Qt 5.9 | QDoc Manual | QML Documentation Example | Switch.qml Example File

Qt 5.9.2 Reference Documentation

# Switch.qml Example File

componentset/Switch.qml

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      import QtQuick 1.0

      /*!
          \qmltype ToggleSwitch
          \inqmlmodule UIComponents
          \brief A component that can be turned on or off

          A toggle switch has two states: an \c on and an \c off state. The \c off
          state is when the \l on property is set to \c false.

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

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

      */
      Item {
          id: toggleswitch
          width: background.width; height: background.height

          /*!
             Indicates the state of the switch. If \c false, then the switch is in
             the \c off state.

             \omit
                  The \qmlproperty <type> <propertyname> is not necessary as QDoc
                  will associate this property to the ToggleSwitch

                 QDoc will not publish the documentation within omit and endomit.
             \endomit
          */
          property bool on: false

          /*!
              A method to toggle the switch. If the switch is \c on, the toggling it
              will turn it \c off. Toggling a switch in the \c off position will
              turn it \c on.
          */
          function toggle() {
              if (toggleswitch.state == "on")
                  toggleswitch.state = "off";
              else
                  toggleswitch.state = "on";
          }

          /*!
              \internal

              An internal function to synchronize the switch's internals. This
              function is not for public access. The \internal command will
              prevent QDoc from publishing this comment in the public API.
          */
          function releaseSwitch() {
              if (knob.x == 1) {
                  if (toggleswitch.state == "off") return;
              }
              if (knob.x == 78) {
                  if (toggleswitch.state == "on") return;
              }
              toggle();
          }

          Rectangle {
              id: background
              width: 130; height: 48
              radius: 48
              color: "lightsteelblue"
              MouseArea { anchors.fill: parent; onClicked: toggle() }
          }

          Rectangle {
              id: knob
              width: 48; height: 48
              radius: width
              color: "lightblue"

              MouseArea {
                  anchors.fill: parent
                  drag.target: knob; drag.axis: Drag.XAxis; drag.minimumX: 1; drag.maximumX: 78
                  onClicked: toggle()
                  onReleased: releaseSwitch()
              }
          }

          states: [
              State {
                  name: "on"
                  PropertyChanges { target: knob; x: 78 }
                  PropertyChanges { target: toggleswitch; on: true }
              },
              State {
                  name: "off"
                  PropertyChanges { target: knob; x: 1 }
                  PropertyChanges { target: toggleswitch; on: false }
              }
          ]

          transitions: Transition {
              NumberAnimation { properties: "x"; easing.type: Easing.InOutQuad; duration: 200 }
          }
      }