C / C++ / MFC

Re: Error in application when computer change

15-Apr-08 8:43

Iain Clarke wrote:
Can you compile / link your program statically, so that all the dephi stuff and your code end up in a big exe?

That's the default setting (or used to be).

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Jim Crafton15-Apr-08 8:45

ImageList, Listbox and single bitmap palette

15-Apr-08 8:45

I suspect the problem is in your threading code, and that you're not seeing it because you are running on a single core and the multi-threading is not being "exercised" in the same way that it is on a true SMP system like the Core Duo. More importantly few people are going to be able to help you here because your code is in Delphi, not C++, and not alot of people here are very familiar with it. Check out the Borland forums, and do some serious code review on your multi threaded code.

JG53_Jaguar15-Apr-08 3:13

15-Apr-08 3:13

Hi All,

I need your help guys. I'm trying to implement a custom list box that will only have images, the images are 50 x 62 pixes 32bit. The thing is that, all the images that I want to display are all stored on single bitmap. This bitmap is quite large, has about 300 of the images and the bitmap file is loaded during the run time. I have the bitmap already loaded in memory and I use other elements from the bitmap file to draw on the screen. I know the coordinates of each image on the bitmap that I would like to load into my List box. I'm just not sure how create an Imagelist and display it in the List box.

Any help would be much appreciated!

Thank You!

led mike15-Apr-08 4:28

led mike

15-Apr-08 4:28

JG53_Jaguar wrote:
and I use other elements from the bitmap file to draw on the screen.

I have never done that but I would believe using that same approach you can create an image object for each one and add it to an image list.

led mike

JG53_Jaguar15-Apr-08 5:00

15-Apr-08 5:00

that's what I have been thinking as well...might have to create a small bitmap and just dump one image into it at the time and then add it to the list before moving on to next one...

Re: ImageList, Listbox and single bitmap palette [modified]

Hamid_RT15-Apr-08 4:33

Hamid_RT

15-Apr-08 4:33

Why you dont use of CListCtrl?

JG53_Jaguar15-Apr-08 4:40

15-Apr-08 4:40

I don't see CListCtrl being any different, the challenge is assigning the specific regions of the bitmap and assign it to each element in the ImageList that's the challenge for me...

modified on Tuesday, April 15, 2008 10:49 AM

led mike15-Apr-08 5:39

led mike

15-Apr-08 5:39

JG53_Jaguar wrote:
I don't see CListCtrl being any different

Correct, it's not.

led mike

Iain Clarke, Warrior Programmer

Iain Clarke, Warrior Programmer15-Apr-08 5:38

15-Apr-08 5:38

You can either break the bitmap into bits and get windows to handle it, or you do do owner draw, and just plot different parts of the bitmap. You already know how to draw bits on the screen, so it won't be much harder.

There should be plenty of owner draw examples on CP, and even some simple ones (which is all you're after) on MSDN.

Iain.

Iain Clarke appears because ^CPallini still cares.

JG53_Jaguar15-Apr-08 6:27

How to distinguish between VISTA and XP by using a registry key?

15-Apr-08 6:27

Thanks Ian, I will look into it...I want to keep things as simple as possible. So I will try first assigning the bitmap bits to a bitmap for the imagelist one at the time first and see how that goes.

TalSt15-Apr-08 3:12

TalSt

15-Apr-08 3:12

Hello,

Do you know any registry key that says which Operating System we are using?

Thanks! D'Oh! | :doh:

Re: How to distinguish between VISTA and XP by using a registry key?

JudyL_MD15-Apr-08 5:27

JudyL_MD

15-Apr-08 5:27

Why bother reading the registry when there is an API call that retrieves that information? GetVersionEx[^]

Judy

Re: How to distinguish between VISTA and XP by using a registry key?

TalSt15-Apr-08 19:28

TalSt

15-Apr-08 19:28

Thanks!!!

MFC Application in Different Resolution

mehmetned15-Apr-08 3:05

mehmetned

15-Apr-08 3:05

I have a mfc application that i run with different resolution. So i want to change size of controls as resolutions rate.
When the resolution increases, size of controls and font must increase with same rate between new and old resolution. please tell me how to make it simply. Thanks Smile | :)

Re: MFC Application in Different Resolution

Hamid_RT15-Apr-08 3:44

Hamid_RT

15-Apr-08 3:44

You can use of WM_SIZE and MoveWindow or SetWindowPos.

