???How is this done???

This is a discussion on ???How is this done??? within the Windows Programming forums, part of the Platform Specific Boards category; OK. A friend of mine made a program in class today and refuses to disclose the code to me. Not ...

  1. #1
    Nor
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    ???How is this done???

    OK. A friend of mine made a program in class today and refuses to disclose the code to me.
    Not I don't want to steal his design but he created a window which the mouse goes under. Is this an illusion or is his window above the curser?

    He says it is stright winAPI.
    I know DirectDraw can do this, but can winAPI?
    I have no clue what he did. But I think its cool.
    Any thoughts?
    Last edited by Nor; 05-07-2002 at 11:12 PM.

  2. #2
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    I'm sure there are 100's of ways to do this. Here is a way I just came up with on the fly. I have no idea if this will actually work but I do not see why it would not. Check the mouse movement messages in your WinProc and look for WM_MOUSEMOVE, then get the x and y position. When it is inside of the rectangle that is the window simply call:

    ShowCursor( FALSE );

    and similarly when the cursors' coordinates are outside of the window call

    ShowCursor( TRUE );

    Look up these on MSDN if you have further issues about them. Hope this helps. Tell your buddy don't be stingey.

  3. #3
    train spotter
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    Code:
    case WM_NCMOUSEMOVE://outside client area may need a call to TrackMouseEvent()
    ShowCursor(TRUE);
    break;
    case WM_MOUSEMOVE://in window
    ShowCursor(FALSE)
    break;
    Could also use PtInRect() and MAKEPOINTS() on the mouse coods.

    Try this to restrict the mouse to smaller and smaller areas inside the dialog
    Code:
    case WM_MOUSELEAVE:
    static RECT        Rect;
    static UNIT        uTimer=0;
    GetWindowRect(hWnd,&Rect);
    ClipCursor(&Rect);
    uTimer=SetTimer(hWnd, WM_USER+10001,20000,NULL);
    break;
    case WM_LBUTTONDOWN://each time clicked will reduce the area by 100x100
    Rect.left+=50;
    Rect.top+=50;
    Rect.right-=50;
    Rect.bottom-=50;
    ReleaseCapture()
    ClipCursor(hWnd,&Rect);
    break;
    case WM_TIMER://will release the cursor after 20 sec
    if(wParam==uTimer)
    {
         ReleaseCapture();
         KillTimer(hWnd,uTimer);
    }
    break;
    Needs error checking for the Rect (ie if left>right)
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  4. #4
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    hmmm


    maybe he just drawed a new cursor that is invisible

    and the cursor takes effect only when the mouse is on the window

    so you can think that it goes behind the window

  5. #5
    *
    Guest
    You cannot put the mouse behind any window. The best you can do is to hide it, or change it to a map/mask with no pixmap.

    It's purely an illusion.

    he has no control over the depth of the mouse, that is handled by the desktop and windows managers.

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