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/*
* Copyright (C) 2016 Michael Bohlender, <michael.bohlender@kdemail.net>
* Copyright (C) 2017 Christian Mollekopf, <mollekopf@kolabsystems.com>
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
import QtQuick 2.7
import QtQuick.Controls 2
import org.kube.framework 1.0 as Kube
/*
* The MouseArea + interactive: false + maximumFlickVelocity are required
* to fix scrolling for desktop systems where we don't want flicking behaviour.
*
* See also:
* ScrollView.qml in qtquickcontrols
* qquickwheelarea.cpp in qtquickcontrols
*/
MouseArea {
id: root
propagateComposedEvents: true
property Flickable flickable
//Place the mouse area under the flickable
z: -1
onFlickableChanged: {
flickable.interactive = false
flickable.maximumFlickVelocity = 100000
flickable.boundsBehavior = Flickable.StopAtBounds
root.parent = flickable
}
function calculateNewPosition(flickableItem, wheel) {
//Nothing to scroll
if (flickableItem.contentHeight < flickableItem.height) {
return flickableItem.contentY;
}
//Ignore 0 events (happens at least with Christians trackpad)
if (wheel.pixelDelta.y == 0 && wheel.angleDelta.y == 0) {
return flickableItem.contentY;
}
//pixelDelta seems to be the same as angleDelta/8
var pixelDelta = wheel.pixelDelta.y != 0 ? wheel.pixelDelta.y : wheel.angleDelta.y / 8
var y = pixelDelta
if (!y) {
return flickableItem.contentY;
}
var minYExtent = flickableItem.originY + flickableItem.topMargin;
var maxYExtent = (flickableItem.contentHeight + flickableItem.bottomMargin + flickableItem.originY) - flickableItem.height;
if (typeof(flickableItem.headerItem) !== "undefined" && flickableItem.headerItem) {
minYExtent += flickableItem.headerItem.height
}
//Avoid overscrolling
return Math.max(minYExtent, Math.min(maxYExtent, flickableItem.contentY - y));
}
onWheel: {
var newPos = calculateNewPosition(flickable, wheel);
// console.warn("Delta: ", wheel.pixelDelta.y);
// console.warn("Old position: ", flickable.contentY);
// console.warn("New position: ", newPos);
// Show the scrollbars
flickable.flick(0, 0);
flickable.contentY = newPos;
cancelFlickStateTimer.start()
}
Timer {
id: cancelFlickStateTimer
//How long the scrollbar will remain visible
interval: 500
// Hide the scrollbars
onTriggered: listView.cancelFlick();
}
}
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