Ubuntu

Binary package “libqt4-designer” in ubuntu xenial

  1. Xenial (16.04)
  2. libqt4-designer

Qt 4 designer module

 Qt is a cross-platform C++ application framework. Qt's primary feature
 is its rich set of widgets that provide standard GUI functionality.
 .
 The QtDesigner module provides classes that allow you to create your own
 custom widget plugins for Qt Designer, and classes that enable you to access
 Qt Designer's components.

Source package