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下面这段饼图的代码展示了美国不同州的几种水果产量情况。ProEssentials v7在之前的版本上做了一些改进，在图表上滚动鼠标可以分别查看几种水果的产量图表。双击饼图上的标签，还可以将饼图对应的那一块分离出来。这个饼图还 将那些太小的分片集合分类成*Other，这样可以提高图表数据的可读性。要体验ProEssentials v7的功能，请下载ProEssentials v7。
下面是ProEssentials v7创建简单饼图的源代码：
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void CPEView::CreateSimplePie()
{
RECT rect;
GetClientRect( &rect );
// Construct Object //
m_hPE = PEcreate(PECONTROL_PIE, WS_VISIBLE, &rect, m_hWnd, 1001);
PEnset(m_hPE, PEP_nSUBSETS, 5);
PEnset(m_hPE, PEP_nPOINTS, 12);
int s,p;
for (s=0; s<5; s++)
{
for (p=0; p<12; p++)
{
float f1 = (float) GetRandom(1, 5) + ((float) GetRandom(1, 100) / 100.0F);
PEvsetcellEx(m_hPE, PEP_faXDATA, s, p, &f1);
}
}
float f1= 0.0F;
PEvsetcellEx(m_hPE, PEP_faXDATA, 0, 3, &f1);
// Set Subset labels //
PEvsetcell( m_hPE, PEP_szaSUBSETLABELS, 0, TEXT("Apples" ));
PEvsetcell( m_hPE, PEP_szaSUBSETLABELS, 1, TEXT("Oranges" ));
PEvsetcell( m_hPE, PEP_szaSUBSETLABELS, 2, TEXT("Pears" ));
PEvsetcell( m_hPE, PEP_szaSUBSETLABELS, 3, TEXT("Plums" ));
PEvsetcell( m_hPE, PEP_szaSUBSETLABELS, 4, TEXT("Peaches" ));
// Set Slice Labels //
PEvsetcell( m_hPE, PEP_szaPOINTLABELS, 0, TEXT("Texas" ));
PEvsetcell( m_hPE, PEP_szaPOINTLABELS, 1, TEXT("Oklahoma" ));
PEvsetcell( m_hPE, PEP_szaPOINTLABELS, 2, TEXT("Kansas"));
PEvsetcell( m_hPE, PEP_szaPOINTLABELS, 3, TEXT("New Mexico" ));
PEvsetcell( m_hPE, PEP_szaPOINTLABELS, 4, TEXT("Colorado" ));
PEvsetcell( m_hPE, PEP_szaPOINTLABELS, 5, TEXT("Wyoming" ));
PEvsetcell( m_hPE, PEP_szaPOINTLABELS, 6, TEXT("Utah" ));
PEvsetcell( m_hPE, PEP_szaPOINTLABELS, 7, TEXT("Arizona" ));
PEvsetcell( m_hPE, PEP_szaPOINTLABELS, 8, TEXT("Nebraska" ));
PEvsetcell( m_hPE, PEP_szaPOINTLABELS, 9, TEXT("South Dakota" ));
PEvsetcell( m_hPE, PEP_szaPOINTLABELS, 10, TEXT("North Dakota" ));
PEvsetcell( m_hPE, PEP_szaPOINTLABELS, 11, TEXT("Iowa" ));
// Set Slice Colors //
DWORD c[13];
c[0] = PERGB( 255, 198, 0, 0);
c[1] = PERGB( 255, 0, 198, 0);
c[2] = PERGB( 255, 198, 198, 0);
c[3] = PERGB( 255, 0, 0, 198);
c[4] = PERGB( 255, 198, 0, 198);
c[5] = PERGB( 255, 0, 198, 198);
c[6] = PERGB( 255, 192, 192, 192);
c[7] = PERGB( 255, 148, 0, 0);
c[8] = PERGB( 255, 0, 148, 0);
c[9] = PERGB( 255, 148, 148, 0);
c[10] = PERGB( 255,0, 168, 168);
c[11] = PERGB( 255, 132, 132, 132);
c[12] = PERGB( 255, 0, 0, 0);
PEvset(m_hPE, PEP_dwaSUBSETCOLORS, c, 13);
// Set Main Title
PEszset(m_hPE, PEP_szMAINTITLE, TEXT("Produce by State"));
PEszset(m_hPE, PEP_szSUBTITLE, TEXT("")); // no subtitle
// Set various other properties //
PEnset(m_hPE, PEP_nDATAPRECISION, 1);
PEnset(m_hPE, PEP_nGROUPINGPERCENT, 4);
PEnset(m_hPE, PEP_nDATASHADOWS, PEDS_3D);
PEnset(m_hPE, PEP_bDISABLE3DSHADOW, FALSE);
PEnset(m_hPE, PEP_nAUTOEXPLODE, PEAE_ALLSUBSETS);
PEnset(m_hPE, PEP_bFOCALRECT, FALSE);
PEnset(m_hPE, PEP_bPREPAREIMAGES, TRUE);
PEnset(m_hPE, PEP_bCACHEBMP, TRUE);
PEnset(m_hPE, PEP_nFONTSIZE, PEFS_MEDIUM);
PEnset(m_hPE, PEP_bFIXEDFONTS, TRUE);
PEnset(m_hPE, PEP_bBITMAPGRADIENTMODE, TRUE);
PEnset(m_hPE, PEP_nQUICKSTYLE, PEQS_LIGHT_NO_BORDER);
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_nFONTSIZE, PEFS_LARGE);
// 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 );
}
//***************************************
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