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Файл:Варианты заданий и материалы к лабораторным / TaskOOT / Lab2 / Sketcher02 / SketcherView
.cpp// SketcherView.cpp : implementation of the CSketcherView class
//
#include "stdafx.h"
#include "Sketcher.h"
#include "Elements.h"
#include "SketcherDoc.h"
#include "SketcherView.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CSketcherView
IMPLEMENT_DYNCREATE(CSketcherView, CView)
BEGIN_MESSAGE_MAP(CSketcherView, CView)
//{{AFX_MSG_MAP(CSketcherView)
ON_WM_LBUTTONDOWN()
ON_WM_LBUTTONUP()
ON_WM_MOUSEMOVE()
//}}AFX_MSG_MAP
// Standard printing commands
ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CSketcherView construction/destruction
CSketcherView::CSketcherView()
{
m_FirstPoint = CPoint(0,0); // Set 1st recorded point to 0,0
m_SecondPoint = CPoint(0,0); // Set 2nd recorded point to 0,0
m_pTempElement = 0; // Set temporary element pointer to 0
}
CSketcherView::~CSketcherView()
{
}
BOOL CSketcherView::PreCreateWindow(CREATESTRUCT& cs)
{
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs
return CView::PreCreateWindow(cs);
}
/////////////////////////////////////////////////////////////////////////////
// CSketcherView drawing
void CSketcherView::OnDraw(CDC* pDC)
{
CSketcherDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here
}
/////////////////////////////////////////////////////////////////////////////
// CSketcherView printing
BOOL CSketcherView::OnPreparePrinting(CPrintInfo* pInfo)
{
// default preparation
return DoPreparePrinting(pInfo);
}
void CSketcherView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add extra initialization before printing
}
void CSketcherView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add cleanup after printing
}
/////////////////////////////////////////////////////////////////////////////
// CSketcherView diagnostics
#ifdef _DEBUG
void CSketcherView::AssertValid() const
{
CView::AssertValid();
}
void CSketcherView::Dump(CDumpContext& dc) const
{
CView::Dump(dc);
}
CSketcherDoc* CSketcherView::GetDocument() // non-debug version is inline
{
ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CSketcherDoc)));
return (CSketcherDoc*)m_pDocument;
}
#endif //_DEBUG
/////////////////////////////////////////////////////////////////////////////
// CSketcherView message handlers
void CSketcherView::OnLButtonDown(UINT nFlags, CPoint point)
{
m_FirstPoint = point; // Record the cursor position
SetCapture(); // Capture subsequent mouse messages
CView::OnLButtonDown(nFlags, point);
}
void CSketcherView::OnLButtonUp(UINT nFlags, CPoint point)
{
if(this == GetCapture())
ReleaseCapture(); // Stop capturing mouse messages
// Make sure there is an element
if(m_pTempElement)
{
// Call a document class function to store the element
// pointed to by m_pTempElement in the document object
delete m_pTempElement; // This code is temporary
m_pTempElement = 0; // Reset the element pointer
}
CView::OnLButtonUp(nFlags, point);
}
void CSketcherView::OnMouseMove(UINT nFlags, CPoint point)
{
// Define a Device Context object for the view
CClientDC aDC(this);
aDC.SetROP2(R2_NOTXORPEN); // Set the drawing mode
if((nFlags & MK_LBUTTON) && (this == GetCapture()))
{
m_SecondPoint = point; // Save the current cursor position
if(m_pTempElement)
{
// Redraw the old element so it disappears from the view
m_pTempElement->Draw(&aDC);
delete m_pTempElement; // Delete the old element
m_pTempElement = 0; // Reset the pointer to 0
}
// Create a temporary element of the type and color that
// is recorded in the document object, and draw it
m_pTempElement = CreateElement(); // Create a new element
m_pTempElement->Draw(&aDC); // Draw the element
}
CView::OnMouseMove(nFlags, point);
}
CElement* CSketcherView::CreateElement()
{
// 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());
case LINE:
return new CLine(m_FirstPoint, m_SecondPoint, pDoc->GetElementColor());
default:
// Something's gone wrong
AfxMessageBox("Bad Element code", MB_OK);
AfxAbort();
return NULL;
}
}
Соседние файлы в папке Sketcher02