小生 原文 ArcGIS engine中气泡标注的添加、修改！
你微微地笑着，不同我说什么话。而我觉得，为了这个，我已等待得久了。
——泰戈尔
喜欢看你微微的笑着，哪怕你一句话都不说，看见你笑，仿佛四季如春……笑，蕴含着着一种信任，一种安全，一种爱护，一种宽容，一种心灵的感应……宝贝，朝我笑笑，好么？
生活本已是一杯苦酒，我们何不笑着饮下？一颗感恩的心，一颗热爱生活的心，爱惜那些值得爱的人，一起欢乐，一起将各自生活的苦酒淡化，每天都让我们灿烂的笑……
不要认为后面还有更好的，因为现在拥有的就是最好的。不要因为距离太远而放弃，爱情可以和你一起坐火车的。不要因为对方不富裕而放弃，只要不是无能的人，勤劳可以让你们富裕的。不要因为父母反对而放弃，你会发现因为这个原因而反放弃的爱情，将是你一生的悔恨。其实对于爱情，越单纯越幸福。一生只谈一次恋爱是最好的，经历的太多了，会麻木；分离多了，会习惯；换恋人多了，会比较；到最后，你不会再相信爱情；你会自暴自弃；你会行尸走肉；你会与你不爱的人结婚，就这样过一辈子。
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.
private void axMapControl1_OnMouseDown(object sender, IMapControlEvents2_OnMouseDownEvent e)
{
axMapControl1.CurrentTool = null;
IPoint pPoint ;
pPoint = new PointClass();
pPoint.PutCoords(e.mapX, e.mapY);
IFormattedTextSymbol pTextSymbol = new TextSymbolClass();
pTextSymbol.Background = CreateBalloonCallout(e.mapX, e.mapY) as ITextBackground;
pTextSymbol.Direction = esriTextDirection.esriTDAngle;
pTextSymbol.Angle = 15;
ITextElement pTextElement = new TextElementClass();
pTextElement.Symbol = pTextSymbol as ITextSymbol;
pTextElement.Text = "MaDeSheng";
IElement ptexte = pTextElement as IElement;
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 as IGraphicsContainer;
pGraphicsContainer.AddElement(pTextElement as IElement, 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 IBalloonCallout CreateBalloonCallout(double x, double y)
{
IRgbColor pRgbClr = new RgbColorClass();
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 = new ESRI.ArcGIS.Geometry.PointClass();
pPoint.X = x;
pPoint.Y = y;
pBllnCallout.AnchorPoint = pPoint;
return pBllnCallout;
}
那么添加了之后如何修改呢?
双击事件！
private void axMapControl1_OnDoubleClick(object sender, 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 as IGraphicsContainer;
IEnumElement pEnumElement = pGraphicsContainer.LocateElements(pPoint, 10);
if (pEnumElement != null)
{
IElement pElement = pEnumElement.Next();
if (pElement is ITextElement)
{
ITextElement ptextElement = pElement as ITextElement;
labelEditCallout pLabelEditCallout = new labelEditCallout(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：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using ESRI.ArcGIS.Display;
using ESRI.ArcGIS.Geometry;
namespace Edit
{
public partial class labelEditCallout : Form
{
public string inputText = "";
public ITextSymbol textSymbol;
private bool ModifFillColor = false;
public labelEditCallout(string s,ITextSymbol texSy)
{
inputText = s;
textSymbol = texSy;
InitializeComponent();
}
private void labelEditCallout_Load(object sender, EventArgs e)
{
textBox1.Text = inputText;
comboBox1.Items.Add("矩形框");
comboBox1.Items.Add("圆角矩形");
//comboBox1.Items.Add("Oval");
comboBox1.SelectedIndex = 1;
}
public IColor ConvertColorToIColor(Color color)
{
IColor pColor = new RgbColorClass();
pColor.RGB = color.B * 65536 + color.G * 256 + color.R;
return pColor;
}
private void button2_Click(object sender, EventArgs e)
{
IBalloonCallout textBack = (((IFormattedTextSymbol)textSymbol).Background) as IBalloonCallout;
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;
IFormattedTextSymbol pTextSymbol = new TextSymbolClass();
pTextSymbol.Direction = esriTextDirection.esriTDAngle;
pTextSymbol.Angle = 15;
pTextSymbol.Background = pBllnCallout as ITextBackground;
textSymbol = pTextSymbol as ITextSymbol;
inputText = textBox1.Text;
this.Close();
}
//获取颜色
private void button1_Click(object sender, EventArgs e)
{
if (this.colorDialog.ShowDialog() == DialogResult.OK)
{
this.button1.BackColor = this.colorDialog.Color;
ModifFillColor = true;
}
}
private void button3_Click(object sender, EventArgs e)
{
this.Close();
}
}
}