C / C++ / MFC

Re: Problem with IPicture-Object and CPictureHolder::Renderpicture

9-Jun-06 0:37

Hi!

I have here a activeX- component "spectrometer.ocx" with the method "getImage(VARIANT *image)".
If a Application call this method, the activeX have to give back a bitmap (which was included in the ressourses). The bitmap have to convers in a VARIANT.

the Method:

<br />
BOOL CSpectrometerCtrl::getImage(VARIANT* image)<br />
{<br />
AFX_MANAGE_STATE(AfxGetStaticModuleState());<br />
<br />
// TODO: Fügen Sie hier Ihren Dispatchhandlercode ein.<br />
<br />
CBitmap bmp ;<br />
VARIANT p1;<br />
PICTDESC desc;<br />
HRESULT hres;<br />
<br />
bmp.LoadBitmap(IDB_BITMAP1);<br />
VariantInit(&p1);<br />
<br />
// setup pictdesc structure<br />
desc.cbSizeofstruct = sizeof(PICTDESC) ;<br />
desc.picType = PICTYPE_BITMAP;<br />
desc.bmp.hbitmap = (HBITMAP)bmp.GetSafeHandle();<br />
IPicture *pd;<br />
<br />
// create the StdPicture object<br />
hres = ::OleCreatePictureIndirect(&desc, IID_IPicture, FALSE,(LPVOID*)&pd);<br />
<br />
<br />
if(SUCCEEDED(hres))<br />
{<br />
p1.vt = VT_UNKNOWN;<br />
p1.punkVal = pd;<br />
<br />
*image = p1;<br />
<br />
return TRUE;<br />
}<br />
else<br />
return FALSE;<br />
}

In my Application i call this method and i want that the bitmap is shown on a dialog.

void CSpectrometerTestDlg::OnBnClickedButton1()<br />
{<br />
// TODO: Fügen Sie hier Ihren Kontrollbehandlungscode für die Benachrichtigung ein.<br />
<br />
VARIANT imageData;<br />
IUnknown* pUnk;<br />
IPicture *pPicture= 0;<br />
long lWidth, lHeight;<br />
int iWidth, iHeight;<br />
<br />
CClientDC pDC(this);<br />
<br />
CDC memdc;<br />
memdc.CreateCompatibleDC(&pDC);<br />
<br />
VariantInit(&imageData);<br />
m_mySpectrometer.getImage(&imageData);<br />
<br />
pUnk = imageData.punkVal;<br />
HRESULT hr = pUnk->QueryInterface(&pPicture);<br />
<br />
if(SUCCEEDED(hr))<br />
{<br />
//breite u. höhe vom bild holen<br />
pPicture->get_Width(&lWidth);<br />
pPicture->get_Height(&lHeight);<br />
<br />
//in Pixel konvertieren<br />
iWidth = (lWidth * GetDeviceCaps(pDC, LOGPIXELSX)) / 2540;<br />
iHeight = (lHeight * GetDeviceCaps(pDC, LOGPIXELSY)) / 2540;<br />
<br />
//Bild anzeigen mittels Render<br />
pPicture->Render(pDC, 0, 0, iWidth, iHeight, 0, lHeight, lWidth, -lHeight, 0);<br />
<br />
////// VERSUCH ÜBER DER Ausgabe über die CBitmap Klasse//////////////////////////<br />
//HBITMAP hBmp ;<br />
//pPicture->get_Handle((OLE_HANDLE FAR *) &hBmp);<br />
<br />
//// create a temporary bitmap<br />
//CBitmap * TempBmp = CBitmap::FromHandle(hBmp);<br />
<br />
//memdc.SelectObject(TempBmp);//select original bitmap<br />
<br />
//pDC.BitBlt(200, 300, iWidth, iHeight, &memdc, 0, 0, SRCCOPY);<br />
/////////////////////////////////////////////////////////////////////////////////<br />
}<br />
<br />
}

The variables "iWidth, iHeight" have already the right values. It means that something comes on but the displaying doesn't work.

Is there someone with a Idea? What is wrong?

Thanks

-- modified at 6:50 Friday 9th June, 2006

Hamid_RT9-Jun-06 0:50

9-Jun-06 0:50

Do you have one handle bitmap (of course is valid)?

whitesky

masanne9-Jun-06 0:55

9-Jun-06 0:55

Sorry, What do you mean?

-- modified at 6:56 Friday 9th June, 2006

Hamid_RT9-Jun-06 1:10

9-Jun-06 1:10

maybe your handle isnt valid or its null

whitesky

masanne9-Jun-06 1:20

9-Jun-06 1:20

I think not because in my Application the values iHeight and iWidth of the bitmap are right. that means for me, that the handle "desc.bmp.hbitmap = (HBITMAP)bmp.GetSafeHandle();" is valid.

