いくつかの直線を描く方法-孫鑫C++ノート
9899 ワード
// HDC
CPoint m_ptOrigin ;
void CDrawView::OnLButtonDown(UINT nFlags, CPoint point)
{
m_ptOrigin = point;
CView::OnLButtonDown(nFlags, point);
}
void CDrawView::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
void CDrawView::OnLButtonDown(UINT nFlags, CPoint point)
{
m_ptOrigin = point;
CView::OnLButtonDown(nFlags, point);
}
void CDrawView::OnLButtonUp(UINT nFlags, CPoint point)
{
CDC *pDC = GetDC();
pDC->MoveTo(m_ptOrigin);
pDC->LineTo(point);
ReleaseDC(pDC);
CView::OnLButtonUp(nFlags, point);
}
// CClientDC、CWindowDC
void CDrawView::OnLButtonDown(UINT nFlags, CPoint point)
{
m_ptOrigin = point;
CView::OnLButtonDown(nFlags, point);
}
void CDrawView::OnLButtonUp(UINT nFlags, CPoint point)
{
CClientDC dc(this); //
CClientDC dc(GetParent()); // +
CWindowDC dc(this); //
CWindowDC dc(GetParent()); // + + +
CWindowDC dc(GetDesktopWindow()); //
dc.MoveTo(m_ptOrigin);
dc.LineTo(point);
CView::OnLButtonUp(nFlags, point);
}
//
void CDrawView::OnLButtonDown(UINT nFlags, CPoint point)
{
m_ptOrigin = point;
CView::OnLButtonDown(nFlags, point);
}
void CDrawView::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);
}
//
void CDrawView::OnLButtonDown(UINT nFlags, CPoint point)
{
m_ptOrigin = point;
CView::OnLButtonDown(nFlags, point);
}
void CDrawView::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);
}
//
void CDrawView::OnLButtonDown(UINT nFlags, CPoint point)
{
m_ptOrigin = point;
CView::OnLButtonDown(nFlags, point);
}
void CDrawView::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);
}
//
void CDrawView::OnLButtonDown(UINT nFlags, CPoint point)
{
m_ptOrigin = point;
CView::OnLButtonDown(nFlags, point);
}
void CDrawView::OnLButtonUp(UINT nFlags, CPoint point)
{
CClientDC dc(this);
// dc.Rectangle(CRect(m_ptOrigin, point)); //
CBrush *pBrush = CBrush::FromHandle((HBRUSH)GetStockObject(NULL_BRUSH));
CBrush *pOldBrush = dc.SelectObject(pBrush);
dc.Rectangle(CRect(m_ptOrigin, point));
dc.SelectObject(pOldBrush); //
CView::OnLButtonUp(nFlags, point);
}
//
void CDrawView::OnLButtonDown(UINT nFlags, CPoint point)
{
m_ptOrigin = point;
m_bDraw = TRUE;
CView::OnLButtonDown(nFlags, point);
}
void CDrawView::OnLButtonUp(UINT nFlags, CPoint point)
{
m_bDraw = FALSE;
CView::OnLButtonUp(nFlags, point);
}
void CDrawView::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);
}
//
CPoint m_ptOld;
void CDrawView::OnLButtonDown(UINT nFlags, CPoint point)
{
m_ptOrigin = m_ptOld = point;
m_bDraw = TRUE;
CView::OnLButtonDown(nFlags, point);
}
void CDrawView::OnLButtonUp(UINT nFlags, CPoint point)
{
m_bDraw = FALSE;
CView::OnLButtonUp(nFlags, point);
}
void CDrawView::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); //
dc.MoveTo(m_ptOld); //
dc.LineTo(point);
m_ptOld = point;
}
dc.SelectObject(pOldPen);
CView::OnMouseMove(nFlags, point);
}