ArcGIS Engine Developer Guide

BUILDING APPLICATIONS WITH WINDOWS CONTROLS
4. Build and run the application. To edit a map, layer, heading, or legend class
label in the TOCControl, click it once, then click it a second time to invoke
label editing. Try replacing the label with an empty string. You can use the Esc
key on the keyboard at any time during the edit to cancel it.
Navigating around the focus map using the map
navigation tools will change the extent of the
focus map in the PageLayoutControl and cause
the MapControl to update. Navigating around
the page layout with the page layout navigation
tools will change the extent of the page layout
(not the extent of the focus map in the
PageLayoutControl), so the MapControl will
not update.
Drawing shapes on the MapControl
You will now use the MapControl as an overview window and draw on its
display the current extent of the focus map within the PageLayoutControl. As
you navigate around the data within the data frame of the PageLayoutControl,
you will see the MapControl overview window update.
1. Add the following member variables to the class:
public class Form1 : System.Windows.Forms.Form
{
private ESRI.ArcGIS.ToolbarControl.AxToolbarControl axToolbarControl1;
private ESRI.ArcGIS.TOCControl.AxTOCControl axTOCControl1;
private ESRI.ArcGIS.MapControl.AxMapControl axMapControl1;
private ESRI.ArcGIS.PageLayoutControl.AxPageLayoutControl
axPageLayoutControl1;
The variable declared as visBoundsUpdatedE is
a delegate. A delegate is a class that can hold a
reference to a specific method and link this to a
specific event. The linking process between the
event and the method is sometimes known in
.NET as wiring.
private IToolbarMenu m_ToolbarMenu = new ToolbarMenuClass();
private IEnvelope m_Envelope; // The envelope drawn on the MapControl
private Object m_FillSymbol; // The symbol used to draw the envelope on
the MapControl
private ITransformEvents_VisibleBoundsUpdatedEventHandler
visBoundsUpdatedE; // The PageLayoutControl's focus map events
344 • ArcGIS Engine Developer Guide