dragselection.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 QtQml.Models 2.1

  Item {
      id: root

      width: 320
      height: 480

      property bool dragging: false

      Component {
          id: packageDelegate
          Package {
              id: packageRoot

              MouseArea {
                  id: visibleContainer
                  Package.name: "visible"

                  width: 64
                  height: 64
                  enabled: packageRoot.DelegateModel.inSelected

                  drag.target: draggable

                  Item {
                      id: draggable

                      width: 64
                      height: 64

                      Drag.active: visibleContainer.drag.active

                      anchors { horizontalCenter: parent.horizontalCenter; verticalCenter: parent.verticalCenter }

                      states: State {
                          when: visibleContainer.drag.active
                          AnchorChanges { target:  draggable; anchors { horizontalCenter: undefined; verticalCenter: undefined} }
                          ParentChange { target: selectionView; parent: draggable; x: 0; y: 0 }
                          PropertyChanges { target: root; dragging: true }
                          ParentChange { target: draggable; parent: root }
                      }
                  }
                  DropArea {
                      anchors.fill: parent
                      onEntered: selectedItems.move(0, visualModel.items.get(packageRoot.DelegateModel.itemsIndex), selectedItems.count)
                  }
              }
              Item {
                  id: selectionContainer
                  Package.name: "selection"

                  width: 64
                  height: 64

                  visible: PathView.onPath
              }
              Rectangle {
                  id: content
                  parent: visibleContainer

                  width: 58
                  height: 58

                  radius: 8

                  gradient: Gradient {
                      GradientStop { id: gradientStart; position: 0.0; color: "#8AC953" }
                      GradientStop { id: gradientEnd; position: 1.0; color: "#8BC953" }
                  }

                  border.width: 2
                  border.color: "#007423"

                  state: root.dragging && packageRoot.DelegateModel.inSelected ? "selected" : "visible"

                  Text {
                      anchors.fill: parent
                      horizontalAlignment: Text.AlignHCenter
                      verticalAlignment: Text.AlignVCenter
                      color: "white"
                      text: modelData
                      font.pixelSize: 18
                  }

                  Rectangle {
                      anchors { right: parent.right; top: parent.top; margins: 3 }
                      width: 12; height: 12
                      color: packageRoot.DelegateModel.inSelected ? "black" : "white"
                      radius: 6

                      border.color: "white"
                      border.width: 2

                      MouseArea {
                          anchors.fill: parent
                          onClicked: packageRoot.DelegateModel.inSelected = !packageRoot.DelegateModel.inSelected
                      }
                  }

                  states: [
                      State {
                          name: "selected"
                          ParentChange { target: content; parent: selectionContainer; x: 3; y: 3 }
                          PropertyChanges { target: packageRoot; DelegateModel.inItems: visibleContainer.drag.active }
                          PropertyChanges { target: gradientStart; color: "#017423" }
                          PropertyChanges { target: gradientStart; color: "#007423" }
                      }, State {
                          name: "visible"
                          PropertyChanges { target: packageRoot; DelegateModel.inItems: true }
                          ParentChange { target: content; parent: visibleContainer; x: 3; y: 3 }
                          PropertyChanges { target: gradientStart; color: "#8AC953" }
                          PropertyChanges { target: gradientStart; color: "#8BC953" }
                      }
                  ]
                  transitions: Transition {
                      PropertyAction { target: packageRoot; properties: "DelegateModel.inItems" }
                      ParentAnimation {
                          target: content
                          NumberAnimation { target: content; properties: "x,y"; duration: 500 }
                      }
                      ColorAnimation { targets: [gradientStart, gradientEnd]; duration: 500 }
                  }
              }
          }
      }

      DelegateModel {
          id: visualModel
          model: 35
          delegate: packageDelegate

          groups: VisualDataGroup { id: selectedItems; name: "selected" }

          Component.onCompleted:  parts.selection.filterOnGroup = "selected"
      }

      PathView {
          id: selectionView

          height: 64
          width: 64

          model: visualModel.parts.selection

          path: Path {
              startX: 0
              startY: 0
              PathLine { x: 64; y: 64 }
          }
      }

      GridView {
          id: itemsView
          anchors { fill: parent }
          cellWidth: 64
          cellHeight: 64
          model: visualModel.parts.visible
      }
  }