// ==========================================================================
// Class Implementation : COXZoomView
// ==========================================================================
// Source file : OXZoomView.cpp
// Version: 9.3
// This software along with its related components, documentation and files ("The Libraries")
// is � 1994-2007 The Code Project (1612916 Ontario Limited) and use of The Libraries is
// governed by a software license agreement ("Agreement"). Copies of the Agreement are
// available at The Code Project (www.codeproject.com), as part of the package you downloaded
// to obtain this file, or directly from our office. For a copy of the license governing
// this software, you may contact us at legalaffairs@codeproject.com, or by calling 416-849-8900.
// //////////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "OXZoomVw.h"
#include <limits.h>
#include <afxpriv.h>
#ifndef __OXMFCIMPL_H__
#if _MFC_VER >= 0x0700
#if _MFC_VER >= 1400
#include <afxtempl.h>
#endif
#include <..\src\mfc\afximpl.h>
#else
#include <..\src\afximpl.h>
#endif
#define __OXMFCIMPL_H__
#endif
#ifndef SPI_GETWHEELSCROLLLINES
#define SPI_GETWHEELSCROLLLINES 104
#endif
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif
#ifndef WIN32
#ifdef _DEBUG
#define UNUSED(x)
#else
#define UNUSED(x) x
#endif
#endif
/////////////////////////////////////////////////////////////////////////////
// COXZoomView
/////////////////////////////////////////////////////////////////////////////
// Definition of static members
#ifdef WIN32
AFX_DATA const SIZE COXZoomView::sizeDefault = {0,0};
#else
const SIZE AFXAPI_DATA COXZoomView::sizeDefault = {0,0};
#endif
// Data members -------------------------------------------------------------
// protected:
// CSize m_totalLog;
// --- total size in logical units (no rounding)
// CRect m_rectLog;
// --- bounding rectangle of document in logical units
// CSize m_totalDev;
// --- total size in device units, scaled
// CSize m_pageDev;
// --- per page scroll size in device units
// CSize m_lineDev;
// --- per line scroll size in device units
// CSize m_sizeDev;
// --- total size in device units, unscaled for MM_ANISOTROPIC
// BOOL m_bCenter;
// --- Center output if larger than total size
// BOOL m_bInsideUpdate;
// --- internal state for OnSize callback
// int m_nZoomLevel;
// --- percentage of zooming
// BOOL m_bAlignToBottom;
// --- align to bottom of window if it's bigger than necessary
// int m_nPagePercent;
// --- percentage of window to scroll in case of mouse click in a scroll-bar shaft
// int m_nLinePercent;
// --- percentage of window to scroll in case of mouse click in a scroll arrow
IMPLEMENT_DYNAMIC(COXZoomView, CView)
BEGIN_MESSAGE_MAP(COXZoomView, CView)
//{{AFX_MSG_MAP(COXZoomView)
ON_WM_SIZE()
ON_WM_HSCROLL()
ON_WM_VSCROLL()
ON_WM_MOUSEWHEEL()
ON_WM_CREATE()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
// Special mapping modes just for COXZoomView implementation
#define MM_NONE 0
// Member functions ---------------------------------------------------------
// public:
COXZoomView::COXZoomView() :
m_nMapMode(MM_NONE),
m_nZoomLevel(100), // 100%
m_align(ZV_TOPLEFT),
m_totalLog(0,0),
m_rectLog(0,0,0,0),
m_totalDev(0,0),
m_pageDev(0,0),
m_lineDev(0,0),
m_sizeDev(0,0),
m_nPagePercent(0),
m_nLinePercent(0),
m_bUseRelativeScrollSizes(FALSE),
m_bInsideUpdate(FALSE),
m_bCenter(FALSE),
m_bAlignToBottom(FALSE)
{
}
COXZoomView::~COXZoomView()
{
}
int COXZoomView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if(CView::OnCreate(lpCreateStruct)==-1)
return -1;
if(!Initialize())
{
TRACE(_T("COXZoomView::OnCreate: failed to initialize the object!\n"));
return -1;
}
return 0;
}
BOOL COXZoomView::Initialize()
{
BOOL bResult=FALSE;
#ifdef OXZOOMVIEW_USE_RULER
bResult=AttachRuler();
#else
bResult=TRUE;
#endif // OXZOOMVIEW_USE_RULER
return bResult;
}
void COXZoomView::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo)
{
ASSERT_VALID(pDC);
ASSERT(m_totalDev.cx >= 0 && m_totalDev.cx >= 0);
SetMapMode(pDC);
CPoint ptVpOrg(0, 0); // assume no shift for printing
if (!pDC->IsPrinting())
{
ASSERT(pDC->GetWindowOrg() == CPoint(0,0));
ScaleViewport(pDC);
// by default shift viewport origin in negative direction of scroll
ptVpOrg = -GetDeviceScrollPosition();
if (m_bCenter)
{
CRect rect;
GetClientRect(&rect);
// if client area is larger than total device size,
// override scroll positions to place origin such that
// output is centered in the window
if (m_totalDev.cx < rect.Width())
ptVpOrg.x = (rect.Width() - m_totalDev.cx) / 2;
if (m_totalDev.cy < rect.Height())
ptVpOrg.y = (rect.Height() - m_totalDev.cy) / 2;
}
else
{
// if no vertical SB, eventually align to bottom
if(m_bAlignToBottom)
{
CRect rect;
int cy;
GetClientRect(&rect);
cy = rect.Height() - m_totalDev.cy;
if(cy > 0)
ptVpOrg.y = cy;
}
}
// Set the logical origin, do it yourself when printing !!!
