creating a custom GUI elements and widgets.

i have some ideas to do with Qt, but i need to create some custom GUI elements such the draw area in GIMP, PhotoShop or Inkscape. or someting like Text processors, and not just buttons and checkboxes and usual stuffs...
can anyone help me?

Ultimately most widgets are painted using QPainter, i.e. they draw themselves in their paintEvent() method.

There are some higher level constructs, e.g. QGraphicsView, and there is the option of drawing using OpenGL.

Cheers,
_