hey I have a simple UIComponent that contains some other children then
in updateDisplayList I clip the visible area of the parent
override protected function updateDisplayList(unscaledWidth:Number,
unscaledHeight:Number) : void{
super.updateDisplayList(unscaledWidth, unscaledHeight);
var boundary : Rectangle = new Rectangle(0, 0, unscaledWidth,
unscaledHeight);
this.scrollRect = boundary;
.....
and simply layout all children in some way.
for each(renderer in rendersMap.getValues()){
renderer.x = pos;
pos += renderer.width + gap;
}
//this.explicitWidth = this.width; this.explicitHeight =
this.height;
this.measuredWidth = pos - gap;
this.measuredHeight = unscaledHeight;
}
and now there is no problem as long as I use explicit values for width
and height of my component somewhere in mxml or in as3.
<mx:Canvas width="828" height="506">
<component:NavigationButton direction="right" visible="true"
width="20" height="19"
click="{projectsList.selectedAt++}" verticalCenter="0"
right="0"/>
<component:NavigationButton direction="left" visible="true"
width="20" height="19"
click="{projectsList.selectedAt--}" verticalCenter="0"
left="0"/>
<kitcomponent:List id="projectsList"
itemRenderer="{SubSectionLink}" dataProvider="{new
XMLListCollection
(applicationXML.sections.section.(@name == 'prints').project)}"
layout="horizontal" gap="2"
change="hndProjectSelected()" width="400" height="180"
x="0" y="0" /
>
</mx:Canvas>
then all values explicitW/H are set and my list is visible
but if I do something like this
<mx:Canvas width="828" height="506">
<component:NavigationButton direction="right" visible="true"
width="20" height="19"
click="{projectsList.selectedAt++}" verticalCenter="0"
right="0"/>
<component:NavigationButton direction="left" visible="true"
width="20" height="19"
click="{projectsList.selectedAt--}" verticalCenter="0"
left="0"/>
<kitcomponent:List id="projectsList"
itemRenderer="{SubSectionLink}" dataProvider="{new
XMLListCollection
(applicationXML.sections.section.(@name == 'prints').project)}"
layout="horizontal" gap="2"
change="hndProjectSelected()" left="28" right="320"
bottom="168"
top="158"/>
</mx:Canvas>
then list disappear even if I set manually in code explicit values,
what do I do wrong? but this is not a first time I notice something
like that happens, I had similar effect while working with Box
component that was stretched to it's parent size in AS3
or maybe it is because I set measured values of my component in
updatedisplayList method (where I iterate over my children anyway to
layout them) and not in measure() (where I should go through all
children additional time)
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