pDC->SetWindowOrg(m_rectLog.TopLeft());
}
pDC->SetViewportOrg(ptVpOrg);
CView::OnPrepareDC(pDC, pInfo); // For default Printing behavior
}
/////////////////////////////////////////////////////////////////////////////
// Set mode and scaling/scrolling sizes
void COXZoomView::SetDeviceScrollSizesRelative(int nMapMode, SIZE sizeTotal,
int nPagePercent, int nLinePercent)
{
// synthesize a rectangle from the size
CRect rectLog(CPoint(0,0), sizeTotal);
if(nMapMode != MM_TEXT)
rectLog.bottom = -rectLog.bottom;
// call overloaded function for real work
SetDeviceScrollSizesRelative(nMapMode, rectLog, nPagePercent, nLinePercent);
}
void COXZoomView::SetDeviceScrollSizesRelative(SIZE sizeDevice, const CRect& rectDoc,
int nPagePercent, int nLinePercent)
{
ASSERT(sizeDevice.cy > 0);
if(rectDoc.Height() < 0)
sizeDevice.cy = -sizeDevice.cy;
m_sizeDev = sizeDevice;
SetDeviceScrollSizesRelative(MM_ANISOTROPIC, rectDoc, nPagePercent, nLinePercent);
}
void COXZoomView::SetDeviceScrollSizesRelative(int nMapMode, const CRect& rectDoc,
int nPagePercent, int nLinePercent)
{
ASSERT(nLinePercent > 0);
ASSERT(nPagePercent >= nLinePercent);
ASSERT(nLinePercent <= 100);
ASSERT(nPagePercent <= 100);
m_bUseRelativeScrollSizes = TRUE;
m_nPagePercent = nPagePercent;
m_nLinePercent = nLinePercent;
m_rectLog = rectDoc;
m_totalLog.cx = m_rectLog.Width();
m_totalLog.cy = m_rectLog.Height();
if(m_totalLog.cy < 0)
m_totalLog.cy = -m_totalLog.cy;
ASSERT(nMapMode > 0);
ASSERT(nMapMode != MM_ISOTROPIC);
int nOldMapMode = m_nMapMode;
m_nMapMode = nMapMode;
//BLOCK: convert logical coordinate space to device coordinates
{
CWindowDC dc(NULL);
SetMapMode(&dc);
ScaleViewport(&dc);
m_totalDev = m_totalLog;
dc.LPtoDP((LPPOINT)&m_totalDev);
if (m_totalDev.cy < 0)
m_totalDev.cy = -m_totalDev.cy;
} // release DC here
// now adjust device specific sizes
ASSERT(m_totalDev.cx >= 0 && m_totalDev.cy >= 0);
if (m_hWnd != NULL)
{
// window has been created, invalidate now
UpdateBars();
if (nOldMapMode != m_nMapMode)
Invalidate(TRUE);
}
}
// maintained for backward compatibility
void COXZoomView::SetScrollSizes(int nMapMode, SIZE sizeTotal,
const SIZE& sizePage, const SIZE& sizeLine)
{
m_bUseRelativeScrollSizes = FALSE;
ASSERT(sizeTotal.cx >= 0 && sizeTotal.cy >= 0);
ASSERT(nMapMode > 0);
ASSERT(nMapMode != MM_ISOTROPIC && nMapMode != MM_ANISOTROPIC);
int nOldMapMode = m_nMapMode;
m_nMapMode = nMapMode;
m_totalLog = sizeTotal;
// synthesize a rectangle from the size
m_rectLog = CRect(CPoint(0,0), sizeTotal);
if(m_nMapMode != MM_TEXT)
m_rectLog.bottom = -m_rectLog.bottom;
//BLOCK: convert logical coordinate space to device coordinates
{
CWindowDC dc(NULL);
ASSERT(m_nMapMode > 0);
SetMapMode(&dc);
// leave page and line sizes unaffected from zooming
m_pageDev = sizePage;
dc.LPtoDP((LPPOINT)&m_pageDev);
m_lineDev = sizeLine;
dc.LPtoDP((LPPOINT)&m_lineDev);
// total size
ScaleViewport(&dc);
m_totalDev = m_totalLog;
dc.LPtoDP((LPPOINT)&m_totalDev);
if (m_totalDev.cy < 0)
m_totalDev.cy = -m_totalDev.cy;
if (m_pageDev.cy < 0)
m_pageDev.cy = -m_pageDev.cy;
if (m_lineDev.cy < 0)
m_lineDev.cy = -m_lineDev.cy;
} // release DC here
// now adjust device specific sizes
ASSERT(m_totalDev.cx >= 0 && m_totalDev.cy >= 0);
if (m_pageDev.cx == 0)
m_pageDev.cx = m_totalDev.cx / 10;
if (m_pageDev.cy == 0)
m_pageDev.cy = m_totalDev.cy / 10;
if (m_lineDev.cx == 0)
m_lineDev.cx = m_pageDev.cx / 10;
if (m_lineDev.cy == 0)
m_lineDev.cy = m_pageDev.cy / 10;
if (m_hWnd != NULL)
{
// window has been created, invalidate now
UpdateBars();
if (nOldMapMode != m_nMapMode)
Invalidate(TRUE);
}
}
// Zoom Ops
void COXZoomView::ZoomToWindow()
{
int nZoomLevel=GetZoomLevel();
{
CClientDC dc(this);
ASSERT(m_nMapMode > 0);
SetMapMode(&dc);
CSize sizeSb, sizeZoom, sizeClient;
long temp;
GetTrueClientSize(sizeClient,sizeSb);
