void CClock::DrawTime( CDC *pDc )
{
CRect rtClient;
GetClientRect(&rtClient);
CDC dcTransparent;
dcTransparent.CreateCompatibleDC(pDc);
CBitmap bitTransParent;
bitTransParent.CreateCompatibleBitmap(pDc, rtClient.Width(),rtClient.Height());
dcTransparent.SelectObject(&bitTransParent);
// CRect rectReal(ix1, iy1, ix2, iy2);
dcTransparent.FillSolidRect(rtClient, RGB(255, 255, 255));
// dcTransparent.Draw3dRect(rectReal, RGB(111, 147, 188), RGB(111, 147, 188));
dcTransparent.BeginPath();
dcTransparent.MoveTo(rtClient.Width()/2, rtClient.Height()/2);
dcTransparent.LineTo(rtClient.Width()/2-80, rtClient.Height()/2);
float fEnd = 90.0f;
dcTransparent.AngleArc(rtClient.Width()/2, rtClient.Height()/2, 120, -180.0f, 270.0f);
dcTransparent.LineTo(rtClient.Width()/2, rtClient.Height()/2);
dcTransparent.EndPath();
CRgn rgn;
rgn.CreateFromPath(&dcTransparent);
dcTransparent.FillRgn(&rgn, &CBrush(RGB(188, 199, 216)));
//内
dcTransparent.BeginPath();
dcTransparent.MoveTo(rtClient.Width()/2, rtClient.Height()/2);
dcTransparent.LineTo(rtClient.Width()/2-40, rtClient.Height()/2);
dcTransparent.AngleArc(rtClient.Width()/2, rtClient.Height()/2, 40, -180.0f, 270.0f);
dcTransparent.LineTo(rtClient.Width()/2, rtClient.Height()/2);
dcTransparent.EndPath();
CRgn rgn1;
rgn1.CreateFromPath(&dcTransparent);
dcTransparent.FillRgn(&rgn1, &CBrush(RGB(255, 255, 0)));
if( ::AlphaBlend == 0 )
{
pDc->StretchBlt(0, 0, rtClient.Width(), rtClient.Height(),
&dcTransparent, 0, 0, rtClient.Width(), rtClient.Height(), SRCINVERT );
}else{
BLENDFUNCTION bf;
memset( &bf, 0, sizeof( bf ) );
bf.SourceConstantAlpha = 0x9f; //半透明
bf.BlendOp = AC_SRC_OVER;
::TransparentBlt(pDc->GetSafeHdc(), 0, 0, rtClient.Width(), rtClient.Height(),
dcTransparent.GetSafeHdc( ), 0, 0, rtClient.Width(), rtClient.Height(), RGB(255, 255, 255));
// ::AlphaBlend( memDC.GetSafeHdc(), 0, 0, rtClient.Width(), rtClient.Height(),
// dcTransparent.GetSafeHdc( ), 0, 0, rtClient.Width(), rtClient.Height(), bf );
}
bitTransParent.DeleteObject();
dcTransparent.DeleteDC();
}
void MyGraph::DrawSeriesPie(CDC& dc) const
{
VALIDATE;
ASSERT_VALID(&dc);
// Determine width of pie display area (pie and space).
int nSeriesSpace(0);
int seriesCount = GetNonZeroSeriesCount();
int horizontalSpace(0);
if (m_saLegendLabels.GetSize()) {
// With legend box.
horizontalSpace = m_nXAxisWidth - m_rcLegend.Width() - (GAP_PIXELS * 2);
int nPieAndSpaceWidth(horizontalSpace / (seriesCount ? seriesCount : 1));
// Height is limiting factor.
if (nPieAndSpaceWidth > m_nYAxisHeight - (GAP_PIXELS * 2)) {
nSeriesSpace = (m_nYAxisHeight - (GAP_PIXELS * 2));
}
else {
// Width is limiting factor.
nSeriesSpace = nPieAndSpaceWidth;
}
}
else {
// No legend box.
horizontalSpace = m_nXAxisWidth;
// Height is limiting factor.
if (m_nXAxisWidth > m_nYAxisHeight * (seriesCount ? seriesCount : 1)) {
nSeriesSpace = m_nYAxisHeight;
}
else {
// Width is limiting factor.
nSeriesSpace = m_nXAxisWidth / (seriesCount ? seriesCount : 1);
}
}
// Make pies be centered horizontally
int xOrigin = m_ptOrigin.x + GAP_PIXELS + (horizontalSpace - nSeriesSpace * seriesCount) / 2;
// Create font for labels.
