title: how to get the current widget's cursor size in pixels
body: <p>How to get the current mouse cursor size measured in pixels? I tried <code>mywidget.cursor().pixmap().size()</code> but it returns <code>(0,0)</code> for the standard arrow cursor.</p>
  
  <p>(I need this to show a special tool tip label which would appear just below the cursor and would follow the cursor and I cannot use the standard <code>QToolTip</code> for certain reasons - delays etc. I already have a nice, working solution but if I display the label exactly at the cursor position, the cursor is painted over it hiding some text on the label. Of course I could move it down using some 'magic' number like 32 pixels, but this would cause me bad stomach feelings.)</p>