Hamid_RT9-Jun-06 2:18

Re: Problem with IPicture-Object and Render [modified]

9-Jun-06 2:18

yes you have one handle hbitmap (desc.bmp.hbitmap ) but in OnBnClickedButton1
i think(not sure)you dont have one valid handle pPicture->get_Handle((OLE_HANDLE FAR *) &hBmp);
what size(parametes) from hBmp GetObject(hBmp,sizeof(bm),&bm);

whitesky

masanne9-Jun-06 2:49

Re: Problem with IPicture-Object and Render [modified]

9-Jun-06 2:49

	pPicture->get_Handle((OLE_HANDLE FAR *) &hBmp);<br />
<br />
<br />
		if (hBmp)  <br />
		{  		<br />
                        MesssageBox("it exists");<br />
		}

After "if" it comes the MesssageBox .

But if i do the follow:

if(GetObject(hBmp,sizeof(BMP), &BMP)==0) MessageBox("0 bytes");

it comes the MessageBox also.

Is the hBMP valid or not?

-- modified at 9:00 Friday 9th June, 2006

masanne9-Jun-06 3:00

9-Jun-06 3:00

And why work the follow code:

pPicture->get_Width(&lWidth);<br />
    pPicture->get_Height(&lHeight);

Width and Height are correct . the same size of the original bitmap.

But

pPicture->get_Width(&lWidth);<br />
		pPicture->get_Height(&lHeight);

is not valid.

I not understand

Hamid_RT9-Jun-06 3:22

9-Jun-06 3:22

Dear masanne,
its not way but usually i test hbitmap with this
if you run this code in getImage for bmp then you get one file in drive c

<br />
CImage m_Image;<br />
m_Image.Attach(hBmp);<br />
m_Image.Save("c:\\test.bmp");<br />
m_Image.Detach();<br />

but if you run this code in OnBnClickedButton1
/*pPicture->get_Handle((OLE_HANDLE FAR *) &hBmp);*/for hBmp you get one error
can you test this code and answer to me,please? of course include atlImage.h

whitesky

masanne9-Jun-06 3:55

9-Jun-06 3:55

If include this code in GetImage()-Methode , it happens nothing
(no File under the path " C:\work\test\test.bmp".

HBITMAP hBmp = (HBITMAP)bmp.GetSafeHandle();<br />
CImage m_Image;<br />
m_Image.Attach(hBmp);<br />
m_Image.Save("C:\work\test\test.bmp");<br />
m_Image.Detach();

And if i include the follow code in the Application under OnBnClickedButton1

pPicture->get_Handle((OLE_HANDLE FAR *) &hBmp);<br />
<br />
<br />
CImage m_Image;<br />
m_Image.Attach(hBmp);<br />
m_Image.Save("C:\work\test\test.bmp");<br />
m_Image.Detach();

it happens nothing
(no File under the path " C:\work\test\test.bmp") and it comes to a error.

Hamid_RT9-Jun-06 6:43

9-Jun-06 6:43

yes you get one error nBytes==Sizeof....
and if you use GetObject you cant get width and height and i think my guess is true (i hope)you dont have one handle bitmap.See here

<br />
CBitmap bmp ;<br />
PICTDESC desc;<br />
<br />
long lWidth, lHeight;<br />
int iWidth, iHeight;<br />
<br />
HBITMAP hbit=(HBITMAP)LoadImage(AfxGetApp()->m_hInstance,"c:\\0.bmp",IMAGE_BITMAP, 0,0,LR_LOADFROMFILE);<br />
bmp.Attach(hbit);<br />
<br />
// setup pictdesc structure<br />
desc.cbSizeofstruct = sizeof(PICTDESC) ;<br />
desc.picType = PICTYPE_BITMAP;<br />
desc.bmp.hbitmap = (HBITMAP)bmp.GetSafeHandle();<br />
IPicture *pd;<br />
<br />
::OleCreatePictureIndirect(&desc, IID_IPicture, FALSE,(LPVOID*)&pd);<br />
<br />
pd->get_Width(&lWidth);<br />
pd->get_Height(&lHeight);<br />
<br />
iWidth = (lWidth * GetDeviceCaps(GetDC()->m_hDC, LOGPIXELSX)) / 2540;<br />
iHeight = (lHeight * GetDeviceCaps(GetDC()->m_hDC, LOGPIXELSY)) / 2540;<br />
	CRect	Rect(0,0,iWidth,iHeight);<br />
<br />
	pd->Render(GetDC()->m_hDC,0,0, <br />
                      Rect.right - Rect.left,<br />
                      Rect.bottom - Rect.top,<br />
                      0,lHeight,<br />
                      lWidth,-lHeight,<br />
                      &Rect);<br />

maybe it is some helpful to you

whitesky

masanne15-Jun-06 23:11

Doubt regarding the combo box

15-Jun-06 23:11

Thats it! Thank u very much!

