C / C++ / MFC

ThatsAlok15-Mar-07 1:35

ThatsAlok

15-Mar-07 1:35

Sydes wrote:

I want to translate the mouse coords to a global hit test result which will hopefully give me the window handle that the mouse is over and if possible, if I am over the title bar/menu/status bar etc.

GetCursorPos and GetForegroundWindow

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
Global Interface Table: An Easy Way to Marshal an Interface Pointer[new]
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

Sydes15-Mar-07 1:41

Sydes

15-Mar-07 1:41

Cheers for the advice.

http://www.asura.co.uk

Parthi_Appu15-Mar-07 1:39

Parthi_Appu

15-Mar-07 1:39

Sydes wrote:
translate the mouse coords to a global hit test result which will hopefully give me the window handle that the mouse is over

First capture all the mouse events using,
SetCapture() API.

While MouseMouse use the,
WindowFromPoint(..) API to find the window under the mouse cursor.

Sydes wrote:
if possible, if I am over the title bar/menu/status bar etc.

If the window is valid, then send WM_NCHITTEST message to the window, to find out the area in that window.

Hope i understood your question..

Do your Duty and Don't expect the Result

Sydes15-Mar-07 1:41

Sydes

15-Mar-07 1:41

Thanks that was very helpful. Smile | :)

http://www.asura.co.uk

Mouse move

deeps_cute15-Mar-07 1:23

deeps_cute

15-Mar-07 1:23

hi i have to change the image of the button when we move mouse on it or clicked. i cant understand OnMouseMove function. can anyone help me pls.

Arise Awake Stop Not Till ur Goal is Reached.

_AnsHUMAN_ 15-Mar-07 1:27

_AnsHUMAN_

15-Mar-07 1:27

See here[^].

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

_AnShUmAn_

CPallini15-Mar-07 1:29

CPallini

15-Mar-07 1:29

Well, What don't you undestand?

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

deeps_cute15-Mar-07 1:35

deeps_cute

15-Mar-07 1:35

i had seen some sample codes with onmousemove. whats the purpose of invalidate() how to change the icon in the button? i cant understand what we are doing in drawitem

Arise Awake Stop Not Till ur Goal is Reached.

prasad_som15-Mar-07 2:06

prasad_som

15-Mar-07 2:06

deeps_cute wrote:
whats the purpose of invalidate() how to change the icon in the button? i cant understand what we are doing in drawitem

You will find all these things in MSDN.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Mike Dimmick15-Mar-07 3:03

Mike Dimmick

15-Mar-07 3:03

I recommend reading "Programming Windows, Fifth Edition" by Charles Petzold.

Invalidate is used to inform Windows that the window needs redrawing. When the thread's input queue is otherwise idle, Windows will generate a WM_PAINT message for any window that has an invalid region. This has two effects: it centralises all painting in the WM_PAINT handler, and it defers painting until all the user's input has been processed. To inform Windows that an area of the window needs repainting, use InvalidateRect or InvalidateRgn. Multiple calls to InvalidateRect or InvalidateRgn build up an invalid region.

In your WM_PAINT handler, you can find out from the device context which areas of the window are invalid and hence need repainting. The PAINTSTRUCT returned by BeginPaint (from MFC, the CPaintDC's m_ps member) has a member rcPaint which is the bounding box of the invalid region. If you want to get the invalid region itself, you can call GetUpdateRgn but you need to call it before BeginPaint (i.e. before constructing your CPaintDC for an MFC window).

Stability. What an interesting concept. -- Chris Maunder

ThatsAlok15-Mar-07 1:36

ThatsAlok

15-Mar-07 1:36

deeps_cute wrote:

hi i have to change the image of the button when we move mouse on it or clicked. i cant understand OnMouseMove function. can anyone help me pls.

sorry.. but you have to practice it yourself.. try making demo application!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
Global Interface Table: An Easy Way to Marshal an Interface Pointer[new]
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

Rajesh R Subramanian15-Mar-07 19:04

Rajesh R Subramanian

15-Mar-07 19:04

I don't get the attitude of these people. They want help and if you speak the reality to them, they will downvote you. Idiots. I will give my 5 to bring it up, but my vote is silver and so has less weightage... Anyway this votes doesn't matter. I hate the people who ask for help and then vote 1 when you tell them the truth Mad | :mad:

