www.pudn.com > 32位 DIB 图形类.zip > View.cpp

#include "stdafx.h" 
#include "app.h" 
#include "Doc.h" 
#include "View.h" 
#include "mainfrm.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
 
IMPLEMENT_DYNCREATE(CDibtestView, CScrollView) 
 
BEGIN_MESSAGE_MAP(CDibtestView, CScrollView) 
	//{{AFX_MSG_MAP(CDibtestView) 
	ON_COMMAND(ID_VIEW_NORMAL, OnViewNormal) 
	ON_UPDATE_COMMAND_UI(ID_VIEW_NORMAL, OnUpdateViewNormal) 
	ON_MESSAGE(WM_DOREALIZE, OnDoRealize) 
	ON_WM_CHAR() 
	ON_WM_LBUTTONDOWN() 
	ON_WM_RBUTTONDOWN() 
	ON_WM_SETCURSOR() 
	ON_COMMAND(ID_SELECT_ALL, OnSelectAll) 
	ON_WM_ERASEBKGND() 
	//}}AFX_MSG_MAP 
	ON_COMMAND(ID_FILE_PRINT, CScrollView::OnFilePrint) 
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CScrollView::OnFilePrint) 
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CScrollView::OnFilePrintPreview) 
  ON_COMMAND_RANGE(ID_ZOOMIN2, ID_ZOOMIN16, OnZoomin) 
  ON_UPDATE_COMMAND_UI_RANGE(ID_ZOOMIN2, ID_ZOOMIN16, OnUpdateZoomin) 
  ON_COMMAND_RANGE(ID_ZOOMOUT2, ID_ZOOMOUT16, OnZoomout) 
  ON_UPDATE_COMMAND_UI_RANGE(ID_ZOOMOUT2, ID_ZOOMOUT16, OnUpdateZoomout) 
END_MESSAGE_MAP() 
 
CDibtestView::CDibtestView() 
{ 
  m_bZoomIn = TRUE; 
  m_nZoomIn = 1; 
  m_nZoomOut = 1; 
 
  m_hMagnify = AfxGetApp()->LoadCursor(IDC_MAGNIFY); 
  m_hDropper = AfxGetApp()->LoadCursor(IDC_DROPPER); 
  m_hRectangleSelection = AfxGetApp()->LoadCursor(IDC_RECTANGLE_SELECTION); 
} 
 
CDibtestView::~CDibtestView() 
{ 
} 
 
BOOL CDibtestView::PreCreateWindow(CREATESTRUCT& cs) 
{ 
	return CScrollView::PreCreateWindow(cs); 
} 
 
void CDibtestView::OnDraw(CDC* pDC) 
{ 
	CDibtestDoc* pDoc = GetDocument(); 
	ASSERT_VALID(pDoc); 
 
  CSize size = GetTotalSize(); 
  CRect rect(0, 0, size.cx, size.cy); 
  GetDocument()->m_Dib.Draw(*pDC, &rect); 
  DrawSelectionRect(pDC); 
} 
 
 
void CDibtestView::DrawSelectionRect(CDC* pDC) 
{ 
  CRectTracker RectTracker; 
  RectTracker.m_nStyle = CRectTracker::dottedLine; 
  RectTracker.m_rect = GetDocument()->m_Dib.GetWorkingArea()->BoundingRectangle(); 
  if (m_bZoomIn) 
  { 
    RectTracker.m_rect.top *= m_nZoomIn; 
    RectTracker.m_rect.bottom *= m_nZoomIn; 
    RectTracker.m_rect.left *= m_nZoomIn; 
    RectTracker.m_rect.right *= m_nZoomIn; 
  } 
  else 
  { 
    RectTracker.m_rect.top /= m_nZoomOut; 
    RectTracker.m_rect.bottom /= m_nZoomOut; 
    RectTracker.m_rect.left /= m_nZoomOut; 
    RectTracker.m_rect.right /= m_nZoomOut; 
  } 
 
