I have this code and do action is never fired
TextBox textbox = new TextBox();
textbox .addValueChangeHandler(new ValueChangeHandler<String>() {
#Override
public void onValueChange(ValueChangeEvent<String> event) {
//do action
}
});
what am I doing wrong ?
One information a forgot the textBox was setEnable(true), is for this reason i don't use other handler.
I find a solution the way to fire the event is when the textBox was set and for that i use coutTotal.setText("someText") but for fire the event i need to use coutTotal.setValue("sometext", true)
private void computeTotal() {
Double total = 0.0;
for (int i = 0; i < discloserPanel.getWidgetCount(); i++) {
if (discloserPanel.getWidget(i) instanceof LigneCout) {
LigneCout ligneCout = (LigneCout) discloserPanel.getWidget(i);
total += ligneCout.getSousTotal();
}
}
coutTotal.setValue(FormHelper.prepareDoubleForForm(total, 0), true);
}
Related
We would like to implement AutoCompleteTextField field, once user has selected the field from AutoComplete result, then system would auto populate on other text field, i have used the component AjaxFormComponentUpdatingBehavior (blur), however this will take effect on every text input from AutoCompleteTextField field, but if i change to AjaxFormComponentUpdatingBehavior (change), it doesnt work.
Below is the sample code:
AutoCompleteTextField<String> field_postcode = new AutoCompleteTextField<String>("field_postcode",
new PropertyModel<String>(getModelObject(), "wAdditionalInfo.postal"), autoCompleteRenderer) {
private static final long serialVersionUID = 1L;
#Override
protected Iterator<String> getChoices(String input) {
if (Strings.isEmpty(input)) {
List<String> emptyList = Collections.emptyList();
return emptyList.iterator();
}
List<String> choices = new ArrayList<String>();
List<Postcode> postcodeList = getProfileManager().findAllPostcodeByPostcode(input);
for (Postcode p : postcodeList) {
String postcode = p.getPostcode();
if (postcode.startsWith(input)) {
choices.add(p.getPostcode());
if (choices.size() == 10) {
break;
}
}
}
return choices.iterator();
}
};
field_postcode.setRequired(true);
field_postcode.add(new AjaxFormComponentUpdatingBehavior("blur"){
private static final long serialVersionUID=-1107858522700306810L;
#Override protected void onUpdate( AjaxRequestTarget target){
Postcode postcode = getProfileManager().findPostcodeByPostcode(field_postcode.getInput());
if (postcode != null) {
City city = postcode.getCity();
State state = city.getState();
field_city.setModelObject(city.getCity());
ddl_state.setModelObject(state);
if (isDisplayTip) {
//isDisplayTip true mean is from widrawal webform
isReadonly = true;
} else {
field_city.setEnabled(false);
}
ddl_state.setEnabled(false);
} else {
if (isDisplayTip) {
isReadonly = false;
} else {
field_city.setEnabled(true);
}
ddl_state.setEnabled(true);
}
target.add(field_city, ddl_state);
}
}
);
Is there any api from wicket to achieve this? We need to have something when user select the option from Auto complete, then it only onUpdate method of AjaxFormComponentUpdatingBehavior
According to https://github.com/apache/wicket/blob/cbc237159c4c6632b4f7db893c28ab39d1b40ed4/wicket-extensions/src/main/java/org/apache/wicket/extensions/ajax/markup/html/autocomplete/wicket-autocomplete.js#L620 it should trigger change event on the HTMLInputElement and thus notify you on the server side.
Use the browser debugger to see whether https://github.com/apache/wicket/blob/cbc237159c4c6632b4f7db893c28ab39d1b40ed4/wicket-extensions/src/main/java/org/apache/wicket/extensions/ajax/markup/html/autocomplete/wicket-autocomplete.js#L453 is executed and whether it leads to an Ajax call with the value in the parameters.
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.
I added double click event for DataGrid, but it doesn't work correctly. The code handles a single click, but it does not handle double click.
Please help.
private DataGrid<Contract> table = new DataGrid<Contract>();
table.addCellPreviewHandler(new Handler<Contract>() {
#Override
public void onCellPreview(final CellPreviewEvent<Contract> event) {
if (BrowserEvents.DBLCLICK.equals(event.getNativeEvent().getType())) {
//it doesn't handle
Window.alert("Tro-lo-lo");
}
if (BrowserEvents.CLICK.equals(event.getNativeEvent().getType())) {
//it handles
Window.alert("Tru-la-la");
}
}
});
DataGrid has many things in common with CellTable. So solutions from this question must work for you too:
Using CellPreviewHandler count time between two clicks
Or you can add DoubleClickHandler using addDomHandler method
dataGrid.addDomHandler(new DoubleClickHandler() {
#SuppressWarnings("unchecked")
#Override
public void onDoubleClick(DoubleClickEvent event) {
DataGrid<YourDataProviderType> grid = (DataGrid<YourDataProviderType>) event.getSource();
int row = grid.getKeyboardSelectedRow();
YourDataProviderType item = grid.getVisibleItem(row);
Window.alert("Do Something Here");
}
}, DoubleClickEvent.getType());
How to add an event handler on all div elements with GWT?
