SceneControl+AE+鼠标滚轮缩放

SceneControl+AE+鼠标滚轮缩放

要为SceneControl设置鼠标滚轮缩放必须定义委托，因为SceneControl没有Wheel事件，所以委托From的Wheel事件

public Form1()
{
InitializeComponent();
this.MouseWheel += new MouseEventHandler(this.SC1_Wheel); //在这个地方输入"this.MouseWheel+=”后连续按两次Tab键
}

private void SC1_Wheel(object sender, System.Windows.Forms.MouseEventArgs e)
{
try
{
pSC1.MousePointer = esriControlsMousePointer.esriPointerZoom;
System .Drawing .Point pSceneLocation = SC1.PointToScreen(SC1.Location);
System .Drawing .Point Pt = this.PointToScreen(e.Location);
if (Pt.X < pSceneLocation.X | Pt.X > pSceneLocation.X + SC1.Width | Pt.Y < pSceneLocation.Y | Pt.Y > pSceneLocation.Y + SC1.Height)

return;

double scale = 0.2;
if (e.Delta < 0) scale = -0.2;
ICamera pCamera = SC1.Camera;
IPoint pObserver = pCamera.Observer;
IPoint pTarget = pCamera.Target;
pObserver.X += (pObserver.X - pTarget.X) * scale;
pObserver.Y += (pObserver.Y - pTarget.Y) * scale;
pObserver.Z += (pObserver.Z - pTarget.Z) * scale;
pCamera.Observer = pObserver;
pSC1.SceneGraph.RefreshViewers();
this.Text = e.Delta.ToString();

}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}