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libgimpwidgets: enable ratio expressions for size entries with two fields

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When a size entry has exactly two fields, enable ratio expressions
in eevl.  Set the reference value to the value of the field that is
not currently being evaluated, and invert the ratio when evaluating
the second field.
This commit is contained in:
Ell
2017-10-04 12:37:45 -04:00
parent 6caae9c53b
commit f2a80a093a
1 changed files with 24 additions and 0 deletions
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24
libgimpwidgets/gimpsizeentry.c
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@ -1282,6 +1282,30 @@ gimp_size_entry_eevl_input_callback (GtkSpinButton *spinner,
options.unit_resolver_proc = gimp_size_entry_eevl_unit_resolver;
options.data = data;
/* enable ratio expressions when there are two fields */
if (gsef->gse->number_of_fields == 2)
{
GimpSizeEntryField *other_gsef;
options.ratio_expressions = TRUE;
if (gsef == gsef->gse->fields->data)
{
other_gsef = gsef->gse->fields->next->data;
options.ratio_invert = FALSE;
}
else
{
other_gsef = gsef->gse->fields->data;
options.ratio_invert = TRUE;
}
options.ratio_quantity.value = other_gsef->value;
options.ratio_quantity.dimension = 0;
}
success = gimp_eevl_evaluate (gtk_entry_get_text (GTK_ENTRY (spinner)),
&options,
&result,