Dynamic Map Events

// The following class variables are created for the code snippet below

private boolean bOnce = true;
private int drawPhase;
private IDynamicDisplay dynamicDisplay;
private IDynamicGlyphFactory dynamicGlyphFactory;
private IDynamicSymbolProperties2 dynamicSymbolProps;
private IDynamicGlyph markerGlyph;
private IDisplay display;
private Map map;

//obtain the current map and add the listener to listen to events

//Check is the map is in dynamic mode
if (!map.isDynamicMapEnabled())
    return ;
else{
    map.addIDynamicMapEventsListener(new IDynamicMapEventsAdapter(){

        public void dynamicMapStarted(IDynamicMapEventsDynamicMapStartedEvent event)
            throws IOException, AutomationException{
            System.out.println("Dynamic Map Started"); 
            /*The IDynamicMapEvents.afterDynamicDraw() event is fired
             * only when dynamic rendering takes place. 
             *Therefore to force this event in every draw cycle,
             * the map is refreshed
             */
            map.refresh(); 
        }

        public void beforeDynamicDraw(IDynamicMapEventsBeforeDynamicDrawEvent event)
            throws IOException, AutomationException{
            System.out.println("Before Dynamic Draw Event"); 
        }

        public void afterDynamicDraw(IDynamicMapEventsAfterDynamicDrawEvent event)
            throws IOException, AutomationException{

            //Draw a simple dynamic symbol at a random location in esriDMDPDynamicLayers phase

            if (event.getDynamicMapDrawPhase() ==
                esriDynamicMapDrawPhase.esriDMDPDynamicLayers){
                dynamicDisplay = event.getDynamicDisplay(); display =
                    event.getDisplay(); 
                //Create a simple marker from ICharacterMarkerSymbol
                if (bOnce){

                    dynamicGlyphFactory = dynamicDisplay.getDynamicGlyphFactory();
                        dynamicSymbolProps = (IDynamicSymbolProperties2)
                        dynamicDisplay; 

                    //Create a dynamic glyph from CharacterMarker symbol
                    ICharacterMarkerSymbol markerSymbol = new CharacterMarkerSymbol()
                        ; markerSymbol.setCharacterIndex(72); markerSymbol.setSize
                        (25.0); IColor color = new RgbColor(); color.setRGB(0xFFFFFF)
                        ; markerSymbol.setColor(color); markerGlyph =
                        dynamicGlyphFactory.createDynamicGlyph((ISymbol)markerSymbol)
                        ; bOnce = false;  
                        // Create glyphs only once, since they are expensive
                }

                // Set the properties of the dynamic Symbol
                dynamicSymbolProps.setColor(esriDynamicSymbolType.esriDSymbolMarker,
                    1.0f, 0.0f, 0.0f, 1.0f); dynamicSymbolProps.setDynamicGlyphByRef
                    (esriDynamicSymbolType.esriDSymbolMarker, markerGlyph); 

                //Select a random point in visible bounds
                IEnvelopeGEN visibleExtent = (IEnvelopeGEN)
                    display.getDisplayTransformation().getVisibleBounds(); Random r 
                    = new Random(); double X = visibleExtent.getXMin() +
                    r.nextDouble() * visibleExtent.getWidth(); double Y =
                    visibleExtent.getYMin() + r.nextDouble() *
                    visibleExtent.getHeight(); Point point = new Point();
                    point.putCoords(X, Y); 

                //draw the marker on dynamic display
                dynamicDisplay.drawMarker(point); 
            }
        }

        public void dynamicMapFinished(IDynamicMapEventsDynamicMapFinishedEvent
            event)throws IOException, AutomationException{
            System.out.println("Dynamic Map Finished"); 
        }
    }
        ;
}