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SCRIB3.PAK
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SCRIBVW.CPP
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C/C++ Source or Header
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1997-05-06
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5KB
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188 lines
// ScribVw.cpp : implementation of the CScribbleView class
//
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1995 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Microsoft Foundation Classes product.
#include "stdafx.h"
#include "Scribble.h"
#include "ScribDoc.h"
#include "ScribVw.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CScribbleView
IMPLEMENT_DYNCREATE(CScribbleView, CView)
BEGIN_MESSAGE_MAP(CScribbleView, CView)
//{{AFX_MSG_MAP(CScribbleView)
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()
/////////////////////////////////////////////////////////////////////////////
// CScribbleView construction/destruction
CScribbleView::CScribbleView()
{
// TODO: add construction code here
}
CScribbleView::~CScribbleView()
{
}
BOOL CScribbleView::PreCreateWindow(CREATESTRUCT& cs)
{
// TODO: Modify the Window class or styles here by modifying
// the CREATESTRUCT cs
return CView::PreCreateWindow(cs);
}
/////////////////////////////////////////////////////////////////////////////
// CScribbleView drawing
void CScribbleView::OnDraw(CDC* pDC)
{
CScribbleDoc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// The view delegates the drawing of individual strokes to
// CStroke::DrawStroke().
CTypedPtrList<CObList,CStroke*>& strokeList = pDoc->m_strokeList;
POSITION pos = strokeList.GetHeadPosition();
while (pos != NULL)
{
CStroke* pStroke = strokeList.GetNext(pos);
pStroke->DrawStroke(pDC);
}
}
/////////////////////////////////////////////////////////////////////////////
// CScribbleView printing
BOOL CScribbleView::OnPreparePrinting(CPrintInfo* pInfo)
{
// default preparation
return DoPreparePrinting(pInfo);
}
void CScribbleView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add extra initialization before printing
}
void CScribbleView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
// TODO: add cleanup after printing
}
/////////////////////////////////////////////////////////////////////////////
// CScribbleView diagnostics
#ifdef _DEBUG
void CScribbleView::AssertValid() const
{
CView::AssertValid();
}
void CScribbleView::Dump(CDumpContext& dc) const
{
CView::Dump(dc);
}
CScribbleDoc* CScribbleView::GetDocument() // non-debug version is inline
{
ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CScribbleDoc)));
return (CScribbleDoc*)m_pDocument;
}
#endif //_DEBUG
/////////////////////////////////////////////////////////////////////////////
// CScribbleView message handlers
void CScribbleView::OnLButtonDown(UINT, CPoint point)
{
// Pressing the mouse button in the view window starts a new stroke
m_pStrokeCur = GetDocument()->NewStroke();
// Add first point to the new stroke
m_pStrokeCur->m_pointArray.Add(point);
SetCapture(); // Capture the mouse until button up.
m_ptPrev = point; // Serves as the MoveTo() anchor point for the
// LineTo() the next point, as the user drags the
// mouse.
return;
}
void CScribbleView::OnLButtonUp(UINT, CPoint point)
{
// Mouse button up is interesting in the Scribble application
// only if the user is currently drawing a new stroke by dragging
// the captured mouse.
if (GetCapture() != this)
return; // If this window (view) didn't capture the mouse,
// then the user isn't drawing in this window.
CScribbleDoc* pDoc = GetDocument();
CClientDC dc(this);
CPen* pOldPen = dc.SelectObject(pDoc->GetCurrentPen());
dc.MoveTo(m_ptPrev);
dc.LineTo(point);
dc.SelectObject(pOldPen);
m_pStrokeCur->m_pointArray.Add(point);
ReleaseCapture(); // Release the mouse capture established at
// the beginning of the mouse drag.
return;
}
void CScribbleView::OnMouseMove(UINT, CPoint point)
{
// Mouse movement is interesting in the Scribble application
// only if the user is currently drawing a new stroke by dragging
// the captured mouse.
if (GetCapture() != this)
return; // If this window (view) didn't capture the mouse,
// then the user isn't drawing in this window.
CClientDC dc(this);
m_pStrokeCur->m_pointArray.Add(point);
// Draw a line from the previous detected point in the mouse
// drag to the current point.
CPen* pOldPen = dc.SelectObject(GetDocument()->GetCurrentPen());
dc.MoveTo(m_ptPrev);
dc.LineTo(point);
dc.SelectObject(pOldPen);
m_ptPrev = point;
return;
}