Several ways to draw straight lines-xinxin Sun C + + notes

//HDC Draw Straight lineCPoint M_ptorigin;voidCdrawview::onlbuttondown (UINT nflags, CPoint point) {m_ptorigin=Point ; Cview::onlbuttondown (nflags, point);}voidCdrawview::onlbuttonup (UINT nflags, CPoint point) {HDC hdc; HDC=:: GetDC (M_hwnd);  Movetoex (hdc, m_ptorigin.x, M_PTORIGIN.Y, NULL);  LineTo (hdc, Point.x, POINT.Y);  :: ReleaseDC (M_hwnd, HDC); Cview::onlbuttonup (nflags, point);}//CDC Draw LinevoidCdrawview::onlbuttondown (UINT nflags, CPoint point) {m_ptorigin=Point ; Cview::onlbuttondown (nflags, point);}voidCdrawview::onlbuttonup (UINT nflags, CPoint point) {CDC*PDC =GetDC (); PDC-MoveTo (M_ptorigin); PDC-LineTo (point);  ReleaseDC (PDC); Cview::onlbuttonup (nflags, point);}//CClientDC, CWINDOWDC draw straight linevoidCdrawview::onlbuttondown (UINT nflags, CPoint point) {m_ptorigin=Point ; Cview::onlbuttondown (nflags, point);}voidCdrawview::onlbuttonup (UINT nflags, CPoint point) {cclientdc DC ( This);//draw to Customer areaCCLIENTDC DC (GetParent ());//draw to the customer area + toolbarsCWINDOWDC DC ( This);//draw to Customer areaCWINDOWDC DC (GetParent ());//draw to client area + Toolbar + menu bar + title barCWINDOWDC DC (GetDesktopWindow ());//Draw the entire screen windowDC.  MoveTo (M_ptorigin); dc.  LineTo (point); Cview::onlbuttonup (nflags, point);}//a colored linevoidCdrawview::onlbuttondown (UINT nflags, CPoint point) {m_ptorigin=Point ; Cview::onlbuttondown (nflags, point);}voidCdrawview::onlbuttonup (UINT nflags, CPoint point) {CPen pen (ps_solid,1, RGB (255,0,0)); CCLIENTDC DC ( This); CPen*poldpen = DC. SelectObject (&pen); dc.  MoveTo (M_ptorigin); dc.  LineTo (point); dc.  SelectObject (Poldpen); Cview::onlbuttonup (nflags, point);}//painting BrushesvoidCdrawview::onlbuttondown (UINT nflags, CPoint point) {m_ptorigin=Point ; Cview::onlbuttondown (nflags, point);}voidCdrawview::onlbuttonup (UINT nflags, CPoint point) {CBrush brush (RGB (255,0,0)); CCLIENTDC DC ( This); dc. FillRect (CRect (M_ptorigin, point),&brush); Cview::onlbuttonup (nflags, point);}//bit drawing BrushvoidCdrawview::onlbuttondown (UINT nflags, CPoint point) {m_ptorigin=Point ; Cview::onlbuttondown (nflags, point);}voidCdrawview::onlbuttonup (UINT nflags, CPoint point) {CBitmap bitmap; Bitmap.  LoadBitmap (IDB_BITMAP1); CBrush Brush (&bitmap); CCLIENTDC DC ( This); dc. FillRect (CRect (M_ptorigin, point),&brush); Cview::onlbuttonup (nflags, point);}//Transparent painting BrushvoidCdrawview::onlbuttondown (UINT nflags, CPoint point) {m_ptorigin=Point ; Cview::onlbuttondown (nflags, point);}voidCdrawview::onlbuttonup (UINT nflags, CPoint point) {cclientdc DC ( This); //DC. Rectangle (CRect (M_ptorigin, point)); //not transparentCBrush *pbrush =Cbrush::fromhandle ((hbrush) Getstockobject (Null_brush)); CBrush*poldbrush =DC.  SelectObject (Pbrush); dc.  Rectangle (CRect (M_ptorigin, point)); dc.    SelectObject (Poldbrush); //TransparentCview::onlbuttonup (nflags, point);}//write with a brushvoidCdrawview::onlbuttondown (UINT nflags, CPoint point) {m_ptorigin=Point ; M_bdraw=TRUE; Cview::onlbuttondown (nflags, point);}voidCdrawview::onlbuttonup (UINT nflags, CPoint point) {M_bdraw=FALSE; Cview::onlbuttonup (nflags, point);}voidCdrawview::onmousemove (UINT nflags, CPoint point) {cclientdc DC ( This); CPen Pen (ps_solid,1, RGB (255,0,0)); CPen*poldpen = DC. SelectObject (&pen); if(M_bdraw = =TRUE) {DC.    MoveTo (M_ptorigin); dc.    LineTo (point); M_ptorigin=Point ; } DC.    SelectObject (Poldpen); Cview::onmousemove (nflags, point);}//Draw FanCPoint M_ptold;voidCdrawview::onlbuttondown (UINT nflags, CPoint point) {m_ptorigin= M_ptold =Point ; M_bdraw=TRUE; Cview::onlbuttondown (nflags, point);}voidCdrawview::onlbuttonup (UINT nflags, CPoint point) {M_bdraw=FALSE; Cview::onlbuttonup (nflags, point);}voidCdrawview::onmousemove (UINT nflags, CPoint point) {cclientdc DC ( This); CPen Pen (ps_solid,1, RGB (255,0,0)); CPen*poldpen = DC. SelectObject (&pen); if(M_bdraw = =TRUE) {DC.    MoveTo (M_ptorigin); dc.    LineTo (M_ptold); //DC. MoveTo (M_ptorigin); //with no edgesdc. MoveTo (M_ptold);//with edgesDC.    LineTo (point); M_ptold=Point ; } DC.  SelectObject (Poldpen); Cview::onmousemove (nflags, point);}

Several ways to draw straight lines-xinxin Sun C + + notes