Unity 8
EdgeBarrierController.qml
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  */
16 
17 import QtQuick 2.4
18 import Utils 0.1 // For EdgeBarrierSettings
19 
20 MouseArea {
21  id: root
22 
23  hoverEnabled: true
24 
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)
28 
29  // Emitted when progress reaches 1.0
30  // Should trigger the action associated with this edge
31  signal passed()
32 
33  function push(amount) {
34  if (!root._containsMouse) {
35  return;
36  }
37 
38  if (_accumulatedPush === EdgeBarrierSettings.pushThreshold) {
39  // NO-OP
40  return;
41  }
42 
43  if (_accumulatedPush + amount > EdgeBarrierSettings.pushThreshold) {
44  _accumulatedPush = EdgeBarrierSettings.pushThreshold;
45  } else {
46  _accumulatedPush += amount;
47  }
48 
49  if (_accumulatedPush === EdgeBarrierSettings.pushThreshold) {
50  passed();
51  }
52  }
53 
54  onEnabledChanged: {
55  if (!enabled) {
56  // reset
57  _accumulatedPush = 0;
58  }
59  }
60 
61  // to be overwritten by tests
62  property bool _containsMouse: root.containsMouse
63  on_ContainsMouseChanged: {
64  if (!_containsMouse) {
65  // reset
66  _accumulatedPush = 0;
67  }
68  }
69 
70  property real _accumulatedPush: 0
71 }