////////////////////////////////////////////////////////////////
// MSDN Magazine -- October 2001
// If this code works, it was written by Paul DiLascia.
// If not, I don't know who wrote it.
// Compiles with Visual C++ 6.0 for Windows 98 and probably Windows 2000 too.
// Set tabsize = 3 in your editor.
//
#include "picture.h"
#include "StatLink.h"
#pragma once
//////////////////
// Class to encapsulate IPicture. This does not wrap all IPicture methods,
// only the ones I needed to implement ImgView -- feel free to add the others
// yourself.
//
class CPictureCtrl : public CStaticLink {
public:
CPictureCtrl(BOOL bAutoLoadImage=TRUE);
~CPictureCtrl();
// brainless wrappers call CPicture
BOOL LoadImage(UINT nIDRes) {
Invalidate();
return m_pict.Load(nIDRes);
}
BOOL LoadImage(LPCTSTR pszPathName) {
Invalidate();
return m_pict.Load(pszPathName);
}
BOOL LoadImage(CArchive& ar) {
Invalidate();
return m_pict.Load(ar);
}
BOOL LoadImage(IStream* pstm) {
Invalidate();
return m_pict.Load(pstm);
}
CSize GetImageSize() {
return m_pict.GetImageSize();
}
const CPicture* GetPicture() {
return &m_pict;
}
protected:
CPicture m_pict; // picture
BOOL m_bAutoLoadImage; // automatically load image w/same Ctrl ID
virtual void PreSubclassWindow();
// message handlers
afx_msg void OnPaint();
afx_msg int OnCreate(LPCREATESTRUCT lpcs);
afx_msg BOOL OnEraseBkgnd(CDC* pDC);
DECLARE_DYNAMIC(CPictureCtrl)
DECLARE_MESSAGE_MAP()
};
------------------------------------------------------------------
////////////////////////////////////////////////////////////////
// MSDN Magazine -- October 2001
// If this code works, it was written by Paul DiLascia.
// If not, I don't know who wrote it.
// Compiles with Visual C++ 6.0 for Windows 98 and probably Windows 2000 too.
// Set tabsize = 3 in your editor.
//
#include "StdAfx.h"
#include "PictCtrl.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
////////////////////////////////////////////////////////////////
// CPictureCtrl is like a static bitmap, but displays any kind of
// image -- BMP, JPG, or GIF.
//
IMPLEMENT_DYNAMIC(CPictureCtrl, CStaticLink)
BEGIN_MESSAGE_MAP(CPictureCtrl, CStaticLink)
ON_WM_CREATE()
ON_WM_PAINT()
ON_WM_ERASEBKGND()
END_MESSAGE_MAP()
CPictureCtrl::CPictureCtrl(BOOL bAutoLoadImage)
: m_bAutoLoadImage(bAutoLoadImage)
{
}
CPictureCtrl::~CPictureCtrl()
{
}
//////////////////
// Created: load picture with same ID as me, if there is one. In theory, this
// should not be required because PreSubclassWindow is called whether the
// control is created directly or subclassed from a dialog--but for some odd
// reason unbeknowst to me, GetDlgCtrlID always returns 0 in OnCreate. Go
// figure.
//
int CPictureCtrl::OnCreate(LPCREATESTRUCT lpcs)
{
if (CStaticLink::OnCreate(lpcs)!=0)
return -1;
int nID = GetDlgCtrlID();
if (m_bAutoLoadImage && nID > 0 && !m_pict) {
LoadImage(nID);
}
return 0;
}
//////////////////
// Subclassed: load picture with same ID as me, if there is one.
//
void CPictureCtrl::PreSubclassWindow()
{
int nID = GetDlgCtrlID();
if (m_bAutoLoadImage && nID > 0 && !m_pict) {
LoadImage(nID);
}
CString s;
SetNoLink(!s.LoadString(GetDlgCtrlID()));
}
//////////////////
// Paint the picture -- override static stuff and do my own thing.
// Call CPicture to to the work.
//
void CPictureCtrl::OnPaint()
{
CPaintDC dc(this);
if (m_pict) {
CRect rcClient;
GetClientRect(&rcClient);
CRect rcImage(CPoint(0,0),m_pict.GetImageSize());
CRect rc;
rc.IntersectRect(&rcImage, &rcClient);
m_pict.Render(&dc, rc);
}
}
//////////////////
// If picture is smaller than client area, paint extra with background color.
//
BOOL CPictureCtrl::OnEraseBkgnd(CDC* pDC)
{
// get client rectangle
CRect rcClient;
GetClientRect(&rcClient);
CRect rc = rcClient;
// get image rectangle
CRect rcImage(CPoint(0,0), m_pict.GetImageSize());
// create clipping region
CRgn clipRgn;
clipRgn.CreateRectRgnIndirect(&rcClient);
pDC->SelectClipRgn(&clipRgn);
pDC->ExcludeClipRect(&rcImage);
CBrush *pBrush =
CBrush::FromHandle((HBRUSH)GetWindowLong(m_hWnd, GCL_HBRBACKGROUND));
pDC->FillRect(&rcClient, pBrush);
pDC->SelectClipRgn(NULL);
return TRUE;
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// MSDN Magazine -- October 2001
// If this code works, it was written by Paul DiLascia.
// If not, I don't know who wrote it.
