All Manuals > CAPI User Guide and Reference Manual > 21 CAPI Reference Entries

stacked-tree-zoom-by-factor Function

Summary

Zoom the horizontal scale of a stacked-tree.

Package

capi

Signature

stacked-tree-zoom-by-factor stacked-tree factor => width-ratio

Arguments
stacked-tree
factor
A non-negative real.
Values
width-ratio
A real.
Description

The function stacked-tree-zoom-by-factor expands the horizontal dimension of stacked-tree by factor. If factor is between 0 and 1, the horizontal dimension contracts.

This is the same operation as is done by the keyboard gestures Ctrl--, Ctrl-+, Ctrl-i and Ctrl-o and you can use it to implement your own gestures.

The returned width-ratio is the value returned by stacked-tree-width-ratio.

Notes

Evaluating the form:

(stacked-tree-zoom-by-factor stacked-tree factor)

is equivalent to:

(setf (stacked-tree-width-ratio stacked-tree)
      (* (stacked-tree-width-ratio stacked-tree)
         factor))
See also

stacked-tree
stacked-tree-width-ratio


CAPI User Guide and Reference Manual (Unix version) - 01 Dec 2021 19:32:42