  RectTracker.Draw(pDC); 
} 
 
 
BOOL CDibtestView::OnPreparePrinting(CPrintInfo* pInfo) 
{ 
  pInfo->SetMaxPage(1); 
	return DoPreparePrinting(pInfo); 
} 
 
void CDibtestView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) 
{ 
} 
 
void CDibtestView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/) 
{ 
} 
 
#ifdef _DEBUG 
void CDibtestView::AssertValid() const 
{ 
	CScrollView::AssertValid(); 
} 
 
void CDibtestView::Dump(CDumpContext& dc) const 
{ 
	CScrollView::Dump(dc); 
} 
 
CDibtestDoc* CDibtestView::GetDocument() // non-debug version is inline 
{ 
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CDibtestDoc))); 
	return (CDibtestDoc*)m_pDocument; 
} 
#endif //_DEBUG 
 
LRESULT CDibtestView::OnDoRealize(WPARAM wParam, LPARAM) 
{ 
	ASSERT(wParam != NULL); 
	CDibtestDoc* pDoc = GetDocument(); 
	if (pDoc->m_Dib.GetHDIB() == NULL) 
		return 0L;  // must be a new document 
 
	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 pal; 
  pal.Attach(pDoc->m_Dib.GetHPALLETTE()); 
	CPalette* oldPalette = appDC.SelectPalette(&pal, ((HWND)wParam) != m_hWnd); 
	if (oldPalette != NULL) 
	{ 
		UINT nColorsChanged = appDC.RealizePalette(); 
		if (nColorsChanged > 0) 
			pDoc->UpdateAllViews(NULL); 
		appDC.SelectPalette(oldPalette, TRUE); 
	} 
  pal.Detach(); 
 
	return 0L; 
} 
 
 
void CDibtestView::OnPrint(CDC* pDC, CPrintInfo* pInfo)  
{ 
  GetDocument()->m_Dib.Draw(*pDC, &pInfo->m_rectDraw); 
} 
 
void CDibtestView::OnZoomin(UINT nID)  
{ 
  m_bZoomIn = TRUE; 
  m_nZoomIn = (nID - ID_ZOOMIN2) + 2; 
  CSize size(GetDocument()->m_Dib.Size()); 
  size.cx *= m_nZoomIn; 
  size.cy *= m_nZoomIn; 
  SetScrollSizes(MM_TEXT, size); 
  Invalidate(); 
} 
 
void CDibtestView::OnUpdateZoomin(CCmdUI* pCmdUI)  
{ 
  if (m_bZoomIn) 
	  pCmdUI->SetCheck((pCmdUI->m_nID - ID_ZOOMIN2+2) == (UINT) m_nZoomIn); 
  else 
	  pCmdUI->SetCheck(FALSE); 
} 
 
void CDibtestView::OnZoomout(UINT nID)  
{ 
  m_bZoomIn = FALSE; 
  m_nZoomOut = (nID - ID_ZOOMOUT2) + 2; 
  CSize size(GetDocument()->m_Dib.Size()); 
  size.cx /= m_nZoomOut; 
  size.cy /= m_nZoomOut; 
  SetScrollSizes(MM_TEXT, size); 
  Invalidate(); 
} 
 
void CDibtestView::OnUpdateZoomout(CCmdUI* pCmdUI)  
{ 
  if (!m_bZoomIn) 
	  pCmdUI->SetCheck((pCmdUI->m_nID - ID_ZOOMOUT2+2) == (UINT) m_nZoomOut); 
  else 
	  pCmdUI->SetCheck(FALSE); 
} 
 
void CDibtestView::OnViewNormal()  
{ 
  m_bZoomIn = FALSE; 
  m_nZoomOut = 1; 
  m_nZoomIn = 1; 
  SetScrollSizes(MM_TEXT, GetDocument()->m_Dib.Size()); 
  Invalidate(); 
} 
 
void CDibtestView::OnUpdateViewNormal(CCmdUI* pCmdUI)  
{ 
	pCmdUI->SetCheck((m_nZoomIn == 1) && (m_nZoomOut == 1)); 
} 
 
void CDibtestView::OnActivateView(BOOL bActivate, CView* pActivateView, CView* pDeactiveView)  
{ 
	CScrollView::OnActivateView(bActivate, pActivateView, pDeactiveView); 
 
	if (bActivate) 
	{ 
    GetMainFrame()->m_HistogramBar.Invalidate(); 
		ASSERT(pActivateView == this); 
		OnDoRealize((WPARAM)m_hWnd, 0);   // same as SendMessage(WM_DOREALIZE); 
	} 
} 
 
