the text is centered at the tab stop position until the available space is filled. Since: 1.50
text before the first occurrence of the decimal point character appears to the left of the tab stop position (until the available space is filled), the rest to the right. Since: 1.50
the text appears to the right of the tab stop position
the text appears to the left of the tab stop position until the available space is filled. Since: 1.50
Pango.TabAlign specifies where the text appears relative to the tab stop position.