// scribvw.cpp : implementation of the CScribView class
//
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Microsoft Foundation Classes Reference and Microsoft
// QuickHelp and/or WinHelp 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
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CScribView

IMPLEMENT_DYNCREATE(CScribView, CScrollView)


BEGIN_MESSAGE_MAP(CScribView, CScrollView)
	//{{AFX_MSG_MAP(CScribView)
		// NOTE - the ClassWizard will add and remove mapping macros here.
		//    DO NOT EDIT what you see in these blocks of generated code !
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	ON_WM_MOUSEMOVE()
	ON_WM_SIZE()
	//}}AFX_MSG_MAP

	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CScribView construction/destruction

CScribView::CScribView()
{
	SetScrollSizes(MM_TEXT, CSize(0, 0));
}

CScribView::~CScribView()
{
}



/////////////////////////////////////////////////////////////////////////////
void CScribView::OnUpdate(CView*, LPARAM, CObject* pHint)
{
	// The document has informed this view that some data has changed.

	if (pHint != NULL)
	{
		if (pHint->IsKindOf(RUNTIME_CLASS(CStroke)))
		{
			// The hint is that a stroke as been added (or changed).
			// So, invalidate its rectangle.
			CStroke* pStroke = (CStroke*)pHint;
			CClientDC dc(this);
			OnPrepareDC(&dc);
			CRect rectInvalid = pStroke->GetBoundingRect();
			dc.LPtoDP(&rectInvalid);
			InvalidateRect(&rectInvalid);
			return;
		}
	}
	// We can't interpret the hint, so assume that anything might
	// have been updated.
	Invalidate(TRUE);
	return;
}

/////////////////////////////////////////////////////////////////////////////
//  A view's OnInitialUpdate() overrideable function is called immediately
//  after the frame window is created, and the view within the frame
//  window is attached to its document.  This provides the scroll view the
//  opportunity to set its size (m_totalSize) based on the document size.
void CScribView::OnInitialUpdate()
{
	SetScrollInfo();
}

void CScribView::SetScrollInfo()
{
	CClientDC dc(NULL);
	OnPrepareDC(&dc);
	CSize sizeDoc = GetDocument()->GetDocSize();
	dc.LPtoDP(&sizeDoc);
	SetScrollSizes(MM_TEXT, sizeDoc);
}

void CScribView::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo)
{
	CScribDoc* pDoc = GetDocument();
	CScrollView::OnPrepareDC(pDC, pInfo);

	pDC->SetMapMode(MM_ANISOTROPIC);
	CSize sizeDoc = pDoc->GetDocSize();
	sizeDoc.cy = -sizeDoc.cy;
	pDC->SetWindowExt(sizeDoc);

	CSize sizeNum, sizeDenom;
	pDoc->GetZoomFactor(&sizeNum, &sizeDenom);

	int xLogPixPerInch = pDC->GetDeviceCaps(LOGPIXELSX);
	int yLogPixPerInch = pDC->GetDeviceCaps(LOGPIXELSY);

	long xExt = (long)sizeDoc.cx * xLogPixPerInch * sizeNum.cx;
	xExt /= 100 * (long)sizeDenom.cx;
	long yExt = (long)sizeDoc.cy * yLogPixPerInch * sizeNum.cy;
	yExt /= 100 * (long)sizeDenom.cy;
	pDC->SetViewportExt((int)xExt, (int)-yExt);
}

/////////////////////////////////////////////////////////////////////////////
// CScribView drawing

void CScribView::OnDraw(CDC* pDC)
{
	CScribDoc* pDoc = GetDocument();


	// Get the invalidated rectangle of the view, or in the case
	// of printing, the clipping region of the printer dc.
	CRect rectClip;
	CRect rectStroke;
	pDC->GetClipBox(&rectClip);
	pDC->LPtoDP(&rectClip);

	// Note: CScrollView::OnPaint() will have already adjusted the
	// viewport origin before calling OnDraw(), to reflect the
	// currently scrolled position.

	// The view delegates the drawing of individual strokes to
	// CStroke::DrawStroke().
	for (POSITION pos = pDoc->GetFirstStrokePos(); pos != NULL; )
	{
		CStroke* pStroke = pDoc->GetNextStroke(pos);
		rectStroke = pStroke->GetBoundingRect();
		pDC->LPtoDP(&rectStroke);
		if (!rectStroke.IntersectRect(&rectStroke, &rectClip))
			continue;
		pStroke->DrawStroke(pDC);
	}
}

/////////////////////////////////////////////////////////////////////////////
// CScribView printing

BOOL CScribView::OnPreparePrinting(CPrintInfo* pInfo)
{
	pInfo->SetMaxPage(2);   // the document is two pages long:
							// the first page is the title page
							// the second is the drawing
	pInfo->m_nNumPreviewPages = 2;  // preview 2 pages at a time
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CScribView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CScribView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
void CScribView::OnPrint(CDC* pDC, CPrintInfo* pInfo)
{
	if (pInfo->m_nCurPage == 1)  // page no. 1 is the title page
	{
		PrintTitlePage(pDC, pInfo);
		return; // nothing else to print on page 1 but the page title
	}
	CString strHeader = GetDocument()->GetTitle();