CRect rectClient;
GetClientRect(rectClient);
rectClient.right=rectClient.left+sizeClient.cx;
rectClient.bottom=rectClient.top+sizeClient.cy;
dc.DPtoLP(rectClient);
sizeClient=rectClient.Size();
if(sizeClient.cy < 0)
sizeClient.cy = -sizeClient.cy;
temp = (long)((float)100 * (float)sizeClient.cx /
(float)m_totalLog.cx);
if(temp > (long)MAXZOOM)
sizeZoom.cx = MAXZOOM;
else
sizeZoom.cx = (int)temp;
temp = (long)((float)100 * (float)sizeClient.cy /
(float)m_totalLog.cy);
if(temp > (long)MAXZOOM)
sizeZoom.cy = MAXZOOM;
else
sizeZoom.cy = (int)temp;
// use the lower value
if(sizeZoom.cy < sizeZoom.cx)
nZoomLevel = sizeZoom.cy;
else
nZoomLevel = sizeZoom.cx;
if (nZoomLevel < MINZOOM)
nZoomLevel = MINZOOM;
}
SetZoomLevel(nZoomLevel);
}
void COXZoomView::ZoomToRectangle(CRect rectZoom, ZoomAlignment Align)
{
int nZoomLevel=GetZoomLevel();
{
CClientDC dc(this);
OnPrepareDC(&dc);
// clip zoom rectangle to document size
CRect rectDevDoc = m_rectLog;
dc.LPtoDP(rectDevDoc);
if(!rectZoom.IntersectRect(rectZoom, rectDevDoc))
return; // competely outside of the document, ignore
dc.DPtoLP(rectZoom);
// check again in logical coords
if(0 == rectZoom.Width())
return;
if(0 == rectZoom.Height())
return;
CSize sizeZoom=rectZoom.Size();
if(sizeZoom.cy < 0)
sizeZoom.cy = -sizeZoom.cy;
CSize sizeSb, sizeClient;
GetTrueClientSize(sizeClient,sizeSb);
CRect rectClient;
GetClientRect(rectClient);
rectClient.right=rectClient.left+sizeClient.cx;
rectClient.bottom=rectClient.top+sizeClient.cy;
SetMapMode(&dc); // assume 100%
dc.DPtoLP(rectClient);
sizeClient=rectClient.Size();
if(sizeClient.cy < 0)
sizeClient.cy = -sizeClient.cy;
long temp = (long)((float)100 * (float)sizeClient.cx /
(float)sizeZoom.cx);
if(temp > (long)MAXZOOM)
sizeZoom.cx = MAXZOOM;
else
sizeZoom.cx = (int)temp;
temp = (long)((float)100 * (float)sizeClient.cy /
(float)sizeZoom.cy);
if(temp > (long)MAXZOOM)
sizeZoom.cy = MAXZOOM;
else
sizeZoom.cy = (int)temp;
// use the lower value
if(sizeZoom.cy < sizeZoom.cx)
nZoomLevel = sizeZoom.cy;
else
nZoomLevel = sizeZoom.cx;
if (nZoomLevel < MINZOOM)
nZoomLevel = MINZOOM;
}
SetZoomLevel(nZoomLevel);
CPoint ptAlign;
if (m_hWnd != NULL)
{
if(Align == ZV_DEFAULT)
Align = m_align;
switch(Align)
{
case ZV_TOPLEFT:
ptAlign.x = rectZoom.left;
ptAlign.y = rectZoom.top;
break;
case ZV_BOTTOMLEFT:
ptAlign.x = rectZoom.left;
ptAlign.y = rectZoom.bottom;
break;
case ZV_CENTER:
ptAlign.x = (rectZoom.left + rectZoom.right)/2;
ptAlign.y = (rectZoom.top + rectZoom.bottom)/2;
break;
}
ScrollToPosition(ptAlign, Align);
UpdateBars();
Invalidate(TRUE);
}
}
int COXZoomView::SetZoomLevel(int nNewLevel, ZoomAlignment Align)
{
int nOldLevel = m_nZoomLevel;
if(Align == ZV_DEFAULT)
Align = m_align;
CPoint ptCurrent = GetScrollPosition(Align);
if(nNewLevel < MINZOOM)
nNewLevel = MINZOOM;
if(nNewLevel > MAXZOOM)
nNewLevel = MAXZOOM;
m_nZoomLevel = nNewLevel;
if(nOldLevel != nNewLevel)
{
//BLOCK: convert logical coordinate space to device coordinates
{
CWindowDC dc(NULL);
ASSERT(m_nMapMode > 0);
SetMapMode(&dc);
// total size
ScaleViewport(&dc);
m_totalDev = m_totalLog;
dc.LPtoDP((LPPOINT)&m_totalDev);
if (m_totalDev.cy < 0)
m_totalDev.cy = -m_totalDev.cy;
} // release DC here
ASSERT(m_totalDev.cx >= 0 && m_totalDev.cy >= 0);
if (m_hWnd != NULL)
{
// window exists, invalidate now
ScrollToPosition(ptCurrent, Align);
UpdateBars(FALSE);
Invalidate(TRUE);
}
}
#ifdef OXZOOMVIEW_USE_RULER
m_ruler.ZoomRuler(m_nZoomLevel,TRUE);
m_ruler.ZoomRuler(m_nZoomLevel,FALSE);
#endif // OXZOOMVIEW_USE_RULER
return(nOldLevel);
}
// zoom helper functions
void COXZoomView::SetMapMode(CDC* pDC) const
{
ASSERT(m_nMapMode > 0);
pDC->SetMapMode(m_nMapMode);
if(m_nMapMode == MM_ANISOTROPIC)
{
ASSERT(m_sizeDev.cx >= 10);
ASSERT(m_sizeDev.cy >= 10 || m_sizeDev.cy <= -10);
ASSERT(m_sizeDev.cx < 32000);
