Support left, right navigation while viewing photos

components/ItemGrid/ItemGrid.brs

@@ -724,9 +724,10 @@ function onKeyEvent(key as string, press as boolean) as boolean
             return true
         else if itemToPlay <> invalid and itemToPlay.type = "Photo"
             ' Spawn photo player task
-            photoPlayer = CreateObject("roSgNode", "PhotoPlayerTask")
-            photoPlayer.itemContent = itemToPlay
-            photoPlayer.control = "RUN"
+            photoPlayer = CreateObject("roSgNode", "PhotoDetails")
+            photoPlayer.items = markupGrid
+            photoPlayer.itemIndex = markupGrid.itemFocused
+            m.global.sceneManager.callfunc("pushScene", photoPlayer)
             return true
         end if
     else if key = "left" and topGrp.isinFocusChain()

components/photos/PhotoDetails.brs

@@ -1,13 +1,17 @@
 sub init()
     m.top.optionsAvailable = false ' Change once Shuffle option is added
     m.top.overhangVisible = false
+    itemContentChanged()
 end sub
 
 sub itemContentChanged()
-    m.LoadLibrariesTask = createObject("roSGNode", "LoadPhotoTask")
-    m.LoadLibrariesTask.itemContent = m.top.itemContent
-    m.LoadLibrariesTask.observeField("results", "onPhotoLoaded")
-    m.LoadLibrariesTask.control = "RUN"
+    if isValidToContinue(m.top.itemIndex)
+        m.LoadLibrariesTask = createObject("roSGNode", "LoadPhotoTask")
+        itemContent = m.top.items.content.getChild(m.top.itemIndex)
+        m.LoadLibrariesTask.itemContent = itemContent
+        m.LoadLibrariesTask.observeField("results", "onPhotoLoaded")
+        m.LoadLibrariesTask.control = "RUN"
+    end if
 end sub
 
 sub onPhotoLoaded()
@@ -19,3 +23,33 @@ sub onPhotoLoaded()
         message_dialog("This image type is not supported.")
     end if
 end sub
+
+function onKeyEvent(key as string, press as boolean) as boolean
+    if not press then return false
+
+    if key = "right"
+        if isValidToContinue(m.top.itemIndex + 1)
+            m.top.itemIndex++
+        end if
+        return true
+    end if
+
+    if key = "left"
+        if isValidToContinue(m.top.itemIndex - 1)
+            m.top.itemIndex--
+        end if
+        return true
+    end if
+
+    return false
+end function
+
+function isValidToContinue(index as integer)
+    if isValid(m.top.items) and isValid(m.top.items.content)
+        if index >= 0 and index < m.top.items.content.getChildCount()
+            return true
+        end if
+    end if
+
+    return false
+end function

components/photos/PhotoDetails.xml

@@ -6,7 +6,8 @@
     </LayoutGroup>
   </children>
   <interface>
-    <field id="itemContent" type="node" onChange="itemContentChanged" />
+    <field id="items" type="node" />
+    <field id="itemIndex" type="integer" value="-1" onChange="itemContentChanged" />
   </interface>
   <script type="text/brightscript" uri="PhotoDetails.brs" />
   <script type="text/brightscript" uri="pkg:/source/utils/misc.brs" />

components/photos/PhotoPlayerTask.brs

@@ -1,17 +0,0 @@
-sub init()
-    m.top.functionName = "loadItems"
-end sub
-
-sub loadItems()
-    item = m.top.itemContent
-
-    group = CreateObject("roSGNode", "PhotoDetails")
-    group.optionsAvailable = false
-    m.global.sceneManager.callFunc("pushScene", group)
-
-    group.itemContent = item
-
-    ' TODO/FIXME:
-    ' Wait some time and move to the next photo...
-
-end sub

components/photos/PhotoPlayerTask.xml

@@ -1,8 +0,0 @@
-<?xml version="1.0" encoding="utf-8" ?>
-
-<component name="PhotoPlayerTask" extends="Task">
-  <interface>
-    <field id="itemContent" type="node" />
-  </interface>
-  <script type="text/brightscript" uri="PhotoPlayerTask.brs" />
-</component>