/usr/share/unity8/Components/ScrollCalculator.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 77 78 79 80 81 | /*
* Copyright (C) 2014 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 Ubuntu.Components 1.3
Item {
id: scrollArea
readonly property bool areaActive: lateralPosition >= 0
property real stopScrollThreshold: units.gu(2)
property int direction: Qt.LeftToRight
property real baseScrollAmount: units.dp(3)
property real maximumScrollAmount: units.dp(8)
property real lateralPosition: -1
property real forceScrollingPercentage: 0.4
signal scroll(real scrollAmount)
width: units.gu(5)
rotation: direction === Qt.LeftToRight ? 0 : 180
onAreaActiveChanged: areaActive ? handleEnter() : handleExit()
function handleEnter() {
d.thresholdAreaX = -scrollArea.stopScrollThreshold;
scrollTimer.restart();
}
function handleExit() {
d.thresholdAreaX = -scrollArea.stopScrollThreshold;
scrollTimer.stop();
}
onLateralPositionChanged: {
if (scrollArea.areaActive) {
if (lateralPosition > width * (1 - forceScrollingPercentage)) {
d.thresholdAreaX = width * (1 - forceScrollingPercentage);
if (!scrollTimer.running) scrollTimer.restart();
} else if (lateralPosition > d.thresholdAreaX + scrollArea.stopScrollThreshold) {
d.thresholdAreaX = lateralPosition - scrollArea.stopScrollThreshold;
if (!scrollTimer.running) scrollTimer.restart();
} else if (lateralPosition < d.thresholdAreaX) {
d.thresholdAreaX = lateralPosition;
scrollTimer.stop();
}
d.progression = lateralPosition / width;
}
}
Timer {
id: scrollTimer
interval: 16
repeat: true
onTriggered: {
var scrollAmount = scrollArea.baseScrollAmount + scrollArea.maximumScrollAmount * d.progression;
scrollArea.scroll(scrollAmount);
}
}
QtObject {
id: d
property real progression: 0
property real thresholdAreaX: -scrollArea.stopScrollThreshold
}
}
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