Qt click the input box to pop up the Input Panel and change the window position

Qtqlineedit input box Input Panel keyboard eventfilter change window position it

1. Define an Event Filter

Bool mydialog: eventfilter (qobject * o, qevent * E ){ If (e-> type () = qevent: mousebuttonpress) & (O = lineedit ))  {    Updataposition (); // display the Input Panel at the bottom of the input box.    Inputpanel. Show ();    Return true;  }  Else returnqdialog: eventfilter (o, e );} 2. Install the Event Filter on the input box, lineedit-> installeventfilter (this); void mydialog: updateposition (){ Qwidget * widget = focuswidget (); // obtain the control of the current focus  If (! Widget)    Return;  Qrectwidgetrect = widget-> rect (); // obtain the control's geometric information, that is, width and height.  Qpointpanelpos = qpoint (widgetrect. Left (), widgetrect. Bottom (); // coordinates of the lower left corner of the space and the upper left corner of the space  Panelpos = widget-> maptoglobal (panelpos); // convert to global, that is, coordinates starting from the upper left corner of the screen  Input. Move (panelpos); // move the upper left corner of the Input Panel to the coordinates.}