partly workaround for #72

BBjGridExWidget.bbj

@@ -324,6 +324,7 @@ class public BBjGridExWidget extends BBjWidget
     field private BBjString DataFingerprint$
     field private BBjNumber newW!
     field private BBjNumber newH!
+    field private BBjString lastColumnStateHash$
     rem /**
     rem  * disabled default constructor
     rem  */
@@ -532,6 +533,43 @@ class public BBjGridExWidget extends BBjWidget
         swend
     methodend
     rem /**
+    rem  * set a callback to a label
+    rem  */
+    method public void setCallback(int p_eventType!, String p_callback!)
+        #super!.setCallback(p_eventType!, p_callback!)
+
+        rem this if statement can go when https://github.com/BBj-Plugins/BBjGridExWidget/issues/72 
+        rem is resolved
+        if p_eventType!=#ON_GRID_COLUMN_STATE_CHANGE() then
+            BBjAPI().createTimer("timer"+#GRIDID$, 1, #this!, "onTimer")
+        fi
+    methodend
+    rem /**
+    rem  * set callback to a method in an object instance
+    rem  */
+    method public void setCallback(int p_eventType!, CustomObject p_snippetSetInstance!, String p_method!) 
+        #super!.setCallback(p_eventType!,p_snippetSetInstance!, p_snippetSetInstance!)
+
+        rem this if statement can go when https://github.com/BBj-Plugins/BBjGridExWidget/issues/72 
+        rem is resolved
+        if p_eventType!=#ON_GRID_COLUMN_STATE_CHANGE() then
+            BBjAPI().createTimer("timer"+#GRIDID$, 1, #this!, "onTimer")
+        fi        
+    methodend
+
+    method public void onTimer(BBjTimerEvent ev!)
+    rem this method can go when https://github.com/BBj-Plugins/BBjGridExWidget/issues/72 
+    rem is resolved
+        event! = #getColumnState()
+        md$ = java.security.MessageDigest.getInstance("MD5").digest(event!.getString())
+        if md$<> #lastColumnStateHash$ then
+            if #lastColumnStateHash$<>"" then
+                #fireEvent(#ON_GRID_COLUMN_STATE_CHANGE(),event!)
+            fi
+            #lastColumnStateHash$ = md$
+        fi
+    methodend  
+    rem /**
     rem  * set the data into the grid
     rem  * @param ResultSet: the com.basiscomponents.db.ResultSet with the data
     rem  */
@@ -1490,6 +1528,12 @@ class public BBjGridExWidget extends BBjWidget
         methodret 5007
     methodend
     rem /**
+    rem  * @return constant value to define cell double click event
+    rem  */
+    method public static BBjNumber ON_GRID_COLUMN_STATE_CHANGE()
+        methodret 5008
+    methodend    
+    rem /**
     rem  * @return constant value to define row position
     rem  */
     method public static BBjString GRID_ROWPOS_TOP()

Demo/ColumnStateDemo.bbj

@@ -20,6 +20,7 @@ wnd!        .setCallback(BBjAPI.ON_CLOSE,"byebye")
 wnd!        .setCallback(BBjAPI.ON_RESIZE,"resize")
 
 tb_get! = wnd!.addButton(300,10,3,200,25,"GET STATE")
+tb_get!.setEnabled(0)
 tb_set! = wnd!.addButton(301,230,3,200,25,"SET STATE")
 tb_refresh! = wnd!.addButton(302,450,3,200,25,"REFRESH")
 
@@ -82,7 +83,10 @@ declare SqlQueryBC sbc!
     group!.addItem("PLAYINGTIME")
     grid!.addColumnGroup("group3" , "Misc",group! , 0 , "my-group-class")
 
-    grid!.setData(rs!)    
+    grid!.setData(rs!)
+
+    grid!.setCallback(grid!.ON_GRID_COLUMN_STATE_CHANGE(),"onColumnStateChange")
+
 return
 
 byebye:
@@ -96,16 +100,20 @@ return
 getState:
     state! = grid!.getColumnState()
     clipfromstr 1,state!.toString()
-
-
+    tb_get!.setEnabled(0)
 return
 
 setState:
     if state!<>null() then
         grid!.setColumnState(state!)
     fi
+    tb_get!.setEnabled(0)
 return
 
 refresh:
     grid!.setData(rs!)
 return
+
+onColumnStateChange:
+    tb_get!.setEnabled(1)
+return