scrolling of the window in c language graphics

This is a discussion on scrolling of the window in c language graphics within the C Programming forums, part of the General Programming Boards category; I would like some suggestions and if possible the source code for scrolling like the scrolling we usually do in ...

  1. #1
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    scrolling of the window in c language graphics

    I would like some suggestions and if possible the source code
    for scrolling like the scrolling we usually do in windows.

    I tried my best but i'm unable to do it.

    I making a editor like a notepad in windows with
    C language in graphics mode.So ur help will be most valuable to me.

    Please be fast.
    Last edited by denny; 12-24-2001 at 07:08 AM.

  2. #2
    the Corvetter
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    Look up the syntax of ScrollWindow() for the API. That does what you want. Don't forget to UpdateWindow(hwnd) after though.

    --Garfield
    1978 Silver Anniversary Corvette

  3. #3
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    Question I have this question too!

    I have this question too!
    pleaese answer me!!!
    h_hadizadeh@hotmail.com

  4. #4
    Banned Troll_King's Avatar
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    I think that you are talking about a screen mode but if you want to build an application like notepad you need to write a Windows program. Use a Windows Form.

  5. #5
    Banned maes's Avatar
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    If you are making a windows program, I think it can be done very easily
    Make an edit box the size of your client area, add a menu with all the features you want and it is done. Iíve never done it and there could be some unforeseen difficulties, but I think this is the main thought.
    SVG is the future

  6. #6
    the Corvetter
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    Originally posted by maes
    If you are making a windows program, I think it can be done very easily
    Make an edit box the size of your client area, add a menu with all the features you want and it is done. Iíve never done it and there could be some unforeseen difficulties, but I think this is the main thought.
    Sounds good!

    --Garfield
    1978 Silver Anniversary Corvette

  7. #7
    train spotter
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    Better control if over text formatting if you use a HDC. Try getting different fonts, line breaks, right or center justification, colours ect in the edit ctrl.

    Use a frame ctrl, get its HWND.
    GetDC() on this HWND and create TWO Compatible HDC's with CreateCompatibleDC(), create two bmp's with CreateCompatibleBitmap(), select them into the HDC's with SelectObject() catching the returnsed BMP's to be replaced (re SelectObject()'ed) on exit, before the created HDC's and BMP's are deleted with DeleteObject()

    One HDC is to do all the drawing on (Buffer or FrameBuffer). Assemble the text, when you have finished copy to the other (ScreenDC). Then call a paint with InvalidateRect()

    The paint function is called in response to a WM_PAINT msg in the callback.
    In the paint call BeginPaint() and BitBlt() the ScreenDC to the DC returned from the BeginPaint().
    Call EndPaint()

    Look at ScrollDC() to do the scrolling.
    Last edited by novacain; 12-27-2001 at 10:07 PM.
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  8. #8
    Guest Sebastiani's Avatar
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    here's a useful one, though not for scrolling......



    void CenteredTextOut(HDC hdc, int Ycoord, char *string)
    {
    int Xcoord = GetSystemMetrics(SM_CXSCREEN);

    int len = strlen(string);

    SIZE sz;

    GetTextExtentPoint32(hdc, string, len, &sz);

    Xcoord = (Xcoord / 2) - (sz.cx / 2);

    TextOut(hdc, Xcoord, Ycoord, string, len);
    }
    Code:
    if( numeric_limits< byte >::digits != bits_per_byte )
        error( "program requires bits_per_byte-bit bytes" );
    24bbs.cpp

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