gtkContainerPropagateExpose
When a container receives an expose event, it must send synthetic
expose events to all children that don't have their own GdkWindows.
This function provides a convenient way of doing this. A container,
when it receives an expose event, calls gtkContainerPropagateExpose
once for each child, passing in the event the container received.
gtkContainerPropagateExpose(object, child, event)
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a child of |
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a expose event sent to container |
gtkContainerPropagateExpose takes care of deciding whether
an expose event needs to be sent to the child, intersecting
the event's area with the child area, and sending the event.
In most cases, a container can simply either simply inherit the
"expose" implementation from GtkContainer, or, do some drawing
and then chain to the ::expose implementation from GtkContainer.
Derived by RGtkGen from GTK+ documentation
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