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SCRIB3.PAK
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SCRIBDOC.CPP
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C/C++ Source or Header
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1997-05-06
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// ScribDoc.cpp : implementation of the CScribbleDoc 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 "PenDlg.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CScribbleDoc
IMPLEMENT_DYNCREATE(CScribbleDoc, CDocument)
BEGIN_MESSAGE_MAP(CScribbleDoc, CDocument)
//{{AFX_MSG_MAP(CScribbleDoc)
ON_COMMAND(ID_EDIT_CLEAR_ALL, OnEditClearAll)
ON_COMMAND(ID_PEN_THICK_OR_THIN, OnPenThickOrThin)
ON_UPDATE_COMMAND_UI(ID_EDIT_CLEAR_ALL, OnUpdateEditClearAll)
ON_UPDATE_COMMAND_UI(ID_PEN_THICK_OR_THIN, OnUpdatePenThickOrThin)
ON_COMMAND(ID_PEN_WIDTHS, OnPenWidths)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CScribbleDoc construction/destruction
CScribbleDoc::CScribbleDoc()
{
// TODO: add one-time construction code here
}
CScribbleDoc::~CScribbleDoc()
{
}
BOOL CScribbleDoc::OnNewDocument()
{
if (!CDocument::OnNewDocument())
return FALSE;
InitDocument();
return TRUE;
}
/////////////////////////////////////////////////////////////////////////////
// CScribbleDoc serialization
void CScribbleDoc::Serialize(CArchive& ar)
{
if (ar.IsStoring())
{
}
else
{
}
m_strokeList.Serialize(ar);
}
/////////////////////////////////////////////////////////////////////////////
// CScribbleDoc diagnostics
#ifdef _DEBUG
void CScribbleDoc::AssertValid() const
{
CDocument::AssertValid();
}
void CScribbleDoc::Dump(CDumpContext& dc) const
{
CDocument::Dump(dc);
}
#endif //_DEBUG
/////////////////////////////////////////////////////////////////////////////
// CScribbleDoc commands
BOOL CScribbleDoc::OnOpenDocument(LPCTSTR lpszPathName)
{
if (!CDocument::OnOpenDocument(lpszPathName))
return FALSE;
InitDocument();
return TRUE;
}
void CScribbleDoc::DeleteContents()
{
while (!m_strokeList.IsEmpty())
{
delete m_strokeList.RemoveHead();
}
CDocument::DeleteContents();
}
void CScribbleDoc::InitDocument()
{
m_bThickPen = FALSE;
m_nThinWidth = 2; // default thin pen is 2 pixels wide
m_nThickWidth = 5; // default thick pen is 5 pixels wide
ReplacePen(); // initialize pen according to current width
}
CStroke* CScribbleDoc::NewStroke()
{
CStroke* pStrokeItem = new CStroke(m_nPenWidth);
m_strokeList.AddTail(pStrokeItem);
SetModifiedFlag(); // Mark the document as having been modified, for
// purposes of confirming File Close.
return pStrokeItem;
}
/////////////////////////////////////////////////////////////////////////////
// CStroke
IMPLEMENT_SERIAL(CStroke, CObject, 1)
CStroke::CStroke()
{
// This empty constructor should be used by serialization only
}
CStroke::CStroke(UINT nPenWidth)
{
m_nPenWidth = nPenWidth;
}
void CStroke::Serialize(CArchive& ar)
{
if (ar.IsStoring())
{
ar << (WORD)m_nPenWidth;
m_pointArray.Serialize(ar);
}
else
{
WORD w;
ar >> w;
m_nPenWidth = w;
m_pointArray.Serialize(ar);
}
}
BOOL CStroke::DrawStroke(CDC* pDC)
{
CPen penStroke;
if (!penStroke.CreatePen(PS_SOLID, m_nPenWidth, RGB(0,0,0)))
return FALSE;
CPen* pOldPen = pDC->SelectObject(&penStroke);
pDC->MoveTo(m_pointArray[0]);
for (int i=1; i < m_pointArray.GetSize(); i++)
{
pDC->LineTo(m_pointArray[i]);
}
pDC->SelectObject(pOldPen);
return TRUE;
}
void CScribbleDoc::OnEditClearAll()
{
DeleteContents();
SetModifiedFlag(); // Mark the document as having been modified, for
// purposes of confirming File Close.
UpdateAllViews(NULL);
}
void CScribbleDoc::OnPenThickOrThin()
{
// Toggle the state of the pen between thin or thick.
m_bThickPen = !m_bThickPen;
// Change the current pen to reflect the new user-specified width.
ReplacePen();
}
void CScribbleDoc::ReplacePen()
{
m_nPenWidth = m_bThickPen? m_nThickWidth : m_nThinWidth;
// Change the current pen to reflect the new user-specified width.
m_penCur.DeleteObject();
m_penCur.CreatePen(PS_SOLID, m_nPenWidth, RGB(0,0,0)); // solid black
}
void CScribbleDoc::OnUpdateEditClearAll(CCmdUI* pCmdUI)
{
// Enable the command user interface object (menu item or tool bar
// button) if the document is non-empty, i.e., has at least one stroke.
pCmdUI->Enable(!m_strokeList.IsEmpty());
}
void CScribbleDoc::OnUpdatePenThickOrThin(CCmdUI* pCmdUI)
{
// Add check mark to Draw Thick Line menu item, if the current
// pen width is "thick".
pCmdUI->SetCheck(m_bThickPen);
}
void CScribbleDoc::OnPenWidths()
{
CPenWidthsDlg dlg;
// Initialize dialog data
dlg.m_nThinWidth = m_nThinWidth;
dlg.m_nThickWidth = m_nThickWidth;
// Invoke the dialog box
if (dlg.DoModal() == IDOK)
{
// retrieve the dialog data
m_nThinWidth = dlg.m_nThinWidth;
m_nThickWidth = dlg.m_nThickWidth;
// Update the pen that is used by views when drawing new strokes,
// to reflect the new pen width definitions for "thick" and "thin".
ReplacePen();
}
}