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Python API: implement an Operator callback for dynamic description.

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Blender UI Layout API allows supplying parameters to operators via
button definitions. If an operator behavior strongly depends on its
parameters, it may be difficult to write a tooltip that covers all
of its operation modes. Thus it is useful to provide a way for the
operator to produce different descriptions based on the input info.

Reviewers: campbellbarton

Differential Revision: https://developer.blender.org/D5709
This commit is contained in:
Alexander Gavrilov
2019-09-06 16:26:10 +03:00
parent b0b24b77ff
commit 9ecbd67dfb
8 changed files with 114 additions and 14 deletions
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21
source/blender/python/intern/bpy_rna.c
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@@ -1768,7 +1768,12 @@ static int pyrna_py_to_prop(
if (value == Py_None) {
if ((RNA_property_flag(prop) & PROP_NEVER_NULL) == 0) {
if (data) {
*((char **)data) = (char *)NULL;
if (RNA_property_flag(prop) & PROP_THICK_WRAP) {
*(char *)data = 0;
}
else {
*((char **)data) = (char *)NULL;
}
}
else {
RNA_property_string_set(ptr, prop, NULL);
@@ -1813,7 +1818,12 @@ static int pyrna_py_to_prop(
}
else {
if (data) {
*((char **)data) = (char *)param;
if (RNA_property_flag(prop) & PROP_THICK_WRAP) {
BLI_strncpy((char *)data, (char *)param, RNA_property_string_maxlength(prop));
}
else {
*((char **)data) = (char *)param;
}
}
else {
RNA_property_string_set_bytes(ptr, prop, param, PyBytes_Size(value));
@@ -1862,7 +1872,12 @@ static int pyrna_py_to_prop(
/* XXX, this is suspect, but needed for function calls,
* need to see if there's a better way. */
if (data) {
*((char **)data) = (char *)param;
if (RNA_property_flag(prop) & PROP_THICK_WRAP) {
BLI_strncpy((char *)data, (char *)param, RNA_property_string_maxlength(prop));
}
else {
*((char **)data) = (char *)param;
}
}
else {
RNA_property_string_set(ptr, prop, param);