图像编辑功能
//操作类型
string strOperator = "";
//当前地图视图
IActiveView m_activeView = null;
//当前操作图层
IFeatureLayer m_featureLayer = null;
//当前操作实体
IFeature m_feature = null;
//当前线移动反馈对象
IMoveLineFeedback m_MoveLineFeedback = new MoveLineFeedbackClass();
//当前点移动反馈对象
IMovePointFeedback m_MovePointFeedback = new MovePointFeedbackClass();
//当前面移动反馈对象
IMovePolygonFeedback m_MovePolygonFeedback = new MovePolygonFeedbackClass();
public Form1()
{
InitializeComponent();
}
//更新图层
private void button1_Click(object sender, EventArgs e)
{
comboBox1.Items.Clear();
for (int i = 0; i < axMapControl1.LayerCount;i++ )
{
ILayer layer = axMapControl1.get_Layer(i);
comboBox1.Items.Add(layer.Name);
}
}
//选择操作图层,并让map选中图层的第一个实体
private void comboBox1_TextChanged(object sender, EventArgs e)
{
if (comboBox1.Text !="")
{
for (int i = 0; i < axMapControl1.LayerCount;i++ )
{
ILayer layer = axMapControl1.get_Layer(i);
if (layer.Name == comboBox1.Text.ToString())
{
m_featureLayer=layer as IFeatureLayer;
m_feature=m_featureLayer.FeatureClass.GetFeature(1);
if (m_feature!=null)
{
axMapControl1.Map.SelectFeature(m_featureLayer,m_feature);
}
m_activeView=axMapControl1.ActiveView;
return;
}
}
}
}
//初始化反馈对象参数
private void button2_Click(object sender, EventArgs e)
{
strOperator = "move";
m_MovePointFeedback = new MovePointFeedbackClass();
m_MoveLineFeedback = new MoveLineFeedbackClass();
m_MovePolygonFeedback = new MovePolygonFeedbackClass();
}
//删除节点
private void button3_Click(object sender, EventArgs e)
{
IPointCollection pointCollection;
if (m_feature.Shape.GeometryType==esriGeometryType.esriGeometryPolyline)
{
pointCollection=new PolylineClass();
IPolyline polyline=m_feature.Shape as IPolyline;
pointCollection=polyline as IPointCollection;
//若点数少于两个就无法成直线了
if (pointCollection.PointCount>2)
{
//移除制定节点
pointCollection.RemovePoints(pointCollection.PointCount-1,1);
}
}
else if(m_feature.Shape.GeometryType == esriGeometryType.esriGeometryPolygon)
{
pointCollection=new PolygonClass();
IPolygon polygon=m_feature.Shape as IPolygon;
pointCollection=polygon as IPointCollection;
//如果点个数少于3个就无法构成面了
if (pointCollection.PointCount>3)
{
//移除指定节点
pointCollection.RemovePoints(pointCollection.PointCount-1,1);
}
}
IWorkspaceEdit workspaceEdit;
IWorkspace workspace;
IDataset dataset=m_featureLayer.FeatureClass as IDataset;
workspace=dataset.Workspace;
workspaceEdit=workspace as IWorkspaceEdit;
//开始编辑
workspaceEdit.StartEditing(true);
workspaceEdit.StartEditOperation();
//保存数据
m_feature.Store();
//结束编辑
workspaceEdit.StopEditOperation();
workspaceEdit.StopEditing(true);
m_activeView.Refresh();
}
//增加节点
private void button4_Click(object sender, EventArgs e)
{
IPointCollection pointCollection;
IPoint point = new PointClass();
IPoint fromPoint = new PointClass();
IPoint toPoint = new PointClass();
if (m_feature.Shape.GeometryType ==esriGeometryType.esriGeometryPolyline )
{
pointCollection = new PolylineClass();
IPolyline polyline = m_feature.Shape as IPolyline;
object missing1 = Type.Missing;
object missing2 = Type.Missing;
pointCollection = polyline as IPointCollection;
//获取线对象的最后两个点
fromPoint = pointCollection.get_Point(pointCollection.PointCount - 2);
toPoint = pointCollection.get_Point(pointCollection.PointCount - 1);
//根据线最后两个点创建一个新点
point.PutCoords((fromPoint.X + toPoint.X) / 2, (fromPoint.Y + toPoint.Y) / 2 + 50);
//将新点添加到线对象的点集合中
pointCollection.AddPoint(point, ref missing1, ref missing2);
}
else if (m_feature.Shape.GeometryType==esriGeometryType.esriGeometryPolygon)
{
pointCollection = new PolygonClass();
IPolygon polygon = m_feature.Shape as IPolygon;
object missing1 = Type.Missing;
object missing2 = Type.Missing;
pointCollection = polygon as IPointCollection;
//获取对象最后两个点
fromPoint = pointCollection.get_Point(pointCollection.PointCount-2);
toPoint = pointCollection.get_Point(pointCollection.PointCount - 1);