ASSERT(m_sizeDev.cy < 32000 || m_sizeDev.cy >= -32000);
pDC->SetWindowExt(m_totalLog);
pDC->SetViewportExt(m_sizeDev);
}
else
{
// unlock mapping mode for zooming, extents of previous map mode are inherited
pDC->SetMapMode(MM_ANISOTROPIC);
if(m_nMapMode == MM_TEXT)
{
// current extents are 1,1 which are too small to zoom down
pDC->ScaleWindowExt(1000, 1, 1000, 1);
pDC->ScaleViewportExt(1000, 1, 1000, 1);
}
}
}
void COXZoomView::SetZoomAlign(ZoomAlignment align)
{
#ifdef _DEBUG
if(align == ZV_DEFAULT)
TRACE(_T("You cannot set the ZoomAlignment to ZV_DEFAULT"));
#endif
if(align != ZV_DEFAULT)
m_align = align;
}
/////////////////////////////////////////////////////////////////////////////
// Getting information
CPoint COXZoomView::GetScrollPosition(ZoomAlignment Align) const // logical coordinates
{
CPoint pt = GetDeviceScrollPosition();
// pt may be negative if m_bCenter is set
CRect rectClient;
GetClientRect(rectClient);
DWORD dwStyle = GetStyle();
BOOL bHasV, bHasH;
bHasV = (dwStyle & WS_VSCROLL) != 0 || GetScrollBarCtrl(SB_VERT) != NULL;
bHasH = (dwStyle & WS_HSCROLL) != 0 || GetScrollBarCtrl(SB_HORZ) != NULL;
if(Align == ZV_DEFAULT)
Align = m_align;
switch (Align)
{
case ZV_BOTTOMLEFT:
if(bHasV)
pt.y += rectClient.Height();
else
pt.y = m_totalDev.cy - 1;
break;
case ZV_CENTER:
if(bHasV)
pt.y += rectClient.Height()/2;
else
pt.y = m_totalDev.cy/2;
if(bHasH)
pt.x += rectClient.Width()/2;
else
pt.x = m_totalDev.cx/2;
break;
}
ASSERT(m_nMapMode > 0); // must be set
CWindowDC dc(NULL);
SetMapMode(&dc);
ScaleViewport(&dc);
// CRect::TopLeft() doesn't work with const CRects
dc.SetWindowOrg(m_rectLog.left, m_rectLog.top);
dc.DPtoLP((LPPOINT)&pt);
return pt;
}
void COXZoomView::ScrollToPosition(POINT pt, ZoomAlignment Align) // logical coordinates
{
ASSERT(m_nMapMode > 0); // not allowed
CWindowDC dc(NULL);
SetMapMode(&dc);
ScaleViewport(&dc);
dc.SetWindowOrg(m_rectLog.TopLeft());
dc.LPtoDP((LPPOINT)&pt);
CRect rectClient;
GetClientRect(rectClient);
// now in device coordinates
if(Align == ZV_DEFAULT)
Align = m_align;
switch (Align)
{
case ZV_BOTTOMLEFT:
pt.y -= rectClient.Height();
break;
case ZV_CENTER:
pt.y -= rectClient.Height()/2;
pt.x -= rectClient.Width()/2;
break;
}
//limit if out of range
int xMin, xMax, yMin, yMax;
GetScrollRange(SB_HORZ, &xMin, &xMax);
GetScrollRange(SB_VERT, &yMin, &yMax);
ASSERT(xMin == 0 && yMin == 0);
if (pt.x < 0)
pt.x = 0;
else if (pt.x > xMax)
pt.x = xMax;
if (pt.y < 0)
pt.y = 0;
else if (pt.y > yMax)
pt.y = yMax;
ScrollToDevicePosition(pt);
}
CPoint COXZoomView::GetDeviceScrollPosition() const
{
CPoint pt(GetScrollPos(SB_HORZ), GetScrollPos(SB_VERT));
ASSERT(pt.x >= 0 && pt.y >= 0);
if (m_bCenter)
{
CRect rect;
GetClientRect(&rect);
// if client area is larger than total device size,
// the scroll positions are overridden to place origin such that
// output is centered in the window
// GetDeviceScrollPosition() must reflect this
if (m_totalDev.cx < rect.Width())
pt.x = -((rect.Width() - m_totalDev.cx) / 2);
if (m_totalDev.cy < rect.Height())
pt.y = -((rect.Height() - m_totalDev.cy) / 2);
}
return pt;
}
void COXZoomView::GetDeviceScrollSizes(int& nMapMode, SIZE& sizeTotal,
SIZE& sizePage, SIZE& sizeLine) const
{
if (m_nMapMode <= 0)
TRACE(_T("Warning: COXZoomView::GetDeviceScrollSizes returning invalid mapping mode\n"));
nMapMode = m_nMapMode;
sizeTotal = m_totalDev;
sizePage = m_pageDev;
sizeLine = m_lineDev;
}
void COXZoomView::ScrollToDevicePosition(POINT ptDev)
{
ASSERT(ptDev.x >= 0);
ASSERT(ptDev.y >= 0);
int dx, dy;
// Note: ScrollToDevicePosition can and is used to scroll out-of-range
// areas as far as COXZoomView is concerned -- specifically in
// the print-preview code. Since OnScrollBy makes sure the range is
// valid, ScrollToDevicePosition does not vector through OnScrollBy.
