Sets widget as the widget that this will capture key events from.
If key events are handled by the search bar, the bar will be shown, and the entry populated with the entered text.
Note that despite the name of this function, the events are only 'captured' in the bubble phase, which means that editable child widgets
of widget will receive text input before it gets captured. If that is not desired, you can capture and forward the events
yourself with [[email protected]].
| this |
a `GtkSearchBar` |
| widget |
a `GtkWidget` |