void CChildView::OnPaint()
{
CWnd::OnPaint();
if (m_uiShape == CROP_ENCODE)
{
CMyDC *dc;
RECT rcClient;
LONG lHalfHeight, lHalfWidth;
dc = (CMyDC *)GetDC();
GetWindowRect(&rcClient);
lHalfWidth = (rcClient.right - rcClient.left) >> 1;
lHalfHeight = (rcClient.bottom - rcClient.top) >> 1;
rcClient.bottom -= lHalfHeight >> 1;
rcClient.top += lHalfHeight >> 1;
rcClient.right -= lHalfWidth >> 1;
rcClient.left += lHalfWidth >> 1;
ScreenToClient(&rcClient);
dc->Rectangle(&rcClient);
if (m_uiClipCnt)
{
CPen *pOldPen, pen;
pen.CreatePen(PS_SOLID, 5, RGB(255, 0, 0));
pOldPen = dc->SelectObject(&pen);
for (UINT i = 0; i != m_uiClipCnt; ++i)
{
dc->MoveTo(m_ptCrop[i]);
dc->LineTo(m_ptCrop[i]);
}
dc->SelectObject(pOldPen);
}
if (m_uiClipCnt == 2)
{
if (EncodeCrop(&m_ptCrop[0], &m_ptCrop[1], &rcClient))
{
dc->MoveTo(m_ptCrop[0]);
dc->LineTo(m_ptCrop[1]);
}
m_uiClipCnt = 0;
}
::ReleaseDC(m_hWnd, dc->m_hDC);
}
void CTrafficButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
{
// TODO: 添加您的代码以绘制指定项
ASSERT( lpDrawItemStruct != NULL );
CDC * pDC = CDC::FromHandle( lpDrawItemStruct -> hDC );
int erg = pDC->SelectClipRgn(&ShapeDCRegion);
CRect rect = lpDrawItemStruct -> rcItem;
UINT state = lpDrawItemStruct -> itemState;
UINT nStyle = GetStyle( );
int nSavedDC = pDC -> SaveDC( );
// Create the brush for the color bar
if(brushInitalized == FALSE)
{
CBitmap bmp;
CMyDC *memDC = new CMyDC(pDC);
RECT clipRect;
memDC->GetClipBox(&clipRect);
if(clipRect.right - clipRect.left > 1)
{
bmp.CreateCompatibleBitmap(memDC,plotgranularity, TGSize.cy);
CBitmap *pOld = memDC->SelectObject(&bmp);
CSize bmps = bmp.GetBitmapDimension();
// Need for scaling the color to the size of button
double factor = 255.0 / (float)TGSize.cy;
BYTE r,g,b;
for(int x = 0; x<TGSize.cy; x++)
{
g = (BYTE)(255-factor*x);
r = (BYTE)(factor*x);
b = (BYTE)64;
memDC->SetPixelV(0,x,RGB(r,g,b));
memDC->SetPixelV(1,x,RGB(r,g,b));
}
memDC->SelectObject(pOld);
colorbrush.CreatePatternBrush(&bmp);
brushInitalized = TRUE;
}
delete memDC;
}
if(initalized == TRUE)
{
COLORREF backcolor = GetSysColor(COLOR_BTNFACE);
CBrush brush;
CMyDC *memDC = new CMyDC(pDC);
RECT clipRect;
memDC->GetClipBox(&clipRect);
memDC->FillSolidRect(&clipRect,backcolor);
CFont *oldFont;
int xp, yp, xx, yy;
orgBrushOrigin = memDC->GetBrushOrg();
oldFont = memDC->SelectObject(&smallFont);
double scale = TGSize.cy / (maxSpeed/1024.0);
yp = TrafficDrawRectangle.bottom;
xp = TrafficDrawRectangle.left;
RECT fillrect;
// Fill the background
back = memDC->GetBkColor();
brush.CreateSolidBrush(darkblue);//back);
memDC->FillRect(&TrafficDrawRectangle, &brush);
//画网格
int xgridlines, ygridlines;
xgridlines = TGSize.cx / gridxresolution;
ygridlines = TGSize.cy / gridyresolution;
CPen* oldPen = memDC->SelectObject(&GridPen);
// Create the vertical lines
for (int x=0; x<= xgridlines; x++)
{
memDC->MoveTo(x*gridxresolution + gridxstartpos, 0 );
memDC->LineTo(x*gridxresolution + gridxstartpos, TGSize.cy );
}
// And the horizontal lines
for (int y=0; y<= ygridlines; y++)
{
memDC->MoveTo(0 , gridystartpos + TGSize.cy - y*gridyresolution - 2);
memDC->LineTo(TGSize.cx , gridystartpos + TGSize.cy - y*gridyresolution - 2);
}
gridxstartpos += gridscrollxspeed;
gridystartpos += gridscrollyspeed;
if(gridxstartpos < 0 ) gridxstartpos += gridxresolution;
if(gridxstartpos > gridxresolution ) gridxstartpos -= gridxresolution;
if(gridystartpos < 0 ) gridystartpos += gridyresolution;
if(gridystartpos > gridyresolution ) gridystartpos -= gridyresolution;
memDC->SelectObject(oldPen );
for(DWORD cnt=0; cnt<TrafficEntries; cnt++)
{
xx = xp + cnt*plotgranularity;
yy = yp - (int)(TrafficStats[cnt] * scale);
// Just paint if we are connected...
fillrect.bottom = yp;
fillrect.top = yy;
fillrect.left = xx;
fillrect.right = xx+plotgranularity;
memDC->SetBrushOrg(xx,yp);
//TRACE("TrafficStats[%d]: %f\n", cnt,TrafficStats[cnt]);
if(TrafficStats[cnt] > 0.0)
{
//画柱状图
memDC->FillRect(&fillrect, &colorbrush);
memDC->SetPixelV(xx, yy, cyan);
}
}
COLORREF textcolor = memDC->GetTextColor();
int bkmode = memDC->GetBkMode();
memDC->SetBkMode(TRANSPARENT);
//输出统计信息
memDC->SetTextColor(cyan);
CString traffic;
traffic.Format(L"CUR: %.2f HHG: %.2f",curSpeed/1024.0,maxSpeed/1024.0);
memDC->TextOut(5,5,traffic);
memDC->SetTextColor(textcolor);
memDC->SetBkMode(bkmode);
memDC->SelectObject(oldFont);
memDC->SetBrushOrg(orgBrushOrigin.x, orgBrushOrigin.y);
delete memDC;
}
pDC -> RestoreDC( nSavedDC );
}