int xOrig = SetScrollPos(SB_HORZ, ptDev.x);
int yOrig = SetScrollPos(SB_VERT, ptDev.y);
dx = xOrig - ptDev.x;
dy = yOrig - ptDev.y;
ScrollWindow(dx, dy);
}
/////////////////////////////////////////////////////////////////////////////
// Other helpers
// retained for compatibility
void COXZoomView::FillOutsideRect(CDC* pDC, CBrush* pBrush)
{
ASSERT_VALID(pDC);
ASSERT_VALID(pBrush);
// Fill Rect outside the image
CRect rect;
GetClientRect(rect);
ASSERT(rect.left == 0 && rect.top == 0);
rect.left = m_totalDev.cx;
if (!rect.IsRectEmpty())
pDC->FillRect(rect, pBrush); // vertical strip along the side
rect.left = 0;
rect.right = m_totalDev.cx;
rect.top = m_totalDev.cy;
if (!rect.IsRectEmpty())
pDC->FillRect(rect, pBrush); // horizontal strip along the bottom
}
/////////////////////////////////////////////////////////////////////////////
void COXZoomView::OnSize(UINT nType, int cx, int cy)
{
CView::OnSize(nType, cx, cy);
UpdateBars(FALSE);
}
/////////////////////////////////////////////////////////////////////////////
// Tie to scrollbars and CWnd behaviour
void COXZoomView::GetScrollBarSizes(CSize& sizeSb)
{
sizeSb.cx = sizeSb.cy = 0;
DWORD dwStyle = GetStyle();
if (GetScrollBarCtrl(SB_VERT) == NULL)
{
// vert scrollbars will impact client area of this window
sizeSb.cx = GetSystemMetrics(SM_CXVSCROLL);
if (dwStyle & WS_BORDER)
sizeSb.cx -= GetSystemMetrics(SM_CXBORDER);
}
if (GetScrollBarCtrl(SB_HORZ) == NULL)
{
// horz scrollbars will impact client area of this window
sizeSb.cy = GetSystemMetrics(SM_CYHSCROLL);
if (dwStyle & WS_BORDER)
sizeSb.cy -= GetSystemMetrics(SM_CYBORDER);
}
}
BOOL COXZoomView::GetTrueClientSize(CSize& size, CSize& sizeSb)
// return TRUE if enough room to add scrollbars if needed
{
CRect rect;
GetClientRect(&rect);
ASSERT(rect.top == 0 && rect.left == 0);
size.cx = rect.right;
size.cy = rect.bottom;
DWORD dwStyle = GetStyle();
// first get the size of the scrollbars for this window
GetScrollBarSizes(sizeSb);
// first calculate the size of a potential scrollbar
// (scroll bar controls do not get turned on/off)
if (sizeSb.cx != 0 && (dwStyle & WS_VSCROLL))
{
// vert scrollbars will impact client area of this window
size.cx += sizeSb.cx; // currently on - adjust now
}
if (sizeSb.cy != 0 && (dwStyle & WS_HSCROLL))
{
// horz scrollbars will impact client area of this window
size.cy += sizeSb.cy; // currently on - adjust now
}
// return TRUE if enough room
return (size.cx > sizeSb.cx && size.cy > sizeSb.cy);
}
// helper to return the state of the scrollbars without actually changing
// the state of the scrollbars
void COXZoomView::GetScrollBarState(CSize sizeClient, CSize& needSb,
CSize& sizeRange, CPoint& ptMove, BOOL bInsideClient)
{
// get scroll bar sizes (the part that is in the client area)
CSize sizeSb;
GetScrollBarSizes(sizeSb);
// enough room to add scrollbars
sizeRange = m_totalDev - sizeClient;
// > 0 => need to scroll
ptMove = GetDeviceScrollPosition();
// point to move to (start at current scroll pos)
BOOL bNeedH = sizeRange.cx > 0;
if (!bNeedH)
ptMove.x = 0; // jump back to origin
else if (bInsideClient)
sizeRange.cy += sizeSb.cy; // need room for a scroll bar
BOOL bNeedV = sizeRange.cy > 0;
if (!bNeedV)
ptMove.y = 0; // jump back to origin
//ptMove.y = m_totalDev.cy - sizeClient.cy;
else if (bInsideClient)
sizeRange.cx += sizeSb.cx; // need room for a scroll bar
if (bNeedV && !bNeedH && sizeRange.cx > 0)
{
ASSERT(bInsideClient);
// need a horizontal scrollbar after all
bNeedH = TRUE;
sizeRange.cy += sizeSb.cy;
}
// if current scroll position will be past the limit, scroll to limit
if (sizeRange.cx > 0 && ptMove.x >= sizeRange.cx)
ptMove.x = sizeRange.cx;
if (sizeRange.cy > 0 && ptMove.y >= sizeRange.cy)
ptMove.y = sizeRange.cy;
// now update the bars as appropriate
needSb.cx = bNeedH;
needSb.cy = bNeedV;
// needSb, sizeRange, and ptMove area now all updated
}
void COXZoomView::UpdateBars(BOOL /*bSendRecalc*/)
{
// UpdateBars may cause window to be resized - ignore those resizings
if (m_bInsideUpdate)
return; // Do not allow recursive calls
// Lock out recursion
m_bInsideUpdate = TRUE;
// update the horizontal to reflect reality
// NOTE: turning on/off the scrollbars will cause 'OnSize' callbacks
ASSERT(m_totalDev.cx >= 0 && m_totalDev.cy >= 0);
CRect rectClient;
BOOL bCalcClient = TRUE;
// allow parent to do inside-out layout first
CWnd* pParentWnd = GetParent();
if (pParentWnd != NULL)
{
// if parent window responds to this message, use just
// client area for scroll bar calc -- not "true" client area
if ((BOOL)pParentWnd->SendMessage(WM_RECALCPARENT, 0,
(LPARAM)(LPCRECT)&rectClient) != 0)
{
// use rectClient instead of GetTrueClientSize for
// client size calculation.
