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** Copyright (C) 2018 Pelagicore AG
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** This file is part of the Neptune 3 UI.
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import QtQuick 2.7

import shared.animations 1.0
import system.controls 1.0
import shared.Style 1.0
import shared.Sizes 1.0

/*
    Displays the main window of a given application using in and out transition animations

    When the given application gains its main window, ApplicationFrame will make it appear with a
    transition animation. Likewise when the application loses it.
 */
Item {
    id: root
    property var appInfo
    property real exposedRectTopMargin
    property real exposedRectBottomMargin

    visible: children.length > 0

    QtObject {
        id: d

        property var prevWindow
        property var currentMaxWindowItem: null
        property var window: root.appInfo ? root.appInfo.window : null
        onWindowChanged: {
            // only apply the in and out animations when incoming window is different
            // than the previous one.
            if (d.window !== d.prevWindow) {
                d.prevWindow = d.window;
                if (d.currentMaxWindowItem) {
                    d.currentMaxWindowItem.removeAnimation.start();
                    d.currentMaxWindowItem = null;
                }

                if (d.window) {
                    d.currentMaxWindowItem = maximizedWindowComponent.createObject(
                                d, {"parent":root, "appInfo": root.appInfo});
                    d.window.parent = root;
                    d.currentMaxWindowItem.addAnimation.start();
                }
            }
        }
    }

    // TODO: Implement better in and out animations. The current ones are just placeholders

    Component {
        id: maximizedWindowComponent
        ApplicationCCWindowItem {
            id: maxWindowObj
            anchors.fill: parent

            currentHeight: root.height
            currentWidth: root.width
            exposedRectTopMargin: root.exposedRectTopMargin
            exposedRectBottomMargin: root.exposedRectBottomMargin

            windowState: "Maximized"

            property var addAnimation: SequentialAnimation {
                ScriptAction { script: { maxWindowObj.windowState = "Maximized"; }}
                DefaultNumberAnimation { target: maxWindowObj; property: "opacity"; from: 0; to: 1 }
            }
            property var removeAnimation: SequentialAnimation {
                ScriptAction { script: { maxWindowObj.windowState = "Minimized"; }}
                DefaultNumberAnimation { target: maxWindowObj; property: "opacity"; from: 1; to: 0 }
                ScriptAction { script: { maxWindowObj.destroy(); }}
            }
        }
    }
}