[Frozen Thoughts]
Nobody can give you wiser advice than yourself. - Cicero
ப்ரம்மா

ThatsAlok15-Mar-07 19:22

ThatsAlok

15-Mar-07 19:22

brahmma wrote:
hate the people who ask for help and then vote 1 when you tell them the truth

leave them dude.. is this voting system hardly matter to u me or anybody! Smile | :)

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
Global Interface Table: An Easy Way to Marshal an Interface Pointer[new]
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and You

Unhandled exception

RajiRaghu14-Mar-07 23:57

RajiRaghu

14-Mar-07 23:57

Hi,

I'm getting the following exception as follows, while executing in release version:-
unhandled exception at 0x7c910f29 in ere.exe: 0xC0000005: Access violation reading location 0x00000200.

And also if i debug, it is telling there is some problem in Cabc::~Cabc(void). But this kind of distructor i never written.

Any clues please?

Thanks
Raji

prasad_som14-Mar-07 23:59

prasad_som

14-Mar-07 23:59

Meomory allocated by your code is corrupted, or you have used it wrong way(out of index etc.).
But withoug seeing code its difficult to guess.

Prasad
Notifier using ATL | Operator new[],delete[][^]

benjymous15-Mar-07 0:15

benjymous

15-Mar-07 0:15

RajiRaghu wrote:
reading location 0x00000200

That sounds like you've dereferenced a NULL pointer somewhere, (and either using something inside a large struct, or you've incremented that pointer a few times before it's crashed)

RajiRaghu15-Mar-07 0:19

RajiRaghu

15-Mar-07 0:19

While checking Disassembly, the following lines are displyed. That's where it crashes.. But unable to know what it means.

0058FC93 call dword ptr [__imp_ATL::CStringT<char,strtraitmfc_dll<char,atl::chtraitscrt<char> > >::~CStringT<char,strtraitmfc_dll<char,atl::chtraitscrt<char> > > (0BEFDB8h)]
0058FC99 lea ecx,[esi+0F4h]
0058FC9F call dword ptr [__imp_ATL::CStringT<char,strtraitmfc_dll<char,atl::chtraitscrt<char> > >::~CStringT<char,strtraitmfc_dll<char,atl::chtraitscrt<char> > > (0BEFDB8h)]
0058FCA5 lea ecx,[esi+0F0h]
0058FCAB call dword ptr [__imp_ATL::CStringT<char,strtraitmfc_dll<char,atl::chtraitscrt<char> > >::~CStringT<char,strtraitmfc_dll<char,atl::chtraitscrt<char> > > (0BEFDB8h)]
0058FCB1 lea ecx,[esi+0ECh]
0058FCB7 call dword ptr [__imp_ATL::CStringT<char,strtraitmfc_dll<char,atl::chtraitscrt<char> > >::~CStringT<char,strtraitmfc_dll<char,atl::chtraitscrt<char> > > (0BEFDB8h)]
0058FCBD lea ecx,[esi+0E8h]
0058FCC3 call dword ptr [__imp_ATL::CStringT<char,strtraitmfc_dll<char,atl::chtraitscrt<char> > >::~CStringT<char,strtraitmfc_dll<char,atl::chtraitscrt<char> > > (0BEFDB8h)]
0058FCC9 lea ecx,[esi+0E4h]
0058FCCF call dword ptr [__imp_ATL::CStringT<char,strtraitmfc_dll<char,atl::chtraitscrt<char> > >::~CStringT<char,strtraitmfc_dll<char,atl::chtraitscrt<char> > > (0BEFDB8h)]
0058FCD5 lea ecx,[esi+0E0h]
0058FCDB call dword ptr [__imp_ATL::CStringT<char,strtraitmfc_dll<char,atl::chtraitscrt<char> > >::~CStringT<char,strtraitmfc_dll<char,atl::chtraitscrt<char> > > (0BEFDB8h)]
0058FCE1 mov eax,dword ptr [esi+0D8h]

Thanks
Raji

prasad_som15-Mar-07 0:22

prasad_som

15-Mar-07 0:22

Where does call stack takes you in the code ?
You have not your code, BTW.

Prasad
Notifier using ATL | Operator new[],delete[][^]