<br />
VARIANT_BOOL CGetImageCtrl::getImage(VARIANT* image)<br />
{<br />
	AFX_MANAGE_STATE(AfxGetStaticModuleState());<br />
<br />
	// TODO: Fügen Sie hier Ihren Dispatchhandlercode ein.<br />
<br />
	//CBitmap bmp ; // bmp --> global<br />
	VARIANT p1;<br />
	PICTDESC desc;<br />
	HRESULT hres;<br />
<br />
	bmp.LoadBitmap(IDB_BITMAP1);// bmp --> global<br />
	VariantInit(&p1);<br />
<br />
	// setup pictdesc structure<br />
	desc.cbSizeofstruct = sizeof(PICTDESC) ;<br />
	desc.picType = PICTYPE_BITMAP;<br />
	desc.bmp.hbitmap = (HBITMAP)bmp.GetSafeHandle();<br />
<br />
	IPicture *pd;<br />
<br />
	// create the StdPicture object<br />
	hres = ::OleCreatePictureIndirect(&desc, IID_IPicture, FALSE,(LPVOID*)&pd);<br />
<br />
          <br />
	<br />
	if(SUCCEEDED(hres))<br />
    {<br />
		p1.vt = VT_UNKNOWN;<br />
		p1.punkVal = pd;<br />
<br />
		*image = p1;<br />
    }<br />
<br />
	return VARIANT_TRUE;<br />
}

/////////////////////////////////////////////////////////////////////////7

<br />
void CGetImageTestDlg::OnBnClickedButton1()<br />
{<br />
	// TODO: Fügen Sie hier Ihren Kontrollbehandlungscode für die Benachrichtigung ein.<br />
<br />
<br />
	VARIANT image;<br />
	IUnknown* pUnk;<br />
	IPicture *pPicture= 0;<br />
	long lWidth, lHeight;<br />
	int iWidth, iHeight;<br />
<br />
	//CClientDC pDC(this);<br />
<br />
	//CDC memdc;<br />
	//memdc.CreateCompatibleDC(&pDC);<br />
	<br />
	VariantInit(&image);<br />
	m_myGetImage.getImage(&image);<br />
	<br />
	pUnk = image.punkVal;<br />
	HRESULT hr = pUnk->QueryInterface(&pPicture);<br />
<br />
	if(SUCCEEDED(hr))<br />
	{		<br />
		//breite u. höhe vom bild holen<br />
		pPicture->get_Width(&lWidth);<br />
		pPicture->get_Height(&lHeight);<br />
<br />
		//in Pixel konvertieren<br />
		iWidth  = (lWidth  * GetDeviceCaps(GetDC()->m_hDC, LOGPIXELSX)) / 2540;<br />
		iHeight = (lHeight * GetDeviceCaps(GetDC()->m_hDC, LOGPIXELSY)) / 2540;<br />
<br />
		CRect Rect(0,0,iWidth,iHeight);<br />
		<br />
		//Bild anzeigen mittels Render<br />
		pPicture->Render(GetDC()->m_hDC,0,0,Rect.right - Rect.left,Rect.bottom - Rect.top,0,lHeight,lWidth,-lHeight,&Rect);<br />
<br />
	}<br />
	else MessageBox("The Displaying of the Image is not possible!");<br />
<br />
}<br />

Member 30398439-Jun-06 0:27

Member 3039843

9-Jun-06 0:27

How can i make the combo box to drop down automatically?

_AnsHUMAN_ 9-Jun-06 0:34

_AnsHUMAN_

9-Jun-06 0:34

m_combobox.SendMessage(CB_SHOWDROPDOWN ,(WPARAM)true,0);

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Jesal Rana9-Jun-06 0:37

Jesal Rana

9-Jun-06 0:37

Just follow the method below u will get ur rsult.

Right click on the combo box;

Select ‘Properties’ from the list displayed. This will open the ‘Properties’ window;

Click on ‘Event’ tab and place your cursor next to the ‘On Got Focus’ event;

Then, click on the ‘…’ button;

Select ‘Code Builder’ from the code builder window and click on OK.

The following Subprocedure will be created:

Private Sub Combo2_GotFocus()

End Sub

You can also call the function on Event of Mouse Move.

OK

_AnsHUMAN_ 9-Jun-06 0:43

_AnsHUMAN_

9-Jun-06 0:43

alternatively you can also use
m_combobox.ShowDropDown();

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Laxman Auti9-Jun-06 0:47

Laxman Auti

9-Jun-06 0:47

_AnShUmAn_ wrote:
alternatively you can also use
m_combobox.ShowDropDown();

// Show the dropdown list box if it is not already dropped.
if (!pmyComboBox->GetDroppedState())
  pmyComboBox->ShowDropDown(TRUE);

Knock out 't' from can't,
You can if you think you can
Cool | :cool: