GtkScrolledWindow::add_with_viewport
void add_with_viewport(
GtkWidget
child
);
add_with_viewport() is a convenience function that invisibly adds the child widget to a GtkViewport before adding the viewport to the GtkScrolledWindow.
The GtkViewport is a scrolling-aware container that provides its child widget with that characteristic.
忘却曲線を使ってこの知識を確実に記憶に残す
