Controls how a widget deals with extra space in a single (x or y)
dimension.
Alignment only matters if the widget receives a "too large" allocation,
for example if you packed the widget with the "expand"
flag inside a GtkBox, then the widget might get extra space. If
you have for example a 16x16 icon inside a 32x32 space, the icon
could be scaled and stretched, it could be centered, or it could be
positioned to one side of the space.
Note that in horizontal context GTK_ALIGN_START and GTK_ALIGN_END
are interpreted relative to text direction.
GTK_ALIGN_BASELINE support for it is optional for containers and widgets, and
it is only supported for vertical alignment. When its not supported by
a child or a container it is treated as GTK_ALIGN_FILL.
GTK_ALIGN_FILL
stretch to fill all space if possible, center if
no meaningful way to stretch
GTK_ALIGN_START
snap to left or top side, leaving space on right
or bottom
GTK_ALIGN_END
snap to right or bottom side, leaving space on left
or top
GTK_ALIGN_CENTER
center natural width of widget inside the
allocation
GTK_ALIGN_BASELINE
align the widget according to the baseline. Since 3.10.
Controls how a widget deals with extra space in a single (x or y) dimension. Alignment only matters if the widget receives a "too large" allocation, for example if you packed the widget with the "expand" flag inside a GtkBox, then the widget might get extra space. If you have for example a 16x16 icon inside a 32x32 space, the icon could be scaled and stretched, it could be centered, or it could be positioned to one side of the space. Note that in horizontal context GTK_ALIGN_START and GTK_ALIGN_END are interpreted relative to text direction. GTK_ALIGN_BASELINE support for it is optional for containers and widgets, and it is only supported for vertical alignment. When its not supported by a child or a container it is treated as GTK_ALIGN_FILL. GTK_ALIGN_FILL stretch to fill all space if possible, center if no meaningful way to stretch GTK_ALIGN_START snap to left or top side, leaving space on right or bottom GTK_ALIGN_END snap to right or bottom side, leaving space on left or top GTK_ALIGN_CENTER center natural width of widget inside the allocation GTK_ALIGN_BASELINE align the widget according to the baseline. Since 3.10.