ArcGIS Engine Developer Guide

BUILDING APPLICATIONS WITH WINDOWS CONTROLS
use the ITransformEvents interface of the PageLayoutControl focus map. Add
the following code to the PageLayoutControl_OnPageLayoutReplaced event
handler directly above the load document code.
private void axPageLayoutControl1_OnPageLayoutReplaced(object sender,
ESRI.ArcGIS.PageLayoutControl.IPageLayoutControlEvents_OnPageLayoutReplacedEvent
e)
{
// Get the IActiveView of the focus map in the PageLayoutControl.
IActiveView activeView = (IActiveView)
axPageLayoutControl1.ActiveView.FocusMap;
// Trap the ITransformEvents of the PageLayoutControl's focus map.
visBoundsUpdatedE = new
ITransformEvents_VisibleBoundsUpdatedEventHandler(OnVisibleBoundsUpdated);
((ITransformEvents_Event)activeView.ScreenDisplay.
DisplayTransformation).VisibleBoundsUpdated += visBoundsUpdatedE;
// Get the extent of the focus map.
m_Envelope = activeView.Extent;
// Load the same preauthored map document into the MapControl.
axMapControl1.LoadMxFile(axPageLayoutControl1.DocumentFilename,null,
null);
// Set the extent of the MapControl to the full extent of the data.
axMapControl1.Extent = axMapControl1.FullExtent;
}
6. Display the form in design mode and select axMapControl1 from the Properties
window and display the axMapControl events. Double-click
OnAfterDraw to add an event handler to the code window.
7. Add the following code to the axMapControl_OnAfterDraw event handler to
draw the envelope with the symbol you created earlier onto the MapControl’s
display.
private void axMapControl1_OnAfterDraw(object sender,
ESRI.ArcGIS.MapControl.IMapControlEvents2_OnAfterDrawEvent e)
{
if (m_Envelope == null)
{
return;
}
// If the foreground phase has drawn
esriViewDrawPhase viewDrawPhase = (esriViewDrawPhase) e.viewDrawPhase;
if (viewDrawPhase == esriViewDrawPhase.esriViewForeground)
{
IGeometry geometry = m_Envelope;
axMapControl1.DrawShape(geometry, ref m_FillSymbol);
}
}
346 • ArcGIS Engine Developer Guide