BUG: MarkupList elements do not receive focusPercent updates in certain conditions
When using MarkupList with vertFocusAnimationStyle = "fixedFocus" and focusRow >= 3, items from i = 3 to i = focusRow do not receive focusPercent updates.
I have a MarkupList with focusRow = "3" where I change the text color of the item labels based on when the focus percent changes, however, this does not happen when I focus on the 3rd item in the list.
I assume this bug happens on all Roku devices (I only have 2 of them) and is not device-specific.
Steps to reproduce:
1. Make a MarkupList with vertFocusAnimationStyle = "fixedFocus"
2. Make a custom component which includes a label with any text as a child and add
<field id="focusPercent" type="float" onChange="onFocusChange" />
to the component interface tag
3. Add this function to the component's code:
function onFocusChange()
print "Focus %:", m.top.focusPercent
if m.top.focusPercent >= 0.5
m.testLabel.color = "0x262626FF"
else
m.testLabel.color = "0xDDDDDDFF"
end if
end function​
4. Insert at least 4 of these custom components as content to the MarkupList
5. Scroll the list and observe how the 3rd item never receives focus percent updates
6. Change the focusRow to a higher number (add additional elements to the list if you have to). Observe how items from index 3 to focusRow never receive focus percent updates (for example, when setting focusRow to 5, 3rd to 5th items do not receive focus updates)
7. When setting the focusRow to 2 or less, the list behaves as expected and all items receive focus percent updates.
My code if you would like to try it out yourself:
<MarkupList
id="testMarkupList"
itemComponentName="TestElement"
vertFocusAnimationStyle="fixedFocus"
focusRow="3">
<ContentNode id="testMarkupListContent" role="content">
<ContentNode title="0" />
<ContentNode title="1" />
<ContentNode title="2" />
<ContentNode title="3" />
<ContentNode title="4" />
<ContentNode title="5" />
<ContentNode title="6" />
<ContentNode title="7" />
</ContentNode>
</MarkupList>
TestElement.xml:
<?xml version="1.0" encoding="utf-8" ?>
<component name="TestElement" extends="Group">
<script type="text/brightscript" uri="TestElement.brs" />
<interface>
<field id="itemContent" type="node" onChange="showContent" />
<field id="focusPercent" type="float" onChange="onFocusChange" />
</interface>
<children>
<Label id="testLabel"></Label>
</children>
</component>
TestElement.brs:
sub init()
m.testLabel = m.top.findNode("testLabel")
end sub
function showContent()
m.testLabel.text = m.top.itemContent.title
end function
function onFocusChange()
print "Focus %:", m.top.focusPercent
if m.top.focusPercent >= 0.5
m.testLabel.color = "0x262626FF"
else
m.testLabel.color = "0xDDDDDDFF"
end if
end function
