dynamiclist.qml Example File

  /****************************************************************************
  **
  ** Copyright (C) 2015 The Qt Company Ltd.
  ** Contact: http://www.qt.io/licensing/
  **
  ** This file is part of the examples of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** 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 2.0
  import "content"

  // This example shows how items can be dynamically added to and removed from
  // a ListModel, and how these list modifications can be animated.

  Rectangle {
      id: container
      width: 500; height: 400
      color: "#343434"

      // The model:
      ListModel {
          id: fruitModel

          ListElement {
              name: "Apple"; cost: 2.45
              attributes: [
                  ListElement { description: "Core" },
                  ListElement { description: "Deciduous" }
              ]
          }
          ListElement {
              name: "Banana"; cost: 1.95
              attributes: [
                  ListElement { description: "Tropical" },
                  ListElement { description: "Seedless" }
              ]
          }
          ListElement {
              name: "Cumquat"; cost: 3.25
              attributes: [
                  ListElement { description: "Citrus" }
              ]
          }
          ListElement {
              name: "Durian"; cost: 9.95
              attributes: [
                  ListElement { description: "Tropical" },
                  ListElement { description: "Smelly" }
              ]
          }
      }

      // The delegate for each fruit in the model:
      Component {
          id: listDelegate
          Item {
              id: delegateItem
              width: listView.width; height: 80
              clip: true

              Column {
                  id: arrows
                  anchors {
                      left: parent.left
                      verticalCenter: parent.verticalCenter
                  }
                  Image {
                      source: "content/pics/arrow-up.png"
                      MouseArea { anchors.fill: parent; onClicked: fruitModel.move(index, index-1, 1) }
                  }
                  Image { source: "content/pics/arrow-down.png"
                      MouseArea { anchors.fill: parent; onClicked: fruitModel.move(index, index+1, 1) }
                  }
              }

              Column {
                  anchors {
                      left: arrows.right
                      horizontalCenter: parent.horizontalCenter;
                      bottom: parent.verticalCenter
                  }

                  Text {
                      anchors.horizontalCenter: parent.horizontalCenter
                      text: name
                      font.pixelSize: 15
                      color: "white"
                  }
                  Row {
                      anchors.horizontalCenter: parent.horizontalCenter
                      spacing: 5
                      Repeater {
                          model: attributes
                          Text { text: description; color: "White" }
                      }
                  }
              }

              Item {
                  anchors {
                      left: arrows.right
                      horizontalCenter: parent.horizontalCenter;
                      top: parent.verticalCenter
                      bottom: parent.bottom
                  }

                  Row {
                      anchors.centerIn: parent
                      spacing: 10

                      PressAndHoldButton {
                          anchors.verticalCenter: parent.verticalCenter
                          source: "content/pics/plus-sign.png"
                          onClicked: fruitModel.setProperty(index, "cost", cost + 0.25)
                      }

                      Text {
                          id: costText
                          anchors.verticalCenter: parent.verticalCenter
                          text: '$' + Number(cost).toFixed(2)
                          font.pixelSize: 15
                          color: "white"
                          font.bold: true
                      }

                      PressAndHoldButton {
                          anchors.verticalCenter: parent.verticalCenter
                          source: "content/pics/minus-sign.png"
                          onClicked: fruitModel.setProperty(index, "cost", Math.max(0,cost-0.25))
                      }

                      Image {
                          source: "content/pics/list-delete.png"
                          MouseArea { anchors.fill:parent; onClicked: fruitModel.remove(index) }
                      }
                  }
              }

              // Animate adding and removing of items:
              ListView.onAdd: SequentialAnimation {
                  PropertyAction { target: delegateItem; property: "height"; value: 0 }
                  NumberAnimation { target: delegateItem; property: "height"; to: 80; duration: 250; easing.type: Easing.InOutQuad }
              }

              ListView.onRemove: SequentialAnimation {
                  PropertyAction { target: delegateItem; property: "ListView.delayRemove"; value: true }
                  NumberAnimation { target: delegateItem; property: "height"; to: 0; duration: 250; easing.type: Easing.InOutQuad }

                  // Make sure delayRemove is set back to false so that the item can be destroyed
                  PropertyAction { target: delegateItem; property: "ListView.delayRemove"; value: false }
              }
          }
      }

      // The view:
      ListView {
          id: listView
          anchors {
              left: parent.left; top: parent.top;
              right: parent.right; bottom: buttons.top;
              margins: 20
          }
          model: fruitModel
          delegate: listDelegate
      }

      Row {
          id: buttons
          anchors { left: parent.left; bottom: parent.bottom; margins: 20 }
          spacing: 10

          TextButton {
              text: "Add an item"
              onClicked: {
                  fruitModel.append({
                      "name": "Pizza Margarita",
                      "cost": 5.95,
                      "attributes": [{"description": "Cheese"}, {"description": "Tomato"}]
                  })
              }
          }

          TextButton {
              text: "Remove all items"
              onClicked: fruitModel.clear()
          }
      }
  }