UI: ShaderFx Drag and Drop, Layout Updates

This patch implements the list panel system D7490 for grease pencil
shader effects. It also moves their drawing to a callback in
ShaderFxTypeInfo in line with the extensible architecture refactoring
goal T75724.

The implementation is basically exactly the same as for the modifier
patch (9b099c86123fc82).

Thanks to Matias Mendiola (@mendio) for helping to develop the layout
changes.

Differential Revision: https://developer.blender.org/D7985

2 files changed, 5 insertions, 2 deletions

diff --git a/source/blender/editors/include/ED_object.h b/source/blender/editors/include/ED_object.h
index 0cc926987b2..73c58753531 100644
--- a/source/blender/editors/include/ED_object.h
+++ b/source/blender/editors/include/ED_object.h
@@ -453,6 +453,10 @@ int ED_object_shaderfx_move_down(struct ReportList *reports,
 int ED_object_shaderfx_move_up(struct ReportList *reports,
                                struct Object *ob,
                                struct ShaderFxData *fx);
+bool ED_object_shaderfx_move_to_index(struct ReportList *reports,
+                                      struct Object *ob,
+                                      struct ShaderFxData *fx,
+                                      const int index);
 
 /* object_select.c */
 void ED_object_select_linked_by_id(struct bContext *C, struct ID *id);
diff --git a/source/blender/editors/include/UI_interface.h b/source/blender/editors/include/UI_interface.h
index 8e9591c1963..bcbee51246e 100644
--- a/source/blender/editors/include/UI_interface.h
+++ b/source/blender/editors/include/UI_interface.h
@@ -2005,6 +2005,7 @@ void uiTemplatePathBuilder(uiLayout *layout,
                            const char *text);
 void uiTemplateModifiers(uiLayout *layout, struct bContext *C);
 void uiTemplateGpencilModifiers(uiLayout *layout, struct bContext *C);
+void uiTemplateShaderFx(uiLayout *layout, struct bContext *C);
 void uiTemplateConstraints(uiLayout *layout, struct bContext *C, bool use_bone_constraints);
 
 uiLayout *uiTemplateGpencilModifier(uiLayout *layout, struct bContext *C, struct PointerRNA *ptr);
@@ -2017,8 +2018,6 @@ void uiTemplateGpencilColorPreview(uiLayout *layout,
                                    float scale,
                                    int filter);
 
-uiLayout *uiTemplateShaderFx(uiLayout *layout, struct bContext *C, struct PointerRNA *ptr);
-
 void uiTemplateOperatorRedoProperties(uiLayout *layout, const struct bContext *C);
 
 void uiTemplateConstraintHeader(uiLayout *layout, struct PointerRNA *ptr);