Re: MFC Application in Different Resolution

Iain Clarke, Warrior Programmer15-Apr-08 5:41

Iain Clarke, Warrior Programmer

15-Apr-08 5:41

There are loads of articles on codeproject that relate to this.

They're aimed at windows that change size as the user drags the edges with the mouse, but that's no different in principle.

If you mean the dpi changes, then you can MapDialogRect to make your app like a dialog box, and change size proportional to DPI.

Iain.

Iain Clarke appears because ^CPallini still cares.

Why do IWebBrowser2::Navigate2 return E_FAIL?

Johann Gerell15-Apr-08 3:01

Johann Gerell

15-Apr-08 3:01

Couldn't get any input from the "Mobile Development" board, so now I turn to the COM giants here Roll eyes | :rolleyes:

The docs on this are sparse, to say the least...

My problem: I'm trying to embed a WebBrowser object in a Windows Mobile application. I can create it and query its size and window handle, but IWebBrowser2::Navigate2 fails with E_FAIL.

Can anyone give me any hints to why it fails?

Code (yes, C++):

My host control is declared like this:

class HtmlControl : public Window // Window wraps an HWND.
{
public:
	HtmlControl(HWND window)
	: Window(window)
	, iOleObject_(NULL)
	{
		iOleSite_.host = this;
		iOleFrame_.host = this;
		CreateWebControl();
	}

	Site iOleSite_;
	Frame iOleFrame_;
	IOleObject* iOleObject_;              // The WeBrowser object.

private:
	void CreateWebControl();
};

Where Site and Frame are declared like this:

struct Site : public IOleClientSite,
              public IOleInPlaceSite
{
	HtmlControl* host;

	// IUnknown
	STDMETHODIMP QueryInterface(REFIID riid, void** ppvObject);
	STDMETHODIMP_(ULONG) AddRef();
	STDMETHODIMP_(ULONG) Release();
	
	// IOleClientSite
	STDMETHODIMP SaveObject();
	STDMETHODIMP GetMoniker(DWORD dwAssign, DWORD dwWhichMoniker,
	                        IMoniker** ppmk);
	STDMETHODIMP GetContainer(LPOLECONTAINER FAR* ppContainer);
	STDMETHODIMP ShowObject();
	STDMETHODIMP OnShowWindow(BOOL fShow);
	STDMETHODIMP RequestNewObjectLayout();
	
	// IOleWindow
	STDMETHODIMP GetWindow(HWND FAR* lphwnd);
	STDMETHODIMP ContextSensitiveHelp(BOOL fEnterMode);
	
	// IOleInPlaceSite methods
	STDMETHODIMP CanInPlaceActivate();
	STDMETHODIMP OnInPlaceActivate();
	STDMETHODIMP OnUIActivate();
	STDMETHODIMP GetWindowContext(LPOLEINPLACEFRAME FAR* lplpFrame,
	                              LPOLEINPLACEUIWINDOW FAR* lplpDoc,
	                              LPRECT lprcPosRect,
	                              LPRECT lprcClipRect,
	                              LPOLEINPLACEFRAMEINFO lpFrameInfo);
	STDMETHODIMP Scroll(SIZE scrollExtent);
	STDMETHODIMP OnUIDeactivate(BOOL fUndoable);
	STDMETHODIMP OnInPlaceDeactivate();
	STDMETHODIMP DiscardUndoState();
	STDMETHODIMP DeactivateAndUndo();
	STDMETHODIMP OnPosRectChange(LPCRECT lprcPosRect);
};

struct Frame : public IOleInPlaceFrame
{
	HtmlControl* host;

	// IUnknown
	STDMETHODIMP QueryInterface(REFIID riid, void** ppvObject);
	STDMETHODIMP_(ULONG) AddRef();
	STDMETHODIMP_(ULONG) Release();
	
	// IOleWindow
	STDMETHODIMP GetWindow(HWND FAR* lphwnd);
	STDMETHODIMP ContextSensitiveHelp(BOOL fEnterMode);
	
	// IOleInPlaceUIWindow
	STDMETHODIMP GetBorder(LPRECT lprectBorder);
	STDMETHODIMP RequestBorderSpace(LPCBORDERWIDTHS pborderwidths);
	STDMETHODIMP SetBorderSpace(LPCBORDERWIDTHS pborderwidths);
	STDMETHODIMP SetActiveObject(IOleInPlaceActiveObject* pActiveObject,
	                             LPCOLESTR pszObjName);
	
	// IOleInPlaceFrame
	STDMETHODIMP InsertMenus(HMENU hmenuShared,
	                         LPOLEMENUGROUPWIDTHS lpMenuWidths);
	STDMETHODIMP SetMenu(HMENU hmenuShared, HOLEMENU holemenu,
	                     HWND hwndActiveObject);
	STDMETHODIMP RemoveMenus(HMENU hmenuShared);
	STDMETHODIMP SetStatusText(LPCOLESTR pszStatusText);
	STDMETHODIMP EnableModeless(BOOL fEnable);
	STDMETHODIMP TranslateAccelerator(LPMSG lpmsg, WORD wID);
};

The implementations of Site and Frame will be provided if needed, so that this space isn't cluttered too much.

