Cropping Image From Rotate Rectangle

[Parvat]

I have an Image as Pixmap Item and Rectangle around the Image as RectItem. I can adjust the rectItem from top ,left, bottom ,right, with 4 sliders. and then accordingly i crop the image this Part is done .

but

When i adjust the rectItem and when try to rotate the rectItem and when i try to crop that image from rotate rectItem or rect i am not getting that cropped Image

I m Badly Stuck on this and wanted to do this ASAP real bad. plzzz Help me guys ...