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unity8/qml/Stages/Animations/BaseSessionAnimation.qml
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1/*
2 * Copyright (C) 2014 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 2.0
19/* This is the base case for surface animations, used when adding/removing * child surfaces.
20 * The class is meant to be overridden and changes/animations provided for state changes.
21 * NB. It is important to release the surface at the end of the "out" animation.
22 *
23 * Example - Simple fade in/out
24 *
25 * BaseSurfaceAnimation {
26 * outChanges: [ PropertyChanges { target: animation.surface; opacity: 0.0 } ]
27 * outAnimations: [
28 SequentialAnimation {
29 * NumberAnimation { target: animation.surface; property: "opacity"; duration: 300 }
30 * ScriptAction { script: { if (animation.parent.removing) animation.surface.release(); } }
31 * }
32 * ]
33 *
34 * inChanges: [ PropertyChanges { target: animation.surface; opacity: 1.0 } ]
35 * inAnimations: [ NumberAnimation { target: animation.surface; property: "opacity"; duration: 300 } ]
36 * }
37 */
38Item {
39 id: base
40 property var container
41 objectName: "sessionAnimation"
43 // changes applied when state changes to "from"
44 property list<QtObject> fromChanges
45 // transition animations when changing state to "from"
46 property list<QtObject> fromAnimations
48 // changes applied when state changes to "to"
49 property list<QtObject> toChanges
50 // transition animations when changing state to "to"
51 property list<QtObject> toAnimations
53 function start() {
54 // "prep" state forces toChanges without transition animations.
55 state = "prep"
56 state = "to";
57 }
58 function end() {
59 state = "from";
60 }
62 signal completed()
64 states: [
65 State {
66 name: "baseAnimation"
67 PropertyChanges { target: container; anchors.fill: undefined }
68 },
70 State {
71 name: "prep"
72 extend: "baseAnimation"
73 changes: fromChanges
74 },
75 State {
76 name: "from"
77 extend: "prep"
78 },
79 State {
80 name: "in"
81 extend: "baseAnimation"
82 changes: toChanges
83 }
84 ]
86 transitions: [
87 Transition {
88 to: "from"
89 animations: fromAnimations
90 },
91 Transition {
92 to: "to"
93 animations: toAnimations
94 }
95 ]