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

1 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/editors/space_buttons/space_buttons.c b/source/blender/editors/space_buttons/space_buttons.c
index 2cc9679dd3f..71b86996989 100644
--- a/source/blender/editors/space_buttons/space_buttons.c
+++ b/source/blender/editors/space_buttons/space_buttons.c
@@ -33,6 +33,7 @@
 #include "BKE_gpencil_modifier.h" /* Types for registering panels. */
 #include "BKE_modifier.h"
 #include "BKE_screen.h"
+#include "BKE_shader_fx.h"
 
 #include "ED_screen.h"
 #include "ED_space_api.h"
@@ -648,6 +649,15 @@ void ED_spacetype_buttons(void)
       mti->panelRegister(art);
     }
   }
+  for (int i = 0; i < NUM_SHADER_FX_TYPES; i++) {
+    if (i == eShaderFxType_Light_deprecated) {
+      continue;
+    }
+    const ShaderFxTypeInfo *fxti = BKE_shaderfx_get_info(i);
+    if (fxti != NULL && fxti->panelRegister != NULL) {
+      fxti->panelRegister(art);
+    }
+  }
 
   /* regions: header */
   art = MEM_callocN(sizeof(ARegionType), "spacetype buttons region");