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unity8/qml/Components/EdgeBarrierController.qml
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1/*
2 * Copyright (C) 2015 Canonical, Ltd.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; version 3.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
17import QtQuick 2.4
18import Utils 0.1 // For EdgeBarrierSettings
20MouseArea {
21 id: root
23 hoverEnabled: true
25 // Edge push progress
26 // Value range is [0.0, 1.0]
27 readonly property real progress: Math.min(Math.max(0.0, _accumulatedPush / EdgeBarrierSettings.pushThreshold), 1.0)
29 // Emitted when progress reaches 1.0
30 // Should trigger the action associated with this edge
31 signal passed()
33 onPressed: mouse.accepted = false;
35 function push(amount) {
36 if (!root._containsMouse) {
37 return;
38 }
40 if (_accumulatedPush === EdgeBarrierSettings.pushThreshold) {
41 // NO-OP
42 return;
43 }
45 if (_accumulatedPush + amount > EdgeBarrierSettings.pushThreshold) {
46 _accumulatedPush = EdgeBarrierSettings.pushThreshold;
47 } else {
48 _accumulatedPush += amount;
49 }
51 if (_accumulatedPush === EdgeBarrierSettings.pushThreshold) {
52 passed();
53 }
54 }
56 onEnabledChanged: {
57 if (!enabled) {
58 // reset
59 _accumulatedPush = 0;
60 }
61 }
63 // to be overwritten by tests
64 property bool _containsMouse: root.containsMouse
65 on_ContainsMouseChanged: {
66 if (!_containsMouse) {
67 // reset
68 _accumulatedPush = 0;
69 }
70 }
72 property real _accumulatedPush: 0