PIE SDK矢量数据编辑事件的监听

 

1.功能简介

    通过IEditEvents接口，开发者可以监听到Editor对象的相关的事件，并且做出反应。包括Editor中开始编辑、结束编辑等操作，下面对矢量数据的编辑事件的监听功能进行介绍。

2.功能实现说明

2.1实现思路及原理说明

第一步	前提处于编辑状态，在编辑的开始和结束的时候进行触发的操作事件

2.2 核心接口与方法

接口/类	方法/属性	说明
IEditEvents	OnStartEditOperation；	开始编辑委托事件
	OnStopEditOperation	结束编辑委托事件
IEditor	GetEditState();	获取编辑状态
	StartEditOperation(string strDescription);	开始编辑操作
	StopEditOperation()	结束编辑操作

2.3示例代码

项目路径	百度云盘地址下/PIE示例程序/04数据操作/07矢量数据编辑事件的监听
数据路径	自定义即可
视频路径	百度云盘地址下/PIE视频教程/04数据操作/07矢量数据编辑事件的监听.avi
示例代码
//要素编辑器 private IEditor m_Editor = Editor.Instance; //鼠标按下起点 private IPoint m_StartPoint = null; //要素 private IFeature m_Feature = null; //标识符 private int m_Flag = 0; //地图初始化绑定编辑监听事件 private void FormMain_Load(object sender, EventArgs e) { //初始化绑定编辑监听事件 IEditEvents editEvents = Editor.Instance; editEvents.OnStartEditOperation += editEvents_OnStartEditOperation; editEvents.OnStopEditOperation += editEvents_OnStopEditOperation; } //委托事件 public void editEvents_OnStartEditOperation() { MessageBox.Show("开始绘制"); } public void editEvents_OnStopEditOperation() { MessageBox.Show("完成绘制"); } /// <summary> /// 开始编辑 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void ToolStripMenuItem_StartEdit_Click(object sender, EventArgs e) { if (m_Editor.GetEditState() == EditState.StateNotEditing) { MessageBox.Show("开始编辑"); m_Editor.StartEditing(); } } /// <summary> /// 结束编辑 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void ToolStripMenuItem_StopEdit_Click(object sender, EventArgs e) { if (m_Editor.GetEditState() == EditState.StateEditing) { if (MessageBox.Show("结束编辑前是否保存编辑数据", "确认", MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.OK) { m_Editor.SaveEditing();//保存编辑 } m_Editor.StopEditing(true);//停止编辑 } } /// <summary> /// 地图控件鼠标移动事件 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void mapControlMain_MouseDown(object sender, MouseEventArgs e) { if (e.Button != System.Windows.Forms.MouseButtons.Left) return; if (m_Editor.GetEditState() == EditState.StateEditing) { m_StartPoint = mapControlMain.FocusMap.ToMapPoint(e.Location); List<ILayer> layerList = new List<ILayer>(); int iLayerCount = mapControlMain.FocusMap.LayerCount; if (iLayerCount > 0) { ILayer layer = mapControlMain.GetLayer(iLayerCount - 1); layerList.Add(layer); if (layer.IsValid()) { if (layer.LayerType != LayerType.LayerTypeFeatureLayer) return; IGeometry geometry = null; switch (m_Flag) { case 2: mapControlMain.ActiveView.FocusMap.ClearSelectionFeatures(); m_Editor.StartEditOperation("开始编辑"); geometry = mapControlMain.TrackPolygon() as IGeometry; geometry.SpatialReference = mapControlMain.SpatialReference; IFeatureClass featureClass = (layer as IFeatureLayer).FeatureClass; m_Feature = featureClass.CreateNewFeature(); //创建Feature m_Feature.Geometry = geometry; featureClass.AddFeature(m_Feature); //添加Feature // featureClass.Save(); //保存 m_Editor.StopEditOperation(); mapControlMain.PartialRefresh(ViewDrawPhaseType.ViewAll);//不能少 m_Flag = 0; //一定要加 break; default: break; } } } } } /// <summary> /// 绘制面状要素 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void toolStripButton_DrawPolygon_Click(object sender, EventArgs e) { m_Flag = 2; }

2.4示例截图