infodlg.cpp

程序编写环境为Visual Studio.NET 2002

// InfoDlg.cpp : implementation file
//

#include "stdafx.h"
#include "NameGis.h"
#include "MainFrm.h"
#include "NameGisView.h"
#include "MapObjects2.h"
#include "Crack.h"
#include "AppApi.h"

#include "InfoDlg.h"


// CInfoDlg dialog
//----------------------------------------------------------------------------------------------
IMPLEMENT_DYNAMIC(CInfoDlg, CDialog)
CInfoDlg::CInfoDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CInfoDlg::IDD, pParent)
	, m_FeatureNum(_T(""))
	, m_FeatureType(_T(""))
{
	m_pItmInfos = NULL;
}
//----------------------------------------------------------------------------------------------
CInfoDlg::~CInfoDlg()
{
	if(m_pItmInfos)
	{
		delete []m_pItmInfos;
		m_pItmInfos = NULL;
	}
}
//----------------------------------------------------------------------------------------------
void CInfoDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	DDX_Control(pDX, IDC_INFO_COMBO, m_FeatureBox);
	DDX_Control(pDX, IDC_INFO_INFORESULT, m_FeatureInfoList);
	DDX_Text(pDX, IDC_INFO_NUM, m_FeatureNum);
	DDX_Text(pDX, IDC_INFO_TYPE, m_FeatureType);
}


BEGIN_MESSAGE_MAP(CInfoDlg, CDialog)
	ON_CBN_SELCHANGE(IDC_INFO_COMBO, OnCbnSelchangeInfoCombo)
END_MESSAGE_MAP()


// CInfoDlg message handlers

//----------------------------------------------------------------------------------------------
// 功能：确定指定位置的地物
// 参数：[in]long x	鼠标位置的X值(像素坐标)
//       [in]long y	鼠标位置的Y值(像素坐标)
// 返回值：void
void CInfoDlg::Identify(int x, int y)
{
	CMainFrame* pMainWnd = (CMainFrame*)AfxGetMainWnd();
	CNameGisView* pMapView = (CNameGisView*)(pMainWnd->m_wndSplitter.GetPane(0,0));
	CEnvironment* env = &(pMainWnd->m_environment);
	env->ClearSelRsts();
    
	int  nFeatCount = 0; //选中地物的数目
	CMoPoint  pt;  //鼠标的位置(地图坐标)
	pt = pMapView->m_Map.ToMapPoint(x, y);
	m_nIdx = -1;
    
	//初始化控件	
	m_FeatureBox.ResetContent();
	m_FeatureInfoList.ResetContent();
	
	if(!m_pItmInfos)
		m_pItmInfos = new ItemInfo[env->m_nLayerNum]; 
	
	//动态计算查询距离
	double dScale = env->CalcScale(&(pMapView->m_Map));			//地图比例尺
    
	if (dScale > 8000)
	{
		dScale = dScale/10000;
		dScale = dScale / 5000;
	}
	else
	{
		dScale = dScale/10000;
		dScale = dScale / 2500;
	}
    
	//首先，查询点地物，其次，查询线地物，最后查询面状地物
	//查询的图层只要是可见的
	int aShapeType[3];
	aShapeType[0] = moShapeTypePoint;
	aShapeType[1] = moShapeTypeLine;
	aShapeType[2] = moShapeTypePolygon;
	
	for (int j = 0; j < 3; j ++)
	{
		for (int i = 0; i < env->m_nLayerNum; i ++)
		{		
			if (env->m_layerInfos[i].layer.GetShapeType() != aShapeType[j])
				continue;
            
			m_pItmInfos[i].szName = "";

			//图层可见并且可选择，才能够identify
			if (env->m_layerInfos[i].layer.GetVisible() 
				&& env->m_layerInfos[i].bCanSelected)
			{
				m_pItmInfos[i].rst = 
					env->m_layerInfos[i].layer.SearchByDistance(pt,dScale,"");
			}
			else
			{
				//图层不可显示，则跳到下一个
				m_pItmInfos[i].rst = NULL;
				continue;
			}
            
			m_pItmInfos[i].szTable = env->m_layerInfos[i].szTableName;
			m_pItmInfos[i].layer  = env->m_layerInfos[i].layer ;	
			m_pItmInfos[i].szType = env->m_layerInfos[i].szType; 
			m_pItmInfos[i].szSubType = env->m_layerInfos[i].szSubType; 
			m_pItmInfos[i].szFieldName = env->m_layerInfos[i].szFieldName;  

