E4 – A New Area For RCP/RIA Applications

It gives the developer the possibility to customize it if he wants to. Please note that all shown above is done using the CURRENT SWT-API no extra stuff was added to make this work.

@Tom

Can I make use of Flash/Flex content to create widgets. Is it possible to have a flash player integration with it ?

I'll try to post a snippet of what we ended up doing... The other thing that I realized along the way with PAW was that initially I was trying to be a standard Windows app, until I realized that there was no more a standard windows app (look at Windows Media Player, MS Office/ribbon UI, Yahoo Messenger, AOL Messenger, etc...).  So the idea behind SWT was to expose Windows widgets (with the window L&F) to the Java developer is no longer as desirable as it was when the UI across applications was still pretty standard. So my view is that perhaps we should pick the new 'best' UI toolkit and make that a first-class citizen - in any case, providing CSS styling means that we're extending the underlying UI toolkits or creating an entirely new one.

Here's an example of a SWT API like wrapper to a browser hosted control.

public class Text implements IBrowserBasedWidget {
    nsIDOMHTMLInputElement        input;
    nsIDOMEventListener            listener;
    ArrayList<IEventHandler>    changeListeners    = new ArrayList<IEventHandler>();
    ArrayList<IEventHandler>    focusListeners    = new ArrayList<IEventHandler>();
    Object                        data;

    public Text() {}
    public Text(nsIDOMElement elem) {
        init(elem);
    }
   
    public String getText() {
        return input.getValue();
    }

    public void setText(String text) {
        if (text == null)
            text = "";
        input.setValue(text);
    }

    public Object getData() {
        return data;
    }

    public void setData(Object data) {
        this.data = data;
    }
   
    public String getId() {
        return input.getId();
    }


    @Override
    public void addListener(EventType type, IEventHandler handler) {
        if (listener == null) {
            listener = new nsIDOMEventListener() {
                @Override
                public void handleEvent(nsIDOMEvent event) {
                    EventData ed = new EventData();
                    ed.widget = Text.this;
                    if (event.getType().compareToIgnoreCase("change") == 0) {
                        ed.type = EventType.change;
                        for (IEventHandler handler : changeListeners)
                            handler.handleEvent(ed);
                    }
                    else if (event.getType().compareToIgnoreCase("focus") == 0){
                        ed.type = EventType.focus;
                        for (IEventHandler handler : focusListeners)
                            handler.handleEvent(ed);
                    }
                }

                @Override
                public nsISupports queryInterface(String classId) {
                    return Mozilla.queryInterface(this, classId);
                }
            };
            nsIDOMEventTarget eventTarget = (nsIDOMEventTarget) input
                    .queryInterface(nsIDOMEventTarget.NS_IDOMEVENTTARGET_IID);
            eventTarget.addEventListener("change", listener, false);
            eventTarget.addEventListener("focus", listener, false);
        }

        if (type == EventType.change)
            changeListeners.add(handler);
        else if (type == EventType.focus)
            focusListeners.add(handler);
    }
   
    public void dispose() {
        nsIDOMEventTarget eventTarget = (nsIDOMEventTarget) input
                .queryInterface(nsIDOMEventTarget.NS_IDOMEVENTTARGET_IID);
        eventTarget.removeEventListener("change", listener, false);
        eventTarget.removeEventListener("focus", listener, false);

        changeListeners.clear();
        focusListeners.clear();
    }

    @Override
    public boolean init(nsIDOMElement element) {
        this.input = (nsIDOMHTMLInputElement) element
                .queryInterface(nsIDOMHTMLInputElement.NS_IDOMHTMLINPUTELEMENT_IID);
        return false;
    }

    @Override
    public void removeListener(EventType type, IEventHandler handler) {
        if (type == EventType.change)
            changeListeners.remove(handler);
        else if (type == EventType.focus)
            focusListeners.remove(handler);
    }
 }

Here's an example of a viewer (note that themethods aren't exactly the same but very similar).

public class ListViewerAdapter {
    int numColumns;
    IStructuredContentProvider contentProvider;
    LabelProvider labelProvider;
    List list;
    Object input;
   
    public ListViewerAdapter(List list) {
        this.list = list;
    }
   
    public void setContentProvider (IStructuredContentProvider provider) {
        this.contentProvider = provider;
    }

    public void setLabelProvider(LabelProvider provider) {
        this.labelProvider = provider;
    }
   
    public void setInput(Object input) {
        this.input = input;
        refresh();
    }
   
    public ISelection getSelection() {
        nsIDOMNodeList items = list.getUnderlyingList().getChildNodes();
        Object[] dataItems = contentProvider.getElements(input);
        if (dataItems == null)
            return null;
       
        for (int i = 0; i < items.getLength(); i++) {
            nsIDOMNode node = items.item(i);
            nsIDOMNode selector = node.getFirstChild();
            nsIDOMHTMLInputElement selectElem = (nsIDOMHTMLInputElement) selector.queryInterface(nsIDOMHTMLInputElement.NS_IDOMHTMLINPUTELEMENT_IID);
            if (selectElem.getChecked()) {
                if (dataItems.length > i)
                    return new StructuredSelection(dataItems[i]);
                else
                    return null;
            }
        }
        return null;       
    }
   
    public void refresh() {
        list.removeAll();
       
        Object[] items = contentProvider.getElements(input);
        if (items == null || items.length == 0)
            return;
   
        for (int i = 0; i < items.length; i++) {
            String value = labelProvider.getText(items[i]);
            list.add(value);
        }
    }

}
 

I'll be happy to share more if it's useful, this isn't the core of our product.

Thanks,
Rajat