qtmultimedia/examples/video/qmlvideofx/qml/qmlvideofx/FileBrowser.qml

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import QtQuick 2.0
import Qt.labs.folderlistmodel 1.0

Rectangle {
    id: root
    color: "white"
    property bool showFocusHighlight: false
    property variant folders: folders1
    property variant view: view1
    property alias folder: folders1.folder
    property color textColor: "black"

    signal openFile(string path)

    FolderListModel {
        id: folders1
        folder: folder
    }

    FolderListModel {
        id: folders2
        folder: folder
    }

    SystemPalette {
        id: palette
    }

    Component {
        id: folderDelegate

        Rectangle {
            id: wrapper
            function launch() {
                if (folders.isFolder(index))
                    down(filePath);
                else
                    root.openFile(filePath);
            }
            width: root.width
            height: 52
            color: "transparent"

            Rectangle {
                id: highlight; visible: false
                anchors.fill: parent
                color: palette.highlight
                gradient: Gradient {
                    GradientStop { id: t1; position: 0.0; color: palette.highlight }
                    GradientStop { id: t2; position: 1.0; color: Qt.lighter(palette.highlight) }
                }
            }

            Item {
                width: 48; height: 48
                Image {
                    source: "qrc:/images/folder.png"
                    anchors.centerIn: parent
                    visible: folders.isFolder(index)
                }
            }

            Text {
                id: nameText
                anchors.fill: parent; verticalAlignment: Text.AlignVCenter
                text: fileName
                anchors.leftMargin: 54
                font.pixelSize: 32
                color: (wrapper.ListView.isCurrentItem && root.showFocusHighlight) ? palette.highlightedText : textColor
                elide: Text.ElideRight
            }

            MouseArea {
                id: mouseRegion
                anchors.fill: parent
                onPressed: {
                    root.showFocusHighlight = false;
                    wrapper.ListView.view.currentIndex = index;
                }
                onClicked: { if (folders == wrapper.ListView.view.model) launch() }
            }

            states: [
                State {
                    name: "pressed"
                    when: mouseRegion.pressed
                    PropertyChanges { target: highlight; visible: true }
                    PropertyChanges { target: nameText; color: palette.highlightedText }
                }
            ]
        }
    }

    Rectangle {
        id: cancelButton
        width: 100
        height: titleBar.height - 7
        color: "black"
        anchors { bottom: parent.bottom; horizontalCenter: parent.horizontalCenter }

        Text {
            anchors { fill: parent; margins: 4 }
            text: "Cancel"
            color: "white"
            horizontalAlignment: Text.AlignHCenter
            verticalAlignment: Text.AlignVCenter
            font.pixelSize: 20
        }

        MouseArea {
            anchors.fill: parent
            onClicked: root.openFile("")
        }
    }

    ListView {
        id: view1
        anchors.top: titleBar.bottom
        anchors.bottom: cancelButton.top
        x: 0
        width: parent.width
        model: folders1
        delegate: folderDelegate
        highlight: Rectangle {
            color: palette.highlight
            visible: root.showFocusHighlight && view1.count != 0
            gradient: Gradient {
                GradientStop { id: t1; position: 0.0; color: palette.highlight }
                GradientStop { id: t2; position: 1.0; color: Qt.lighter(palette.highlight) }
            }
            width: view1.currentItem == null ? 0 : view1.currentItem.width
        }
        highlightMoveSpeed: 1000
        pressDelay: 100
        focus: true
        state: "current"
        states: [
            State {
                name: "current"
                PropertyChanges { target: view1; x: 0 }
            },
            State {
                name: "exitLeft"
                PropertyChanges { target: view1; x: -root.width }
            },
            State {
                name: "exitRight"
                PropertyChanges { target: view1; x: root.width }
            }
        ]
        transitions: [
            Transition {
                to: "current"
                SequentialAnimation {
                    NumberAnimation { properties: "x"; duration: 250 }
                }
            },
            Transition {
                NumberAnimation { properties: "x"; duration: 250 }
                NumberAnimation { properties: "x"; duration: 250 }
            }
        ]
        Keys.onPressed: root.keyPressed(event.key)
    }