	PrintPageHeader(pDC, pInfo, strHeader);
	// PrintPageHeader() subtracts out from the pInfo->m_rectDraw the
	// amount of the page used for the header.

	pDC->SetWindowOrg(pInfo->m_rectDraw.left,-pInfo->m_rectDraw.top);

	// Now print the rest of the page
	OnDraw(pDC);
}

/////////////////////////////////////////////////////////////////////////////
void CScribView::PrintTitlePage(CDC* pDC, CPrintInfo* pInfo)
{
	// Prepare a font size for displaying the file name
	LOGFONT logFont;
	memset(&logFont, 0, sizeof(LOGFONT));
	logFont.lfHeight = 75;  //  3/4th inch high in MM_LOENGLISH
							// (1/100th inch)
	CFont font;
	CFont* pOldFont = NULL;
	if (font.CreateFontIndirect(&logFont))
		pOldFont = pDC->SelectObject(&font);

	// Get the file name, to be displayed on title page
	CString strPageTitle = GetDocument()->GetTitle();

	// Display the file name 1 inch below top of the page,
	// centered horizontally
	pDC->SetTextAlign(TA_CENTER);
	pDC->TextOut(pInfo->m_rectDraw.right/2, -100, strPageTitle);

	if (pOldFont != NULL)
		pDC->SelectObject(pOldFont);
}

/////////////////////////////////////////////////////////////////////////////
void CScribView::PrintPageHeader(CDC* pDC, CPrintInfo* pInfo,
	CString& strHeader)
{
	// Print a page header consisting of the name of
	// the document and a horizontal line
	pDC->TextOut(0,-25, strHeader);  // 1/4 inch down

	// Draw a line across the page, below the header
	TEXTMETRIC textMetric;
	pDC->GetTextMetrics(&textMetric);
	int y = -35 - textMetric.tmHeight;          // line 1/10th inch below text
	pDC->MoveTo(0, y);                          // from left margin
	pDC->LineTo(pInfo->m_rectDraw.right, y);    // to right margin

	// Subtract out from the drawing rectange the space used by the header.
	y -= 25;    // space 1/4 inch below (top of) line
	pInfo->m_rectDraw.top += y;
}

/////////////////////////////////////////////////////////////////////////////
// CScribView diagnostics

#ifdef _DEBUG
void CScribView::AssertValid() const
{
	CScrollView::AssertValid();
}

void CScribView::Dump(CDumpContext& dc) const
{
	CScrollView::Dump(dc);
}

CScribDoc* CScribView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CScribDoc)));
	return (CScribDoc*) m_pDocument;
}

#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CScribView message handlers

void CScribView::OnLButtonDown(UINT, CPoint point)
{   // When the user presses the mouse button, she may be
	// starting a new stroke, or selecting or de-selecting a stroke.

	// CScrollView changes the viewport origin and mapping mode.
	// It's necessary to convert the point from device coordinates
	// to logical coordinates, such as are stored in the document.
	CClientDC dc(this);
	OnPrepareDC(&dc);
	dc.DPtoLP(&point);

	m_pStrokeCur = GetDocument()->NewStroke();
	m_pStrokeCur->AddPoint(point); // add first point to the new stroke

	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 CScribView::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.

	CScribDoc* pDoc = GetDocument();

	CClientDC dc(this);

	// CScrollView changes the viewport origin and mapping mode.
	// It's necessary to convert the point from device coordinates
	// to logical coordinates, such as are stored in the document.
	OnPrepareDC(&dc);  // set up mapping mode and viewport origin
	dc.DPtoLP(&point);

	CPen* pOldPen = dc.SelectObject(pDoc->GetCurrentPen());
	dc.MoveTo(m_ptPrev);
	dc.LineTo(point);
	dc.SelectObject(pOldPen);
	m_pStrokeCur->AddPoint(point);

	// Tell the stroke item that we're done adding points to it.
	// This is so it can finish computing its bounding rectangle.
	m_pStrokeCur->FinishStroke();

	// Tell the other views that this stroke has been added
	// so that they can invalidate this stroke's area in their
	// client area.
	pDoc->UpdateAllViews(this, 0L, m_pStrokeCur);

	ReleaseCapture();   // Release the mouse capture established at
						// the beginning of the mouse drag.
	pDoc->NotifyChanged();
	return;
}


/////////////////////////////////////////////////////////////////////////////
void CScribView::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);
	// CScrollView changes the viewport origin and mapping mode.
	// It's necessary to convert the point from device coordinates
	// to logical coordinates, such as are stored in the document.
	OnPrepareDC(&dc);
	dc.DPtoLP(&point);

	m_pStrokeCur->AddPoint(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;
}

void CScribView::OnSize(UINT nType, int cx, int cy)
{
	SetScrollInfo();    // insure that scroll info is up-to-date

	CScrollView::OnSize(nType, cx, cy);
}