CFont fontLabels;
int pointFontHeight = max(m_rcGraph.Height() / Y_AXIS_LABEL_DIVISOR, MIN_FONT_SIZE);
VERIFY(fontLabels.CreatePointFont(pointFontHeight, _T("Arial"), &dc));
CFont* pFontOld = dc.SelectObject(&fontLabels);
ASSERT_VALID(pFontOld);
// Draw each pie.
int nPie(0);
int nRadius((int) (nSeriesSpace * INTERSERIES_PERCENT_USED / 2.0));
POSITION pos(m_olMyGraphSeries.GetHeadPosition());
while (pos) {
MyGraphSeries* pSeries = m_olMyGraphSeries.GetNext(pos);
ASSERT_VALID(pSeries);
// Don't leave a space for empty pies.
if (0 < pSeries->GetNonZeroElementCount()) {
// Locate this pie.
CPoint ptCenter;
ptCenter.x = xOrigin + (nSeriesSpace * nPie) + nSeriesSpace / 2;
ptCenter.y = m_ptOrigin.y - m_nYAxisHeight / 2;
CRect rcPie;
rcPie.left = ptCenter.x - nRadius;
rcPie.right = ptCenter.x + nRadius;
rcPie.top = ptCenter.y - nRadius;
rcPie.bottom = ptCenter.y + nRadius;
// Draw series label.
CSize sizPieLabel(dc.GetTextExtent(pSeries->GetLabel()));
VERIFY(dc.TextOut(ptCenter.x - (sizPieLabel.cx / 2),
ptCenter.y + nRadius + GAP_PIXELS, pSeries->GetLabel()));
// How much do the wedges total to?
double dPieTotal(pSeries->GetDataTotal());
// Draw each wedge in this pie.
CPoint ptStart(rcPie.left, ptCenter.y);
double dRunningWedgeTotal(0.0);
for (int nGroup = 0; nGroup < m_saLegendLabels.GetSize(); ++nGroup) {
// Ignore empty wedges.
if (0 < pSeries->GetData(nGroup)) {
// Get the degrees of this wedge.
dRunningWedgeTotal += pSeries->GetData(nGroup);
double dPercent(dRunningWedgeTotal * 100.0 / dPieTotal);
double degrees(360.0 * dPercent / 100.0);
// Find the location of the wedge's endpoint.
CPoint ptEnd(WedgeEndFromDegrees(degrees, ptCenter, nRadius));
// Special case: a wedge that takes up the whole pie would
// otherwise be confused with an empty wedge.
bool drawEmptyWedges = false;
if (1 == pSeries->GetNonZeroElementCount()) {
_ASSERTE(360 == (int)degrees && ptStart == ptEnd && "This is the problem we're correcting");
--ptEnd.y;
drawEmptyWedges = true;
}
// If the wedge is zero size or very narrow, don't paint it.
// If pie is small, and wedge data is small, we might get a wedges
// where center and both endpoints lie on the same coordinate,
// and endpoints differ only in one pixel. GDI draws such pie as whole pie,
// so we just skip them instead.
int distance = abs(ptStart.x-ptEnd.x) + abs(ptStart.y-ptEnd.y);
if (drawEmptyWedges || distance > 1) {
// Draw wedge.
COLORREF crWedge(m_dwaColors.GetAt(nGroup));
CBrush br(crWedge);
CBrush* pBrushOld = dc.SelectObject(&br);
ASSERT_VALID(pBrushOld);
VERIFY(dc.Pie(rcPie, ptStart, ptEnd));
// Create a region from the path we create.
VERIFY(dc.BeginPath());
VERIFY(dc.Pie(rcPie, ptStart, ptEnd));
VERIFY(dc.EndPath());
CRgn * prgnWedge = new CRgn;
VERIFY(prgnWedge->CreateFromPath(&dc));
pSeries->SetTipRegion(nGroup, prgnWedge);
// Cleanup.
dc.SelectObject(pBrushOld);
br.DeleteObject();
ptStart = ptEnd;
}
}
}
++nPie;
}
}
// Draw X axis title
CSize sizXLabel(dc.GetTextExtent(m_sXAxisLabel));
VERIFY(dc.TextOut(xOrigin + (nSeriesSpace * nPie - sizXLabel.cx)/2,
m_ptOrigin.y - m_nYAxisHeight/2 + nRadius + GAP_PIXELS*2 + sizXLabel.cy, m_sXAxisLabel));
VERIFY(dc.SelectObject(pFontOld));
fontLabels.DeleteObject();
}