// Create a new element on the heap
CElement* CSketcherView::CreateElement(void)
{
// 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->GetPenWidth());
case CIRCLE:
return new CCircle(m_FirstPoint, m_SecondPoint,
pDoc->GetElementColor(), pDoc->GetPenWidth());
case CURVE:
return new CCurve(m_FirstPoint, m_SecondPoint,
pDoc->GetElementColor(), pDoc->GetPenWidth());
case LINE:
return new CLine(m_FirstPoint, m_SecondPoint,
pDoc->GetElementColor(), pDoc->GetPenWidth());
default:
// Something's gone wrong
AfxMessageBox(_T("Bad Element code"), MB_OK);
AfxAbort();
return NULL;
}
}
void CSketcherView::OnElementDelete()
{
if(m_pSelected)
{
CSketcherDoc* pDoc = GetDocument();// Get the document pointer
pDoc->DeleteElement(m_pSelected); // Delete the element
pDoc->UpdateAllViews(nullptr); // Redraw all the views
m_pSelected = nullptr; // Reset selected element ptr
}
}
void CSketcherView::OnDraw(CDC* pDC)
{
CSketcherDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
if (!pDoc)
return;
CElement* pElement(0);
for(auto iter = pDoc->begin() ; iter != pDoc->end() ; ++iter)
{
pElement = *iter;
if(pDC->RectVisible(pElement->GetBoundRect())) // If the element is visible
pElement->Draw(pDC, m_pSelected); // ...draw it
}
}
void CSketcherView::OnDraw(CDC* pDC)
{
CSketcherDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
if(!pDoc)
return;
POSITION aPos = pDoc->GetListHeadPosition();
CElement* pElement = 0; // Store for an element pointer
while(aPos) // Loop while aPos is not null
{
pElement = pDoc->GetNext(aPos); // Get the current element pointer
// If the element is visible...
if(pDC->RectVisible(pElement->GetBoundRect()))
pElement->Draw(pDC, m_pSelected);// ...draw it
}
}
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
}
void CSketcherView::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo)
{
CScrollView::OnPrepareDC(pDC, pInfo);
CSketcherDoc* pDoc = GetDocument();
pDC->SetMapMode(MM_ANISOTROPIC); // Set the map mode
CSize DocSize = pDoc->GetDocSize(); // Get the document size
pDC->SetWindowExt(DocSize); // Now set the window extent
// Get the number of pixels per inch in x and y
int xLogPixels = pDC->GetDeviceCaps(LOGPIXELSX);
int yLogPixels = pDC->GetDeviceCaps(LOGPIXELSY);
// Calculate the viewport extent in x and y
int xExtent = (DocSize.cx*m_Scale*xLogPixels)/100;
int yExtent = (DocSize.cy*m_Scale*yLogPixels)/100;
pDC->SetViewportExt(xExtent,yExtent); // Set viewport extent
}
void CSketcherView::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo)
{
// TODO: Add your specialized code here and/or call the base class
CScrollView::OnPrepareDC(pDC, pInfo);
CSketcherDoc* pDoc = GetDocument();
pDC->SetMapMode(MM_ANISOTROPIC); // Set the map mode
CSize DocSize = pDoc->GetDocSize(); // Get the document size
// y extent must be negative because we want MM_LOENGLISH
DocSize.cy = -DocSize.cy; // Change sign of y
pDC->SetWindowExt(DocSize); // Now set the window extent
// Get the number of pixels per inch in x and y
int xLogPixels = pDC->GetDeviceCaps(LOGPIXELSX);
int yLogPixels = pDC->GetDeviceCaps(LOGPIXELSY);
// Calculate the viewport extent in x and y
long xExtent = static_cast<long>(DocSize.cx)*m_Scale*xLogPixels/100L;
long yExtent = static_cast <long>(DocSize.cy)*m_Scale*yLogPixels/100L;
pDC->SetViewportExt(static_cast<int>(xExtent),
static_cast<int>(-yExtent)); // Set viewport extent
}
void CSketcherView::OnLButtonUp(UINT nFlags, CPoint point)
{
// TODO: 在此添加消息处理程序代码和/或调用默认值
if ( m_DrawTrigger == 2 ) {
m_DrawTrigger = 0;
CClientDC aDC(this);
TCHAR sz[128]= {0};
//wsprintf(sz, _T("Called Times of OnMoveMouse is %d"), m_CalledTimes_OnMouseMove);
_stprintf_s(sz, _T("Called Times of OnMoveMouse is %08d"), m_CalledTimes_OnMouseMove);
aDC.TextOutW(0,0,sz);
// The format "%08d" will prevent last display length is bigger.
m_CalledTimes_OnMouseMove = 0;
CSketcherDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
if (!pDoc)
return;
TCHAR szColor[32] = {0};
TCHAR szElement[32] = {0};
switch(pDoc->GetColor()) {
case RED:
wcscat_s(szColor,L"red"); // 没有找到合适的_T定义函数
break;
case GREEN:
wcscat_s(szColor,L"green");
break;
case BLUE:
wcscat_s(szColor,L"blue");
break;
case BLACK:
wcscat_s(szColor,L"black");
break;
default:
wcscat_s(szColor,L"unknow");
break;
}
switch( pDoc->GetElement() ) {
case LINE:
wcscat_s(szElement,L"line");
break;
case RECTANGLE:
wcscat_s(szElement,L"rectangle");
break;
case CIRCLE:
wcscat_s(szElement,L"circle");
break;
case CURVE:
wcscat_s(szElement,L"curve");
break;
default:
wcscat_s(szElement,L"unknow");
break;
}
TCHAR sz1[128] = {0};
_stprintf_s(sz1, _T("Color is %s, and Element is %s "), szColor, szElement);
// The last spaces is to override last characters.
aDC.TextOutW(0,30,sz1);
}
CView::OnLButtonUp(nFlags, point);
}