AE创建气泡式的提示框（VB.Net和C#源码）

下面是用AE创建气泡式提示框的方法:

1、VB.Net源码
''' <summary>
''' 创建文本提示框
''' </summary>
''' <param name="x">提示框标识的位置X坐标</param>
''' <param name="y">提示框标识的位置Y坐标</param>
''' <param name="pTextString">提示框中显示的文本</param>
''' <param name="pPoint">提示框箭头指向的点</param>
''' <param name="pGraphicsContainer">包含提示框的graphicscontainer</param>
''' <returns></returns>
''' <remarks></remarks>
Public Function CreateTextElement(ByVal x As Double,ByVal y As Double,ByVal pTextString As String,Optional ByVal pPoint As IPoint = Nothing,Optional ByVal pGraphicsContainer As IGraphicsContainer = Nothing) As IElement
Dim pElement As IElement = New MarkerElementClass()
Dim pTElement As IElement = New TextElementClass()
Dim pTextSymbol As IFormattedTextSymbol = New TextSymbolClass()
Dim pBalloonCallout As IBalloonCallout = CreateBalloonCallout(x,y)
Dim pColor As IRgbColor = New RgbColorClass()
pColor.Red = 150
pColor.Green = 0
pColor.Blue = 0
pTextSymbol.Color = pColor
Dim pTextBackground As ITextBackground
pTextBackground = pBalloonCallout
pTextSymbol.Background = pTextBackground
pTextSymbol.Size = 8
CType(pTElement,ITextElement).Symbol = pTextSymbol
CType(pTElement,ITextElement).Text = pTextString
If pPoint Is Nothing Then pPoint = New Point : pPoint.PutCoords(x + Const_Dis,y + Const_Dis)
pTElement.Geometry = pPoint
pGraphicsContainer.AddElement(pTElement,1)
Return pTElement
End Function

''' <summary>
''' 创建balloon型提示框
''' </summary>
''' <param name="x">提示框所在位置X坐标</param>
''' <param name="y">提示框所在位置Y坐标</param>
''' <returns></returns>
''' <remarks></remarks>
Public Function CreateBalloonCallout(ByVal x As Double,ByVal y As Double) As IBalloonCallout
Dim pRgbClr As IRgbColor = New RgbColorClass()
pRgbClr.Red = 255
pRgbClr.Blue = 255
pRgbClr.Green = 255
Dim pSmplFill As ISimpleFillSymbol = New SimpleFillSymbolClass()
pSmplFill.Color = pRgbClr
pSmplFill.Style = esriSimpleFillStyle.esriSFSSolid
Dim pBllnCallout As IBalloonCallout = New BalloonCalloutClass()
pBllnCallout.Style = esriBalloonCalloutStyle.esriBCSRoundedRectangle
pBllnCallout.Symbol = pSmplFill
pBllnCallout.LeaderTolerance = 1
Dim pPoint As IPoint = New ESRI.ArcGIS.Geometry.PointClass()
pPoint.X = x
pPoint.Y = y
pBllnCallout.AnchorPoint = pPoint
Return pBllnCallout
End Function


2、C#源码

public void CreateTextElment(double x,double y)
{
IPoint pPoint = new PointClass();
IMap pMap = axMapControl1.Map;
IActiveView pActiveView = pMap as IActiveView;
IGraphicsContainer pGraphicsContainer;
IElement pElement = new MarkerElementClass();
IElement pTElement = new TextElementClass();
pGraphicsContainer = (IGraphicsContainer)pActiveView;
IFormattedTextSymbol pTextSymbol = new TextSymbolClass();
IBalloonCallout pBalloonCallout = CreateBalloonCallout(x,y);
IRgbColor pColor = new RgbColorClass();
pColor.Red = 150;
pColor.Green = 0;
pColor.Blue = 0;
pTextSymbol.Color = pColor;
ITextBackground pTextBackground;
pTextBackground = (ITextBackground)pBalloonCallout;
pTextSymbol.Background = pTextBackground;
((ITextElement)pTElement).Symbol = pTextSymbol;
((ITextElement)pTElement).Text = "测试";
pPoint.X = x + 42;
pPoint.Y = y + 42;
pTElement.Geometry = pPoint;
pGraphicsContainer.AddElement(pTElement,1);
pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics,null,null);
}

public IBalloonCallout CreateBalloonCallout(double x,double y)
{
IRgbColor pRgbClr = new RgbColorClass();
pRgbClr.Red = 255;
pRgbClr.Blue = 255;
pRgbClr.Green = 255;
ISimpleFillSymbol pSmplFill = new SimpleFillSymbolClass();
pSmplFill.Color = pRgbClr;
pSmplFill.Style = esriSimpleFillStyle.esriSFSSolid;
IBalloonCallout pBllnCallout = new BalloonCalloutClass();
pBllnCallout.Style = esriBalloonCalloutStyle.esriBCSRectangle;
pBllnCallout.Symbol = pSmplFill;
pBllnCallout.LeaderTolerance = 1;
IPoint pPoint = new ESRI.ArcGIS.Geometry.PointClass();
pPoint.X = x;
pPoint.Y = y;
pBllnCallout.AnchorPoint = pPoint;
return pBllnCallout;
}

（编辑：李大同）

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