addthemedlg.cpp

需要先下载安装mapx

// AddThemeDlg.cpp : implementation file
//
/* This sample application and corresponding sample code is provided 
 * for example purposes only.  It has not undergone rigorous testing 
 * and as such should not be shipped as part of a final application 
 * without extensive testing on the part of the organization releasing 
 * the end-user product.
 */

#include "stdafx.h"
#include "mapxsamp.h"
#include "AddThemeDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CAddThemeDlg dialog


CAddThemeDlg::CAddThemeDlg(CWnd* pParent /*=NULL*/)
	: CDialog(CAddThemeDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CAddThemeDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	m_bMultiVar=FALSE;
	m_pMapX = NULL;
	m_nThemeType = 0;
}


void CAddThemeDlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CAddThemeDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
	DDX_Control(pDX, IDC_FIELDS, m_ckListBox);
}


BEGIN_MESSAGE_MAP(CAddThemeDlg, CDialog)
	//{{AFX_MSG_MAP(CAddThemeDlg)
	ON_CBN_SELCHANGE(IDC_DATASETS, OnSelchangeDatasets)
	ON_CBN_SELCHANGE(IDC_THEMETYPES, OnSelchangeThemetypes)
	//}}AFX_MSG_MAP
	ON_CLBN_CHKCHANGE(IDC_FIELDS, OnCheckChange)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CAddThemeDlg message handlers

BOOL CAddThemeDlg::OnInitDialog() 
{
	CDialog::OnInitDialog();
	ASSERT(m_pMapX);
	
	// add datasets to combo
	// combo is not sorted, so combo index = dataset index
	CComboBox *pDatasetCombo = (CComboBox *)GetDlgItem(IDC_DATASETS);
	ASSERT(pDatasetCombo);
	pDatasetCombo->AddString("<None>");
	try {
		CMapXDatasets dss = m_pMapX->GetDatasets();
		long nCount = dss.GetCount();

		for (long i=1; i<=nCount; i++) {
			CMapXDataset ds = dss[i];

			pDatasetCombo->AddString(ds.GetName());
		}
		if (nCount > 0) {
			pDatasetCombo->SetCurSel(1);
		}
	}
	catch (COleDispatchException *e) {
		e->ReportError();
		e->Delete();
	}
	catch (COleException *e) {
		e->ReportError();
		e->Delete();
	}

	// add themetypes to combo
	// combo is not sorted, so combo index = theme type
	CComboBox *pThemeCombo = (CComboBox *)GetDlgItem(IDC_THEMETYPES);
	ASSERT(pThemeCombo);

	pThemeCombo->AddString("Ranged");
	pThemeCombo->AddString("Bar Chart");
	pThemeCombo->AddString("Pie Chart");
	pThemeCombo->AddString("Graduated Symbol");
	pThemeCombo->AddString("Dot Density");
	pThemeCombo->AddString("Individual Value");
	pThemeCombo->AddString("Auto");
	pThemeCombo->SetCurSel(6); // auto
	m_nThemeType = 6;
	
	// add dataset fields to listbox
	InitListBox();

	return TRUE;  // return TRUE unless you set the focus to a control
	              // EXCEPTION: OCX Property Pages should return FALSE
}

void CAddThemeDlg::OnSelchangeDatasets() 
{
	InitListBox();
}

void CAddThemeDlg::OnSelchangeThemetypes() 
{
	int n;
	CComboBox *pCombo = (CComboBox *)GetDlgItem(IDC_THEMETYPES);
	n = pCombo->GetCurSel();
	if (n != -1) {
		m_nThemeType = n;
		m_bMultiVar = (m_nThemeType == miThemeBarChart || m_nThemeType == miThemePieChart);
		if (m_bMultiVar)
			return;
		// single var theme
		// make sure only 1 checked
		int num=m_ckListBox.GetCount();
		int i;
		BOOL bFirst=TRUE;
		for (i=0;i<num;i++) {
			if (m_ckListBox.GetCheck(i)) {
				m_ckListBox.SetCheck(i, bFirst);
				bFirst=FALSE;
			}
		}
	}
}

// Add a theme and keep dialog open
void CAddThemeDlg::OnOK() 
{
	try {
		VARIANT Type; 
		COptionalVariant Name;
		VARIANT Field;
		CMapXFields flds;
		int nDataset = ((CComboBox *)GetDlgItem(IDC_DATASETS))->GetCurSel();

		if (nDataset <= 0) {
			AfxMessageBox("No Dataset selected");
			return;
		}
		CMapXDataset ds = m_pMapX->GetDatasets().Item(nDataset);
		CMapXFields dsflds = ds.GetFields();

		// set theme type
		Type.vt = VT_I4;
		Type.lVal = m_nThemeType;

		// use default name
		Name.vt = VT_ERROR;
		Name.scode = DISP_E_PARAMNOTFOUND;

		// create a fields collection of 1 or more fields
		// to create theme on
		int num=m_ckListBox.GetCount();
		long i;

		flds.CreateDispatch(flds.GetClsid());
		for (i=0;i<num;i++) {
			if (m_ckListBox.GetCheck(i)) {
				CMapXField fld = dsflds[i+1L];
				flds.Add(fld.GetName(), fld.GetName());
			}
		}
		if (flds.GetCount() <= 0) {
			// assume we are letting mapx pick field
			if (m_bMultiVar) {
				AfxMessageBox("For Bar and Pie themes, you must choose at least 1 field");
				return;
			}
			Field.vt = VT_ERROR;
			Field.scode = DISP_E_PARAMNOTFOUND;
		}
		else {
			Field.vt = VT_DISPATCH;
			Field.pdispVal = flds;
		}

		// get themes collection
		CMapXThemes objThemes = ds.GetThemes();

		// add theme - will be visible by default
		CMapXTheme thm = objThemes.Add(Type, Field, Name);
	}
	catch (COleDispatchException *e) {
		e->ReportError();
		e->Delete();
	}
	catch (COleException *e) {
		e->ReportError();
		e->Delete();
	}

}

// fill in dataset fields based on selected dataset
void CAddThemeDlg::InitListBox() 
{
	int nDataset = ((CComboBox *)GetDlgItem(IDC_DATASETS))->GetCurSel();
	m_ckListBox.ResetContent();

	// no dataset selected
	if (nDataset <= 0) {
		return;
	}
	try {
		CMapXDataset ds = m_pMapX->GetDatasets().Item(nDataset);
		CMapXFields flds = ds.GetFields();
		long nFieldCount = flds.GetCount();

		for (long i=1; i<=nFieldCount; i++) {
			CMapXField fld = flds[i];

			int n=m_ckListBox.AddString(fld.GetName());
			m_ckListBox.SetItemData(n, (DWORD)i);
		}
	}
	catch (COleDispatchException *e) {
		e->ReportError();
		e->Delete();
	}
	catch (COleException *e) {
		e->ReportError();
		e->Delete();
	}
}

void CAddThemeDlg::OnCheckChange() 
{
	int n = m_ckListBox.GetCurSel();
	int num=m_ckListBox.GetCount();
	int i;

	if (n == -1)
		return;

	BOOL b = m_ckListBox.GetCheck(n);
	if (!m_bMultiVar) {
		for (i=0;i<num;i++) {
			if(i!=n)
				m_ckListBox.SetCheck(i, 0);
		}
	}
}