DrawShape draws the supplied geometry onto the display. Use the DrawShape method within the esriViewForeground phase of the IMapControlEvents2::OnAfterDraw event.
FlashShape flashes the supplied geometry onto the display.
DrawShape 方法只支持以下对象,而Line等对象不被支持
Geometry objects implementing IEnvelope, IMultiPatch, IMultiPoint, IPoint, IPolygon and IPolyline are supported
public partial class Form1 : Form
{
ILine m_line;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void axMapControl1_OnMouseDown(object sender, ESRI.ArcGIS.Controls.IMapControlEvents2_OnMouseDownEvent e)
{
if (e.button == 1)
{
IPoint fromPoint = new PointClass();
fromPoint.PutCoords(100, 100);
IPoint toPoint = new PointClass();
toPoint.PutCoords(150, 150);
ILine line = new LineClass();
line.PutCoords(fromPoint, toPoint);
Console.WriteLine(line.Length.ToString());
m_line = line;
axMapControl1.FullExtent = line.Envelope;
IEnvelope pRect = new EnvelopeClass();
pRect = axMapControl1.Extent;
pRect.Expand(2, 2, true);
axMapControl1.Extent = pRect;
axMapControl1.Refresh(esriViewDrawPhase.esriViewForeground, Type.Missing, Type.Missing);
}
if (e.button == 2)
{
axMapControl1.Extent = axMapControl1.TrackRectangle();
}
}
private IRgbColor GetRGBColor(int red, int green, int blue)
{
//Create rgb color and grab hold of the IRGBColor interface
IRgbColor rGB = new RgbColorClass();
//Set rgb color properties
rGB.Red = red;
rGB.Green = green;
rGB.Blue = blue;
rGB.UseWindowsDithering = true;
return rGB;
}
private void axMapControl1_OnAfterDraw(object sender, IMapControlEvents2_OnAfterDrawEvent e)
{
if (e.viewDrawPhase == (int)esriViewDrawPhase.esriViewForeground & m_line != null)
{
ILineSymbol lineSymbol = new SimpleLineSymbolClass();
//Set line symbol properties
lineSymbol.Color = GetRGBColor(0, 0, 0);
lineSymbol.Width = 2;
object oLineSymbol = lineSymbol;
IPolyline m_Polyline = new PolylineClass();
ISegmentCollection pSeg = m_Polyline as ISegmentCollection;
object Missing = Type.Missing;
pSeg.AddSegment((ISegment)m_line, ref Missing, ref Missing);
axMapControl1.DrawShape(m_Polyline, ref oLineSymbol);
}
}
}
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