UI: multi-drag number button editing

clicking and dragging down edits multiple number buttons at once. (patch D270)

1 files changed, 29 insertions, 1 deletions

diff --git a/source/blender/editors/interface/interface.c b/source/blender/editors/interface/interface.c
index 8ad96b4f325..fb0b0351453 100644
--- a/source/blender/editors/interface/interface.c
+++ b/source/blender/editors/interface/interface.c
@@ -584,7 +584,7 @@ static void ui_but_update_linklines(uiBlock *block, uiBut *oldbut, uiBut *newbut
 static bool ui_but_update_from_old_block(const bContext *C, uiBlock *block, uiBut **but_p, uiBut **but_old_p)
 {
 	/* flags from the buttons we want to refresh, may want to add more here... */
-	const int flag_copy = UI_BUT_REDALERT;
+	const int flag_copy = UI_BUT_REDALERT | UI_BUT_DRAG_MULTI;
 	const int drawflag_copy = 0;  /* None currently. */
 
 	uiBlock *oldblock = block->oldblock;
@@ -676,6 +676,8 @@ static bool ui_but_update_from_old_block(const bContext *C, uiBlock *block, uiBu
 		/* note: if layout hasn't been applied yet, it uses old button pointers... */
 	}
 	else {
+		but->flag = (but->flag & ~flag_copy) | (oldbut->flag & flag_copy);
+
 		/* ensures one button can get activated, and in case the buttons
 		 * draw are the same this gives O(1) lookup for each button */
 		BLI_remlink(&oldblock->buttons, oldbut);
@@ -1577,6 +1579,32 @@ bool ui_is_but_unit(const uiBut *but)
 	return true;
 }
 
+/**
+ * Check if this button is similar enough to be grouped with another.
+ */
+bool ui_is_but_compatible(const uiBut *but_a, const uiBut *but_b)
+{
+	if (but_a->type != but_b->type)
+		return false;
+	if (but_a->pointype != but_b->pointype)
+		return false;
+
+	if (but_a->rnaprop) {
+		if (but_a->rnapoin.type != but_b->rnapoin.type)
+			return false;
+		if (but_a->rnapoin.data != but_b->rnapoin.data)
+			return false;
+		if (but_a->rnapoin.id.data != but_b->rnapoin.id.data)
+			return false;
+		if (RNA_property_type(but_a->rnaprop) != RNA_property_type(but_b->rnaprop))
+			return false;
+		if (RNA_property_subtype(but_a->rnaprop) != RNA_property_subtype(but_b->rnaprop))
+			return false;
+	}
+
+	return true;
+}
+
 bool ui_is_but_rna_valid(uiBut *but)
 {
 	if (but->rnaprop == NULL || RNA_struct_contains_property(&but->rnapoin, but->rnaprop)) {