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 = ;
//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 > )
{
ILayer layer = mapControlMain.GetLayer(iLayerCount - );
layerList.Add(layer);
if (layer.IsValid())
{
if (layer.LayerType != LayerType.LayerTypeFeatureLayer) return;
IGeometry geometry = null;
switch (m_Flag)
{
case :
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 = ; //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 = ;
}
|
2.4示例截图
