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  Binding { target: surface; property: "antialiasing"; value: !root.interactive; when: surface }
43 
44  TouchGate {
45  targetItem: surface
46  anchors.fill: root
47  enabled: root.surface ? root.surface.enabled : false
48  z: 2
49  }
50 
51  Connections {
52  target: root.surface
53  // FIXME: I would rather not need to do this, but currently it doesn't get
54  // active focus without it and I don't know why.
55  // Possibly because if an item get focus=true before it has a parent, once
56  // it gets a parent QQuickWindow won't check its focus and update its activeFocus
57  // accordingly. Unlike when you focus=true after the item already has a parent.
58  onFocusChanged: d.forceSurfaceActiveFocusIfReady();
59  onParentChanged: d.forceSurfaceActiveFocusIfReady();
60  onEnabledChanged: d.forceSurfaceActiveFocusIfReady();
61  }
62 
63  QtObject {
64  id: d
65  function forceSurfaceActiveFocusIfReady() {
66  if (root.surface !== null &&
67  root.surface.focus &&
68  root.surface.parent === root &&
69  root.surface.enabled) {
70  root.surface.forceActiveFocus();
71  }
72  }
73  }
74 
75  states: [
76  State {
77  name: "zombie"
78  when: surface && !surface.live
79  }
80  ]
81  transitions: [
82  Transition {
83  from: ""; to: "zombie"
84  SequentialAnimation {
85  UbuntuNumberAnimation { target: surface; property: "opacity"; to: 0.0
86  duration: UbuntuAnimation.BriskDuration }
87  PropertyAction { target: surface; property: "visible"; value: false }
88  ScriptAction { script: { if (root.surface) { root.surface.release(); } } }
89  }
90  }
91  ]
92 }