ArcGIS Engine Developer Guide

BUILDING APPLICATIONS WITH C++ AND CONTROL WIDGETS
{
}
void MapControlEvents::OnViewRefreshed(VARIANT ActiveView, long viewDrawPhase,
VARIANT layerOrElement,
VARIANT envelope)
{
}
14. These events need to be listened for as well.
a. First, include the necessary header file in MapViewer.h.
#include "TransformEvents.h"
#include "MapControlEvents.h"
b. Listen for the events from MapViewer.cpp in the same way you did for the
other controls.
IEventListenerHelperPtr g_ipTransEventHelper;
MapControlEvents* g_mapEvents;
IEventListenerHelperPtr g_ipMapControlEvent2Helper;
…
int main (int argc, char* argv[])
{
…
g_ipTransEventHelper->Startup(
static_cast (g_transEvents));
g_mapEvents = new MapControlEvents();
g_ipMapControlEvent2Helper.CreateInstance(
CLSID_MapControlEvents2Listener);
g_ipMapControlEvent2Helper->Startup(
static_cast (g_mapEvents));
g_ipMapControlEvent2Helper->AdviseEvents(g_ipMapControl, NULL);
…
}
15. Clean up the map’s events in CloseAppCallback as you did for the other events.
// End event listening
g_ipPageLayoutControlEventHelper->UnadviseEvents();
g_ipPageLayoutControlEventHelper->Shutdown();
g_ipPageLayoutControlEventHelper = 0;
delete g_pageLayoutEvents;
g_ipTOCControlEventHelper->UnadviseEvents();
g_ipTOCControlEventHelper->Shutdown();
g_ipTOCControlEventHelper = 0;
delete g_tocEvents;
g_ipTransEventHelper->UnadviseEvents();
g_ipTransEventHelper->Shutdown();
Chapter 6 • Developer scenarios • 391