图表控件ProEssentials创建极坐标代码

极坐标图表是一种圆形极线图，上面的数据点使用角度和到中心点的距离来表示。 X轴位于圆圈的边界上，Y 轴连接圆心与 X 轴，图表上的每一个数据点对应一对X,Y值。下面我用工控图表控件ProEssentials介绍如何创建一个简单的极坐标图表。

极坐标图表：



ProEssentials创建极坐标图表源代码：

void CPEView::CreateSimplePolar()

{

//! Right button click to show popup menu. //

//! Double Click to show customization dialog. //

//! Left-Click and drag to draw zoom box. Use popup memu or 'z'
to undo zoom. //

// Simple example show the basics of a polar object. //

// Polar Graph's contain both YData and XData. //

RECT rect;

GetClientRect( &rect );

// Construct Object //

m_hPE = PEcreate(PECONTROL_PGRAPH, WS_VISIBLE, &rect, m_hWnd, 1001);

PEnset(m_hPE, PEP_nSUBSETS, 2);

PEnset(m_hPE, PEP_nPOINTS, 360);

int p;

float f1, f2;

for (p=0; p<360; p++)

{

f1 = (float) p;

f2 = (float) 150 * sin((double) p * 0.054F);

PEvsetcellEx(m_hPE, PEP_faXDATA, 0, p, &f1);

PEvsetcellEx(m_hPE, PEP_faYDATA, 0, p, &f2);

}

for (p=0; p<360; p++)

{

f1 = (float) p;

f2 = (float) 150 * sin(((double) p * 0.044F)) * 2;

PEvsetcellEx(m_hPE, PEP_faXDATA, 1, p, &f1);

PEvsetcellEx(m_hPE, PEP_faYDATA, 1, p, &f2);

}

PEnset(m_hPE, PEP_nPLOTTINGMETHOD, PEGPM_LINE);

PEnset(m_hPE, PEP_nALLOWZOOMING, 1);

PEszset(m_hPE, PEP_szMAINTITLE, TEXT("Polar Chart"));

PEszset(m_hPE, PEP_szSUBTITLE, TEXT("")); // no subtitle

float ftmp = .9F;

PEvset(m_hPE, PEP_fFONTSIZELEGENDCNTL, &ftmp, 1 );

PEnset(m_hPE, PEP_bPREPAREIMAGES, TRUE);

PEnset(m_hPE, PEP_bCACHEBMP, TRUE);

PEnset(m_hPE, PEP_bFOCALRECT, FALSE);

// Set line types

int nTypes[] = { PELT_MEDIUMSOLID, PELT_MEDIUMSOLID };

PEvset(m_hPE, PEP_naSUBSETLINETYPES, nTypes, 2);

// Set point types

int nPTypes[] = { PEPT_DOTSOLID, PEPT_PLUS };

PEvset(m_hPE, PEP_naSUBSETPOINTTYPES, nTypes, 2);

// subset colors

DWORD dwArray[2] = { PERGB(128, 198,0,0), PERGB(128, 0, 198, 0)
};

PEvset( m_hPE, PEP_dwaSUBSETCOLORS, dwArray, 2);

// subset labels

PEvsetcell( m_hPE, PEP_szaSUBSETLABELS, 0, TEXT("Signal #1" ));

PEvsetcell( m_hPE, PEP_szaSUBSETLABELS, 1, TEXT("Signal #2" ));

double dnull = -99999.0F;

PEvset(m_hPE, PEP_fNULLDATAVALUEX, &dnull, 1);

PEvset(m_hPE, PEP_fNULLDATAVALUE, &dnull, 1);

// Set Various other features //

PEnset(m_hPE, PEP_bFIXEDFONTS, TRUE);

PEnset(m_hPE, PEP_bBITMAPGRADIENTMODE, TRUE);

PEnset(m_hPE, PEP_nQUICKSTYLE, PEQS_MEDIUM_NO_BORDER);

PEnset(m_hPE, PEP_bSIMPLEPOINTLEGEND, TRUE);

PEnset(m_hPE, PEP_bSIMPLELINELEGEND, TRUE);

PEnset(m_hPE, PEP_nLEGENDSTYLE, PELS_1_LINE);

PEnset(m_hPE, PEP_nZOOMSTYLE, PEZS_RO2_NOT);

PEnset(m_hPE, PEP_nPOINTSIZE, PEPS_SMALL);

PEnset(m_hPE, PEP_nTEXTSHADOWS, PETS_BOLD_TEXT);

PEnset(m_hPE, PEP_bMAINTITLEBOLD, TRUE);

PEnset(m_hPE, PEP_bSUBTITLEBOLD, TRUE);

PEnset(m_hPE, PEP_bLABELBOLD, TRUE);

PEnset(m_hPE, PEP_bLINESHADOWS, TRUE);

PEnset(m_hPE, PEP_nFONTSIZE, PEFS_MEDIUM);

PEnset(m_hPE, PEP_nGRADIENTBARS, 8);

PEnset(m_hPE, PEP_nDATASHADOWS, PEDS_SHADOWS);

float f = 1.2F;

PEvset(m_hPE, PEP_fFONTSIZEGNCNTL, &f, 1);

PEnset(m_hPE, PEP_nIMAGEADJUSTBOTTOM, 100);

// Improves metafile export //

PEnset(m_hPE, PEP_nDPIX, 600);

PEnset(m_hPE, PEP_nDPIY, 600);

// Set Demo's RenderEngine to Gdi Plus //

CMDIFrameWnd* pWnd = (CMDIFrameWnd*) AfxGetApp()->GetMainWnd();

pWnd->SendMessage(WM_CHANGE_METAFILE, PEPLAYMETAFILEGDIPLUS );

}