From 56c946e2ec3ce09e02960a8ae8a308a8acb0a4fa Mon Sep 17 00:00:00 2001
From: Darrell Schiebel <darrell@schiebel.us>
Date: Tue, 9 Jan 2024 15:06:45 -0500
Subject: [PATCH] fix cursor tracking string update for pixels == 0

---
 casagui/apps/_interactiveclean.py | 17 +++++++++++------
 casagui/toolbox/_cube.py          |  4 ++--
 2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/casagui/apps/_interactiveclean.py b/casagui/apps/_interactiveclean.py
index 8f03780..bcd45d2 100644
--- a/casagui/apps/_interactiveclean.py
+++ b/casagui/apps/_interactiveclean.py
@@ -406,12 +406,17 @@ def __init__( self, vis, imagename, usemask='user', mask='', initial_mask_pixel=
                      ### --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---
                      'update-converge': '''function update_convergence( msg ) {
                                                let convdata
-                                               if ( typeof msg === 'undefined' && '_convergence_data' in flux_src ) {
-                                                   // use complete convergence cache attached to flux_src...
-                                                   // get the convergence data for channel and stokes
-                                                   const pos = img_src.cur_chan
-                                                   convdata = flux_src._convergence_data.chan.get(pos[1]).get(pos[0])
-                                                   //          chan-------------------------------^^^^^^      ^^^^^^----stokes
+                                               if ( typeof msg === 'undefined' ) {
+                                                   if ( '_convergence_data' in flux_src ) {
+                                                       // use complete convergence cache attached to flux_src...
+                                                       // get the convergence data for channel and stokes
+                                                       const pos = img_src.cur_chan
+                                                       convdata = flux_src._convergence_data.chan.get(pos[1]).get(pos[0])
+                                                       //          chan-------------------------------^^^^^^      ^^^^^^----stokes
+                                                   } else {
+                                                       console.log( 'Insert code here to get convergence data when no cache and no update (msg) is available...' )
+                                                       return
+                                                   }
                                                } else if ( 'result' in msg ) {
                                                    // update based on msg received from convergence update message
                                                    convdata = msg.result.converge
diff --git a/casagui/toolbox/_cube.py b/casagui/toolbox/_cube.py
index 890e024..87aea0d 100644
--- a/casagui/toolbox/_cube.py
+++ b/casagui/toolbox/_cube.py
@@ -1856,8 +1856,8 @@ def connect( self ):
             movement_code_pixel_update = '''if ( cb_obj.event_type === 'move' ) {
                                                 function update_pixel( msg ) {
                                                     if ( msg.update &&
-                                                         msg.update.pixel &&
-                                                         msg.update.index &&
+                                                         'pixel' in msg.update &&
+                                                         'index' in msg.update &&
                                                          msg.update.index.length == 2 ) {
                                                         const digits = 5
                                                         if ( pix_wrld && pix_wrld.label == 'pixel' ) {