ControlView.qml Example File

  /****************************************************************************
  **
  ** Copyright (C) 2016 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
  **
  ** This file is part of the examples of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** Commercial License Usage
  ** Licensees holding valid commercial Qt licenses may use this file in
  ** accordance with the commercial license agreement provided with the
  ** Software or, alternatively, in accordance with the terms contained in
  ** a written agreement between you and The Qt Company. For licensing terms
  ** and conditions see https://www.qt.io/terms-conditions. For further
  ** information use the contact form at https://www.qt.io/contact-us.
  **
  ** BSD License Usage
  ** Alternatively, you may use this file under the terms of the BSD license
  ** as follows:
  **
  ** "Redistribution and use in source and binary forms, with or without
  ** modification, are permitted provided that the following conditions are
  ** met:
  **   * Redistributions of source code must retain the above copyright
  **     notice, this list of conditions and the following disclaimer.
  **   * Redistributions in binary form must reproduce the above copyright
  **     notice, this list of conditions and the following disclaimer in
  **     the documentation and/or other materials provided with the
  **     distribution.
  **   * Neither the name of The Qt Company Ltd nor the names of its
  **     contributors may be used to endorse or promote products derived
  **     from this software without specific prior written permission.
  **
  **
  ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
  **
  ** $QT_END_LICENSE$
  **
  ****************************************************************************/

  import QtQuick 2.2
  import QtQuick.Controls 1.1

  Rectangle {
      id: view
      color: darkBackground ? "transparent" : lightBackgroundColor

      Keys.onReleased: {
          if (event.key === Qt.Key_Back) {
              stackView.pop();
              event.accepted = true;
          }
      }

      property bool darkBackground: true

      property Component control
      property Component customizer

      property alias controlItem: controlLoader.item
      property alias customizerItem: customizerLoader.item

      property bool isCustomizerVisible: false

      property real margin: root.toPixels(0.05)

      property rect controlBounds: Qt.rect(largestControlItem.x + controlBoundsItem.x,
          largestControlItem.y + controlBoundsItem.y, controlBoundsItem.width, controlBoundsItem.height)

      Item {
          id: largestControlItem
          x: margin
          y: margin
          width: isCustomizerVisible ? widthWhenCustomizing : widthWhenNotCustomizing
          height: isCustomizerVisible ? heightWhenCustomizing : heightWhenNotCustomizing

          readonly property real widthWhenCustomizing: (!isScreenPortrait ? parent.width / 2 : parent.width) - margin * 2
          readonly property real heightWhenCustomizing: (isScreenPortrait ? parent.height / 2 : parent.height - toolbar.height) - margin * 2
          readonly property real widthWhenNotCustomizing: parent.width - margin * 2
          readonly property real heightWhenNotCustomizing: parent.height - toolbar.height - margin * 2

          Item {
              id: controlBoundsItem
              x: parent.width / 2 - controlBoundsItem.width / 2
              y: customizer && customizerItem.visible ? 0 : (isScreenPortrait ? (parent.height / 2) - (controlBoundsItem.height / 2) : 0)
              width: Math.min(parent.widthWhenCustomizing, parent.widthWhenNotCustomizing)
              height: Math.min(parent.heightWhenCustomizing, parent.heightWhenNotCustomizing)

              Behavior on x {
                  id: controlXBehavior
                  enabled: false
                  NumberAnimation {}
              }

              Behavior on y {
                  id: controlYBehavior
                  enabled: false
                  NumberAnimation {}
              }

              Loader {
                  id: controlLoader
                  sourceComponent: control
                  anchors.centerIn: parent

                  property alias view: view
              }
          }
      }

      Flickable {
          id: flickable
          // Hide the customizer on the right of the screen if it's not visible.
          x: (isScreenPortrait ? 0 : (isCustomizerVisible ? largestControlItem.x + largestControlItem.width + margin : view.width)) + margin
          y: (isScreenPortrait ? largestControlItem.y + largestControlItem.height : 0) + margin
          width: largestControlItem.width
          height: parent.height - y - toolbar.height - margin
          anchors.leftMargin: margin
          anchors.rightMargin: margin
          visible: customizerLoader.opacity > 0

          flickableDirection: Flickable.VerticalFlick

          clip: true
          contentWidth: width
          contentHeight: customizerLoader.height

          Behavior on x {
              id: flickableXBehavior
              enabled: false
              NumberAnimation {}
          }

          Behavior on y {
              id: flickableYBehavior
              enabled: false
              NumberAnimation {}
          }

          Loader {
              id: customizerLoader
              sourceComponent: customizer
              opacity: 0
              width: flickable.width

              property alias view: view

              Behavior on opacity {
                  NumberAnimation {
                      duration: 300
                  }
              }
          }
      }

      ControlViewToolbar {
          id: toolbar

          onCustomizeClicked: {
              controlXBehavior.enabled = !isScreenPortrait;
              controlYBehavior.enabled = isScreenPortrait;

              isCustomizerVisible = !isCustomizerVisible;

              if (isScreenPortrait) {
                  flickableXBehavior.enabled = false;
                  flickableYBehavior.enabled = true;
              } else {
                  flickableXBehavior.enabled = true;
                  flickableYBehavior.enabled = false;
              }

              customizerLoader.opacity = isCustomizerVisible ? 1 : 0;
          }
      }

      FlickableMoreIndicator {
          flickable: flickable
          atTop: true
          gradientColor: view.darkBackground ? darkBackgroundColor : lightBackgroundColor
      }

      FlickableMoreIndicator {
          flickable: flickable
          atTop: false
          gradientColor: view.darkBackground ? darkBackgroundColor : lightBackgroundColor
      }
  }