UI: Add support for popups to refresh their layput (D578)

This is needed for popups to chance state once activated,
currently it makes use of operators `check` callback, after values are modified,
as the file selector does already.

1 files changed, 18 insertions, 1 deletions

diff --git a/source/blender/editors/interface/interface_intern.h b/source/blender/editors/interface/interface_intern.h
index d44aacf7e53..cd3b6390184 100644
--- a/source/blender/editors/interface/interface_intern.h
+++ b/source/blender/editors/interface/interface_intern.h
@@ -428,6 +428,19 @@ struct uiKeyNavLock {
 	int event_xy[2];
 };
 
+typedef uiBlock * (*uiBlockHandleCreateFunc)(struct bContext *C, struct uiPopupBlockHandle *handle, void *arg1);
+
+struct uiPopupBlockCreate {
+	uiBlockCreateFunc              create_func;
+	uiBlockHandleCreateFunc handle_create_func;
+	void *arg;
+
+	int event_xy[2];
+
+	/* when popup is initialized from a button */
+	ARegion *butregion;
+};
+
 struct uiPopupBlockHandle {
 	/* internal */
 	struct ARegion *region;
@@ -442,6 +455,9 @@ struct uiPopupBlockHandle {
 	void (*cancel_func)(struct bContext *C, void *arg);
 	void *popup_arg;
 	
+	/* store data for refreshing popups */
+	struct uiPopupBlockCreate popup_create_vars;
+
 	struct wmTimer *scrolltimer;
 
 	struct uiKeyNavLock keynav_state;
@@ -496,7 +512,8 @@ bool ui_searchbox_apply(uiBut *but, struct ARegion *ar);
 void ui_searchbox_free(struct bContext *C, struct ARegion *ar);
 void ui_but_search_test(uiBut *but);
 
-typedef uiBlock * (*uiBlockHandleCreateFunc)(struct bContext *C, struct uiPopupBlockHandle *handle, void *arg1);
+uiBlock *ui_popup_block_refresh(struct bContext *C, uiPopupBlockHandle *handle,
+                                ARegion *butregion, uiBut *but);
 
 uiPopupBlockHandle *ui_popup_block_create(struct bContext *C, struct ARegion *butregion, uiBut *but,
                                           uiBlockCreateFunc create_func, uiBlockHandleCreateFunc handle_create_func,