loop");
if(t.getButton()==MouseButton.SECONDARY){
System.out.println("in too deep");
}
new KiesKleur(canvas).show();
}
});
menu.getItems().addAll(item, item2);
}
I have a CellList in GWT, i need to deselect the cell when one link is clicked without using the selectionchange handler.Can someone help in this situation.
CellList<MyClass> cellList;
SingleSelectionModel<MyClass> lSelectionModel;
final SingleSelectionModel<MyClass> lSelectionModel =
new SingleSelectionModel<MyClass>();
this.cellList.setSelectionModel(lSelectionModel);
public void setSelected(final MyClass pClass) {
Anchor lLink = new Anchor();
lLink.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent pEvent) {
//Here i need to deselect the cell(Myclass)
}
});
}
Thanks in advance,
Raj
Using a SingleSelectionModel, is as easy as:
lLink.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent pEvent) {
MyClass selected = lSelectionModel.getSelectedObject();
if (selected != null) {
lSelectionModel.setSelected(selected, false);
}
});
I have this button cell in my CellTable
ButtonCell reListCell = new ButtonCell();
reListColumn = new Column<EmployerJobs, String>(reListCell) {
#Override
public String getValue(EmployerJobs object) {
return "ReList";
}
};
ctJobs.addColumn(reListColumn,
EmployerDashBoardConstants.EMPTYHEADERCOLUMN);
but i only want this cell to be appear if the below condition pass
public void getDateDiff(final EmployerJobs object) {
rpcService.getDateDiff(object.getJobValidDate(), new AsyncCallback<Boolean>() {
public void onFailure(Throwable caught) {
}
public void onSuccess(Boolean jobExpired) {
if(jobExpired) {
// HERE I WANT TO SHOW MY RELISTCELL, means if the job is expired only then
// there will be a button showing relist would be appear in that row ,for
// the jobs which are not expired NO button should appear..
}
}
});
}
how can i achieve this?
thanks
I agree with DTing.
Quering the backend for each cell/row is not really efficient.
I would rather put the info (jobExpired) into your EmployerJobs class and transfer the info when you request the list of your EmployerJobs to be displayed in your CellTable.
You can update the list periodically to account for changes (see the expenses sample on how to do that).
But to your initial question (hiding the cell). There are two solutions:
Use an ActionCell and override the render method.
ActionCell:
ActionCell<EmployerJobs> reListCell = new ActionCell<EmployerJobs>("ReList",
new ActionCell.Delegate<EmployerJobs>() {
#Override
public void execute(EmployerJobs object) {
// code to be executed
}
})
{
#Override
public void render(Cell.Context context,EmployerJobs value,SafeHtmlBuilder sb) {
if (value.isJobExpired()) // isJobExpired returns the field jobExpired.
super.render(context,value,sb);
}
};
reListColumn = new Column<EmployerJobs, EmployerJobs>(reListCell) {
#Override
public String getValue(EmployerJobs object) {
return object;
}
};
ctJobs.addColumn(reListColumn,
EmployerDashBoardConstants.EMPTYHEADERCOLUMN);
Use a ButtonCell and override the render method of your Column.
ButtonCell:
ButtonCell reListCell = new ButtonCell();
reListColumn = new Column<EmployerJobs, String>(reListCell) {
#Override
public String getValue(EmployerJobs object) {
return "ReList";
}
#Override
public void render(Cell.Context context,EmployerJobs object,SafeHtmlBuilder sb) {
if (value.isJobExpired()) // isJobExpired returns the field jobExpired.
super.render(context,value,sb);
}
};
ctJobs.addColumn(reListColumn,
EmployerDashBoardConstants.EMPTYHEADERCOLUMN);
Just tried Umit solution #2 ButtonCell. It works!
To link an specific action to the button, reListColumn.setFieldUpdater(new FieldUpdater....
would be needed
I tried ButtonCell solution too. But if you click in a cell who as no button then an error on client side occur:
com.google.gwt.core.client.JavaScriptException: (TypeError) #com.google.gwt.core.client.impl.Impl::apply(Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)([JavaScript object(445), JavaScript object(240), JavaScript object(637)]): parent is null
So I added this to override the Event and avoid Event if I want:
#Override
public void onBrowserEvent(com.google.gwt.cell.client.Cell.Context context,
Element parent, YourObject object, NativeEvent event) {
if (object.isCompleted())
super.onBrowserEvent( context, parent, object, event);
}
I don't know if it's the better way to do it but it works.
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;
}