I'm using UploadItem, RadioGroupItem and some other widgets. RadioButton is having onChangeHandler which will decide what all other components need to be displayed. I've uploaded some file using UploadItem. Then I changed the radio button selection. On changing the radio button, required widgets are getting displayed properly but whatever file I'd selected using UploadItem is going away. Fresh UploadItem widget is getting displayed. In other words page is getting refreshed.
My requirement is whenever I change radio button option, required widget should displayed along with that whatever file I had selected using UploadItem should remain same.
My Code is something like this:
UploadItem upload = new UploadItem();
RadioGroupItem radioGroup = new RadioGroupItem();
HashMap map = new HashMap();
map.put("option1","option1");
map.put("option2","option2");
radioGroup.setValueMap(map);
TextItem textbox = new TextItem();
radioGroup.addChangeHandler(new ChangeHandler(){
public void onChanged(ChangedEvent event) {
String radioValue =((String)event.getValue());
if(radioValue.equalsIgnoreCase("option2")){
textbox.show();
}else{
textbox.hide();
}
}
});
Add all created widgets to DynamicForm object using dynamicForm.setFields(all created widgets)
Changing the radio button should hide and show the textBox. But while doing that page is getting refreshed and whatever file we had selected using UploadItem is lost.
As per the documentation for hide() and show() of FormItem class, invocation of any of these methods, will cause the DynamicForm to be redrawn.
So it may cause the problem you're getting.
To overcome this issue, I would suggest you to put UploadItem in a separate DynamicForm.
fire an event on radio Selection change as
radioButton.addListener(Events.Change, new Listener<BaseEvent>() {
#Override
public void handleEvent(BaseEvent be) {
if(radioButton.getValue()){
//fire an event here for ur widget
}
}
});
Related
I have a listView and setting multiChoiceModeListener on it. It works fine. Now to play an audio item inside the listView I have written
ViewHolder.AuidoXmlLayoutItem.setOnClickListener({...playAudioCode...});
inside the getView of listView adapter class.
because of this now the multiChoiceModeSelection dosent not show selection of listItem when I longPress on AuidoXmlLayoutItem and hence does not show ContextualActionBar.
How can I keep the onClick of the audio item layout and still allow ContextualActionBar to appear on long click of audio item layout
Try to use OnItemClickListener rather than OnClickListener. Follow this way,
view.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// playAudioCode
// change the checkbox state
ViewToChecked checkedTextView = ((ViewToChecked)view);
checkedTextView.setChecked(!checkedTextView.isChecked());
}
});
You might get a concept.
I'm probably doing something else wrong but I've followed examples given here:
How to remove a row from the Cell Table
and
GWT get CellTable contents for printing or export
to accomplish my goal and the result is close but not quite right.
I have a page with two widgets. The first wiget contains a CellTable that uses an aSync ListDataProvider to pull results and populate a table. The table has a selection change event handler associated with it that loads further details about the selected item into the second widget below it.
public OrderAdminTable() {
selectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {
#Override
public void onSelectionChange(SelectionChangeEvent event) {
OrderAdminListProxy selected = selectionModel.getSelectedObject();
if (selected != null && orderSnapShot != null) {
orderSnapShot.loadSnapShot(selected);
}
}
});
initTable();
this.addStyleName("order-list fixed_headers BOM");
this.setSelectionModel(selectionModel);
}
Once the second widget has loaded the details about the selected item, the user can remove the item from the table/list by clicking a button in the RootPanel that is the parent of both widgets.
searchView.getCmdReview().addClickHandler(new ClickHandler() {
#Override public void onClick(ClickEvent event) {
searchView.getOrderAdminSnapshot().reviewOrder();//this line calls a web service that deletes the item from the server data
dataProvider.getList().remove(searchView.getOrderAdminSnapshot().getSelectedOrder());
for(int i=0;i<table.getRowCount();i++){
TableRowElement row = table.getRowElement(i);
for(int j=0;j<row.getCells().getLength();j++){
if(row.getCells().getItem(j).getInnerText().contains(searchView.getOrderAdminSnapshot().getSelectedOrder().getSalesOrderNumber())){
row.setAttribute("removed", "true");
row.addClassName("hidden");
}
}
}
}
});
This all works fine until you select another item in the table. When that happens, the selection change event seems to redraw the table and remove my custom attribute and class from the previously selected item. This makes it appear in the list again.