			if (m_pItmInfos[i].rst)
			{
				if (!m_pItmInfos[i].rst.GetEof())
				{
					CString szTemp = m_pItmInfos[i].rst.GetFields().Item(
						COleVariant("名称")).GetValueAsString();
					if (szTemp != "")
					{
						m_pItmInfos[i].szName = szTemp;
					}
					else
					{
						m_pItmInfos[i].rst = NULL;
						continue;
					}
                    
					if (m_pItmInfos[i].szName != "")
					{
						m_FeatureBox.AddString(m_pItmInfos[i].szName); 
						nFeatCount ++;
					}
				}
			}
		}
	}

	if (nFeatCount > 0)
	{
		char buffer[20];
		_itoa(nFeatCount, buffer, 10 );
		m_FeatureNum = "总共找到" + CString(buffer) + "个地名";
		m_FeatureBox.SetCurSel(0);

		m_nIdx = 0;
		CString str;		
		m_FeatureBox.GetLBText(0, str);
		LoadListBox(GetIndex(str));
		UpdateData(FALSE);
	}
	else
	{
		m_FeatureNum = "没有找到任何地名";
		m_FeatureType = "类型：没有"; 
		env->m_selectedSymbol = NULL;
		env->m_selectedFeature = NULL;
		UpdateData(FALSE);
	}
}
//----------------------------------------------------------------------------------------------
// 功能：显示地名的详细信息
BOOL CInfoDlg::LoadListBox(int nIndex)
{
	if ("" == m_pItmInfos[nIndex].szName)
		return FALSE;

	m_FeatureInfoList.ResetContent();	
	m_FeatureType = "类型："+m_pItmInfos[nIndex].szSubType; 
	CMainFrame* pMainWnd = (CMainFrame*)AfxGetMainWnd();
	CNameGisView* pMapView = (CNameGisView*)(pMainWnd->
		                     m_wndSplitter.GetPane(0,0));
	
	if (m_pItmInfos[nIndex].szTable == "")
	{
		m_FeatureInfoList.AddString("没有详细信息"); 
		goto FLASH;
	}
	else
	{
		CDaoDatabase* tmpDB = new CDaoDatabase;
		try
		{
			tmpDB->Open(pMainWnd->m_environment.m_szDBName);
		}
		catch (CDaoException* e)
		{
			DisplayDaoException(e);
			delete tmpDB;
			e->Delete();
			return FALSE;
		}

		CDaoRecordset rs(tmpDB);
		try
		{
			CString szSQL;
			szSQL = "Select * From [" + m_pItmInfos[nIndex].szTable + "] Where "
				+ m_pItmInfos[nIndex].szFieldName +" ='"+ m_pItmInfos[nIndex].szName+"'";

			rs.Open(dbOpenDynaset, szSQL);
			if (0 == rs.GetRecordCount())
			{
				m_FeatureInfoList.AddString("没有详细信息");  
				goto FLASH;
			}
			
			COleVariant var;
			for (int i = 0; i < rs.GetFieldCount(); i ++)
			{	
				CDaoFieldInfo fieldInfo;
				rs.GetFieldInfo(i, fieldInfo, AFX_DAO_PRIMARY_INFO);
				var = rs.GetFieldValue(i);
				CString szValue = fieldInfo.m_strName + ":" 
					            +  CCrack::strVARIANT(var); 
				m_FeatureInfoList.AddString(szValue); 
			}
		}
		catch (CDaoException* e)
		{
			// DisplayDaoException(e);
			delete tmpDB;
			e->Delete();
			goto FLASH;			
		}

		if(tmpDB)
		{
			if(tmpDB->IsOpen())
			{
				tmpDB->Close();
			}

			delete tmpDB;
			tmpDB = NULL;
		}
	}

FLASH: 
	// 闪烁显示选择的地物4次
	pMapView->m_Map.FlashShape(m_pItmInfos[nIndex].rst.GetFields().Item(
		                  COleVariant("Shape")).GetValue().pdispVal, 4);
	
