UI: Drag & Drop to Properties Materials Panel

Support drag/drop of materials to Properties Material Slots.

See D13549 for more details.

Differential Revision: https://developer.blender.org/D13549

Reviewed by Julian Eisel

1 files changed, 64 insertions, 0 deletions

diff --git a/source/blender/editors/interface/interface_dropboxes.cc b/source/blender/editors/interface/interface_dropboxes.cc
index a24554ef68d..40d1a0ca6f5 100644
--- a/source/blender/editors/interface/interface_dropboxes.cc
+++ b/source/blender/editors/interface/interface_dropboxes.cc
@@ -6,7 +6,11 @@
 
 #include "BKE_context.h"
 
+#include "BLI_string.h"
+#include "BLT_translation.h"
+
 #include "DNA_space_types.h"
+#include "DNA_material_types.h"
 
 #include "MEM_guardedalloc.h"
 
@@ -61,6 +65,60 @@ static void ui_drop_name_copy(wmDrag *drag, wmDropBox *drop)
 }
 
 /* ---------------------------------------------------------------------- */
+/* Material Drag/Drop Operators */
+
+static bool ui_drop_material_poll(bContext *C, wmDrag *drag, const wmEvent *UNUSED(event))
+{
+  PointerRNA mat_slot = CTX_data_pointer_get_type(C, "material_slot", &RNA_MaterialSlot);
+  return WM_drag_is_ID_type(drag, ID_MA) && !RNA_pointer_is_null(&mat_slot);
+}
+
+static void ui_drop_material_copy(wmDrag *drag, wmDropBox *drop)
+{
+  const ID *id = WM_drag_get_local_ID_or_import_from_asset(drag, ID_MA);
+  RNA_int_set(drop->ptr, "session_uuid", (int)id->session_uuid);
+}
+
+static char *ui_drop_material_tooltip(bContext *C,
+                                      wmDrag *drag,
+                                      const int UNUSED(xy[2]),
+                                      struct wmDropBox *UNUSED(drop))
+{
+  PointerRNA rna_ptr = CTX_data_pointer_get_type(C, "object", &RNA_Object);
+  Object *ob = (Object *)rna_ptr.data;
+  BLI_assert(ob);
+
+  PointerRNA mat_slot = CTX_data_pointer_get_type(C, "material_slot", &RNA_MaterialSlot);
+  BLI_assert(mat_slot.data);
+
+  const int target_slot = RNA_int_get(&mat_slot, "slot_index") + 1;
+
+  PointerRNA rna_prev_material = RNA_pointer_get(&mat_slot, "material");
+  Material *prev_mat_in_slot = (Material *)rna_prev_material.data;
+  const char *dragged_material_name = WM_drag_get_item_name(drag);
+
+  char *result;
+  if (prev_mat_in_slot) {
+    const char *tooltip = TIP_("Drop %s on slot %d (replacing %s) of %s");
+    result = BLI_sprintfN(tooltip,
+                          dragged_material_name,
+                          target_slot,
+                          prev_mat_in_slot->id.name + 2,
+                          ob->id.name + 2);
+  }
+  else if (target_slot == ob->actcol) {
+    const char *tooltip = TIP_("Drop %s on slot %d (active slot) of %s");
+    result = BLI_sprintfN(tooltip, dragged_material_name, target_slot, ob->id.name + 2);
+  }
+  else {
+    const char *tooltip = TIP_("Drop %s on slot %d of %s");
+    result = BLI_sprintfN(tooltip, dragged_material_name, target_slot, ob->id.name + 2);
+  }
+
+  return result;
+}
+
+/* -------------------------------------------------------------------- */
 
 void ED_dropboxes_ui()
 {
@@ -78,4 +136,10 @@ void ED_dropboxes_ui()
                  ui_drop_name_copy,
                  WM_drag_free_imported_drag_ID,
                  nullptr);
+  WM_dropbox_add(lb,
+                 "UI_OT_drop_material",
+                 ui_drop_material_poll,
+                 ui_drop_material_copy,
+                 WM_drag_free_imported_drag_ID,
+                 ui_drop_material_tooltip);
 }