//main.qml
Qt Code: 
  1. import Qt 4.7
  2. import "content"
  3.  
  4. Rectangle {
  5.  
  6.     width: 480; height: 480
  7.     property int hr
  8.     property int min
  9.     property int am
  10.  
  11.         signal titleBarClicked(int hr,int min,int am)
  12.  
  13.  
  14.     Row {
  15.         y: 0; x: 0; spacing: 20
  16.  
  17.         Spinner {
  18.             id: spinner
  19.  
  20.             width: 60; height: 240
  21.             focus: false
  22.  
  23.             model: 13
  24.             itemHeight: 30
  25.  
  26.             delegate: Text { font.pixelSize: 25; text: index; height: 30 }
  27.  
  28.  
  29.         }
  30.  
  31.  
  32.         //Text { text: "Current item index: " + spinner.currentIndex }
  33.  
  34.     }
  35.     Row {
  36.         y: 0; x: 80; spacing: 20
  37.  
  38.         Spinner {
  39.             id: spinner2
  40.             width: 60; height: 240
  41.             focus: true
  42.             model: 60
  43.             itemHeight: 30
  44.             delegate: Text { font.pixelSize: 25; text: index; height: 30 }
  45.         }
  46.  
  47.  
  48.        // Text { text: "Current item index: " + spinner2.currentIndex }
  49.  
  50.     }
  51.     Row {
  52.         y: 0; x: 160; spacing: 20
  53.  
  54.         Spinner {
  55.             id: spinner3
  56.             width: 60; height: 240
  57.             focus: true
  58.             model: name1
  59.             itemHeight: 30
  60.  
  61.             delegate: Text {font.pixelSize: 25; text: "PM"; height: 30 }
  62.  
  63.  
  64.             Text {
  65.                 id: name1
  66.                 text: ""
  67.             }
  68.  
  69.  
  70.  
  71.  
  72.  
  73.  
  74.         }
  75.  
  76.  
  77.  
  78.  
  79.      //   Text { text: "Current item index: " + spinner3.currentIndex }
  80.  
  81.     }
  82.  
  83.  
  84.  
  85.  
  86.  
  87.  
  88.  
  89.     Column {
  90.         y: 150; x: 220; spacing: 20
  91.         Image {
  92.             id: image1
  93.             source: "content/forward.png"
  94.  
  95.             MouseArea {
  96.                 id:mousearea
  97.                 anchors.fill: parent
  98.                 acceptedButtons: Qt.LeftButton | Qt.RightButton|Qt.MiddleButton
  99.                 onReleased: {
  100.  
  101.                     titleBarClicked(spinner.currentIndex,spinner2.currentIndex,spinner3.currentIndex)
  102.                     console.log("First currentIndex = "+ spinner.currentIndex )
  103.                     console.log("Second currentIndex = "+ spinner2.currentIndex )
  104.                     console.log("currentIndex = "+ spinner3.currentIndex )
  105.  
  106.                             }
  107.  
  108.             }
  109.  
  110.         }
  111.  
  112.  
  113.  
  114.  
  115.  
  116.  
  117.  
  118.  
  119.  
  120.     }
  121.  
  122.  
  123.  
  124.  
  125.  
  126.  
  127. }
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.cpp file integration qt with qml
Qt Code: 
  1. QDeclarativeView *qView=new QDeclarativeView(ui->graphicsView);
  2.     qView->setSource(QString("main.qml"));
  3.     QGraphicsObject *obj =qView->rootObject();
  4.      connect ( obj,SIGNAL(titleBarClicked(int,int,int)), this, SLOT(timecal(int,int,int)));
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error:

visual studio runtime error

error displayed on qt console

QGraphicsItem::ungrabMouse: not a mouse grabber
ASSERT: "!implicit" in file graphicsview\qgraphicsscene.cpp, line 906

when click and drag on the sides of spinners no error is displayed . but when clicked and dragged exactly on the spinner the above errors are displayed.
what should I do?