Unity 8
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SurfaceContainer.qml
1 /*
2  * Copyright 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 Lesser 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 Lesser General Public License for more details.
12  *
13  * You should have received a copy of the GNU Lesser General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16 
17 import QtQuick 2.0
18 import Ubuntu.Components 1.1
19 import Ubuntu.Gestures 0.1 // For TouchGate
20 
21 Item {
22  id: root
23  objectName: "surfaceContainer"
24  property Item surface: null
25  property bool hadSurface: false
26  property int orientation
27  property bool interactive
28 
29  onSurfaceChanged: {
30  if (surface) {
31  surface.parent = root;
32  d.forceSurfaceActiveFocusIfReady();
33  } else {
34  hadSurface = true;
35  }
36  }
37  Binding { target: surface; property: "anchors.fill"; value: root }
38  Binding { target: surface; property: "orientation"; value: root.orientation }
39  Binding { target: surface; property: "z"; value: 1 }
40  Binding { target: surface; property: "enabled"; value: root.interactive; when: surface }
41  Binding { target: surface; property: "focus"; value: root.interactive; when: surface }
42 
43  TouchGate {
44  targetItem: surface
45  anchors.fill: root
46  enabled: root.surface ? root.surface.enabled : false
47  z: 2
48  }
49 
50  Connections {
51  target: root.surface
52  // FIXME: I would rather not need to do this, but currently it doesn't get
53  // active focus without it and I don't know why.
54  // Possibly because if an item get focus=true before it has a parent, once
55  // it gets a parent QQuickWindow won't check its focus and update its activeFocus
56  // accordingly. Unlike when you focus=true after the item already has a parent.
57  onFocusChanged: d.forceSurfaceActiveFocusIfReady();
58  onParentChanged: d.forceSurfaceActiveFocusIfReady();
59  onEnabledChanged: d.forceSurfaceActiveFocusIfReady();
60  }
61 
62  QtObject {
63  id: d
64  function forceSurfaceActiveFocusIfReady() {
65  if (root.surface !== null &&
66  root.surface.focus &&
67  root.surface.parent === root &&
68  root.surface.enabled) {
69  root.surface.forceActiveFocus();
70  }
71  }
72  }
73 
74  states: [
75  State {
76  name: "zombie"
77  when: surface && !surface.live
78  }
79  ]
80  transitions: [
81  Transition {
82  from: ""; to: "zombie"
83  SequentialAnimation {
84  UbuntuNumberAnimation { target: surface; property: "opacity"; to: 0.0
85  duration: UbuntuAnimation.BriskDuration }
86  PropertyAction { target: surface; property: "visible"; value: false }
87  ScriptAction { script: { if (root.surface) { root.surface.release(); } } }
88  }
89  }
90  ]
91 }