实现图像添加label

void CmapwingisTest2View::OnToolsAddTiffLayer()

{

TCHAR szFilters[]= _T("TIFF Files (*.tif)|*.tif||");

CFileDialog fileDlg (TRUE,_T("tif"),_T("*.tif"),

OFN_FILEMUSTEXIST| OFN_HIDEREADONLY, szFilters, this);

if( fileDlg.DoModal ()!=IDOK )   return;

CString m_strFilePath = fileDlg.GetPathName();

if (_T("")!=m_strFilePath)

{

// 先删除所有图层

//m_map.RemoveAllLayers();

// 获取后缀名判断文件是tif图像还是shp文件

CString strExt = m_strFilePath.Right(3);

if (_T("tif")==strExt)

{

// 创建图像接口打开图像加入地图

mapWindow::IImagePtr pImage;

pImage.CreateInstance(__uuidof(mapWindow::Image));

pImage->Open(_bstr_t(m_strFilePath),mapWindow::USE_FILE_EXTENSION,TRUE,NULL);

m_map.AddLayer(pImage,true);

mapWindow::ILabelsPtr labels;

pImage->get_Labels( &labels );

labels->PutFontSize(12);

labels->PutFontBold(true);

labels->PutFontOutlineVisible(true);

labels->PutFontOutlineWidth(4);

mapWindow::ILabelCategoryPtr cat;

labels->AddCategory("Red");

//cat->PutFontColor(RGB(255,0,0));

mapWindow::IExtentsPtr ext = pImage->GetExtents();

double xmin,xmax,ymin,ymax;

ext->get_xMax(&xmax);

ext->get_xMin(&xmin);

ext->get_yMax(&ymax);

ext->get_yMin(&ymin);

double  xRange = xmax-xmin;

double  yRange = ymax-ymin;

CString str;

for (int i = 0; i < 100; i++)

{

double x=xRange*(rand()%9)*0.1;

double y=yRange* ( rand()%9 )/10.0;

int categoryIndex = i % 3;

str.Format("%d",i);（http://www.amjmh.com/v/BIBRGZ_558768/）

labels->AddLabel( _bstr_t(str ),xmin+x,ymin+y,i*3.6,categoryIndex);

}

}

}

return;

}