screen show and print : difference [MFC]

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From: sgliu on 4 May 2008 23:27

��IPicture�ӿ��Ļ��ʾJPGͼƬ,��IPicture::Render��ʾͼƬ��ĳһ��,��ʾ��.
��ʾ��͸��ӡ��ӡ.�ɴ�ӡ��ʾ��кܴ��,��Ϊ:��ӡ�Ĳ��ֺ��ʾ��Լ��С��Ǻ�,
�Ҹ��ô��?
��Ҫ��ӡ��Ļ��ʾ��.
лл.

��:
void CPrintMAP2View::OnDraw(CDC* pDC)
{
CPrintMAP2Doc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
if (!pDoc)
return;

double lon=105.0;
double lat=35.0;
double mag=5.0;
draw("",pDC,lon,lat,mag);
}
.... ...

bool CPrintMAP2View::draw(char* sfn,CDC* pDC,double& lon,double& lat,double&
mag)
{
IStream *pStm;
CFileStatus fstatus;
CFile file;
LONG cb;
CString m_Path("map\\china.bmp");
if (file.Open(m_Path,CFile::modeRead)&&file.GetStatus(m_Path,fstatus)&&
((cb = static_cast<LONG>(fstatus.m_size)) != -1))
{
HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, cb);
LPVOID pvData = NULL;
if (hGlobal != NULL)
{
if ((pvData = GlobalLock(hGlobal)) != NULL)
{
file.Read(pvData, cb);
GlobalUnlock(hGlobal);
CreateStreamOnHGlobal(hGlobal, TRUE, &pStm);
}
}
}
file.Close();

IPicture *pPic;
if(SUCCEEDED(OleLoadPicture(pStm,static_cast<LONG>(fstatus.m_size),TRUE,IID_IPicture,(LPVOID*)&pPic))) { OLE_XSIZE_HIMETRIC hmWidth; OLE_YSIZE_HIMETRIC hmHeight; pPic->get_Width(&hmWidth); //�� λ0.01�� pPic->get_Height(&hmHeight); //�߶� ��λ0.01�� double fX,fY; fX = pDC->GetDeviceCaps(HORZRES); //��ʾ��ȣ��أ� fY = pDC->GetDeviceCaps(VERTRES); //��ʾ�߶ȣ��أ� CSize size(hmWidth,hmHeight); pDC->HIMETRICtoLP(&size); // ת��MM_HIMETRICģʽ��λΪMM_TEXT��ص�λ CSize lefttop( LEFTSPACE , TOPSPACE ); pDC->LPtoHIMETRIC(&lefttop); CSize inlen( MAPLEN - LEFTSPACE - RIGHTSPACE , MAPWIDTH - TOPSPACE -BOTTOMSPACE ); pDC->LPtoHIMETRIC(&inlen); double lonspan = RIGHTLON - LEFTLON ; double latspan = TOPLAT - BOTTOMLAT ; double perlon = inlen.cx/lonspan; double perlat = inlen.cy/latspan; OLE_XPOS_HIMETRIC x0 = static_cast<OLE_XPOS_HIMETRIC>(( lon - LEFTLON ) *perlon + lefttop.cx); OLE_XPOS_HIMETRIC y0 = ( TOPLAT - lat ) * perlat + lefttop.cy; OLE_XPOS_HIMETRIC temx=3049; CSize epic(temx,y0); pDC->LPtoHIMETRIC(&epic); y0=epic.cy; //��ӡ�� OLE_XPOS_HIMETRIC x1 = x0 - perlon * 3; //��ʼ��X OLE_XPOS_HIMETRIC y1 = y0 - perlat * 2; //��ʼ��Y OLE_XPOS_HIMETRIC xlen = 6 * perlon; //��ȷ�Χ OLE_XPOS_HIMETRIC ylen = 4 * perlat; //��γ�ȷ�Χ if(FAILED(pPic->Render(pDC->m_hDC,100,100,fX-200,fY-200,x1,hmHeight-y1,xlen,-ylen,NULL))) AfxMessageBox("��Ⱦͼ��ʧ�ܣ�"); //================================================================= // ��У��й̶�Ϊ�� int radius; if(mag < 4) radius = 10; else if(mag < 6) radius = 15; else if(mag < 7) radius = 20; else radius = 25; CBrush currbrush(RGB(255,0,0)); CBrush* pOldbrush=pDC->SelectObject(&currbrush); pDC->Ellipse(fX/2-radius,fY/2-radius,fX/2+radius,fY/2+radius); pDC->SelectObject(pOldbrush); //================================================================= pPic->Release(); } else AfxMessageBox("��װ��ͼ��ʧ�ܣ�"); return true;}

From: Joseph M. Newcomer on 5 May 2008 02:22

Your message has been fairly badly trashed. There isn't much to say here.
joe

On Mon, 5 May 2008 11:27:16 +0800, "sgliu" <sgliu(a)eq-he.ac.cn> wrote:

