TabWidget.qml Example File

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  import QtQuick 1.0

  /*!
      \qmltype TabWidget
      \inqmlmodule UIComponents
      \brief A widget that places its children as tabs

      A TabWidget places its children as tabs in a view. Selecting
      a tab involves selecting the tab at the top.

      The TabWidget component is part of the \l {UI Components} module.

      This documentation is part of the \l{componentset}{UIComponents} example.

      \section1 Adding Tabs

      To add a tab, declare the tab as a child of the TabWidget.

      \code
      TabWidget {
          id: tabwidget

          Rectangle {
              id: tab1
              color: "red"
              //... omitted
          }
          Rectangle {
              id: tab2
              color: "blue"
              //... omitted
          }

      }
      \endcode

  */
  Item {
      id: tabWidget

      /*!
      \internal

      Setting the default property to stack.children means any child items
      of the TabWidget are actually added to the 'stack' item's children.

      See the \l{"Property Binding in QML"}
      documentation for details on default properties.

      This is an implementation detail, not meant for public knowledge. Putting
      the \internal command at the beginning will cause QDoc to not publish this
      documentation in the public API page.

      Normally, a property alias needs to have a
      "\qmlproperty <type> <propertyname>" to assign the alias a type.

      */
      default property alias content: stack.children

      /*!
          The currently active tab in the TabWidget.
      */
      property int current: 0

      /*!
          A sample \c{read-only} property.
          A contrived property to demonstrate QDoc's ability to detect
          read-only properties.

          The signature is:
          \code
          readonly property int sampleReadOnlyProperty: 0
          \endcode

          Note that the property must be initialized to a value.

      */
      readonly property int sampleReadOnlyProperty: 0

      /*!
      \internal

      This handler is an implementation
      detail. The \c{\internal} command will prevent QDoc from publishing this
      documentation on the public API.
      */
      onCurrentChanged: setOpacities()
      Component.onCompleted: setOpacities()

      /*!
      \internal

      An internal function to set the opacity.
      The \internal command will prevent QDoc from publishing this
      documentation on the public API.
      */
      function setOpacities() {
          for (var i = 0; i < stack.children.length; ++i) {
              stack.children[i].opacity = (i == current ? 1 : 0)
          }
      }

      Row {
          id: header

          Repeater {
              model: stack.children.length
              delegate: Rectangle {
                  width: tabWidget.width / stack.children.length; height: 36

                  Rectangle {
                      width: parent.width; height: 1
                      anchors { bottom: parent.bottom; bottomMargin: 1 }
                      color: "#acb2c2"
                  }
                  BorderImage {
                      anchors { fill: parent; leftMargin: 2; topMargin: 5; rightMargin: 1 }
                      border { left: 7; right: 7 }
                      source: "tab.png"
                      visible: tabWidget.current == index
                  }
                  Text {
                      horizontalAlignment: Qt.AlignHCenter; verticalAlignment: Qt.AlignVCenter
                      anchors.fill: parent
                      text: stack.children[index].title
                      elide: Text.ElideRight
                      font.bold: tabWidget.current == index
                  }
                  MouseArea {
                      anchors.fill: parent
                      onClicked: tabWidget.current = index
                  }
              }
          }
      }

      Item {
          id: stack
          width: tabWidget.width
          anchors.top: header.bottom; anchors.bottom: tabWidget.bottom
      }
  }