x::w::gridlayoutmanager layout=container->get_layoutmanager(); layout->requested_col_width(1, 100);
When a nested container gets sized to be wider than its natural
width, the nested container's grid layout manager attempts to
expand all the columns' width evenly, to fill in the extra space.
requested_col_width(col,
percentage)
instructs the grid layout manager that
column #col should take up the given percentage
of the total width of the container, as much as possible
(the leftmost column in the grid is column #0).
If there's extra width available, the grid layout manager attempts to use the extra space to grow the columns to their requested size. The grid layout manager never makes columns shorter than their minimum size. For example, “requested_col_width(1, 100);” requests 100% of the total width for column #1. Of course, the grid also has column #0, and perhaps other columns. They have to take up some of the horizontal real estate. The end game is that column #1 takes whatever extra space there's left. Requesting 100% for a column is a roundabout way of making the column use all its extra space.
More than one column may have a set width. The grid layout manager attempts to use the extra space to fatten up all the requested columns. If there's still additional space left it gets divided amongst all other columns.
There's also a requested_row_height() that
works similarly for any extra vertical real estate.
insert_row(),
append_row() and
remove_row() do not adjust the specified
row heights. If, for example, a requested height gets set for row #5,
and remove_row(3) removes row #3 from the
grid, the grid's requested height for row #5 is still in place.
However row #5 in the grid was the former row #6. After removing
row #3, all subsequent rows move up a notch.
layout->remove_row_defaults(row); layout->remove_col_defaults(col);
remove_col_defaults() unsets the requested
width for the given column, if any, together with all other column
settings, returning the column to its default width, and other
properties.
remove_row_defaults() unsets the requested
height for the given row, if any, together with all other row
settings, returning the row to its default width, and other
properties.