Fix T42506 sequencer not limiting zoom.

Fix by Campbell thanks!

3 files changed, 26 insertions, 2 deletions

diff --git a/source/blender/blenkernel/BKE_blender.h b/source/blender/blenkernel/BKE_blender.h
index 34d34e92447..63cc9213b2e 100644
--- a/source/blender/blenkernel/BKE_blender.h
+++ b/source/blender/blenkernel/BKE_blender.h
@@ -42,7 +42,7 @@ extern "C" {
  * and keep comment above the defines.
  * Use STRINGIFY() rather than defining with quotes */
 #define BLENDER_VERSION         273
-#define BLENDER_SUBVERSION      8
+#define BLENDER_SUBVERSION      9
 /* 262 was the last editmesh release but it has compatibility code for bmesh data */
 #define BLENDER_MINVERSION      270
 #define BLENDER_MINSUBVERSION   5
diff --git a/source/blender/blenloader/intern/versioning_270.c b/source/blender/blenloader/intern/versioning_270.c
index f4591e4d107..089ee158570 100644
--- a/source/blender/blenloader/intern/versioning_270.c
+++ b/source/blender/blenloader/intern/versioning_270.c
@@ -629,4 +629,28 @@ void blo_do_versions_270(FileData *fd, Library *UNUSED(lib), Main *main)
 			}
 		}
 	}
+
+	if (!MAIN_VERSION_ATLEAST(main, 273, 9)) {
+		bScreen *scr;
+		ScrArea *sa;
+		SpaceLink *sl;
+		ARegion *ar;
+
+		/* Make sure sequencer preview area limits zoom */
+		for (scr = main->screen.first; scr; scr = scr->id.next) {
+			for (sa = scr->areabase.first; sa; sa = sa->next) {
+				for (sl = sa->spacedata.first; sl; sl = sl->next) {
+					if (sl->spacetype == SPACE_SEQ) {
+						for (ar = sl->regionbase.first; ar; ar = ar->next) {
+							if (ar->regiontype == RGN_TYPE_PREVIEW) {
+								ar->v2d.keepzoom |= V2D_LIMITZOOM;
+								break;
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+
 }
diff --git a/source/blender/editors/space_sequencer/space_sequencer.c b/source/blender/editors/space_sequencer/space_sequencer.c
index 7be356dd2ec..8934628ee2c 100644
--- a/source/blender/editors/space_sequencer/space_sequencer.c
+++ b/source/blender/editors/space_sequencer/space_sequencer.c
@@ -144,7 +144,7 @@ static SpaceLink *sequencer_new(const bContext *C)
 	ar->alignment = RGN_ALIGN_TOP;
 	ar->flag |= RGN_FLAG_HIDDEN;
 	/* for now, aspect ratio should be maintained, and zoom is clamped within sane default limits */
-	ar->v2d.keepzoom = V2D_KEEPASPECT | V2D_KEEPZOOM;
+	ar->v2d.keepzoom = V2D_KEEPASPECT | V2D_KEEPZOOM | V2D_LIMITZOOM;
 	ar->v2d.minzoom = 0.00001f;
 	ar->v2d.maxzoom = 100000.0f;
 	ar->v2d.tot.xmin = -960.0f; /* 1920 width centered */