    ListView {
        id: view2
        anchors.top: titleBar.bottom
        anchors.bottom: parent.bottom
        x: parent.width
        width: parent.width
        model: folders2
        delegate: folderDelegate
        highlight: Rectangle {
            color: palette.highlight
            visible: root.showFocusHighlight && view2.count != 0
            gradient: Gradient {
                GradientStop { id: t1; position: 0.0; color: palette.highlight }
                GradientStop { id: t2; position: 1.0; color: Qt.lighter(palette.highlight) }
            }
            width: view1.currentItem == null ? 0 : view1.currentItem.width
        }
        highlightMoveSpeed: 1000
        pressDelay: 100
        states: [
            State {
                name: "current"
                PropertyChanges { target: view2; x: 0 }
            },
            State {
                name: "exitLeft"
                PropertyChanges { target: view2; x: -root.width }
            },
            State {
                name: "exitRight"
                PropertyChanges { target: view2; x: root.width }
            }
        ]
        transitions: [
            Transition {
                to: "current"
                SequentialAnimation {
                    NumberAnimation { properties: "x"; duration: 250 }
                }
            },
            Transition {
                NumberAnimation { properties: "x"; duration: 250 }
            }
        ]
        Keys.onPressed: root.keyPressed(event.key)
    }

    Keys.onPressed: {
        root.keyPressed(event.key);
        if (event.key == Qt.Key_Return || event.key == Qt.Key_Select || event.key == Qt.Key_Right) {
            view.currentItem.launch();
            event.accepted = true;
        } else if (event.key == Qt.Key_Left) {
            up();
        }
    }

    BorderImage {
        source: "qrc:/images/titlebar.sci";
        width: parent.width;
        height: 52
        y: -7
        id: titleBar

        Rectangle {
            id: upButton
            width: 48
            height: titleBar.height - 7
            color: "transparent"
            Image { anchors.centerIn: parent; source: "qrc:/images/up.png" }
            MouseArea { id: upRegion; anchors.centerIn: parent
                width: 56
                height: 56
                onClicked: if (folders.parentFolder != "") up()
            }
            states: [
                State {
                    name: "pressed"
                    when: upRegion.pressed
                    PropertyChanges { target: upButton; color: palette.highlight }
                }
            ]
        }

        Rectangle {
            color: "gray"
            x: 48
            width: 1
            height: 44
        }

        Text {
            anchors.left: upButton.right; anchors.right: parent.right; height: parent.height
            anchors.leftMargin: 4; anchors.rightMargin: 4
            text: folders.folder
            color: "white"
            elide: Text.ElideLeft; horizontalAlignment: Text.AlignRight; verticalAlignment: Text.AlignVCenter
            font.pixelSize: 32
        }
    }

    function down(path) {
        if (folders == folders1) {
            view = view2
            folders = folders2;
            view1.state = "exitLeft";
        } else {
            view = view1
            folders = folders1;
            view2.state = "exitLeft";
        }
        view.x = root.width;
        view.state = "current";
        view.focus = true;
        folders.folder = path;
    }

    function up() {
        var path = folders.parentFolder;
        if (folders == folders1) {
            view = view2
            folders = folders2;
            view1.state = "exitRight";
        } else {
            view = view1
            folders = folders1;
            view2.state = "exitRight";
        }
        view.x = -root.width;
        view.state = "current";
        view.focus = true;
        folders.folder = path;
    }

    function keyPressed(key) {
        switch (key) {
            case Qt.Key_Up:
            case Qt.Key_Down:
            case Qt.Key_Left:
            case Qt.Key_Right:
                root.showFocusHighlight = true;
            break;
            default:
                // do nothing
            break;
        }
    }
}