Capture Cursor

[Richard]

Hi All,
I would like to use a custom QCursor with a Pixmap, but instead of create an entirely new shape I would rather capture the currently used arrow cursor and modify it a bit on the fly. So for this I would need to "Capture/screenshot" the current cursor shape into a Pixmap. Is this possible by any chance?

thanks you
rich.

[SGaist]

Hi,

AFAICT it should be possible when using a QPixmap based cursor but it doesn't look like it for the default shapes

[Chris Kawa]

There doesn't seem to be a way to do that in Qt api (apart from the pixmap cursors as @SGaist mentioned), but if you're willing to go platform specific you can do that on windows with the help of some winapi and QtWinExtras module:

#include <QPixmap>
#include <QtWin>
#include <Windows.h>

QPixmap GrabCursor()
{
    CURSORINFO info;
    info.cbSize = sizeof(info);
    GetCursorInfo(&info);

    int width = GetSystemMetrics(SM_CXCURSOR);
    int height = GetSystemMetrics(SM_CYCURSOR);

    HDC hdc = GetDC(NULL);
    HBITMAP bitmap = CreateCompatibleBitmap(hdc, width, height);

    HDC bitmapDC = CreateCompatibleDC(hdc);
    HGDIOBJ prevObj = SelectObject(bitmapDC, bitmap);
    DrawIcon(bitmapDC, 0, 0, info.hCursor);

    QPixmap pixmap = QtWin::fromHBITMAP(bitmap, QtWin::HBitmapAlpha);

    SelectObject(bitmapDC, prevObj);
    DeleteObject(bitmap);
    DeleteDC(bitmapDC);
    ReleaseDC(NULL, hdc);

    return pixmap;
}

[Richard]

Thanks Chris I will give that a try.