Description:
While working with Layoutgrids and scaling an inserted picture it is desired to understand and define the dimensions of the pictureframe as a viewport, like scribus does. 
Let's say the user inserts a 3:4 images. 
In the properties-dialog he sets the dimension of the frame to H:2cm W:2cm. Now the images looses the aspect ratio, but normally the user wants the aspect ratio always kept, moreover he wants to reduce the viewport of the image. 
If the user now checks "Keep Ratio" and an additional checker "Autocrop" then the images should be rescaled to the maximum size to fit the given frame. 
Further manipulation can be done in the crop-register by adjusting the zoom-percentage and the offset-values. Its quite the same way scribus does. 
Nowaday I need to crop images in an external programm, the crop dialog is not suitable for me.

Actual Results:
If checked "KeepRatio" height and width of a frame are computed dependantly. Its not possible to set values independently.

Expected Results:
 


Reproducible: Always


User Profile Reset: No



Additional Info:
If checked an additional "Autocrop" it should be possible to vary the values independently, the pictureframe acts like a viewport