the widget to add
the child of grid that child will be placed next to, or NULL to place child at the beginning or end
the side of sibling that child is positioned next to
the number of columns that child will span
the number of rows that child will span
Adds a widget to the grid.
The widget is placed next to sibling, on the side determined by side. When sibling is NULL, the widget is placed in row (for left or right placement) or column 0 (for top or bottom placement), at the end indicated by side.
Attaching widgets labeled [1], [2], [3] with sibling == NULL and side == GTK_POS_LEFT yields a layout of [3][2][1].