Varsha is almost right. That is the way you would need to change the label for a TabPane in a TabContainer. However she missed one important part here. Note that a CommandButton will consume the PointerPress and PointerRelease events and hence the TabContainer will never get a chance to see it and so the Tabs will not be changed when you click on a TabPane with a CommandButton Label. Here is some code that shows you how to fix the problem:

In the example below I have two TabPanes with labels as a CommandButton. In Curl 6.0, a CommandButton can fire an Action event on a PointerPress. I am adding this case here because, normally, a TabContainer switches its Tabs when a PointerPress is done on a Label.

{curl 6.0, 7.0 applet}
{curl-file-attributes character-encoding = "utf8"}
 
{let constant tp1:TabPane =
    {TabPane
        label =
            {CommandButton
                label = "On pointer Release",
                {on Action do
                    {if-non-null tc = tp1.tab-container then
                        {tc.show-pane tp1}
                    }
                }
            },
        tab-button-tooltip = "first tab",
        {TextFlowBox font-size = 28pt, "1"}
    }
}
 
{let constant tp3:TabPane =
    {TabPane
        label =
            {CommandButton
                label = "On PointerPress",
                fire-on-press? = true,
                {on Action do
                    {if-non-null tc = tp3.tab-container then
                        {tc.show-pane tp3}
                    }
                }
            },
        tab-button-tooltip = "third tab",
        {TextFlowBox font-size = 28pt, "3"}
    }
}
 
 
{TabContainer
    tp1,
    {TabPane
        label = "2",
        tab-button-tooltip = "second tab",
        show? = true,
        {TextFlowBox font-size = 28pt, "2"}
    },
    tp3
}
 
 

Message was edited by: Kamal