Qt 5.9 | Qt Quick | Qt Quick Examples - Animation | behavior-example.qml Example File

Qt 5.9.9 Reference Documentation

# behavior-example.qml Example File

animation/behaviors/behavior-example.qml

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      import QtQuick 2.0

      Rectangle {
          width: 320; height: 480
          color: "#343434"

          Rectangle {
              anchors.centerIn: parent
              width: 200; height: 200
              radius: 30
              color: "transparent"
              border.width: 4; border.color: "white"

              SideRect {
                  id: leftRect
                  anchors { verticalCenter: parent.verticalCenter; horizontalCenter: parent.left }
                  text: "Left"
              }

              SideRect {
                  id: rightRect
                  anchors { verticalCenter: parent.verticalCenter; horizontalCenter: parent.right }
                  text: "Right"
              }

              SideRect {
                  id: topRect
                  anchors { verticalCenter: parent.top; horizontalCenter: parent.horizontalCenter }
                  text: "Top"
              }

              SideRect {
                  id: bottomRect
                  anchors { verticalCenter: parent.bottom; horizontalCenter: parent.horizontalCenter }
                  text: "Bottom"
              }

              Rectangle {
                  id: focusRect

                  property string text

                  x: 62; y: 75; width: 75; height: 50
                  radius: 6
                  border.width: 4; border.color: "white"
                  color: "firebrick"

                  // Set an 'elastic' behavior on the focusRect's x property.
                  Behavior on x {
                      NumberAnimation { easing.type: Easing.OutElastic; easing.amplitude: 3.0; easing.period: 2.0; duration: 300 }
                  }

                  // Set an 'elastic' behavior on the focusRect's y property.
                  Behavior on y {
                      NumberAnimation { easing.type: Easing.OutElastic; easing.amplitude: 3.0; easing.period: 2.0; duration: 300 }
                  }

                  Text {
                      id: focusText
                      text: focusRect.text
                      anchors.centerIn: parent
                      color: "white"
                      font.pixelSize: 16; font.bold: true

                      // Set a behavior on the focusText's x property:
                      // Set the opacity to 0, set the new text value, then set the opacity back to 1.
                      Behavior on text {
                          SequentialAnimation {
                              NumberAnimation { target: focusText; property: "opacity"; to: 0; duration: 150 }
                              NumberAnimation { target: focusText; property: "opacity"; to: 1; duration: 150 }
                          }
                      }
                  }
              }
          }
      }