	//设置选中地物的符号
	if (pMainWnd->m_environment.m_layerInfos[nIndex].nCharacterIndex >= 0 
		&& pMainWnd->m_environment.m_layerInfos[nIndex].layer.GetShapeType()
		   == moShapeTypePoint)
	{
		if(pMainWnd->m_environment.m_selectedSymbol)
			pMainWnd->m_environment.m_selectedSymbol.ReleaseDispatch();
		pMainWnd->m_environment.m_selectedSymbol.CreateDispatch(
			                             _T("MapObjects2.Symbol"));		
		pMainWnd->m_environment.m_selectedSymbol.SetSymbolType(
			                             moPointSymbol);
		pMainWnd->m_environment.m_selectedSymbol.GetFont().SetName(
			        pMainWnd->m_environment.m_layerInfos[nIndex].szFontName);
		pMainWnd->m_environment.m_selectedSymbol.SetStyle(4);
		pMainWnd->m_environment.m_selectedSymbol.SetSize(pMainWnd->
			m_environment.m_layerInfos[nIndex].layer.GetSymbol().GetSize());
		pMainWnd->m_environment.m_selectedSymbol.SetCharacterIndex(
			pMainWnd->m_environment.m_layerInfos[nIndex].nCharacterIndex);
		pMainWnd->m_environment.m_selectedSymbol.SetColor(0xff);
        
		pMainWnd->m_environment.m_selectedSymbolSize = 
			pMainWnd->m_environment.m_layerInfos[nIndex].nSymSize;
	}
	else
	{
		if (pMainWnd->m_environment.m_layerInfos[nIndex].layer.GetShapeType() 
			                                   == moShapeTypePoint)
		{
			if(pMainWnd->m_environment.m_selectedSymbol)
				pMainWnd->m_environment.m_selectedSymbol.ReleaseDispatch();
			pMainWnd->m_environment.m_selectedSymbol.CreateDispatch(
				_T("MapObjects2.Symbol"));            
			pMainWnd->m_environment.m_selectedSymbol.SetSymbolType(pMainWnd->
				m_environment.m_layerInfos[nIndex].layer.GetSymbol().GetSymbolType());
			pMainWnd->m_environment.m_selectedSymbol.SetStyle(pMainWnd->
				m_environment.m_layerInfos[nIndex].layer.GetSymbol().GetStyle());
			pMainWnd->m_environment.m_selectedSymbol.SetSize(pMainWnd->
				m_environment.m_layerInfos[nIndex].layer.GetSymbol().GetSize());
			pMainWnd->m_environment.m_selectedSymbol.SetColor(0xff);
            
			pMainWnd->m_environment.m_selectedSymbolSize = 
				pMainWnd->m_environment.m_layerInfos[nIndex].nSymSize;
		}
		else
			pMainWnd->m_environment.m_selectedSymbol = NULL;
	}
    
	CMoFields fields = m_pItmInfos[nIndex].rst.GetFields();
	pMainWnd->m_environment.m_selectedFeature = 
		fields.Item(COleVariant("Shape")).GetValue().pdispVal;
	pMapView->m_Map.SetExtent(pMapView->m_Map.GetExtent()); 

	return TRUE;
}
//----------------------------------------------------------------------------------------------
int CInfoDlg::GetIndex(CString szName)
{
	int nIndex = -1;

	CMainFrame* pMainWnd = (CMainFrame*)AfxGetMainWnd();
	CNameGisView* pMapView = (CNameGisView*)(pMainWnd->m_wndSplitter.GetPane(0,0));
	for (int i = 0; i < pMainWnd->m_environment.m_nLayerNum; i++ )
	{
		if (m_pItmInfos[i].szName == szName)
		{
			nIndex = i;
			break;
		}
	}
    
	return nIndex;
}
//----------------------------------------------------------------------------------------------
void CInfoDlg::OnCbnSelchangeInfoCombo()
{
	CMainFrame* pMainWnd = (CMainFrame*)AfxGetMainWnd();
	CNameGisView* pMapView = (CNameGisView*)(pMainWnd->m_wndSplitter.GetPane(0,0));

	if (m_nIdx != m_FeatureBox.GetCurSel())
	{
		m_nIdx = m_FeatureBox.GetCurSel();
		CString str;		
		m_FeatureBox.GetLBText(m_nIdx, str);
		int nIndex = GetIndex(str);
		LoadListBox(nIndex);
	}
	else
	{
		CString str;		
		m_FeatureBox.GetLBText(m_nIdx, str);
		int nIndex = GetIndex(str);
		CMoFields fields = m_pItmInfos[nIndex].rst.GetFields();
		pMapView->m_Map.FlashShape(fields.Item(
			COleVariant("Shape")).GetValue().pdispVal, 4);
		return;
	}
}
//----------------------------------------------------------------------------------------------