bCalcClient = FALSE;
}
}
CSize sizeClient;
CSize sizeSb;
if (bCalcClient)
{
// get client rect
if (!GetTrueClientSize(sizeClient, sizeSb))
{
// no room for scroll bars (common for zero sized elements)
CRect rect;
GetClientRect(&rect);
if (rect.right > 0 && rect.bottom > 0)
{
// if entire client area is not invisible, assume we have
// control over our scrollbars
EnableScrollBarCtrl(SB_BOTH, FALSE);
}
m_bInsideUpdate = FALSE;
return;
}
}
else
{
// let parent window determine the "client" rect
sizeClient.cx = rectClient.right - rectClient.left;
sizeClient.cy = rectClient.bottom - rectClient.top;
}
// enough room to add scrollbars
CSize sizeRange;
CPoint ptMove;
CSize needSb;
// if scrolling-sizes are relative to client area update them NOW
if(m_bUseRelativeScrollSizes)
{
m_pageDev.cx = MulDiv(m_nPagePercent, sizeClient.cx, 100);
m_pageDev.cy = MulDiv(m_nPagePercent, sizeClient.cy, 100);
m_lineDev.cx = MulDiv(m_nLinePercent, sizeClient.cx, 100);
m_lineDev.cy = MulDiv(m_nLinePercent, sizeClient.cy, 100);
}
// get the current scroll bar state given the true client area
GetScrollBarState(sizeClient, needSb, sizeRange, ptMove, bCalcClient);
if (needSb.cx)
sizeClient.cy -= sizeSb.cy;
if (needSb.cy)
sizeClient.cx -= sizeSb.cx;
// first scroll the window as needed
ScrollToDevicePosition(ptMove); // will set the scroll bar positions too
// this structure needed to update the scrollbar page range
SCROLLINFO info;
info.fMask = SIF_PAGE|SIF_RANGE;
info.nMin = 0;
// now update the bars as appropriate
EnableScrollBarCtrl(SB_HORZ, needSb.cx);
if (needSb.cx)
{
info.nPage = sizeClient.cx;
info.nMax = m_totalDev.cx-1;
if(!SetScrollInfo(SB_HORZ, &info, TRUE))
SetScrollRange(SB_HORZ, 0, sizeRange.cx, TRUE);
}
EnableScrollBarCtrl(SB_VERT, needSb.cy);
if (needSb.cy)
{
info.nPage = sizeClient.cy;
info.nMax = m_totalDev.cy-1;
if(!SetScrollInfo(SB_VERT, &info, TRUE))
SetScrollRange(SB_VERT, 0, sizeRange.cy, TRUE);
}
// Remove recursion lockout
m_bInsideUpdate = FALSE;
}
void COXZoomView::CalcWindowRect(LPRECT lpClientRect, UINT nAdjustType)
{
if (nAdjustType == adjustOutside)
{
// if the view is being used in-place, add scrollbar sizes
// (scollbars should appear on the outside when in-place editing)
CSize sizeClient(
lpClientRect->right - lpClientRect->left,
lpClientRect->bottom - lpClientRect->top);
CSize sizeRange = m_totalDev - sizeClient;
// > 0 => need to scroll
// get scroll bar sizes (used to adjust the window)
CSize sizeSb;
GetScrollBarSizes(sizeSb);
// adjust the window size based on the state
if (sizeRange.cy > 0)
{ // vertical scroll bars take up horizontal space
lpClientRect->right += sizeSb.cx;
}
if (sizeRange.cx > 0)
{ // horizontal scroll bars take up vertical space
lpClientRect->bottom += sizeSb.cy;
}
}
else
{
// call default to handle other non-client areas
::AdjustWindowRect(lpClientRect, GetStyle(), FALSE);
}
}
/////////////////////////////////////////////////////////////////////////////
// COXZoomView scrolling
void COXZoomView::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
ASSERT(pScrollBar == GetScrollBarCtrl(SB_HORZ)); // may be null
UNUSED(pScrollBar);
OnScroll(MAKEWORD(nSBCode, -1), nPos);
}
void COXZoomView::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
ASSERT(pScrollBar == GetScrollBarCtrl(SB_VERT)); // may be null
UNUSED(pScrollBar);
OnScroll(MAKEWORD(-1, nSBCode), nPos);
}
BOOL COXZoomView::OnScroll(UINT nScrollCode, UINT nPos, BOOL bDoScroll)
{
// calc new x position
int x = GetScrollPos(SB_HORZ);
int xOrig = x;
switch (LOBYTE(nScrollCode))
{
case SB_TOP:
x = 0;
break;
case SB_BOTTOM:
x = INT_MAX;
break;
case SB_LINEUP:
x -= m_lineDev.cx;
break;
case SB_LINEDOWN:
x += m_lineDev.cx;
break;
case SB_PAGEUP:
x -= m_pageDev.cx;
break;
case SB_PAGEDOWN:
x += m_pageDev.cx;
break;
case SB_THUMBTRACK:
x = nPos;
break;
}
// calc new y position
int y = GetScrollPos(SB_VERT);
int yOrig = y;
switch (HIBYTE(nScrollCode))
{
case SB_TOP:
y = 0;
break;
case SB_BOTTOM:
y = INT_MAX;
break;
case SB_LINEUP:
y -= m_lineDev.cy;
break;
case SB_LINEDOWN:
y += m_lineDev.cy;
break;
case SB_PAGEUP:
y -= m_pageDev.cy;
break;
case SB_PAGEDOWN:
y += m_pageDev.cy;
break;
case SB_THUMBTRACK:
y = nPos;
break;
}
BOOL bResult = OnScrollBy(CSize(x - xOrig, y - yOrig), bDoScroll);
if (bResult && bDoScroll)
UpdateWindow();
return bResult;
}
BOOL COXZoomView::OnScrollBy(CSize sizeScroll, BOOL bDoScroll)
{
int xOrig, x;
int yOrig, y;
// don't scroll if there is no valid scroll range (ie. no scroll bar)
CScrollBar* pBar;
DWORD dwStyle = GetStyle();
pBar = GetScrollBarCtrl(SB_VERT);
if ((pBar != NULL && !pBar->IsWindowEnabled()) ||
(pBar == NULL && !(dwStyle & WS_VSCROLL)))
{
// vertical scroll bar not enabled
sizeScroll.cy = 0;
}
pBar = GetScrollBarCtrl(SB_HORZ);
if ((pBar != NULL && !pBar->IsWindowEnabled()) ||
(pBar == NULL && !(dwStyle & WS_HSCROLL)))
{
// horizontal scroll bar not enabled
sizeScroll.cx = 0;
}
// adjust current x position
xOrig = x = GetScrollPos(SB_HORZ);
int xMax = GetScrollLimit(SB_HORZ);
x += sizeScroll.cx;
if (x < 0)
x = 0;
else if (x > xMax)
x = xMax;
// adjust current y position
yOrig = y = GetScrollPos(SB_VERT);
int yMax = GetScrollLimit(SB_VERT);
y += sizeScroll.cy;
if (y < 0)
y = 0;
else if (y > yMax)
y = yMax;
// did anything change?
if (x == xOrig && y == yOrig)
return FALSE;
if (bDoScroll)
{
// do scroll and update scroll positions
ScrollWindow(-(x-xOrig), -(y-yOrig));
if (x != xOrig)
SetScrollPos(SB_HORZ, x);
if (y != yOrig)
SetScrollPos(SB_VERT, y);
}
return TRUE;
}
BOOL COXZoomView::OnMouseWheel(UINT fFlags, short zDelta, CPoint point)
{
// we don't handle anything but scrolling just now
if (fFlags & (MK_SHIFT | MK_CONTROL))
return FALSE;
// if the parent is a splitter, it will handle the message
if (GetParentSplitter(this, TRUE))
return FALSE;
// we can't get out of it--perform the scroll ourselves
return DoMouseWheel(fFlags, zDelta, point);
}
// This function isn't virtual. If you need to override it,
// you really need to override OnMouseWheel() here or in
// CSplitterWnd.