The ultimate goal here is to avoid a round trip to the server to pull new results when you remove an item from the list. The line "searchView.getOrderAdminSnapshot().reviewOrder();" makes a web service call that removes the item from the data on the server side so it does not appear in subsequent reloads.
Is there some way to force the selection change event to maintain the state of the table row that was previously selected? Is there a better way to remove the selected item from the list? Any advice would be appreciated.
Once you remove the object from the list dataProvider.getList().remove, it should disappear from the table. There is no need to hide the row - this row should be gone. So your loop should never find it.
I'm having a problem using a GWT listbox. I have a case where the user selects a value from a listBox, but it can become invalidated if they change data in a related field. To validate the listBox, the user has to either select a new value, or confirm their old selection by selecting the same value again. I can't figure out how to determine if they have selected the same value so that I can restyle the listBox to look validated.
The valueChanged handler only detects if a new value is selected. The clickHandler and focusHandler fire too often because they fire when the user isn't selecting a value. Any ideas?
You can improve the clickHandler with something like this :
ignoreClick = true;
lastSelection = -1 ;
....
listBox.addClickHandler(new ClickHandler() {
#Override
public void onClick(ClickEvent event) {
if (!ignoreClick) {
lastSelection = listBox.getSelectedIndex();
}
ignoreClick = !ignoreClick;
}
});
I tried it and the event was only fired if you selected an item. But you should rethink your user interface , like said above.
I'm using a GWT library (gwt-openlayers) which allows me to create a map popup containing arbitrary HTML, similar to Google Maps. I need this HTML to contain a GWT Button widget.
I'm creating some HTML elements on-the-fly like this:
Element outerDiv = DOM.createDiv();
outerDiv.getStyle().setOverflow(Overflow.HIDDEN);
outerDiv.getStyle().setWidth(100, Unit.PCT);
outerDiv.appendChild(new HTML(mapPOI.getHtmlDetails()).getElement());
Button popupButton = new Button("View Property");
popupButton.getElement().getStyle().setFloat(com.google.gwt.dom.client.Style.Float.RIGHT);
outerDiv.appendChild(popupButton.getElement());
Then I'm getting the source HTML for these elements by calling
String src = outerDiv.toString();
and inserting this html into my map marker. Now my map marker displays the content ok, including the button. However, the button won't respond to any events! From what I can gather, this is because the buttons onAttach() method is never being called.
Is there a better way to do this?
Thanks,
Jon
~~~~EDIT~~~~
I'm now trying a new way of doing this, which seems to be the accepted method looking at other similar posts.
First I'm creating my div:
String divId = "popup-" + ref;
String innerHTML = "<div id=\"" +divId + "\"></div>";
Then I'm adding this to my map popup and displaying it (which adds it to the DOM). After the popup has been displayed, I'm getting the Element as follows and trying to wrap a HTMLPanel around it:
Element element = Document.get().getElementById(divId);
HTMLPanel popupHTML = HTMLPanel.wrap(element);
My div element is successfully retrieved. However, HTMLPanel.wrap(element); doesn't complete. The reason for this is that wrap(..) calls RootPanel.detachOnWindowClose(Widget widget), which includes the following assertions:
assert !widgetsToDetach.contains(widget) : "detachOnUnload() called twice "
+ "for the same widget";
assert !isElementChildOfWidget(widget.getElement()) : "A widget that has "
+ "an existing parent widget may not be added to the detach list";
I put some breakpoints in and it seems that the 2nd assertion is failing!
Does anybody have any idea why this might be the case? Should failing this assertion really result in a complete failure of the method (no return)?
Your first approach is good, you just need to register onClick event for your button like this:
DOM.sinkEvents(popupButton.getElement(), Event.ONCLICK);
DOM.setEventListener(popupButton.getElement(), new EventListener() {
#Override
public void onBrowserEvent(Event event) {
//implement the logic after click
}
});
I have checked this, it works 100%!
