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"Rectangle"(diagonallの塗りつぶし)の部分を塗りつぶす必要があります(この画像のように)。 MFCでの操作方法私の悪い英語のために申し訳ありません!長方形(C++、mfc)の塗りつぶし方法
void CKonokhovView::OnLButtonUp(UINT nFlags, CPoint point)
{
if (m_Dragging){
m_Dragging = 0;
::ReleaseCapture();
::ClipCursor(NULL);
CKonokhovDoc* pDoc = GetDocument();
CClientDC ClientDC(this);
CPen pen;
pen.CreatePen(PS_SOLID, 1, pDoc->docColor);
ClientDC.SelectObject(&pen);
ClientDC.SetROP2(R2_NOT);
ClientDC.Rectangle(m_PointOrigin.x, m_PointOrigin.y, m_PointOld.x, m_PointOld.y);
ClientDC.SetROP2(R2_COPYPEN);
CBrush* oldBrush = ClientDC.SelectObject(&nullBrush);
ClientDC.Rectangle(m_PointOrigin.x, m_PointOrigin.y, point.x, point.y);
pDoc->AddLine(m_PointOrigin.x, m_PointOrigin.y, point.x, point.y);
ClientDC.SelectObject(&oldBrush);
}
を –