ArcGIS Engine Developer Guide

BUILDING APPLICATIONS WITH WINDOWS CONTROLS
3. Add the following code to the beginning of the Form_Load event:
private void Form1_Load(object sender, System.EventArgs e)
{
// Suppress drawing while resizing.
this.SetStyle(ControlStyles.EnableNotifyMessage,true);
This method of suppressing resize drawing
works by examining the windows messages sent
to the form. When a form starts resizing,
windows sends the WM_ENTERSIZEMOVE
Windows(messge). At this point you suppress
drawing to the MapControl and
PageLayoutControl and draw using a “stretchy
bitmap”. When Windows sends the
WM_EXITSIZEMOVE the form is released from
resizing and you resume with a full redraw at
the new extent.
}
4. Add the following constants to the class:
public class Form1 : System.Windows.Forms.Form
{
…
private const int WM_ENTERSIZEMOVE = 0x231;
private const int WM_EXITSIZEMOVE = 0x232;
…
5. Add the following code to override the OnNotifyMessage method.
protected override void OnNotifyMessage(System.Windows.Forms.Message m)
{
base.OnNotifyMessage (m);
if (m.Msg == WM_ENTERSIZEMOVE)
{
axMapControl1.SuppressResizeDrawing(true, 0);
axPageLayoutControl1.SuppressResizeDrawing(true, 0);
}
else if (m.Msg == WM_EXITSIZEMOVE)
{
axMapControl1.SuppressResizeDrawing(false, 0);
axPageLayoutControl1.SuppressResizeDrawing(false, 0);
}
}
6. Build and run the application. Try resizing the form.
Adding commands to the ToolbarControl
ArcGIS Engine comes with more than 120 commands and tools that work with
the MapControl, the PageLayoutControl, and the ToolbarControl directly. These
commands and tools provide you with a lot of frequently used GIS functionality
for map navigation, graphics management, and feature selection. You will now
add some of these commands and tools to your application.
1. In the Form_Load event add the following code before the load document
code.
private void Form1_Load(object sender, System.EventArgs e)
{
string progID;
// Add generic commands.
progID = "esriControlToolsGeneric.ControlsOpenDocCommand";
axToolbarControl1.AddItem(progID, -1 , -1, false, 0,
esriCommandStyles.esriCommandStyleIconOnly);
Chapter 6 • Developer scenarios • 339