- Qt 5.5
- Qt Quick
- Qt Quick Examples - Views
- dragselection.qml Example File
- Qt 5.5.1 Reference Documentation

# dragselection.qml Example File

views/visualdatamodel/dragselection.qml

    /****************************************************************************
    **
    ** 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:
    **
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    **     contributors may be used to endorse or promote products derived
    **     from this software without specific prior written permission.
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    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
        }
    }