// Compiles with Visual C++ 6.0 for Windows 98 and probably Windows 2000 too.
// Set tabsize = 3 in your editor.
//
#pragma once
#include <atlbase.h>
//////////////////
// Picture object--encapsulates IPicture
//
class CPicture {
public:
CPicture();
~CPicture();
// Load frm various sosurces
BOOL Load(UINT nIDRes);
BOOL Load(LPCTSTR pszPathName);
BOOL Load(CFile& file);
BOOL Load(CArchive& ar);
BOOL Load(IStream* pstm);
// render to device context
BOOL Render(CDC* pDC, CRect rc=CRect(0,0,0,0),
LPCRECT prcMFBounds=NULL) const;
CSize GetImageSize(CDC* pDC=NULL) const;
operator IPicture*() {
return m_spIPicture;
}
void GetHIMETRICSize(OLE_XSIZE_HIMETRIC& cx, OLE_YSIZE_HIMETRIC& cy) const {
cx = cy = 0;
const_cast<CPicture*>(this)->m_hr = m_spIPicture->get_Width(&cx);
ASSERT(SUCCEEDED(m_hr));
const_cast<CPicture*>(this)->m_hr = m_spIPicture->get_Height(&cy);
ASSERT(SUCCEEDED(m_hr));
}
void Free() {
if (m_spIPicture) {
m_spIPicture.Release();
}
}
protected:
CComQIPtr<IPicture>m_spIPicture; // ATL smart pointer to IPicture
HRESULT m_hr; // last error code
};
-------------------------------------------------------------------------
////////////////////////////////////////////////////////////////
// MSDN Magazine -- October 2001
// If this code works, it was written by Paul DiLascia.
// If not, I don't know who wrote it.
// Compiles with Visual C++ 6.0 for Windows 98 and probably Windows 2000 too.
// Set tabsize = 3 in your editor.
//
#include "StdAfx.h"
#include "Picture.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
////////////////////////////////////////////////////////////////
// CPicture implementation
//
CPicture::CPicture()
{
}
CPicture::~CPicture()
{
}
//////////////////
// Load from resource. Looks for "IMAGE" type.
//
BOOL CPicture::Load(UINT nIDRes)
{
// find resource in resource file
HINSTANCE hInst = AfxGetResourceHandle();
HRSRC hRsrc = ::FindResource(hInst,
MAKEINTRESOURCE(nIDRes),
"IMAGE"); // type
if (!hRsrc)
return FALSE;
// load resource into memory
DWORD len = SizeofResource(hInst, hRsrc);
BYTE* lpRsrc = (BYTE*)LoadResource(hInst, hRsrc);
if (!lpRsrc)
return FALSE;
// create memory file and load it
CMemFile file(lpRsrc, len);
BOOL bRet = Load(file);
FreeResource(hRsrc);
GlobalFree(lpRsrc);
return bRet;
}
//////////////////
// Load from path name.
//
BOOL CPicture::Load(LPCTSTR pszPathName)
{
CFile file;
if (!file.Open(pszPathName, CFile::modeRead|CFile::shareDenyWrite))
return FALSE;
BOOL bRet = Load(file);
file.Close();
return bRet;
}
//////////////////
// Load from CFile
//
BOOL CPicture::Load(CFile& file)
{
CArchive ar(&file, CArchive::load | CArchive::bNoFlushOnDelete);
return Load(ar);
}
//////////////////
// Load from archive--create stream and load from stream.
//
BOOL CPicture::Load(CArchive& ar)
{
CArchiveStream arcstream(&ar);
return Load((IStream*)&arcstream);
}
//////////////////
// Load from stream (IStream). This is the one that really does it: call
// OleLoadPicture to do the work.
//
BOOL CPicture::Load(IStream* pstm)
{
Free();
HRESULT hr = OleLoadPicture(pstm, 0, FALSE,
IID_IPicture, (void**)&m_spIPicture);
ASSERT(SUCCEEDED(hr) && m_spIPicture);
return TRUE;
}
//////////////////
// Render to device context. Covert to HIMETRIC for IPicture.
//
BOOL CPicture::Render(CDC* pDC, CRect rc, LPCRECT prcMFBounds) const
{
ASSERT(pDC);
if (rc.IsRectNull()) {
CSize sz = GetImageSize(pDC);
rc.right = sz.cx;
rc.bottom = sz.cy;
}
long hmWidth,hmHeight; // HIMETRIC units
GetHIMETRICSize(hmWidth, hmHeight);
m_spIPicture->Render(*pDC, rc.left, rc.top, rc.Width(), rc.Height(),
0, hmHeight, hmWidth, -hmHeight, prcMFBounds);
return TRUE;
}
//////////////////
// Get image size in pixels. Converts from HIMETRIC to device coords.
//
CSize CPicture::GetImageSize(CDC* pDC) const
{
if (!m_spIPicture)
return CSize(0,0);
LONG hmWidth, hmHeight; // HIMETRIC units
m_spIPicture->get_Width(&hmWidth);
m_spIPicture->get_Height(&hmHeight);
CSize sz(hmWidth,hmHeight);
if (pDC==NULL) {
CWindowDC dc(NULL);
dc.HIMETRICtoDP(&sz); // convert to pixels
} else {
pDC->HIMETRICtoDP(&sz);
}
return sz;
}
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