BOOL COXZoomView::DoMouseWheel(UINT fFlags, short zDelta, CPoint point)
{
UNUSED_ALWAYS(point);
UNUSED_ALWAYS(fFlags);
// if we have a vertical scroll bar, the wheel scrolls that
// if we have _only_ a horizontal scroll bar, the wheel scrolls that
// otherwise, don't do any work at all
DWORD dwStyle = GetStyle();
CScrollBar* pBar = GetScrollBarCtrl(SB_VERT);
BOOL bHasVertBar = ((pBar != NULL) && pBar->IsWindowEnabled()) ||
(dwStyle & WS_VSCROLL);
pBar = GetScrollBarCtrl(SB_HORZ);
BOOL bHasHorzBar = ((pBar != NULL) && pBar->IsWindowEnabled()) ||
(dwStyle & WS_HSCROLL);
if (!bHasVertBar && !bHasHorzBar)
return FALSE;
BOOL bResult = FALSE;
UINT uWheelScrollLines=GetMouseScrollLines();
int nToScroll;
int nDisplacement;
if (bHasVertBar)
{
nToScroll = ::MulDiv(-zDelta, uWheelScrollLines, WHEEL_DELTA);
if (nToScroll == -1 || uWheelScrollLines == WHEEL_PAGESCROLL)
{
nDisplacement = m_pageDev.cy;
if (zDelta > 0)
nDisplacement = -nDisplacement;
}
else
{
nDisplacement = nToScroll * m_lineDev.cy;
nDisplacement = min(nDisplacement, m_pageDev.cy);
}
bResult = OnScrollBy(CSize(0, nDisplacement), TRUE);
}
else if (bHasHorzBar)
{
nToScroll = ::MulDiv(-zDelta, uWheelScrollLines, WHEEL_DELTA);
if (nToScroll == -1 || uWheelScrollLines == WHEEL_PAGESCROLL)
{
nDisplacement = m_pageDev.cx;
if (zDelta > 0)
nDisplacement = -nDisplacement;
}
else
{
nDisplacement = nToScroll * m_lineDev.cx;
nDisplacement = min(nDisplacement, m_pageDev.cx);
}
bResult = OnScrollBy(CSize(nDisplacement, 0), TRUE);
}
if (bResult)
UpdateWindow();
return bResult;
}
static BOOL g_bGotScrollLines = FALSE;
UINT COXZoomView::GetMouseScrollLines()
{
static UINT uCachedScrollLines;
// if we've already got it and we're not refreshing,
// return what we've already got
if (g_bGotScrollLines)
return uCachedScrollLines;
// see if we can find the mouse window
g_bGotScrollLines = TRUE;
static UINT msgGetScrollLines;
static WORD nRegisteredMessage;
if (nRegisteredMessage == 0)
{
msgGetScrollLines = ::RegisterWindowMessage(MSH_SCROLL_LINES);
if (msgGetScrollLines == 0)
nRegisteredMessage = 1; // couldn't register! never try again
else
nRegisteredMessage = 2; // it worked: use it
}
if (nRegisteredMessage == 2)
{
HWND hwMouseWheel = NULL;
hwMouseWheel = ::FindWindow(MSH_WHEELMODULE_CLASS, MSH_WHEELMODULE_TITLE);
if (hwMouseWheel && msgGetScrollLines)
{
uCachedScrollLines = (UINT)
::SendMessage(hwMouseWheel, msgGetScrollLines, 0, 0);
return uCachedScrollLines;
}
}
// couldn't use the window -- try system settings
uCachedScrollLines = 3; // reasonable default
DWORD dwVersion = GetVersion();
if (dwVersion < 0x80000000) // Windows NT/2000/XP
{
HKEY hKey;
if (RegOpenKeyEx(HKEY_CURRENT_USER, _T("Control Panel\\Desktop"),
0, KEY_QUERY_VALUE, &hKey) == ERROR_SUCCESS)
{
TCHAR szData[128];
DWORD dwKeyDataType;
DWORD dwDataBufSize = _countof(szData);
if (RegQueryValueEx(hKey, _T("WheelScrollLines"), NULL, &dwKeyDataType,
(LPBYTE) &szData, &dwDataBufSize) == ERROR_SUCCESS)
{
uCachedScrollLines = _tcstoul(szData, NULL, 10);
}
RegCloseKey(hKey);
}
}
// v9.3 update 02 - VS2008 - AUX_DATA no longer has these
#if _MFC_VER < 0x0800
#if _MFC_VER > 0x0421
else if (!afxData.bWin95)
#else
else if (!afxData.bWin32s)
#endif
{
::SystemParametersInfo(SPI_GETWHEELSCROLLLINES, 0, &uCachedScrollLines, 0);
}
#endif // _MFC_VER < 0x0800
return uCachedScrollLines;
}
/////////////////////////////////////////////////////////////////////////////
// COXZoomView diagnostics
#ifdef _DEBUG
void COXZoomView::Dump(CDumpContext& dc) const
{
ASSERT_VALID(this);
CView::Dump(dc);
AFX_DUMP1(dc, "\nm_totalLog = ", m_totalLog);
AFX_DUMP1(dc, "\nm_totalDev = ", m_totalDev);
AFX_DUMP1(dc, "\nm_pageDev = ", m_pageDev);
AFX_DUMP1(dc, "\nm_lineDev = ", m_lineDev);
AFX_DUMP1(dc, "\nm_bCenter = ", m_bCenter);
AFX_DUMP1(dc, "\nm_bInsideUpdate = ", m_bInsideUpdate);
AFX_DUMP0(dc, "\nm_nMapMode = ");
switch (m_nMapMode)
{
case MM_NONE:
AFX_DUMP0(dc, "MM_NONE");
break;
