Passes an activate event to the cell renderer for possible processing.
Some cell renderers may use events; for example, `GtkCellRendererToggle` toggles when it gets a mouse click.
this |
a `GtkCellRenderer` |
event |
a `GdkEvent` |
widget |
widget that received the event |
path |
widget-dependent string representation of the event location; e.g. for `GtkTreeView`, a string representation of `GtkTreePath` |
background_area |
background area as passed to |
cell_area |
cell area as passed to |
flags |
render flags |
true if the event was consumed/handled |