/// <summary>
/// 几何闪烁，实现ArcMap的闪烁效果
/// </summary>
/// <param name="mapControl"></param>
/// <param name="geometry"></param>
/// <param name="bZoom">是否缩放到指定几何，默认不缩放</param>
public void Flash(IMapControl4 mapControl, IGeometry geometry, bool bZoom = false)
{
if (geometry == null || geometry.IsEmpty)
{
return;
}
IHookHelper hookHelper = new HookHelperClass();
hookHelper.Hook = mapControl;
IHookActions hookActions = hookHelper as IHookActions;
if (bZoom) //先缩放
{
hookActions.DoAction(geometry, esriHookActions.esriHookActionsZoom);
hookHelper.ActiveView.ScreenDisplay.UpdateWindow();
}
//再闪烁
if (hookActions.get_ActionSupported(geometry, esriHookActions.esriHookActionsFlash))
{
hookActions.DoAction(geometry, esriHookActions.esriHookActionsFlash);
}
}
/// <summary>
/// 显示节点的信息
/// </summary>
/// <param name="node"></param>
private void ShowClickedNodeInfo(TreeNode nodeClicked, bool doFlash)
{
if (nodeClicked == null)
{
//初始化树型显示窗口
InitializeAttributesList();
return;
}
//获取点击点对应的要素
int nodeLevel = nodeClicked.Level;
//获取点击的是图层还是图层下的要素
//若featureIndex < 0则表示点击的是图层,闪烁图层下选中的所有要素
//反之，则表示点击的是图层下的要素，获取图层索引和要素索引，
//用于在结果列表中安索引获取要素或要素集属性
int layerIndex = -1; int featureIndex = -1;
if (nodeLevel > 0)
{
TreeNode parentNode = nodeClicked.Parent;
layerIndex = parentNode.Index;
featureIndex = nodeClicked.Index;
}
else
{
layerIndex = nodeClicked.Index;
}
//获取对应要素
LayerIdentifiedResult layerResult = identifiedResultsList[layerIndex];
//点击了图层下的要素
if (featureIndex > -1)
{
IFeatureIdentifyObj identifyObjDefault = layerResult.IdentifiedFeatureObjList[featureIndex];
IFeature featureDefault = (identifyObjDefault as IRowIdentifyObject).Row as IFeature;
//显示属性
ShowFeatureAttributes(featureDefault);
//判断是否闪烁要素
if (doFlash)
{
HookHelperClass hookHelper = new HookHelperClass();
hookHelper.Hook = MainForm.Instance.AxMapCtrl.Object;
IHookActions hookAction = (IHookActions)hookHelper;
hookAction.DoAction(featureDefault.Shape, esriHookActions.esriHookActionsPan);
Application.DoEvents();
hookAction.DoAction(featureDefault.Shape, esriHookActions.esriHookActionsFlash);
//IIdentifyObj identifyObj = identifyObjDefault as IIdentifyObj;
//if (identifyObj != null)
//{
// // identifyObj.Flash(associateMapControl.ActiveView.ScreenDisplay);
// // identifyObj.Flash(MapUtils.GetActiveView().ScreenDisplay);
//}
}
}
//点击了图层，同时闪烁图层下的所有要素图形
else
{
flashObjects.FlashObjects(layerResult);
}
}