I had a project once that required me to build a GUI in C using Motif. It was a joy to use. I recall there was a simple concept called RowColumn. All the GUI

I had a project once that required me to build a GUI in C using Motif. It was a joy to use. I recall there was a simple concept called RowColumn. All the GUI widgets were either in a Row or in a Column. It was highly orthogonal and allowed you to build good-looking UI's that acted in a reasonable way when resized, etc.