//根据最后两点创建一个新点
point.PutCoords((fromPoint.X + toPoint.X) / 2, (fromPoint.Y + toPoint.Y) / 2 + 50);
//将新点添加进点集
pointCollection.AddPoint(point, ref missing1, ref missing2);
}
IWorkspaceEdit workspaceEdit;
IWorkspace workspace;
IDataset dataset = m_featureLayer.FeatureClass as IDataset;
workspace = dataset.Workspace;
workspaceEdit = workspace as IWorkspaceEdit;
//开始编辑
workspaceEdit.StartEditing(true);
workspaceEdit.StartEditOperation();
//保存数据
m_feature.Store();
//结束编辑
workspaceEdit.StopEditOperation();
workspaceEdit.StopEditing(true);
m_activeView.Refresh();
}
private void axMapControl1_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)
{
IPoint point = new PointClass();
//IFeatureClass featureClass = null;
if (m_feature == null) return;
switch (strOperator)
{
case "move":
//将当前鼠标光标位置的点转换为地图上的坐标
point = m_activeView.ScreenDisplay.DisplayTransformation.ToMapPoint(e.x, e.y);
if (m_feature.Shape.GeometryType==esriGeometryType.esriGeometryPoint)
{
//设置显示对象，并启动移动
m_MovePointFeedback.Display = m_activeView.ScreenDisplay;
m_MovePointFeedback.Start(m_feature.Shape as IPoint, point);
}
else if (m_feature.Shape.GeometryType == esriGeometryType.esriGeometryPolyline)
{
//设置显示对象，并启动移动
m_MoveLineFeedback.Display = m_activeView.ScreenDisplay;
m_MoveLineFeedback.Start(m_feature.Shape as IPolyline, point);
}
else if (m_feature.Shape.GeometryType == esriGeometryType.esriGeometryPolygon)
{
//设置显示对象，并启动移动
m_MovePolygonFeedback.Display = m_activeView.ScreenDisplay;
m_MovePolygonFeedback.Start(m_feature.Shape as IPolygon, point);
}
break;
}
}
private void axMapControl1_OnMouseMove(object sender, IMapControlEvents2_OnMouseMoveEvent e)
{
IPoint point = new PointClass();
switch (strOperator)
{
case "move":
if (m_feature.Shape.GeometryType==esriGeometryType.esriGeometryPoint)
{
if (m_MovePointFeedback!=null)
{
//将当前鼠标光标位置的点转换为地图上的左边
point = m_activeView.ScreenDisplay.DisplayTransformation.ToMapPoint(e.x,e.y);
//移动对象到当前鼠标位置
m_MovePointFeedback.MoveTo(point);
}
}
else if (m_feature.Shape.GeometryType==esriGeometryType.esriGeometryPolyline)
{
if (m_MoveLineFeedback!=null)
{
//将当前鼠标光标位置的点转换为地图上的左边
point = m_activeView.ScreenDisplay.DisplayTransformation.ToMapPoint(e.x,e.y);
//移动对象到当前鼠标位置
m_MoveLineFeedback.MoveTo(point);
}
}
else if (m_feature.Shape.GeometryType == esriGeometryType.esriGeometryPolygon)
{
if (m_MovePolygonFeedback != null)
{
//将当前鼠标光标位置的点转换为地图上的左边
point = m_activeView.ScreenDisplay.DisplayTransformation.ToMapPoint(e.x, e.y);
//移动对象到当前鼠标位置
m_MovePolygonFeedback.MoveTo(point);
}
}
break;
}
}
private void axMapControl1_OnMouseUp(object sender, IMapControlEvents2_OnMouseUpEvent e)
{
if (m_feature == null) return;
IGeometry resultGeometry = null;
switch (strOperator)
{
case "move":
if (m_feature.Shape.GeometryType==esriGeometryType.esriGeometryPoint)
{
//停止移动
resultGeometry = m_MovePointFeedback.Stop() as IGeometry;
m_feature.Shape = resultGeometry;
}
else if (m_feature.Shape.GeometryType == esriGeometryType.esriGeometryPolyline)
{
//停止移动
resultGeometry = m_MoveLineFeedback.Stop() as IGeometry;
m_feature.Shape = resultGeometry;
}
else if (m_feature.Shape.GeometryType == esriGeometryType.esriGeometryPolygon)
{
//停止移动
resultGeometry = m_MovePolygonFeedback.Stop() as IGeometry;
m_feature.Shape = resultGeometry;
}
IWorkspaceEdit workspaceEdit;
IWorkspace workspace;
IDataset dataset = m_featureLayer.FeatureClass as IDataset;
workspace = dataset.Workspace;
workspaceEdit = workspace as IWorkspaceEdit;
//开始编辑
workspaceEdit.StartEditing(true);
workspaceEdit.StartEditOperation();
//保存数据
m_feature.Store();
//结束编辑
workspaceEdit.StopEditOperation();
workspaceEdit.StopEditing(true);
m_MovePointFeedback = null;
m_MovePolygonFeedback = null;
m_MoveLineFeedback = null;
break;
}
m_activeView.Refresh();
axMapControl1.Map.ClearSelection();
}