>��IPicture�ӿ��Ļ��ʾJPGͼƬ,��IPicture::Render��ʾͼƬ��ĳһ��,��ʾ��.
>��ʾ��͸��ӡ��ӡ.�ɴ�ӡ��ʾ��кܴ��,��Ϊ:��ӡ�Ĳ��ֺ��ʾ��Լ��С��Ǻ�,
>�Ҹ��ô��?
>��Ҫ��ӡ��Ļ��ʾ��.
>лл.
>
>��:
>void CPrintMAP2View::OnDraw(CDC* pDC)
>{
> CPrintMAP2Doc* pDoc = GetDocument();
> ASSERT_VALID(pDoc);
> if (!pDoc)
> return;
>
> double lon=105.0;
> double lat=35.0;
> double mag=5.0;
> draw("",pDC,lon,lat,mag);
>}
>... ...
>
>bool CPrintMAP2View::draw(char* sfn,CDC* pDC,double& lon,double& lat,double&
>mag)
>{
> IStream *pStm;
> CFileStatus fstatus;
> CFile file;
> LONG cb;
> CString m_Path("map\\china.bmp");
> if (file.Open(m_Path,CFile::modeRead)&&file.GetStatus(m_Path,fstatus)&&
>((cb = static_cast<LONG>(fstatus.m_size)) != -1))
> {
> HGLOBAL hGlobal = GlobalAlloc(GMEM_MOVEABLE, cb);
> LPVOID pvData = NULL;
> if (hGlobal != NULL)
> {
> if ((pvData = GlobalLock(hGlobal)) != NULL)
> {
> file.Read(pvData, cb);
> GlobalUnlock(hGlobal);
> CreateStreamOnHGlobal(hGlobal, TRUE, &pStm);
> }
> }
> }
> file.Close();
>
> IPicture *pPic;
> if(SUCCEEDED(OleLoadPicture(pStm,static_cast<LONG>(fstatus.m_size),TRUE,IID_IPicture,(LPVOID*)&pPic))) { OLE_XSIZE_HIMETRIC hmWidth; OLE_YSIZE_HIMETRIC hmHeight; pPic->get_Width(&hmWidth); //�� λ0.01�� pPic->get_Height(&hmHeight); //�߶� ��λ0.01�� double fX,fY; fX = pDC->GetDeviceCaps(HORZRES); //��ʾ��ȣ��أ� fY = pDC->GetDeviceCaps(VERTRES); //��ʾ�߶ȣ��أ� CSize size(hmWidth,hmHeight); pDC->HIMETRICtoLP(&size); // ת��MM_HIMETRICģʽ��λΪMM_TEXT��ص�λ CSize lefttop( LEFTSPACE , TOPSPACE ); pDC->LPtoHIMETRIC(&lefttop); CSize inlen( MAPLEN - LEFTSPACE - RIGHTSPACE , MAPWIDTH - TOPSPACE -BOTTOMSPACE ); pDC->LPtoHIMETRIC(&inlen); double lonspan = RIGHTLON - LEFTLON ; double latspan = TOPLAT - BOTTOMLAT ; double perlon = inlen.cx/lonspan; double perlat = inlen.cy/latspan; OLE_XPOS_HIMETRIC x0 = static_cast<OLE_XPOS_HIMETRIC>(( lon - LEFTLON ) *perlon + lefttop.cx); OLE_XPOS_HIMETRIC y0 = ( TOPLAT - lat ) * perlat + lefttop.cy;
>OLE_XPOS_HIMETRIC temx=3049; CSize epic(temx,y0); pDC->LPtoHIMETRIC(&epic); y0=epic.cy; //��ӡ�� OLE_XPOS_HIMETRIC x1 = x0 - perlon * 3; //��ʼ��X OLE_XPOS_HIMETRIC y1 = y0 - perlat * 2; //��ʼ��Y OLE_XPOS_HIMETRIC xlen = 6 * perlon; //��ȷ�Χ OLE_XPOS_HIMETRIC ylen = 4 * perlat; //��γ�ȷ�Χ if(FAILED(pPic->Render(pDC->m_hDC,100,100,fX-200,fY-200,x1,hmHeight-y1,xlen,-ylen,NULL))) AfxMessageBox("��Ⱦͼ��ʧ�ܣ�"); //================================================================= // ��У��й̶�Ϊ�� int radius; if(mag < 4) radius = 10; else if(mag < 6) radius = 15; else if(mag < 7) radius = 20; else radius = 25; CBrush currbrush(RGB(255,0,0)); CBrush* pOldbrush=pDC->SelectObject(&currbrush); pDC->Ellipse(fX/2-radius,fY/2-radius,fX/2+radius,fY/2+radius); pDC->SelectObject(pOldbrush); //================================================================= pPic->Release(); } else AfxMessageBox("��װ��ͼ��ʧ�ܣ�"); return
>true;}
Joseph M. Newcomer [MVP]
email: newcomer(a)flounder.com
Web: http://www.flounder.com
MVP Tips: http://www.flounder.com/mvp_tips.htm

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