qt - Adding tabs dynamically in qml -

i'm trying dynamically create tabs in qml. code below simple example of want do.

import qtquick 2.0 import qtquick.controls 1.0  applicationwindow{     id:win      tabview{         id:tb         anchors.fill:parent          mousearea{             anchors.fill:parent             onclicked:tb.loadtab()         }          component{             id:viewcomp             rectangle{                 anchors.fill:parent                 color:"black"             }         }          function loadtab(){             var t=addtab("x",viewcomp)             t.item.color="blue" //line 20         }     } } 

addition of first tab works expected. however, after other tab added triggers error:

typeerror: cannot set property 'color' of null`.

i tried access tabwith gettab() change color, same error. can explain doing wrong?

finally got around , tried fix , successful. decided post answer in case stumbles on google , has similar problem.

the solution set currentindex new tab , set properties of tab. means function loadtab() looks this:

loadtab(){     var c_tab=currentindex     var t=tb.addtab("x",viewcomp)     currentindex=count-1     t.item.color="blue"      currentindex=c_tab } 

this works nicely.