So, the interesting function here is HtmlControl::CreateWebControl(). Let's walk it through, so that the possible strangeness of the IWebBrowser2::Navigate2 failure can be better seen.

First, an instance of the WebBrowser COM object is created and its associated IOleObject is retrieved:

IUnknown* iUnknown = NULL;
HRESULT hr = ::CoCreateInstance(CLSID_WebBrowser,
                                NULL,
                                CLSCTX_INPROC_SERVER | CLSCTX_INPROC_HANDLER,
                                IID_IUnknown,
                                (void*)(&iUnknown));
VERIFY(SUCCEEDED(hr));

hr = iUnknown->QueryInterface(IID_IOleObject, (void*)(&iOleObject_));
VERIFY(SUCCEEDED(hr));

These operations were all successful in the sense that hr == S_OK.

After getting the WebControl object, I want to show/activate it using our IOleClientSite implementation:

hr = iOleObject_->SetClientSite(&iOleSite_);
VERIFY(SUCCEEDED(hr));

const RECT rect = GetClientRect();
hr = iOleObject_->DoVerb(OLEIVERB_SHOW, NULL, &iOleSite_, 0, GetHwnd(), &rect);
VERIFY(SUCCEEDED(hr));

These operations were also successful in the sense that hr == S_OK. However, the end result (the IWebBrowser2::Navigate2 failure) occurs also if OLEIVERB_SHOW is changed to OLEIVERB_UIACTIVATE or OLEIVERB_INPLACEACTIVATE.

Next, I dig the IWebBrowser2 out of the WebControl object and checks if the browser HWND is sane:

IWebBrowser2* iWebBrowser = NULL;
hr = iOleObject_->QueryInterface(IID_IWebBrowser2, (void**)&iWebBrowser);
VERIFY(SUCCEEDED(hr));

// Get browser HWND, method	1.
HWND hwndBrowser = NULL;
hr = iWebBrowser->get_HWND((long*)&hwndBrowser);
VERIFY(SUCCEEDED(hr));
VERIFY(hwndBrowser != NULL);
VERIFY(::GetParent(hwndBrowser) == GetHwnd());

// Get browser HWND, method	2.
IOleWindow* iOleWindow = NULL;
hr = iOleObject_->QueryInterface(IID_IOleWindow, (void*)(&iOleWindow));
VERIFY(SUCCEEDED(hr));

hwndBrowser = NULL;
hr = iOleWindow->GetWindow(&hwndBrowser);
VERIFY(hwndBrowser != NULL);
VERIFY(::GetParent(hwndBrowser) == GetHwnd());

Again, these operations were successful in the sense that hr == S_OK. Also, the browser HWND is equal in both method 1 and 2 and its parent is indeed our host control. I see this as some kind of indication that something works.

But... the thing I need doesn't work; the precious IWebBrowser2::Navigate2:

VARIANT vURL;
vURL.vt = VT_BSTR;
vURL.bstrVal = ::SysAllocString(L"about:blank");

VARIANT vEmpty;
vEmpty.vt = VT_EMPTY;

hr = iWebBrowser->Navigate2(&vURL, &vEmpty, &vEmpty, &vEmpty, &vEmpty);
VERIFY(SUCCEEDED(hr));

Now I get hr == E_FAIL.

I cannot really see the problem, since everything up to this point worked successfully, and the last call seems trivial.

Is anyone still around all the way down here with some guess as to what might be going on?

Thanks for any input!

--
Time you enjoy wasting is not wasted time - Bertrand Russel

Re: Why do IWebBrowser2::Navigate2 return E_FAIL?

Jim Crafton15-Apr-08 8:49

Re: Why do IWebBrowser2::Navigate2 return E_FAIL?

15-Apr-08 8:49

There's a article here on how to host the web browser via C code and the author does an *EXCELLENT* job of walking you through exactly what has to happen - try and look for that, maybe it will off you hints as to what's missing.

Jim Crafton15-Apr-08 8:56