FileBrowser.qml Example File | Qt Multimedia 5.4

- Qt 5.4
- Qt Multimedia
- QML Video Shader Effects Example
- FileBrowser.qml Example File
- Qt 5.4.2 Reference Documentation

# FileBrowser.qml Example File

video/qmlvideofx/qml/qmlvideofx/FileBrowser.qml

    /****************************************************************************
    **
    ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
    ** Contact: http://www.qt-project.org/legal
    **
    ** This file is part of the Qt Mobility Components.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
    ** 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 Digia. For licensing terms and
    ** conditions see http://qt.digia.com/licensing. For further information
    ** use the contact form at http://qt.digia.com/contact-us.
    **
    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
    ** General Public License version 2.1 or version 3 as published by the Free
    ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
    ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
    ** following information to ensure the GNU Lesser General Public License
    ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
    ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
    **
    ** In addition, as a special exception, Digia gives you certain additional
    ** rights. These rights are described in the Digia Qt LGPL Exception
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    ** $QT_END_LICENSE$
    **
    ****************************************************************************/

    import QtQuick 2.1
    import Qt.labs.folderlistmodel 2.1

    Rectangle {
        id: fileBrowser
        color: "transparent"
        z: 4

        property string folder
        property bool shown: loader.sourceComponent

        signal fileSelected(string file)

        function selectFile(file) {
            if (file !== "") {
                folder = loader.item.folders.folder
                fileBrowser.fileSelected(file)
            }
            loader.sourceComponent = undefined
        }

        Loader {
            id: loader
        }

        function show() {
            loader.sourceComponent = fileBrowserComponent
            loader.item.parent = fileBrowser
            loader.item.anchors.fill = fileBrowser
            loader.item.folder = fileBrowser.folder
        }

        Component {
            id: fileBrowserComponent

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

                FolderListModel {
                    id: folders1
                    folder: folder
                }

                FolderListModel {
                    id: folders2
                    folder: folder
                }

                SystemPalette {
                    id: palette
                }

                Component {
                    id: folderDelegate

                    Rectangle {
                        id: wrapper
                        function launch() {
                            var path = "file://";
                            if (filePath.length > 2 && filePath[1] === ':') // Windows drive logic, see QUrl::fromLocalFile()
                                path += '/';
                            path += filePath;
                            if (folders.isFolder(index))
                                down(path);
                            else
                                fileBrowser.selectFile(path)
                        }
                        width: root.width
                        height: itemHeight
                        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: itemHeight; height: itemHeight
                            Image {
                                source: "qrc:/images/icon_Folder.png"
                                fillMode: Image.PreserveAspectFit
                                anchors.fill: parent
                                anchors.margins: scaledMargin
                                visible: folders.isFolder(index)
                            }
                        }

                        Text {
                            id: nameText
                            anchors.fill: parent; verticalAlignment: Text.AlignVCenter
                            text: fileName
                            anchors.leftMargin: itemHeight + scaledMargin
                            font.pixelSize: fontSize
                            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 }
                            }
                        ]
                    }
                }

                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
                    }
                    highlightMoveVelocity: 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
                    }
                    highlightMoveVelocity: 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)
                }

                Button {
                    id: cancelButton
                    width: itemWidth
                    height: itemHeight
                    color: "#353535"
                    anchors { bottom: parent.bottom; right: parent.right; margins: 5 * scaledMargin }
                    text: "Cancel"
                    horizontalAlign: Text.AlignHCenter
                    onClicked: fileBrowser.selectFile("")
                }

                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();
                    }
                }

                // titlebar
                Rectangle {
                    color: "black"
                    width: parent.width;
                    height: itemHeight
                    id: titleBar

                    Rectangle {
                        id: upButton
                        width: titleBar.height
                        height: titleBar.height
                        color: "transparent"
                        anchors.left: parent.left
                        anchors.verticalCenter: parent.verticalCenter
                        anchors.margins: scaledMargin

                        Image { anchors.fill: parent; anchors.margins: scaledMargin; source: "qrc:/images/icon_BackArrow.png" }
                        MouseArea { id: upRegion; anchors.fill: parent; onClicked: up() }
                        states: [
                            State {
                                name: "pressed"
                                when: upRegion.pressed
                                PropertyChanges { target: upButton; color: palette.highlight }
                            }
                        ]
                    }

                    Text {
                        anchors.left: upButton.right; anchors.right: parent.right; height: parent.height
                        anchors.leftMargin: 10; anchors.rightMargin: 4
                        text: folders.folder
                        color: "white"
                        elide: Text.ElideLeft; horizontalAlignment: Text.AlignLeft; verticalAlignment: Text.AlignVCenter
                        font.pixelSize: fontSize
                    }
                }

                Rectangle {
                    color: "#353535"
                    width: parent.width
                    height: 1
                    anchors.top: titleBar.bottom
                }

                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 (path.toString().length === 0 || path.toString() === 'file:')
                        return;
                    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;
                    }
                }
            }
        }
    }