FileBrowser.qml Example File | Qt Multimedia 5.5

- Qt 5.5
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- QML Video Example
- FileBrowser.qml Example File
- Qt 5.5.1 Reference Documentation

# FileBrowser.qml Example File

video/qmlvideo/qml/qmlvideo/FileBrowser.qml

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the Qt Mobility Components.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
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    ** Licensees holding valid commercial Qt licenses may use this file in
    ** accordance with the commercial license agreement provided with the
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    ** 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
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    import QtQuick 2.0
    import Qt.labs.folderlistmodel 2.0

    Rectangle {
        id: fileBrowser
        color: "transparent"

        property string folder

        property int itemHeight: Math.min(parent.width, parent.height) / 15
        property int buttonHeight: Math.min(parent.width, parent.height) / 12

        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: folderImage.height
                        color: "transparent"

                        Rectangle {
                            id: highlight
                            visible: false
                            anchors.fill: parent
                            anchors.leftMargin: 5
                            anchors.rightMargin: 5
                            color: "#212121"
                        }

                        Item {
                            id: folderImage
                            width: itemHeight
                            height: itemHeight
                            Image {
                                id: folderPicture
                                source: "qrc:/folder.png"
                                width: itemHeight * 0.9
                                height: itemHeight * 0.9
                                anchors.left: parent.left
                                anchors.margins: 5
                                visible: folders.isFolder(index)
                            }
                        }

                        Text {
                            id: nameText
                            anchors.fill: parent;
                            verticalAlignment: Text.AlignVCenter
                            text: fileName
                            anchors.leftMargin: itemHeight + 10
                            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
                    width: parent.width
                    model: folders1
                    delegate: folderDelegate
                    highlight: Rectangle {
                        color: "#212121"
                        visible: root.showFocusHighlight && view1.count != 0
                        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: "#212121"
                        visible: root.showFocusHighlight && view2.count != 0
                        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)
                }

                Rectangle {
                    width: parent.width
                    height: buttonHeight + 10
                    anchors.bottom: parent.bottom
                    color: "black"
                }

                Rectangle {
                    id: cancelButton
                    width: parent.width
                    height: buttonHeight
                    color: "#212121"
                    anchors.bottom: parent.bottom
                    anchors.left: parent.left
                    anchors.right: parent.right
                    anchors.margins: 5
                    radius: buttonHeight / 15

                    Text {
                        anchors.fill: parent
                        text: "Cancel"
                        color: "white"
                        horizontalAlignment: Text.AlignHCenter
                        verticalAlignment: Text.AlignVCenter
                    }

                    MouseArea {
                        anchors.fill: parent
                        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();
                    }
                }

                Rectangle {
                    id: titleBar
                    width: parent.width
                    height: buttonHeight + 10
                    anchors.top: parent.top
                    color: "black"

                    Rectangle {
                        width: parent.width;
                        height: buttonHeight
                        color: "#212121"
                        anchors.margins: 5
                        anchors.top: parent.top
                        anchors.left: parent.left
                        anchors.right: parent.right
                        radius: buttonHeight / 15

                        Rectangle {
                            id: upButton
                            width: buttonHeight
                            height: buttonHeight
                            color: "transparent"
                            Image {
                                width: itemHeight
                                height: itemHeight
                                anchors.centerIn: parent
                                source: "qrc:/up.png"
                            }
                            MouseArea { id: upRegion; anchors.centerIn: parent
                                width: buttonHeight
                                height: buttonHeight
                                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: 5; anchors.rightMargin: 5
                            text: folders.folder
                            color: "white"
                            elide: Text.ElideLeft;
                            horizontalAlignment: Text.AlignLeft;
                            verticalAlignment: Text.AlignVCenter
                        }
                    }
                }

                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;
                    }
                }
            }
        }
    }