case MM_TEXT:
AFX_DUMP0(dc, "MM_TEXT");
break;
case MM_LOMETRIC:
AFX_DUMP0(dc, "MM_LOMETRIC");
break;
case MM_HIMETRIC:
AFX_DUMP0(dc, "MM_HIMETRIC");
break;
case MM_LOENGLISH:
AFX_DUMP0(dc, "MM_LOENGLISH");
break;
case MM_HIENGLISH:
AFX_DUMP0(dc, "MM_HIENGLISH");
break;
case MM_TWIPS:
AFX_DUMP0(dc, "MM_TWIPS");
break;
case MM_ANISOTROPIC:
AFX_DUMP0(dc, "MM_ANISOTROPIC");
AFX_DUMP1(dc, "\nm_sizeDev = ", m_sizeDev);
break;
default:
AFX_DUMP0(dc, "*unknown*");
break;
}
AFX_DUMP1(dc, "\nm_nZoomLevel = ", m_nZoomLevel);
AFX_DUMP1(dc, "\nm_bAlignToBottom = ", m_bAlignToBottom);
AFX_DUMP1(dc, "\nm_bUseRelativeScrollSizes = ", m_bUseRelativeScrollSizes);
if(m_bUseRelativeScrollSizes)
{
AFX_DUMP1(dc, "\nm_nPagePercent = ", m_nPagePercent);
AFX_DUMP1(dc, "\nm_nLinePercent = ", m_nLinePercent);
}
AFX_DUMP0(dc, "\nm_align = ");
switch (m_align)
{
case ZV_TOPLEFT:
AFX_DUMP0(dc, "TOPLEFT");
break;
case ZV_BOTTOMLEFT:
AFX_DUMP0(dc, "BOTTOMLEFT");
break;
case ZV_CENTER:
AFX_DUMP0(dc, "CENTER");
break;
default:
AFX_DUMP0(dc, "*illegal*");
break;
}
}
void COXZoomView::AssertValid() const
{
CView::AssertValid();
switch (m_nMapMode)
{
case MM_NONE:
case MM_TEXT:
case MM_LOMETRIC:
case MM_HIMETRIC:
case MM_LOENGLISH:
case MM_HIENGLISH:
case MM_TWIPS:
case MM_ANISOTROPIC:
break;
case MM_ISOTROPIC:
ASSERT(FALSE); // illegal mapping mode
default:
ASSERT(FALSE); // unknown mapping mode
}
}
#endif //_DEBUG
/////////////////////////////////////////////////////////////////////////////
// CZoomRect
// little helper class for zooming to a rectangle
// DON'T comment om this !!
BOOL CZoomRect::TrackTheMouse(UINT uMessageEnd, CWnd *pWnd, CRect& rectZoom, CPoint ptAnchor)
{
// return FALSE if mouse is already captured
if(NULL != CWnd::GetCapture())
return(FALSE);
CRect rectClip;
MSG msg;
// capture the mouse and clip it to the client area
pWnd->SetCapture();
pWnd->GetClientRect(rectClip);
pWnd->ClientToScreen(rectClip);
::ClipCursor(rectClip);
// preset member vars
m_bSuccess = FALSE;
m_bFirstMove = TRUE;
m_ptOrig = ptAnchor;
m_uMessageEnd = uMessageEnd;
msg.message = WM_NULL; // safe start value
// looks weird, but works real nice
while(ProcessMsg(&msg, pWnd))
RetrieveMsg(&msg);
// free mouse and clipping
::ClipCursor(NULL);
::ReleaseCapture();
if(!m_bFirstMove) // at least one WM_MOUSEMOVE processed
{
CClientDC dc(pWnd);
DrawZoomRect(&dc);
}
// setup return rect and normalize it
rectZoom.TopLeft() = m_ptOrig;
rectZoom.BottomRight() = m_ptLast;
int ntemp;
if(rectZoom.left > rectZoom.right)
{
ntemp = rectZoom.left;
rectZoom.left = rectZoom.right;
rectZoom.right = ntemp;
}
if(rectZoom.top > rectZoom.bottom)
{
ntemp = rectZoom.top;
rectZoom.top = rectZoom.bottom;
rectZoom.bottom = ntemp;
}
return(m_bSuccess);
}
void CZoomRect::RetrieveMsg(MSG* pmsg)
{
// get a message out of the queue
while(!::PeekMessage(pmsg, 0, 0, 0, PM_REMOVE));
return;
}
BOOL CZoomRect::ProcessMsg(MSG* pmsg, CWnd* pWnd)
{
// ending message ?
if(m_uMessageEnd == pmsg->message)
{
m_bSuccess = TRUE;
CPoint pt(pmsg->lParam);
UpdateRectangle(pWnd, pt);
return(FALSE);
}
switch(pmsg->message)
{
case WM_MOUSEMOVE:
{
CPoint pt(pmsg->lParam);
UpdateRectangle(pWnd, pt);
}
break;
case WM_CANCELMODE:
return(FALSE);
case WM_KEYDOWN:
if(VK_ESCAPE == pmsg->wParam)
return(FALSE);
// else fall through
default:
::TranslateMessage(pmsg);
::DispatchMessage(pmsg);
}
return(TRUE);
}
void CZoomRect::UpdateRectangle(CWnd* pWnd, CPoint& pt)
{
CClientDC dc(pWnd);
// if this is the first move, there is no old rect to remove
if(m_bFirstMove)
m_bFirstMove = FALSE;
else // erase old rect
DrawZoomRect(&dc);
m_ptLast = pt;
DrawZoomRect(&dc);
}
void CZoomRect::DrawZoomRect(CDC* pDC)
{
int nOldRop = pDC->SetROP2(R2_NOTXORPEN);
pDC->MoveTo(m_ptOrig);
pDC->LineTo(m_ptLast.x, m_ptOrig.y);
pDC->LineTo(m_ptLast);
pDC->LineTo(m_ptOrig.x, m_ptLast.y);
pDC->LineTo(m_ptOrig);
pDC->SetROP2(nOldRop);
}
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