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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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drawpic
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drawpicc.cpp
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C/C++ Source or Header
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1998-03-26
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9KB
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342 lines
// DrawPicC.cpp : Implementation of the CDrawPicCtrl OLE control class.
// This is a part of the Microsoft Foundation Classes C++ library.
// Copyright (C) 1992-1998 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 "DrawPic.h"
#include "afxcmn.h"
#include "DrawPicC.h"
#include "DrawPicP.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
IMPLEMENT_DYNCREATE(CDrawPicCtrl, COleControl)
/////////////////////////////////////////////////////////////////////////////
// Message map
BEGIN_MESSAGE_MAP(CDrawPicCtrl, COleControl)
//{{AFX_MSG_MAP(CDrawPicCtrl)
// NOTE - ClassWizard will add and remove message map entries
// DO NOT EDIT what you see in these blocks of generated code !
//}}AFX_MSG_MAP
ON_OLEVERB(AFX_IDS_VERB_PROPERTIES, OnProperties)
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// Dispatch map
BEGIN_DISPATCH_MAP(CDrawPicCtrl, COleControl)
//{{AFX_DISPATCH_MAP(CDrawPicCtrl)
DISP_FUNCTION(CDrawPicCtrl, "AddPicture", AddPicture, VT_BOOL, VTS_PICTURE)
DISP_FUNCTION(CDrawPicCtrl, "ClearImageList", ClearImageList, VT_EMPTY, VTS_NONE)
//}}AFX_DISPATCH_MAP
DISP_FUNCTION_ID(CDrawPicCtrl, "AboutBox", DISPID_ABOUTBOX, AboutBox, VT_EMPTY, VTS_NONE)
END_DISPATCH_MAP()
/////////////////////////////////////////////////////////////////////////////
// Event map
BEGIN_EVENT_MAP(CDrawPicCtrl, COleControl)
//{{AFX_EVENT_MAP(CDrawPicCtrl)
// NOTE - ClassWizard will add and remove event map entries
// DO NOT EDIT what you see in these blocks of generated code !
//}}AFX_EVENT_MAP
END_EVENT_MAP()
/////////////////////////////////////////////////////////////////////////////
// Property pages
// TODO: Add more property pages as needed. Remember to increase the count!
BEGIN_PROPPAGEIDS(CDrawPicCtrl, 1)
PROPPAGEID(CDrawPicPropPage::guid)
END_PROPPAGEIDS(CDrawPicCtrl)
/////////////////////////////////////////////////////////////////////////////
// Initialize class factory and guid
IMPLEMENT_OLECREATE_EX(CDrawPicCtrl, "DRAWPIC.DrawPicCtrl.1",
0x57f5a423, 0xa324, 0x11cf, 0xb4, 0xa4, 0x44, 0x45, 0x53, 0x54, 0, 0)
/////////////////////////////////////////////////////////////////////////////
// Type library ID and version
IMPLEMENT_OLETYPELIB(CDrawPicCtrl, _tlid, _wVerMajor, _wVerMinor)
/////////////////////////////////////////////////////////////////////////////
// Interface IDs
const IID BASED_CODE IID_DDrawPic =
{ 0x57f5a421, 0xa324, 0x11cf, { 0xb4, 0xa4, 0x44, 0x45, 0x53, 0x54, 0, 0 } };
const IID BASED_CODE IID_DDrawPicEvents =
{ 0x57f5a422, 0xa324, 0x11cf, { 0xb4, 0xa4, 0x44, 0x45, 0x53, 0x54, 0, 0 } };
/////////////////////////////////////////////////////////////////////////////
// Control type information
static const DWORD BASED_CODE _dwDrawPicOleMisc =
OLEMISC_ACTIVATEWHENVISIBLE |
OLEMISC_SETCLIENTSITEFIRST |
OLEMISC_INSIDEOUT |
OLEMISC_CANTLINKINSIDE |
OLEMISC_RECOMPOSEONRESIZE;
IMPLEMENT_OLECTLTYPE(CDrawPicCtrl, IDS_DRAWPIC, _dwDrawPicOleMisc)
/////////////////////////////////////////////////////////////////////////////
// CDrawPicCtrl::CDrawPicCtrlFactory::UpdateRegistry -
// Adds or removes system registry entries for CDrawPicCtrl
BOOL CDrawPicCtrl::CDrawPicCtrlFactory::UpdateRegistry(BOOL bRegister)
{
if (bRegister)
return AfxOleRegisterControlClass(
AfxGetInstanceHandle(),
m_clsid,
m_lpszProgID,
IDS_DRAWPIC,
IDB_DRAWPIC,
FALSE, // Not insertable
_dwDrawPicOleMisc,
_tlid,
_wVerMajor,
_wVerMinor);
else
return AfxOleUnregisterClass(m_clsid, m_lpszProgID);
}
/////////////////////////////////////////////////////////////////////////////
// CDrawPicCtrl::CDrawPicCtrl - Constructor
CDrawPicCtrl::CDrawPicCtrl()
{
InitializeIIDs(&IID_DDrawPic, &IID_DDrawPicEvents);
m_ImageList.m_hImageList = NULL;
}
/////////////////////////////////////////////////////////////////////////////
// CDrawPicCtrl::~CDrawPicCtrl - Destructor
CDrawPicCtrl::~CDrawPicCtrl()
{
// TODO: Cleanup your control's instance data here.
