/usr/share/unity8/Components/ScreenGrabber.qml is in unity8-common 8.12+16.04.20160401-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 | /*
 * Copyright (C) 2014-2015 Canonical, Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
import QtQuick 2.4
import ScreenGrabber 0.1
import GlobalShortcut 1.0
Rectangle {
    id: root
    visible: false
    color: "white"
    anchors.fill: parent
    opacity: 0.0
    // to be set from outside
    property int rotationAngle: 0
    ScreenGrabber {
        id: screenGrabber
        objectName: "screenGrabber"
    }
    GlobalShortcut {
        id: screenshotShortcut
        shortcut: Qt.Key_Print
        onTriggered: capture()
    }
    NotificationAudio {
        id: shutterSound
        source: "/system/media/audio/ui/camera_click.ogg"
    }
    function capture() {
        visible = true;
        shutterSound.stop();
        shutterSound.play();
        fadeIn.start();
    }
    NumberAnimation on opacity {
        id: fadeIn
        from: 0.0
        to: 1.0
        onStopped: {
            if (visible) {
                fadeOut.start();
            }
        }
    }
    NumberAnimation on opacity {
        id: fadeOut
        from: 1.0
        to: 0.0
        onStopped: {
            if (visible) {
                screenGrabber.captureAndSave(root.rotationAngle);
                visible = false;
            }
        }
    }
}
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