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Foundation Classes |
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The Alignment WidgetThe alignment widget allows you to
place a
widget
within its window at a position and size relative to the size of the
Alignment widget itself. For example, it can be very useful for
centering a widget within the window.
There are only two constructors associated with the Alignment widget: Alignment(); The first constructor creates an
empty
alignment,
the second creates an Alignment with the specified parameters. To alter
the parameters of an existing Alignment widget use the
Gtk::Alignment::set() method.
void
set(float xalign, float
yalign, float xscale, float
yscale);The 'xalign' and 'yalign'
arguments affect the position of the widget placed within the Alignment
widget and can range from 0.0 (on the left) to 1.0 (on the right). The
'xscale' and 'yscale' arguments effect the
amount of space allocated to the widget and can be 0.0 (never expand)
to 1.0 (fully expand).
You can also add padding (or blank space) on the different sides of a widget: void set_padding(unsigned int top,
unsigned int bottom, unsigned int
left, unsigned int right);For example, you could indent a widget by adding padding on the left. A child widget can be added to an Alignment widget using Gtk::Container::add(): alignment->add(*child_widget);For an example of using an Alignment widget have a look at the Progress Bar example.
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