public override void OnClick()
{
if (_hookHelper != null)
{
if (_hookHelper.FocusMap.LayerCount == 0)
{
MessageBoxEx.Show("没有加载图层或图层没有选中状态，请选中需要提取的图层！", "提示");
IMapControl4 mapControl = _hookHelper.Hook as IMapControl4;
mapControl.CurrentTool = null;
return;
}
if (_frmPolygonExtract == null)
{
_frmPolygonExtract = new FrmPolygonExtract();
}
else
{
return;
}
}
}
/// <summary>
/// 获得自定义多边形
/// </summary>
/// <param name="Button"></param>
/// <param name="Shift"></param>
/// <param name="X"></param>
/// <param name="Y"></param>
public override void OnMouseDown(int Button, int Shift, int X, int Y)
{
IMapControl4 mapControl = null;
if (_hookHelper != null)
{
mapControl = (IMapControl4)_hookHelper.Hook;
_polygon = (IPolygon)mapControl.TrackPolygon();
}
if (_polygon != null)
{
if (_polygon.IsEmpty == false)
{
IMap map = _hookHelper.FocusMap;
IGraphicsContainer graphicsContainer = (IGraphicsContainer)map;
IActiveView activeView = (IActiveView)map;
if (_element != null)
{
graphicsContainer.DeleteElement(_element);
activeView.Refresh();
}
IRgbColor color = new RgbColor();
color.Red = 255;
color.Green = 255;
color.Blue = 0;
IMarkerLineSymbol markerLineSymbol = new MarkerLineSymbol();
markerLineSymbol.Color = color;
markerLineSymbol.Width = 2;
ISimpleFillSymbol simpleFillSym = new SimpleFillSymbol();
simpleFillSym.Style = esriSimpleFillStyle.esriSFSHollow;
simpleFillSym.Outline = markerLineSymbol;
IFillShapeElement polygonElement = new PolygonElementClass();
polygonElement.Symbol = simpleFillSym;
_element = (IElement)polygonElement;
_element.Geometry = _polygon;
graphicsContainer.AddElement(_element, 0);
activeView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
//传值
if (_frmPolygonExtract.IsDisposed)
{
_frmPolygonExtract = new FrmPolygonExtract();
}
_frmPolygonExtract.Map = _hookHelper.FocusMap;
_frmPolygonExtract.MapControl = (IMapControl4)_hookHelper.Hook;
_frmPolygonExtract.Geometry = _polygon;
_frmPolygonExtract.Element = _element;
_frmPolygonExtract.ShowDialog();
}
else
{
MessageBoxEx.Show("画出的几何图象是空的！", "提示");
}
}
else
{
return;
}
mapControl.CurrentTool = null;
_element = null;
}