Checkbox does not display properly in Flex - apache-flex

Question

I have a checkbox that does not render as a checkbox and would be displayed as something similar to a button. However, it behaves like a checkbox where I can select it and the handler works with the firing event.
Here is my checkbox. I also tried it outside the or , but it has the same behavior. There is no CSS related to checkbox or the part that I am working on. I am using Flex 4.5 though.
1- Has anybody encounter such a problem?
2- Is there any way to enforce the layout inside a container and item renderer?
<mx:HBox>
<mx:CheckBox id="Test"
label="Label"
fontWeight="bold"
change="Test_changeHandler(event)"/>
</mx:HBox>

Answer 1

If you're using Flex 4.5, why are you using Flex 3 components? Change this to spark components and everything should be much better:
<s:HGroup>
<s:CheckBox id="Test"
label="Label"
fontWeight="bold"
change="Test_changeHandler(event)"/>
</s:HGroup>

Answer 2

mx:CheckBox extends mx:Button, so if you put added css that skinned mx:Button, mx:CheckBox would also get it. It's a shortcoming of flex 3 skinning. You can workaround by explicitly setting the mx:CheckBox skin.
Edit: try this
<mx:HBox>
<mx:CheckBox id="Test"
label="Label"
fontWeight="bold"
skin="{mx.skins.spark.CheckBoxSkin}"
change="Test_changeHandler(event)"
/>
</mx:HBox>

Answer 3

This happend to me also. Fix was to use a mx:Container as parent instead of FlexGlobals.application on the popup component.

Answer 4

for the second question:
I had exactly the same problem and i forced it to take the "original" skin with:
var skinClass:Class = mx.skins.spark.CheckBoxSkin;
theCheckBoxInstance.setStyle("skin", skinClass);
Because in my case the CheckBox was an ItemRenderer for a DataGrid, I've put it in the overridden createChildren methode right after the super call..
I have no explication why this happens. I encountered it in an old monster project where I was charged to make some changes...