feat: adds ability to update list content via a ListContent.version f…

…ield

src/components/ml/list/models/ListContent.xml

@@ -19,6 +19,10 @@
     <field
         id='isHidden'
         type='boolean' />
+    <field
+        id='version'
+        type='integer'
+        value='0' />
 
   </interface>
 

src/source/ml/BaseRow.bs

@@ -71,10 +71,12 @@ namespace ml
       m.log.info("onContentChange")
       if m.isInitialized
         if m._content = invalid or not m._content.isSameNode(m.content)
+          'was no content or it changed
           m._content = m.content
           m.settings = ml.listMixin.getRowSettings(m.owner.content, m._content)
           m.onContentChange(m._content)
         else if m._content <> invalid
+          'is the same content
           isListRefreshNeeded = false
 
           if m.wasHidden <> m._content.isHidden

src/source/ml/HorizontalRow.bs

@@ -165,7 +165,6 @@ namespace ml
           m.header = m.componentPool@.getComponent(headerSettings.compName, 1)
 
           if m.header <> invalid
-            m.header.id = "header"
             if headerSettings.position = "onTop"
               m.foregroundGroup.appendChild(m.header)
             else if headerSettings.position = "underneath"
@@ -188,8 +187,9 @@ namespace ml
 
     private function cleanHeader()
       if m.header <> invalid
-        m.componentPool@.releaseComponents(m.header)
-        m.header.getParent().removeChild(m.header)
+        m.log.info("cleaning header")
+        m.header@.setContent(invalid)
+        m.componentPool@.releaseComponent(m.header)
         m.header = invalid
         m.currentHeaderType = invalid
       end if

src/source/ml/ItemScroller.bs

@@ -19,6 +19,7 @@ namespace ml
     public lastRCMap = {}
     public nextRCMap = {}
     public index = 0
+    public focusedItem as mc.types.node
     public indexPosition = 0
     public focusedIndex = 0
     public nextIndex = 0
@@ -278,9 +279,6 @@ namespace ml
         m.container.translation = targetTranslation
         'TODO -check if jump is bigger than a certain amount
         ' m.viewManager.updateRenderedComponents(m.direction, m.index)
-        if m.isList
-          ? ":1111 "; index
-        end if
         ' m.setNextIndex(index)
         m.viewManager.updateRenderedComponents(m.direction, index)
         ' m.setFocusIndex(index, false)
@@ -495,6 +493,8 @@ namespace ml
         m.setNextIndex(m.index + m.direction)
       end if
 
+      m.focusedItem = m.viewManager.visibleItems[index]
+
       #if use_debug_hacks
         mioc.setInstance("_index", m.index)
         mioc.setInstance("_nextIndex", m.nextIndex)

src/source/ml/ItemViewManager.bs

@@ -63,6 +63,7 @@ namespace ml
     end function
 
     public function reset()
+      m.log.info ("resetting base.itemViewManager", m.__classname)
       m.content = invalid
       m.components = []
       m.rects = []
@@ -110,6 +111,10 @@ namespace ml
       end if
     end function
 
+    'call this method when the content has changed in some way
+    function onContentUpdated()
+    end function
+
     function _createRenderers(content as mc.types.node) as boolean
       m.components = []
       m.visibleComponents = []
@@ -121,17 +126,11 @@ namespace ml
     protected function onRenderersCreated()
       m.isRendering = false
       m._updateLayout()
-      m.numberOfItems = m.visibleItems.count()
     end function
 
     function _updateLayout()
       m.log.info("_updateLayout")
       m.updateScreenRect()
-
-      m.visibleComponents = []
-      m.visibleItems = []
-      m.rects = []
-
       m.updateLayout()
     end function
 
@@ -417,6 +416,7 @@ namespace ml
 
     function getRect(index as integer, useScreenCoords = false as boolean)
       rect = m.rects[index]
+
       if rect <> invalid
         screenRect = {
           size: [rect.size[0], rect.size[1]]

src/source/ml/List.bs

@@ -206,12 +206,25 @@ namespace ml
 
     private function onContentChange()
       m.log.info("onContentChange")
-      if m.isInitialized and (m._content = invalid or not m._content.isSameNode(m.content))
-        m._content = m.content
-        m.resetState()
+      if m.isInitialized
+        if m._content <> invalid and not m._content.isSameNode(m.content)
+          m.unobserveNodeField(m._content, "version", m.onContentUpdated)
+        end if
+        if m._content = invalid or not m._content.isSameNode(m.content)
+          m._content = m.content
+          m.observeNodeField(m._content, "version", m.onContentUpdated, "none")
+          m.resetState()
+        else
+          ' m.log.info("current content has changed in some way!")
+        end if
       end if
     end function
 
+    private function onContentUpdated()
+      m.log.info("This content has changed in some way")
+      m.viewManager.onContentUpdated()
+    end function
+
     private function onAnimateToRowIndexChange(index as integer)
       if m.content <> invalid and index <> -1
         m.itemScroller.moveToIndex(index)