You might try something like
RootPanel.get("idOfYourMapMarker").add(popupButton);
See RootPanel.get()
Unfortunately, RootPanels are AbsolutePanels which aren't so nice for layout but could work if you just have a simple button to add. You could also try RootLayoutPanel which will give you a LayoutPanel (also not so nice when you just want things to flow). You might end up creating a container widget that does the layout for you, and adding that to the RootPanel.
SimplePanel is a DIV. Perhaps that can be used instead?
You added the element, but you have to keep the hierarchy of the actual GWT Widgets too.
I don't see a clean way to do this, but you could use something like jQuery to grab the button by and ID and add a click handler back to it that would call the original click handler.
private static native void registerEvents(String buttonId, MyClass instance)/*-{
var $ = $wnd.$;
//check click
$('#'+buttonId).live('click', function(e) {
e.preventDefault();
instance.#com.package.MyClass::handleButtonClick(Lcom/google/gwt/event/dom/client/ClickEvent;)(null);
});
}-*/;
Call this registerEvents() either in your onAttach or constructor.
I once had a similar problem. You can use the gwt-openlayer's MapWidget as follows:
private MapWidget createMapWidget() {
final MapOptions defaultMapOptions = new MapOptions();
defaultMapOptions.setDisplayProjection(DEFAULT_PROJECTION);
defaultMapOptions.setNumZoomLevels(TOTAL_ZOOM_LEVELS);
MapWidget mapWidget = new MapWidget(MAP_WIDGET_WIDTH, MAP_WIDGET_HEIGHT, defaultMapOptions);
map = mapWidget.getMap();
return mapWidget;
}
And then add it to any panel be it vertical or horizontal.
MapWidget mapWgt = createMapWidget();
VerticalPanel mainPanel = new VerticalPanel();
mainPanel.add(mapWgt);
...
... add whatever you want
...
You can finally add the created Panel(containing the MapWidget and the gwt widget) to the PopupPanel. Also, you should now be able to add handlers to the gwt button.
I want to click on an image and therefore want to register (e.g.) a ClickHandler. The image I get from a ClientResource. This works so far to set the image into a table cell:
MyResources.INSTANCE.css().ensureInjected();
Image colorImage = new Image( MyResources.INSTANCE.colorImage() );
Element colorImageElement = colorImage.getElement();
colorImage.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
System.out.println( event );
}
} );
TableElement table = Document.get().createTableElement();
TableRowElement headRow = table.insertRow(-1);
headRow.insertCell(-1).appendChild( colorImageElement );
RootPanel.get().getElement().appendChild( table );
How can I add a listener to the icon? I tried ClickHandler and to put the image on a PushButton and get the Element from this PushButton but all don't work.
But mind, if I add the widget (Image is a Widget) to a panel it works!
RootPanel.get().add( colorImage );
But I am not working with widgets here but with the Element. So the handler disappears and that's the point I don't get how to preserve this added handler information.
In the end I would like to build a table with different rows where I can click on the icon I get a popup menu and thereby change the colour of the row.
You should be able to just add a ClickHandler (or a MouseDownHandler if that fits your needs better).
Like this:
colorImage.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
// Do something....
}
});
Don't unwrap your widget and append only the DOM elements. The Widget class allows your code to refer to both elements and events at the same time, and deals with possible memory leaks, as well as grouping your code in logical ways.
This might make sense for other frameworks, but in GWT you almost always want to work with the Widgets directly, adding them together, then appending them to the RootPanel.
If you really want to use a html table to build this up, look at the com.google.gwt.user.client.ui.HTMLTable subclasses, com.google.gwt.user.client.ui.Grid and com.google.gwt.user.client.ui.FlexTable. This probably should never be necessary, unless you are adding multiple items to the table - when trying to specify layouts, use actual layout classes.
did you tried to add image.sinkEvents( Event.ONCLICK | Event.MOUSEEVENTS )?
The image has to be inside a focus widget. I don't know why that is, but somewhere the events don't get propagated right and the DOM events don't fire.