watchlistboxviewer.java

EclipseTrader is a stock exchange analysis system, featuring shares pricing watch, intraday and hi

        
        Control[] items = content.getChildren();
        for (int i = 0; i < items.length; i++)
            items[i].dispose();
        
        for (Iterator iter = getView().getWatchlist().getItems().iterator(); iter.hasNext(); )
        {
            WatchlistItem watchlistItem = (WatchlistItem)iter.next();
            BoxViewItem viewItem = new BoxViewItem(content, SWT.NONE, watchlistItem);
            viewItem.setBackground(background);
            viewItem.setForeground(foreground);
            viewItem.setPositiveForeground(positiveForeground);
            viewItem.setNegativeForeground(negativeForeground);
        }

        content.setRedraw(true);
        content.layout();
    }

    /* (non-Javadoc)
     * @see net.sourceforge.eclipsetrader.trading.views.AbstractWatchlistView#update(java.util.Observable, java.lang.Object)
     */
    public void update(Observable o, Object arg)
    {
        content.getDisplay().asyncExec(new Runnable() {
            public void run()
            {
                if (!content.isDisposed())
                    updateView();
            }
        });
    }

    /* (non-Javadoc)
     * @see net.sourceforge.eclipsetrader.trading.views.AbstractWatchlistView#itemAdded(java.lang.Object)
     */
    public void itemAdded(Object o)
    {
        if (o instanceof WatchlistItem)
        {
            WatchlistItem watchlistItem = (WatchlistItem)o;
            BoxViewItem viewItem = new BoxViewItem(content, SWT.NONE, watchlistItem);
            viewItem.setBackground(background);
            viewItem.setForeground(foreground);
            viewItem.setPositiveForeground(positiveForeground);
            viewItem.setNegativeForeground(negativeForeground);
            content.layout();
        }
    }

    /* (non-Javadoc)
     * @see net.sourceforge.eclipsetrader.trading.views.AbstractWatchlistView#itemRemoved(java.lang.Object)
     */
    public void itemRemoved(Object o)
    {
        Control[] items = content.getChildren();
        for (int i = 0; i < items.length; i++)
        {
            BoxViewItem tableItem = (BoxViewItem)items[i];
            if (tableItem.getWatchlistItem().equals(o))
            {
                tableItem.dispose();
                content.layout();
                break;
            }
        }
    }
    
    /* (non-Javadoc)
     * @see net.sourceforge.eclipsetrader.trading.internal.AbstractLayout#getItemIndex(org.eclipse.swt.graphics.Point)
     */
    public int getItemIndex(Point point)
    {
        return -1;
    }

    protected void setTheme(ITheme theme)
    {
        positiveForeground = theme.getColorRegistry().get(POSITIVE_FOREGROUND);
        negativeForeground = theme.getColorRegistry().get(NEGATIVE_FOREGROUND);
        foreground = theme.getColorRegistry().get(FOREGROUND);
        background = theme.getColorRegistry().get(BACKGROUND);
        theme.addPropertyChangeListener(themeChangeListener);
    }

    /* (non-Javadoc)
     * @see net.sourceforge.eclipsetrader.trading.internal.AbstractLayout#getSelection()
     */
    public WatchlistItem[] getSelection()
    {
        if (selectedItem != null)
            return new WatchlistItem[] { selectedItem };
        else
            return new WatchlistItem[0];
    }
    
    private class BoxViewItem extends Box implements DisposeListener, Observer
    {
        private WatchlistItem watchlistItem;
        private Double lastValue;
        private MenuManager menuMgr;

        public BoxViewItem(Composite parent, int style, WatchlistItem watchlistItem)
        {
            super(parent, style);
            addDisposeListener(this);
            setWatchlistItem(watchlistItem);
            addSelectionListener(selectionListener);

            menuMgr = new MenuManager("#popupMenu", "popupMenu"); //$NON-NLS-1$ //$NON-NLS-2$
            menuMgr.setRemoveAllWhenShown(true);
            menuMgr.addMenuListener(new IMenuListener() {
                public void menuAboutToShow(IMenuManager menuManager)
                {
                    menuManager.add(new Separator("top")); //$NON-NLS-1$
                    menuManager.add(new Separator("search")); //$NON-NLS-1$
                    getView().fillMenuBars(menuManager);
                    menuManager.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS));
                    menuManager.add(new Separator("bottom")); //$NON-NLS-1$
                }
            });
            getView().getSite().registerContextMenu(menuMgr, getView().getSite().getSelectionProvider());
            setMenu(menuMgr.createContextMenu(this));
        }
        
        WatchlistItem getWatchlistItem()
        {
            return watchlistItem;
        }

        void setWatchlistItem(WatchlistItem watchlistItem)
        {
            if (this.watchlistItem != null)
                this.watchlistItem.deleteObserver(this);
            this.watchlistItem = watchlistItem;

            updateDisplay();
            
            this.watchlistItem.addObserver(this);
        }
        
        private void updateDisplay()
        {
            Security security = watchlistItem.getSecurity();
            setName(security.getDescription());
            Quote quote = security.getQuote();
            if (quote != null)
            {
                double last = CurrencyConverter.getInstance().convert(quote.getLast(), security.getCurrency(), watchlistItem.getParent().getCurrency());
                double close = CurrencyConverter.getInstance().convert(security.getClose(), security.getCurrency(), watchlistItem.getParent().getCurrency());
                setValue(numberFormatter.format(last));
                if (security.getClose() != null)
                {
                    double change = last - close;
                    double percentage = change / close * 100;
                    String prefix = "";
                    if (change > 0)
                        prefix = "+";
                    setChange(prefix + numberFormatter.format(change) + " (" + prefix + percentageFormatter.format(percentage) + "%)");
                }
                if (quote.getDate() != null)
                    setTime(formatter.format(quote.getDate()));
                if (lastValue != null)
                {
                    if (quote.getLast() > lastValue.doubleValue())
                        setImage(up);
                    else if (quote.getLast() < lastValue.doubleValue())
                        setImage(down);
                    else
                        setImage(equal);
                }
                lastValue = new Double(quote.getLast());
            }
            getParent().layout(true, true);
        }
        
        /* (non-Javadoc)
         * @see java.util.Observer#update(java.util.Observable, java.lang.Object)
         */
        public void update(Observable o, Object arg)
        {
            getDisplay().asyncExec(new Runnable() {
                public void run()
                {
                    if (!isDisposed())
                        updateDisplay();
                }
            });
        }

        /* (non-Javadoc)
         * @see org.eclipse.swt.events.DisposeListener#widgetDisposed(org.eclipse.swt.events.DisposeEvent)
         */
        public void widgetDisposed(DisposeEvent e)
        {
            if (watchlistItem != null)
                watchlistItem.deleteObserver(this);
            if (menuMgr != null)
                menuMgr.dispose();
        }
    }
}