ArcGIS engine中气泡标注，是我们在编辑图形中一个重要的工具，能提供注释功能，下面的介绍怎么来编程实现callout的添加，以及怎么去修改它们！
// 在Mapcontrol的mouseDown中添加下列内容，来添加气泡注释功能：callout.
privatevoid axMapControl1_OnMouseDown(object sender,IMapControlEvents2_OnMouseDownEvent e) {
axMapControl1.CurrentTool = null;
IPoint pPoint ;
pPoint = new PointClass();
pPoint.PutCoords(e.mapX, e.mapY);
IFormattedTextSymbol pTextSymbol = newTextSymbolClass();
pTextSymbol.Background = CreateBalloonCallout(e.mapX, e.mapY) asITextBackground;
pTextSymbol.Direction =esriTextDirection.esriTDAngle;
pTextSymbol.Angle = 15;
ITextElement pTextElement = newTextElementClass();
pTextElement.Symbol = pTextSymbol asITextSymbol;
pTextElement.Text = "MaDeSheng";
IElement ptexte = pTextElement asIElement;
pPoint = new PointClass();
pPoint.PutCoords(e.mapX * 0.90, e.mapY*1.1);
ptexte.Geometry = pPoint as IGeometry;
IMap pMap = axMapControl1.Map;
IGraphicsContainer pGraphicsContainer = pMap asIGraphicsContainer;
pGraphicsContainer.AddElement(pTextElement asIElement, 0);
this.axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics,null, null);
}
红颜色的部分是产生气泡背景，具体程序如下：
public IBalloonCalloutCreateBalloonCallout(double x, double y) {
IRgbColor pRgbClr = newRgbColorClass(); pRgbClr.Red =225; pRgbClr.Blue =225; pRgbClr.Green =225; ISimpleFillSymbol pSmplFill =new SimpleFillSymbolClass(); pSmplFill.Color =pRgbClr; pSmplFill.Style =esriSimpleFillStyle.esriSFSSolid; IBalloonCallout pBllnCallout= new BalloonCalloutClass(); //pBllnCallout.Style =esriBalloonCalloutStyle.esriBCSRectangle; pBllnCallout.Style =esriBalloonCalloutStyle.esriBCSRoundedRectangle; pBllnCallout.Symbol =pSmplFill; pBllnCallout.LeaderTolerance= 5; IPoint pPoint = newESRI.ArcGIS.Geometry.PointClass(); pPoint.X =x; pPoint.Y =y; pBllnCallout.AnchorPoint =pPoint; returnpBllnCallout; }
那么添加了之后如何修改呢?
双击事件！
private void axMapControl1_OnDoubleClick(objectsender, IMapControlEvents2_OnDoubleClickEvent e)
{
if(e.button ==1)
{
//标注的修改
if(((axMapControl1.CurrentTool) as ICommand).Name =="ControlToolsGraphicElement_SelectTool")//这一句的判断很牛B，我当时考虑了半天才搞出来。难点呀！toolbarControl中要加载esriControls.ControlsSelectTool工具
{
IPoint pPoint = new PointClass();
pPoint.PutCoords(e.mapX, e.mapY);
IMap pMap = axMapControl1.Map;
IGraphicsContainer pGraphicsContainer = pMap asIGraphicsContainer;
IEnumElement pEnumElement =pGraphicsContainer.LocateElements(pPoint, 10);
if (pEnumElement != null)
{
IElementpElement = pEnumElement.Next();
if(pElement is ITextElement)
{
ITextElement ptextElement =pElement as ITextElement;
labelEditCallout pLabelEditCallout = newlabelEditCallout(ptextElement.Text,ptextElement.Symbol);
pLabelEditCallout.ShowDialog();
ptextElement.Text =pLabelEditCallout.inputText;
ptextElement.Symbol =pLabelEditCallout.textSymbol;
pGraphicsContainer.DeleteElement(pElement);
pGraphicsContainer.AddElement(pElement,0);
//这两句可以用pGraphicsContainer.UpdataElement(pElement);来代替
this.axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics,null, null);
}
}
}
}
}
labelEditCallout是我自己弄的一个修改样式，其实很简单的一个页面，截图如下：
具体，代码如下：
usingSystem;
usingSystem.Collections.Generic;
usingSystem.ComponentModel;
usingSystem.Data;
usingSystem.Drawing;
usingSystem.Linq;
usingSystem.Text;
usingSystem.Windows.Forms;
usingESRI.ArcGIS.Display;
usingESRI.ArcGIS.Geometry;
namespaceEdit
{
public partial class labelEditCallout :Form
{
publicstring inputText = "";
publicITextSymbol textSymbol;
privatebool ModifFillColor = false;
publiclabelEditCallout(string s,ITextSymbol texSy)
{
inputText =s;
textSymbol =texSy;
InitializeComponent();
}
privatevoid labelEditCallout_Load(object sender, EventArgse)
{
textBox1.Text =inputText;
comboBox1.Items.Add("矩形框");
comboBox1.Items.Add("圆角矩形");
//comboBox1.Items.Add("Oval");
comboBox1.SelectedIndex = 1;
}
publicIColor ConvertColorToIColor(Color color)
{
IColor pColor = newRgbColorClass();
pColor.RGB = color.B * 65536+ color.G * 256 + color.R;
returnpColor;
}
privatevoid button2_Click(object sender, EventArgs e)
{
IBalloonCallout textBack =(((IFormattedTextSymbol)textSymbol).Background) asIBalloonCallout;
IFillSymbol pOldFill =textBack.Symbol;
IPoint pPoint =textBack.AnchorPoint;
ISimpleFillSymbol pSmplFill =new SimpleFillSymbolClass();
pSmplFill.Style =esriSimpleFillStyle.esriSFSSolid;
if(ModifFillColor)
{
pSmplFill.Color =ConvertColorToIColor(this.button1.BackColor);
}
else
pSmplFill.Color =pOldFill.Color;
IBalloonCallout pBllnCallout= new BalloonCalloutClass();
switch(comboBox1.Text)
{
case"矩形框":
pBllnCallout.Style =esriBalloonCalloutStyle.esriBCSRectangle;
break;
case"圆角矩形":
pBllnCallout.Style =esriBalloonCalloutStyle.esriBCSRoundedRectangle;
break;
//case"Oval":
// pBllnCallout.Style =esriBalloonCalloutStyle.esriBCSOval;
// break;
}
pBllnCallout.Symbol =pSmplFill;
pBllnCallout.LeaderTolerance= 5;
pBllnCallout.AnchorPoint =pPoint;
IFormattedTextSymbolpTextSymbol = new TextSymbolClass();
pTextSymbol.Direction =esriTextDirection.esriTDAngle;
pTextSymbol.Angle =15;
pTextSymbol.Background =pBllnCallout as ITextBackground;
textSymbol = pTextSymbol asITextSymbol;
inputText =textBox1.Text;
this.Close();
}
//获取颜色
privatevoid button1_Click(object sender, EventArgs e)
{
if(this.colorDialog.ShowDialog() ==DialogResult.OK)
{
this.button1.BackColor =this.colorDialog.Color;
ModifFillColor = true;
}
}
privatevoid button3_Click(object sender, EventArgs e)
{
this.Close();
}
}
}
