CElement* CSketcherView::CreateElement(void) const
{
// Get a pointer to the document for this view
CSketcherDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc); // Verify the pointer is good
// Now select the element using the type stored in the document
switch(pDoc->GetElementType())
{
case RECTANGLE:
return new CRectangle(m_FirstPoint, m_SecondPoint,pDoc->GetElementColor(),pDoc->GetElementPenStyle());
case CIRCLE:
return new CCircle(m_FirstPoint, m_SecondPoint, pDoc->GetElementColor(),pDoc->GetElementPenStyle());
case CURVE:
return new CCurve(new CPoint(m_FirstPoint), new CPoint(m_SecondPoint), pDoc->GetElementColor(),pDoc->GetElementPenStyle());
case LINE:
return new CLine(m_FirstPoint, m_SecondPoint, pDoc->GetElementColor(),pDoc->GetElementPenStyle());
case ELLIPSE:
return new CEllipse(m_FirstPoint, m_SecondPoint, pDoc->GetElementColor(),pDoc->GetElementPenStyle());
default:
// Something's gone wrong
AfxMessageBox(_T("Bad Element code"), MB_OK);
AfxAbort();
return nullptr;
}
}
void CSketcherView::OnLButtonDown(UINT nFlags, CPoint point)
{
CClientDC aDC(this); // Create a device context
OnPrepareDC(&aDC); // Get origin adjusted
aDC.DPtoLP(&point); // Convert point to logical coordinatesm_FirstPoint = point; // Record the cursor position
if(m_MoveMode)
{
// In moving mode, so drop the element
m_MoveMode = false; // Kill move mode
m_pSelected = nullptr; // De-select the element
GetDocument()->UpdateAllViews(0); // Redraw all the views
GetDocument()->SetModifiedFlag();
return;
}
CSketcherDoc* pDoc = GetDocument();// Get a document pointer
if(pDoc->GetElementType() == TEXT)
{
CTextDialog aDlg;
if(aDlg.DoModal() == IDOK)
{
// Exit OK so create a text element
CSize textExtent = aDC.GetTextExtent(aDlg.m_TextString);
CRect rect(point, textExtent); //Create enclosing rectangle
CText* pTextElement = new CText(
aDlg.m_TextString, rect, pDoc->GetElementColor());
// Add the element to the document
pDoc->AddElement(pTextElement);
// Get all views updated
pDoc->UpdateAllViews(nullptr, 0, pTextElement);
}
return;
}
m_FirstPoint = point; // Record the cursor position
SetCapture(); // Capture subsequent mouse messages
}