void CDibtestView::OnInitialUpdate()  
{ 
	CScrollView::OnInitialUpdate(); 
	SetScrollSizes(MM_TEXT, GetDocument()->m_Dib.Size()); 
} 
 
void CDibtestView::OnUpdate(CView* /*pSender*/, LPARAM /*lHint*/, CObject* /*pHint*/)  
{ 
  CSize size(GetDocument()->m_Dib.Size()); 
  if (m_bZoomIn) 
  { 
    size.cx *= m_nZoomIn; 
    size.cy *= m_nZoomIn; 
  } 
  else 
  { 
    size.cx /= m_nZoomOut; 
    size.cy /= m_nZoomOut; 
  } 
  SetScrollSizes(MM_TEXT, size); 
  Invalidate(); 
} 
 
BOOL CDibtestView::OnEraseBkgnd(CDC* pDC)  
{ 
  //return CScrollView::OnEraseBkgnd(pDC); 
  CBrush br; 
  br.CreateHatchBrush(HS_DIAGCROSS, RGB(0, 0, 0)); 
  FillOutsideRect(pDC, &br); 
  return TRUE; 
} 
 
void CDibtestView::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags)  
{ 
	if (nChar == VK_ESCAPE) 
	{ 
		CFrameWnd* pFrame = (CFrameWnd*) AfxGetMainWnd(); 
	  pFrame->PostMessage(WM_COMMAND, ID_VIEW_FULLSCREEN); 
	} 
  CView::OnChar(nChar, nRepCnt, nFlags); 
} 
 
 
BOOL CDibtestView::GetColorAndPositionAtCursor(COLORREF& color, int& x, int& y)  
{ 
  POINT point; 
  if (!GetCursorPos(&point)) 
    return FALSE; 
  ScreenToClient(&point); 
 
  CSize size = GetTotalSize(); 
  CRect rect(0, 0, size.cx, size.cy); 
  if (!rect.PtInRect(point)) 
    return FALSE; 
 
  CClientDC dc(this); 
  color = dc.GetPixel(point.x, point.y); 
 
  x = point.x; 
  y = point.y; 
 
  if (m_bZoomIn) 
  { 
    x /= m_nZoomIn; 
    y /= m_nZoomIn; 
  } 
  else 
  { 
    x *= m_nZoomOut; 
    y *= m_nZoomOut; 
  } 
 
  return TRUE; 
} 
 
 
void CDibtestView::OnLButtonDown(UINT /*nFlags*/, CPoint point)  
{ 
  if (GetMainFrame()->m_ToolOption == Magnify) 
  { 
    if (m_nZoomOut > 2 && m_nZoomOut <= 16) 
      OnZoomout(ID_ZOOMOUT2+m_nZoomOut-3); 
    else if (m_nZoomOut == 2) 
      OnViewNormal(); 
    else if (m_nZoomOut == 1 && m_nZoomIn == 1) 
      OnZoomin(ID_ZOOMIN2); 
    else if (m_nZoomIn < 16) 
      OnZoomin(ID_ZOOMIN2+m_nZoomIn-1); 
  } 
  else if (GetMainFrame()->m_ToolOption == ColorDropper) 
  { 
    int x; 
    int y; 
    COLORREF color; 
    if (GetColorAndPositionAtCursor(color, x, y))  
    { 
      GetMainFrame()->m_PaletteBar.m_ForeColor = color; 
      GetMainFrame()->m_PaletteBar.Invalidate(); 
    } 
  } 
  else if (GetMainFrame()->m_ToolOption == RectangleSelection) 
  { 
    Invalidate(); 
    CRectTracker RectTracker; 
    if (RectTracker.TrackRubberBand(this, point)) 
    { 
      CWaitCursor wait; 
      //m_bHaveSelectionRect = TRUE; 
      CDibtestDoc* pDoc = GetDocument(); 
 
      //ensure the rectangle is the right way up 
      if (RectTracker.m_rect.left > RectTracker.m_rect.right) 
      { 
        int t = RectTracker.m_rect.left; 
        RectTracker.m_rect.left = RectTracker.m_rect.right; 
        RectTracker.m_rect.right = t; 
      } 
 
