Hi Guyz
I am struck with this simple logic in assigning selected child checkbox values to header checkbox values.This requiremnet is as simple as we see in our daily life i.e., When i select/unselect Header Checkbox all child checkboxes has to be selected/unselected. I could do the above requiremnet. Going further ,when i deselect any of the child checkbox ,header checkbox has to be deselected.I could not achieve the same.Can you guys help me in achieving this as i am struggling for few days. Here i add my source code which i am able to select/deselect child checkbox wen i change header checkbox accordingly.



Qt Code: 
  1. Rectangle{
  2.         id: header
  3.         width: 620
  4.         height: 70
  5.         y: 150
  6.         color: "#E8E8E8"
  7.         anchors{left: parent.left;leftMargin: 110;top:separator.bottom}
  8.  
  9.         CheckBox {
  10.             id: headerCombo
  11.             text: qsTr("Select All")
  12.             checked: false
  13.             anchors{left: parent.left;leftMargin: 38;top:parent.top;topMargin: 20}
  14.  
  15.             onCheckedChanged: {
  16.                 for(var i=0;i<checkBoxModel.count;i++)
  17.                 {
  18.                     checkBoxModel.set(i,{"selected": headerCombo.checked})
  19.                 }
  20.             }
  21.         }
  22.     }
  23.  
  24.     ListModel {
  25.         id: checkBoxModel
  26.         ListElement { selected: false; }
  27.         ListElement { selected: false; }
  28.         ListElement { selected: false; }
  29.         ListElement { selected: false; }
  30.         ListElement { selected: false; }
  31.         ListElement { selected: false; }
  32.     }
  33.  
  34.  
  35.     ListView{
  36.         id: listt
  37.         model: checkBoxModel
  38.         clip:true
  39.         width: 620
  40.         anchors{left: parent.left;leftMargin: 110;top: header.bottom;topMargin: 10;bottom: bottomBar.top}
  41.         delegate: listDelegate
  42.     }
  43.  
  44.     Component {
  45.         id: listDelegate
  46.         Item {
  47.             id: name
  48.             width: 620
  49.             height: 70
  50.  
  51.             CheckBox {
  52.                 id: childCombo
  53.                 text: qsTr("Select All")
  54.                 checked: selected
  55.                 anchors{left: parent.left;leftMargin: 38;top:parent.top;topMargin: 20}
  56.             }
  57.         }
  58.     }
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Regards
Bala Beemaneni