I tried the following code but the window alerts are not fired up (But "etvoila" class is set up):
private NodeList<Element> pageDIVElements;
public void initDiv() {
MyDIVEventHandler handler = new MyDIVEventHandler();
pageDIVElements = Document.get().getElementsByTagName("div");
for (int i = 0; i < pageDIVElements.getLength(); i++) {
Element elem = pageDIVElements.getItem(i);
elem.addClassName("etvoila");
com.google.gwt.user.client.Element castedElem = (com.google.gwt.user.client.Element) elem;
DOM.setEventListener(castedElem, handler);
}
class MyDIVEventHandler implements EventListener {
private Element divElement;
#Override
public void onBrowserEvent(Event event) {
Window.alert("Yeepee");
if (event.equals(Event.ONMOUSEOVER)) {
Window.alert("ONMOUSEOVER");
divElement = Element.as(((NativeEvent) event).getEventTarget());
divElement.setPropertyString("background-color", "#C6D4E6");
} else if (event.equals(Event.ONMOUSEOUT)) {
divElement = Element.as(((NativeEvent) event).getEventTarget());
divElement.setAttribute("background-color", "");
}else if (event.equals(Event.ONCLICK)) {
divElement = Element.as(((NativeEvent) event).getEventTarget());
divElement.setAttribute("background-color", "");
Window.alert("ONCLICK");
}
}
}
What is wrong in this method?
Looks like you negelected to sink the events that you want the listener to be notified of.
In this case for example I would add the following into initDiv to element or the relevant children.
DOM.sinkEvents(elem, Event.ONCLICK | Event.ONMOUSEOUT | Event.ONMOUSEOVER);
Similarly to this question, you can wrap it in a Label.
NodeList<Element> elems = Document.get().getElementsByTagName("div");
for (int i = 0; i < elems.getLength(); i++) {
Element elem = elems.get(i);
Label l = Label.wrap(elem);
l.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent event) {
Window.alert("yay!");
}
});
}
I am trying to get a proper method for days to select multiple cells in a flextable's column.
So far i only managed to do it with clicks which works well, but a drag selection would be much better. I have been reading docs and searching, but all the stuff i found was based on deprecated code. I use GWT 2.0 .
I know i need some event handler which would run when drag selection mouse gesture occurs, and that handler needs to know the cell's index where the selection start and of course the cell's index where the selection ends.
Any advice || code would be much appreciated.
This needs to be improved but it should give you the basic idea. First you need to create a CustomTable that listens to MouseEvents. You can do this by extending composite to wrap a focuspanel and a flextable as such :
public class CustomTable extends Composite implements MouseDownHandler, MouseMoveHandler, MouseUpHandler{
List<CellWidget> widgets = new ArrayList<CellWidget>();
FlexTable table = new FlexTable();
FocusPanel focusPanel = new FocusPanel();
boolean selecting= false;
Point selectStart,selectEnd;
public CustomTable(){
focusPanel.setWidget(table);
focusPanel.addMouseDownHandler(this);
focusPanel.addMouseMoveHandler(this);
focusPanel.addMouseUpHandler(this);
initWidget(focusPanel);
}
public void setWidget(int row, int column, CellWidget widget){
widgets.add(widget);
table.setWidget(row, column, widget);
}
#Override
public void onMouseUp(MouseUpEvent event) {
event.preventDefault();
if (selecting){
selecting=false;
DOM.releaseCapture(this.getElement());
selectEnd = new Point(event.getClientX(),event.getClientY());
for (CellWidget widget : widgets){
if (widget.isIn(selectStart,selectEnd))
widget.say();
}
selectStart = selectEnd = null;
}
}
#Override
public void onMouseMove(MouseMoveEvent event) {
event.preventDefault();
if (selecting){
//do some fancy layout
}
}
#Override
public void onMouseDown(MouseDownEvent event) {
event.preventDefault();
selecting = true;
DOM.setCapture(this.getElement());
selectStart = new Point(event.getClientX(),event.getClientY());
}
}
Next you define a CellWidget which basically encapsulates what you would like to add to your cells. When added to DOM, CellWidget calculates and stores its position later to determine if it is in the selected area :
public class CellWidget extends Composite{
Widget content;
Point topLeft,topRight,bottomLeft,bottomRight;
public CellWidget(Widget w){
this.content = w;
initWidget(w);
}
#Override
protected void onLoad() {
topLeft = new Point(getAbsoluteLeft(),getAbsoluteTop());
topRight = new Point(getAbsoluteLeft()+getOffsetWidth(),getAbsoluteTop());
bottomLeft = new Point(getAbsoluteLeft(),getAbsoluteTop()+getOffsetHeight());
bottomRight = new Point(getAbsoluteLeft()+getOffsetWidth(),getAbsoluteTop()+getOffsetHeight());
}
public void say(){
Window.alert(content + " is selected!");
}
public boolean isIn(Point start, Point end){
if (topLeft.isBetween(start, end) || topRight.isBetween(start, end)
|| bottomLeft.isBetween(start, end) || bottomRight.isBetween(start, end))
return true;
else
return false;
}
}
A simple point implementation to make things easier :
public class Point {
int x,y;
public Point(int x,int y){
this.x=x;
this.y=y;
}
public int getX() {
return x;
}
public int getY() {
return y;
}
#Override
public String toString() {
return x+","+y;
}
public boolean isBetween(Point p1,Point p2){
if (p1.getX() < x && p2.getX() > x && p1.getY() < y && p2.getY() > y)
return true;
return false;
}
}
Finally at your EntryPoint module you wrap things up by :
public void onModuleLoad() {
RootPanel rootPanel = RootPanel.get();
CustomTable table = new CustomTable();
table.setWidget(0, 0, new CellWidget(new Label("hello 0,0")));
table.setWidget(0, 1, new CellWidget(new Label("hello 0,1")));
table.setWidget(1, 0, new CellWidget(new Label("hello 1,0")));
table.setWidget(1, 1, new CellWidget(new Label("hello 1,1")));
rootPanel.add(table);
}
I know that the actual logic to determine if the widgets fall within the selected area is incomplete and needs to be improved but i think this solution is clear enough to give the basic idea. Cheers