Function
GtkCustomAllocateFunc
Parameters
| widget | GtkWidget | 
| The widget to allocate. | |
| The data is owned by the caller of the function. | |
| width | int | 
| The new width of the widget. | |
| height | int | 
| The new height of the widget. | |
| baseline | int | 
| The new baseline of the widget, or -1. |