ControlView.qml Example File | Qt Quick Extras 5.5

- Qt 5.5
- Qt Quick Extras
- Qt Quick Extras - Gallery
- ControlView.qml Example File
- Qt 5.5.1 Reference Documentation

# ControlView.qml Example File

gallery/qml/ControlView.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:
    **
    ** "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
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    **     the documentation and/or other materials provided with the
    **     distribution.
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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 2.2
    import QtQuick.Controls 1.1

    Rectangle {
        id: view
        color: darkBackground ? "transparent" : lightBackgroundColor

        Keys.onReleased: {
            if (event.key === Qt.Key_Back) {
                stackView.pop();
                event.accepted = true;
            }
        }

        property bool darkBackground: true

        property Component control
        property Component customizer

        property alias controlItem: controlLoader.item
        property alias customizerItem: customizerLoader.item

        property bool isCustomizerVisible: false

        property real margin: root.toPixels(0.05)

        property rect controlBounds: Qt.rect(largestControlItem.x + controlBoundsItem.x,
            largestControlItem.y + controlBoundsItem.y, controlBoundsItem.width, controlBoundsItem.height)

        Item {
            id: largestControlItem
            x: margin
            y: margin
            width: isCustomizerVisible ? widthWhenCustomizing : widthWhenNotCustomizing
            height: isCustomizerVisible ? heightWhenCustomizing : heightWhenNotCustomizing

            readonly property real widthWhenCustomizing: (!isScreenPortrait ? parent.width / 2 : parent.width) - margin * 2
            readonly property real heightWhenCustomizing: (isScreenPortrait ? parent.height / 2 : parent.height - toolbar.height) - margin * 2
            readonly property real widthWhenNotCustomizing: parent.width - margin * 2
            readonly property real heightWhenNotCustomizing: parent.height - toolbar.height - margin * 2

            Item {
                id: controlBoundsItem
                x: parent.width / 2 - controlBoundsItem.width / 2
                y: customizer && customizerItem.visible ? 0 : (isScreenPortrait ? (parent.height / 2) - (controlBoundsItem.height / 2) : 0)
                width: Math.min(parent.widthWhenCustomizing, parent.widthWhenNotCustomizing)
                height: Math.min(parent.heightWhenCustomizing, parent.heightWhenNotCustomizing)

                Behavior on x {
                    id: controlXBehavior
                    enabled: false
                    NumberAnimation {}
                }

                Behavior on y {
                    id: controlYBehavior
                    enabled: false
                    NumberAnimation {}
                }

                Loader {
                    id: controlLoader
                    sourceComponent: control
                    anchors.centerIn: parent

                    property alias view: view
                }
            }
        }

        Flickable {
            id: flickable
            // Hide the customizer on the right of the screen if it's not visible.
            x: (isScreenPortrait ? 0 : (isCustomizerVisible ? largestControlItem.x + largestControlItem.width + margin : view.width)) + margin
            y: (isScreenPortrait ? largestControlItem.y + largestControlItem.height : 0) + margin
            width: largestControlItem.width
            height: parent.height - y - toolbar.height - margin
            anchors.leftMargin: margin
            anchors.rightMargin: margin
            visible: customizerLoader.opacity > 0

            flickableDirection: Flickable.VerticalFlick

            clip: true
            contentWidth: width
            contentHeight: customizerLoader.height

            Behavior on x {
                id: flickableXBehavior
                enabled: false
                NumberAnimation {}
            }

            Behavior on y {
                id: flickableYBehavior
                enabled: false
                NumberAnimation {}
            }

            Loader {
                id: customizerLoader
                sourceComponent: customizer
                opacity: 0
                width: flickable.width

                property alias view: view

                Behavior on opacity {
                    NumberAnimation {
                        duration: 300
                    }
                }
            }
        }

        ControlViewToolbar {
            id: toolbar

            onCustomizeClicked: {
                controlXBehavior.enabled = !isScreenPortrait;
                controlYBehavior.enabled = isScreenPortrait;

                isCustomizerVisible = !isCustomizerVisible;

                if (isScreenPortrait) {
                    flickableXBehavior.enabled = false;
                    flickableYBehavior.enabled = true;
                } else {
                    flickableXBehavior.enabled = true;
                    flickableYBehavior.enabled = false;
                }

                customizerLoader.opacity = isCustomizerVisible ? 1 : 0;
            }
        }

        FlickableMoreIndicator {
            flickable: flickable
            atTop: true
            gradientColor: view.darkBackground ? darkBackgroundColor : lightBackgroundColor
        }

        FlickableMoreIndicator {
            flickable: flickable
            atTop: false
            gradientColor: view.darkBackground ? darkBackgroundColor : lightBackgroundColor
        }
    }