      //ensure the rectangle is the right way up 
      if (RectTracker.m_rect.top > RectTracker.m_rect.bottom) 
      { 
        int t = RectTracker.m_rect.top; 
        RectTracker.m_rect.top = RectTracker.m_rect.bottom; 
        RectTracker.m_rect.bottom = t; 
      } 
 
      //clip the selection to the maximum size of the window 
      CSize size(GetTotalSize()); 
      if (RectTracker.m_rect.left < 0) 
        RectTracker.m_rect.left = 0; 
      if (RectTracker.m_rect.top < 0) 
        RectTracker.m_rect.top = 0; 
      if (RectTracker.m_rect.right > size.cx) 
        RectTracker.m_rect.right = size.cx; 
      if (RectTracker.m_rect.bottom > size.cy) 
        RectTracker.m_rect.bottom = size.cy; 
 
      if (m_bZoomIn) 
      { 
        RectTracker.m_rect.top /= m_nZoomIn; 
        RectTracker.m_rect.bottom /= m_nZoomIn; 
        RectTracker.m_rect.left /= m_nZoomIn; 
        RectTracker.m_rect.right /= m_nZoomIn; 
      } 
      else 
      { 
        RectTracker.m_rect.top *= m_nZoomOut; 
        RectTracker.m_rect.bottom *= m_nZoomOut; 
        RectTracker.m_rect.left *= m_nZoomOut; 
        RectTracker.m_rect.right *= m_nZoomOut; 
      } 
 
      pDoc->m_Dib.SetWorkingArea(new CRectWorkingArea(RectTracker.m_rect)); 
      pDoc->UpdateHistogramData(); 
    } 
    else 
    { 
      //m_bHaveSelectionRect = FALSE; 
      MessageBeep(0); 
    } 
    Invalidate(FALSE); 
  } 
} 
 
 
void CDibtestView::OnRButtonDown(UINT /*nFlags*/, CPoint /*point*/)  
{ 
  if (GetMainFrame()->m_ToolOption == Magnify) 
  { 
    if (m_nZoomIn > 2 && m_nZoomIn <= 16) 
      OnZoomin(ID_ZOOMIN2+m_nZoomIn-3); 
    else if (m_nZoomIn == 2) 
      OnViewNormal(); 
    else if (m_nZoomOut == 1 && m_nZoomIn == 1) 
      OnZoomout(ID_ZOOMOUT2); 
    else if (m_nZoomOut < 16) 
      OnZoomout(ID_ZOOMOUT2+m_nZoomOut-1); 
  } 
  else if (GetMainFrame()->m_ToolOption == ColorDropper) 
  { 
    int x; 
    int y; 
    COLORREF color; 
    if (GetColorAndPositionAtCursor(color, x, y))  
    { 
      GetMainFrame()->m_PaletteBar.m_BackColor = color; 
      GetMainFrame()->m_PaletteBar.Invalidate(); 
    } 
  } 
} 
 
 
BOOL CDibtestView::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)  
{ 
  m_hMagnify = AfxGetApp()->LoadCursor(IDC_MAGNIFY); 
  m_hDropper = AfxGetApp()->LoadCursor(IDC_DROPPER); 
  m_hRectangleSelection = AfxGetApp()->LoadCursor(IDC_RECTANGLE_SELECTION); 
 
  BOOL bSuccess = TRUE; 
  if (GetMainFrame()->m_ToolOption == Magnify) 
    ::SetCursor(m_hMagnify); 
  else if (GetMainFrame()->m_ToolOption == RectangleSelection) 
    ::SetCursor(m_hRectangleSelection); 
  else if (GetMainFrame()->m_ToolOption == ColorDropper) 
    ::SetCursor(m_hDropper); 
  else 
    bSuccess = CScrollView::OnSetCursor(pWnd, nHitTest, message); 
 
  return bSuccess; 
} 
 
 
void CDibtestView::OnSelectAll()  
{ 
  CWaitCursor wait; 
  CDibtestDoc* pDoc = GetDocument(); 
  CSize size(pDoc->m_Dib.Size()); 
  pDoc->m_Dib.SetWorkingArea(new CRectWorkingArea(pDoc->m_Dib.Rect())); 
  pDoc->UpdateHistogramData(); 
  Invalidate(FALSE); 
}