// dibview.cpp : implementation of the CDibView 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 "diblook.h"

#include "dibdoc.h"
#include "dibview.h"
#include "dibapi.h"
#include "mainfrm.h"

#ifdef _DEBUG
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CDibView

IMPLEMENT_DYNCREATE(CDibView, CScrollView)

BEGIN_MESSAGE_MAP(CDibView, CScrollView)
	//{{AFX_MSG_MAP(CDibView)
	ON_COMMAND(ID_EDIT_COPY, OnEditCopy)
	ON_UPDATE_COMMAND_UI(ID_EDIT_COPY, OnUpdateEditCopy)
	ON_COMMAND(ID_EDIT_PASTE, OnEditPaste)
	ON_UPDATE_COMMAND_UI(ID_EDIT_PASTE, OnUpdateEditPaste)
	ON_MESSAGE(WM_DOREALIZE, OnDoRealize)
	//}}AFX_MSG_MAP

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

/////////////////////////////////////////////////////////////////////////////
// CDibView construction/destruction

CDibView::CDibView()
{
}

CDibView::~CDibView()
{
}

/////////////////////////////////////////////////////////////////////////////
// CDibView drawing

void CDibView::OnDraw(CDC* pDC)
{
	CDibDoc* pDoc = GetDocument();

	HDIB hDIB = pDoc->GetHDIB();
	if (hDIB != NULL)
	{
		LPSTR lpDIB = (LPSTR) ::GlobalLock((HGLOBAL) hDIB);
		int cxDIB = (int) ::DIBWidth(lpDIB);         // Size of DIB - x
		int cyDIB = (int) ::DIBHeight(lpDIB);        // Size of DIB - y
		::GlobalUnlock((HGLOBAL) hDIB);
		CRect rcDIB;
		rcDIB.top = rcDIB.left = 0;
		rcDIB.right = cxDIB;
		rcDIB.bottom = cyDIB;
		CRect rcDest;
		if (pDC->IsPrinting())   // printer DC
		{
			// get size of printer page (in pixels)
			int cxPage = pDC->GetDeviceCaps(HORZRES);
			int cyPage = pDC->GetDeviceCaps(VERTRES);
			// get printer pixels per inch
			int cxInch = pDC->GetDeviceCaps(LOGPIXELSX);
			int cyInch = pDC->GetDeviceCaps(LOGPIXELSY);

			//
			// Best Fit case -- create a rectangle which preserves
			// the DIB's aspect ratio, and fills the page horizontally.
			//
			// The formula in the "->bottom" field below calculates the Y
			// position of the printed bitmap, based on the size of the
			// bitmap, the width of the page, and the relative size of
			// a printed pixel (cyInch / cxInch).
			//
			rcDest.top = rcDest.left = 0;
			rcDest.bottom = (int)(((double)cyDIB * cxPage * cyInch)
					/ ((double)cxDIB * cxInch));
			rcDest.right = cxPage;
		}
		else   // not printer DC
		{
			rcDest = rcDIB;
		}
		::PaintDIB(pDC->m_hDC, &rcDest, pDoc->GetHDIB(),
			&rcDIB, pDoc->GetDocPalette());
	}
}

/////////////////////////////////////////////////////////////////////////////
// CDibView printing

BOOL CDibView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

/////////////////////////////////////////////////////////////////////////////
// CDibView commands


LRESULT CDibView::OnDoRealize(WPARAM wParam, LPARAM)
{
	ASSERT(wParam != NULL);
	CDibDoc* pDoc = GetDocument();
	if (pDoc->GetHDIB() == NULL)
		return 0L;  // must be a new document

	CPalette* pPal = pDoc->GetDocPalette();
	if (pPal != NULL)
	{
		CMainFrame* pAppFrame = (CMainFrame*) AfxGetApp()->m_pMainWnd;
		ASSERT_KINDOF(CMainFrame, pAppFrame);

		CClientDC appDC(pAppFrame);
		// All views but one should be a background palette.
		// wParam contains a handle to the active view, so the SelectPalette
		// bForceBackground flag is FALSE only if wParam == m_hWnd (this view)
		CPalette* oldPalette = appDC.SelectPalette(pPal, ((HWND)wParam) != m_hWnd);

		if (oldPalette != NULL)
		{
			UINT nColorsChanged = appDC.RealizePalette();
			if (nColorsChanged > 0)
				pDoc->UpdateAllViews(NULL);
			appDC.SelectPalette(oldPalette, TRUE);
		}
		else
		{
			TRACE0("\tSelectPalette failed in CDibView::OnPaletteChanged\n");
		}
	}

	return 0L;
}

void CDibView::OnInitialUpdate()
{
	CScrollView::OnInitialUpdate();
	ASSERT(GetDocument() != NULL);

	SetScrollSizes(MM_TEXT, GetDocument()->GetDocSize());
}


void CDibView::OnActivateView(BOOL bActivate, CView* pActivateView,
					CView* pDeactiveView)
{
	CScrollView::OnActivateView(bActivate, pActivateView, pDeactiveView);

	if (bActivate)
	{
		ASSERT(pActivateView == this);
		OnDoRealize((WPARAM)m_hWnd, 0);   // same as SendMessage(WM_DOREALIZE);
	}
}

void CDibView::OnEditCopy()
{
	CDibDoc* pDoc = GetDocument();
	// Clean clipboard of contents, and copy the DIB.

	if (OpenClipboard())
	{
		BeginWaitCursor();
		EmptyClipboard();
		SetClipboardData (CF_DIB, CopyHandle((HANDLE) pDoc->GetHDIB()) );
		CloseClipboard();
		EndWaitCursor();
	}
}



void CDibView::OnUpdateEditCopy(CCmdUI* pCmdUI)
{
	pCmdUI->Enable(GetDocument()->GetHDIB() != NULL);
}


void CDibView::OnEditPaste()
{
	HDIB hNewDIB = NULL;

	if (OpenClipboard())
	{
		BeginWaitCursor();

		hNewDIB = (HDIB) CopyHandle(::GetClipboardData(CF_DIB));

		CloseClipboard();

		if (hNewDIB != NULL)
		{
			CDibDoc* pDoc = GetDocument();
			pDoc->ReplaceHDIB(hNewDIB); // and free the old DIB
			pDoc->InitDIBData();    // set up new size & palette
			pDoc->SetModifiedFlag(TRUE);

			SetScrollSizes(MM_TEXT, pDoc->GetDocSize());
			OnDoRealize((WPARAM)m_hWnd,0);  // realize the new palette
			pDoc->UpdateAllViews(NULL);
		}
		EndWaitCursor();
	}
}


void CDibView::OnUpdateEditPaste(CCmdUI* pCmdUI)
{
	pCmdUI->Enable(::IsClipboardFormatAvailable(CF_DIB));
}
