Qt 5.9 | Qt Virtual Keyboard | Qt Quick Virtual Keyboard - Basic Example | ScrollBar.qml Example File

Qt 5.9.4 Reference Documentation

# ScrollBar.qml Example File

basic/content/ScrollBar.qml

      /****************************************************************************
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      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
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      ** This file is part of the Qt Virtual Keyboard module of the Qt Toolkit.
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      ** $QT_BEGIN_LICENSE:GPL$
      ** Commercial License Usage
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      import QtQuick 2.0

      Item {
          property var scrollArea: parent

          width: 6
          opacity: scrollArea && scrollArea.movingVertically ? 1.0 : 0.0
          visible: scrollArea && scrollArea.contentHeight >= scrollArea.height
          anchors { right: parent.right; top: parent.top; bottom: parent.bottom; margins: 2 }

          Behavior on opacity { NumberAnimation { properties: "opacity"; duration: 600 } }

          function size() {
              var nh = scrollArea.visibleArea.heightRatio * height
              var ny = scrollArea.visibleArea.yPosition * height
              return ny > 3 ? Math.min(nh, Math.ceil(height - 3 - ny)) : nh + ny
          }
          Rectangle {
              x: 1
              y: scrollArea ? Math.max(2, scrollArea.visibleArea.yPosition * parent.height) : 0
              height: scrollArea ? size() : 0
              width: parent.width - 2
              color: Qt.rgba(1.0, 1.0, 1.0, 0.5)
              radius: 1
          }
      }