Image Editor: Add border zoom

Use Shift-B, UV border-select-pinned is now Ctrl-B.

Patch from @rav66

1 files changed, 56 insertions, 0 deletions

diff --git a/source/blender/editors/space_image/image_ops.c b/source/blender/editors/space_image/image_ops.c
index ae5dcc4c73f..88bab733013 100644
--- a/source/blender/editors/space_image/image_ops.c
+++ b/source/blender/editors/space_image/image_ops.c
@@ -990,6 +990,62 @@ void IMAGE_OT_view_zoom_ratio(wmOperatorType *ot)
 	              "Ratio", "Zoom ratio, 1.0 is 1:1, higher is zoomed in, lower is zoomed out", -FLT_MAX, FLT_MAX);
 }
 
+/********************** view border-zoom operator *********************/
+
+static int image_view_zoom_border_exec(bContext *C, wmOperator *op)
+{
+	SpaceImage *sima = CTX_wm_space_image(C);
+	ARegion *ar = CTX_wm_region(C);
+	rctf bounds;
+	const int gesture_mode = RNA_int_get(op->ptr, "gesture_mode");
+
+	WM_operator_properties_border_to_rctf(op, &bounds);
+
+	UI_view2d_region_to_view_rctf(&ar->v2d, &bounds, &bounds);
+
+	const struct {
+		float xof;
+		float yof;
+		float zoom;
+	} sima_view_prev = {
+		.xof = sima->xof,
+		.yof = sima->yof,
+		.zoom = sima->zoom,
+	};
+
+	sima_zoom_set_from_bounds(sima, ar, &bounds);
+
+	/* zoom out */
+	if (gesture_mode == GESTURE_MODAL_OUT) {
+		sima->xof = sima_view_prev.xof + (sima->xof - sima_view_prev.xof);
+		sima->yof = sima_view_prev.yof + (sima->yof - sima_view_prev.yof);
+		sima->zoom = sima_view_prev.zoom * (sima_view_prev.zoom / sima->zoom);
+	}
+
+	ED_region_tag_redraw(ar);
+
+	return OPERATOR_FINISHED;
+}
+
+void IMAGE_OT_view_zoom_border(wmOperatorType *ot)
+{
+	/* identifiers */
+	ot->name = "Zoom to Border";
+	ot->description = "Zoom in the view to the nearest item contained in the border";
+	ot->idname = "IMAGE_OT_view_zoom_border";
+
+	/* api callbacks */
+	ot->invoke = WM_border_select_invoke;
+	ot->exec = image_view_zoom_border_exec;
+	ot->modal = WM_border_select_modal;
+	ot->cancel = WM_border_select_cancel;
+
+	ot->poll = space_image_main_region_poll;
+
+	/* rna */
+	WM_operator_properties_gesture_border(ot, false);
+}
+
 /**************** load/replace/save callbacks ******************/
 static void image_filesel(bContext *C, wmOperator *op, const char *path)
 {