dev-cpp-users

[Dev-C++] why doesn't this work?

[Vlada D. <dj...@im...>]

Hi.
Maybe I'm a little anoying with this, but I'm really confused. I'm =
trying to get an MDI child window to show when I press File->new in the =
menu, but the window does not show, though its name is appnded to Window =
menu every time I press File->New. After I placed the same code in =
WM_CREATE message handler, the window appeared OK. Why is this? Here's a =
piece of my code:

switch(LOWORD(wParam))
            {
                case ID_FILE_NEW:
                {
                    if(nChildCount=3D=3D0)//if there are no child =
windows
                    {
                        CLIENTCREATESTRUCT ccs;
                        =
SetMenu(hFrameWnd,LoadMenu(g_hInstance,MAKEINTRESOURCE(IDM_MENU)));//set =
another menu
                        =
ccs.hWindowMenu=3DGetSubMenu(GetMenu(hFrameWnd),1);
                        ccs.idFirstChild=3DID_FIRST_CHILD;
                       =20
                        =
hMDIClient=3DCreateWindowEx(WS_EX_CLIENTEDGE,"MDICLIENT",(LPCTSTR)NULL,WS=
_CHILD|WS_CLIPCHILDREN,
                        =
CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,hFrameWnd,(HMENU)=
ccs.idFirstChild,
                        g_hInstance,(LPVOID)&ccs);
                        if(!hMDIClient)
                            MessageBox(hFrameWnd,"Can't create client =
wnd","error",MB_OK);
                        ShowWindow(hMDIClient,SW_SHOW);
                       =20
                    }
                    /*create child window*/
                    =
hChildWnd=3DCreateMDIWindow(g_sChildClass,"Untitled",WS_HSCROLL|WS_VSCROL=
L,CW_USEDEFAULT,
                    CW_USEDEFAULT, =
300,200,hMDIClient,g_hInstance,lParam);
                    if(!hChildWnd)
                        MessageBox(hFrameWnd,"Can't create child =
wnd","error",MB_OK);
                    ShowWindow(hChildWnd,SW_SHOW);
                    UpdateWindow(hChildWnd);
                    nChildCount++;// increase number of MDI child =
windows
                }
                break;

Regards,
Vlada

[Dev-C++] why doesn't this work?

[Vlada D. <dj...@im...>]

Hi.
This is suppposed to be simple, but I can't get it to work. All I want to do
is display some text using TextOut function, but I get only a blank window.
Here's the code:

 HDC hDC;
        case WM_CREATE:
        {
            char str[]="Display text";
            hDC=GetDC(hwnd);
            TextOut(hDC,100,100,str,lstrlen(str));
            ReleaseDC(hwnd,hDC);
        }
        break;

What am I doing wrong?
------------
Vlada

Re: [Dev-C++] why doesn't this work?

[<cg...@wo...>]

When you process the WM_CREATE, the window is not yet created, so you 
cannot work with its hdc, at least, it is what it seems to happen. I did 
an experiment like yours and didn't worked, I deleted the code and moved 
to another WM_.

Vlada Djurovic wrote:

>Hi.
>This is suppposed to be simple, but I can't get it to work. All I want to do
>is display some text using TextOut function, but I get only a blank window.
>Here's the code:
>
> HDC hDC;
>        case WM_CREATE:
>        {
>            char str[]="Display text";
>            hDC=GetDC(hwnd);
>            TextOut(hDC,100,100,str,lstrlen(str));
>            ReleaseDC(hwnd,hDC);
>        }
>        break;
>
>What am I doing wrong?
>------------
>Vlada
>
>
>
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>

RE: [Dev-C++] why doesn't this work?

[P.D. v. Z. <pd...@xs...>]

In general, the only place where you should draw anything on your window
is when Windows requests you to, in WM_PAINT ... if you draw anywhere
else, there's a pretty big chance that what you painted on the screen
will get overwritten again when Windows sends a WM_PAINT (since you
don't do anything there, Windows will decide what to do).

-----Original Message-----
From: dev...@li...
[mailto:dev...@li...] On Behalf Of Carlos
Garc=EDa del Monte
Sent: Thursday, February 20, 2003 12:29 PM
To: dev-cpp-users-list
Subject: Re: [Dev-C++] why doesn't this work?


When you process the WM_CREATE, the window is not yet created, so you=20
cannot work with its hdc, at least, it is what it seems to happen. I did

an experiment like yours and didn't worked, I deleted the code and moved

to another WM_.

Vlada Djurovic wrote:

>Hi.
>This is suppposed to be simple, but I can't get it to work. All I want
to do
>is display some text using TextOut function, but I get only a blank
window.
>Here's the code:
>
> HDC hDC;
>        case WM_CREATE:
>        {
>            char str[]=3D"Display text";
>            hDC=3DGetDC(hwnd);
>            TextOut(hDC,100,100,str,lstrlen(str));
>            ReleaseDC(hwnd,hDC);
>        }
>        break;
>
>What am I doing wrong?
>------------
>Vlada
>
>
>
>-------------------------------------------------------
>This SF.net email is sponsored by: SlickEdit Inc. Develop an edge.
>The most comprehensive and flexible code editor you can use.
>Code faster. C/C++, C#, Java, HTML, XML, many more. FREE 30-Day Trial.
>www.slickedit.com/sourceforge
>_______________________________________________
>Dev-cpp-users mailing list
>Dev...@li...
>TO UNSUBSCRIBE: http://www.noicys.cjb.net/devcpp/ub.htm
>https://lists.sourceforge.net/lists/listinfo/dev-cpp-users
>
> =20
>




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Code faster. C/C++, C#, Java, HTML, XML, many more. FREE 30-Day Trial.
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_______________________________________________
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