}
/////////////////////////////////////////////////////////////////////////////
// CDrawPicCtrl::OnDraw - Drawing function
void CDrawPicCtrl::OnDraw(
CDC* pdc, const CRect& rcBounds, const CRect& rcInvalid)
{
// clear the background
pdc->FillRect(rcBounds, CBrush::FromHandle((HBRUSH)GetStockObject(WHITE_BRUSH)));
// make sure we have an imagelist
if (NULL == m_ImageList.m_hImageList)
{
return;
}
CPoint ptImagePt(rcBounds.left, rcBounds.top);
// get number of images in imagelist
int nImageCount = m_ImageList.GetImageCount();
// for each image in list
for (int nImageIndx = 0; nImageIndx < nImageCount; nImageIndx++)
{
// calc point to draw it at
ptImagePt.x = (m_szImageSize.cx * nImageIndx) + rcBounds.left;
// render the image
m_ImageList.Draw(pdc, nImageIndx, ptImagePt, ILD_NORMAL);
}
}
/////////////////////////////////////////////////////////////////////////////
// CDrawPicCtrl::DoPropExchange - Persistence support
void CDrawPicCtrl::DoPropExchange(CPropExchange* pPX)
{
ExchangeVersion(pPX, MAKELONG(_wVerMinor, _wVerMajor));
COleControl::DoPropExchange(pPX);
// TODO: Call PX_ functions for each persistent custom property.
}
/////////////////////////////////////////////////////////////////////////////
// CDrawPicCtrl::OnResetState - Reset control to default state
void CDrawPicCtrl::OnResetState()
{
COleControl::OnResetState(); // Resets defaults found in DoPropExchange
// TODO: Reset any other control state here.
}
/////////////////////////////////////////////////////////////////////////////
// CDrawPicCtrl::AboutBox - Display an "About" box to the user
void CDrawPicCtrl::AboutBox()
{
CDialog dlgAbout(IDD_ABOUTBOX_DRAWPIC);
dlgAbout.DoModal();
}
/////////////////////////////////////////////////////////////////////////////
// CDrawPicCtrl message handlers
BOOL CDrawPicCtrl::AddPicture(LPPICTUREDISP NewPic)
{
BOOL bRetVal = TRUE;
long lPicHeight = 0;
long lPicWidth = 0;
CDC * cdc = GetDC();
CSize sizePic;
int nRetVal;
CPictureHolder NewPicture;
// put picture into a picture holder
NewPicture.SetPictureDispatch(NewPic);
if (NULL == NewPicture.m_pPict)
{
return FALSE;
}
// if picture is a bitmap
if (PICTYPE_BITMAP == NewPicture.GetType())
{
HBITMAP hBitmap = NULL;
// get handle of the bitmap
NewPicture.m_pPict->get_Handle((OLE_HANDLE FAR *) &hBitmap);
// get dimensions of bitmap
NewPicture.m_pPict->get_Width(&lPicWidth);
NewPicture.m_pPict->get_Height(&lPicHeight);
sizePic.cx = (int)lPicWidth;
sizePic.cy = (int)lPicHeight;
// convert coordinates from units to logical units
cdc->HIMETRICtoLP(&sizePic);
// if image list has not been created
if (NULL == m_ImageList.m_hImageList)
{
m_szImageSize = sizePic;
// create the image list
bRetVal = m_ImageList.Create(m_szImageSize.cx, m_szImageSize.cy, FALSE, 1, 1);
}
// else make sure new picture is the same size
else if (sizePic != m_szImageSize)
{
return FALSE;
}
// create a temp bitmap
CBitmap * TempBmp = CBitmap::FromHandle(hBitmap);
if (bRetVal)
{
// add bitmap to imagelist; mask is ignored in this sample
nRetVal = m_ImageList.Add(TempBmp, RGB(0, 0, 0) ) ;
bRetVal = (nRetVal != -1);
}
// redraw with new picture
InvalidateControl();
}
// else if picture is an icon
else if (PICTYPE_ICON == NewPicture.GetType())
{
HICON hIcon;
// get handle of the icon
NewPicture.m_pPict->get_Handle((OLE_HANDLE FAR *) &hIcon);
// get dimensions of icon
NewPicture.m_pPict->get_Width(&lPicWidth);
NewPicture.m_pPict->get_Height(&lPicHeight);
CDC * cdc = GetDC();
sizePic.cx = (int)lPicWidth;
sizePic.cy = (int)lPicHeight;
// convert coordinates from units to logical units
cdc->HIMETRICtoLP(&sizePic);
// if image list has not been created
if (NULL == m_ImageList.m_hImageList)
{
m_szImageSize = sizePic;
// create the image list
bRetVal = m_ImageList.Create(m_szImageSize.cx, m_szImageSize.cy, FALSE, 1, 1);
}
// else make sure new picture is the same size
else if (sizePic != m_szImageSize)
{
return FALSE;
}
if (bRetVal)
{
// add icon to image list
nRetVal = m_ImageList.Add(hIcon);
bRetVal = (nRetVal != -1);
}
InvalidateControl();
}
else
{
bRetVal = FALSE;
}
return (bRetVal);
}
void CDrawPicCtrl::ClearImageList()
{
// delete all the images from the list
m_ImageList.DeleteImageList();
InvalidateControl();
}