Unity 8
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MainViewStyle.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 import QtQuick 2.0
17 import Ubuntu.Components 1.1
18 
19 // FIXME: copied with slight modifications from Ubuntu UI Toolkit's Ambiance's theme
20 Item {
21  // styling properties
22  anchors.fill: parent
23  z: -1
24  id: mainViewStyle
25 
26  /*!
27  The background texture of the main view. The image will be drawn over the background color,
28  so if it has (semi-)transparent pixels, in those pixels the background color will be visible.
29  */
30  property url backgroundSource: "graphics/background_paper.png"
31  property var theme
32 
33  Gradient {
34  id: backgroundGradient
35  GradientStop { position: 0.0; color: styledItem.headerColor }
36  GradientStop { position: 0.83; color: styledItem.backgroundColor }
37  GradientStop { position: 1.0; color: styledItem.footerColor }
38  }
39 
40  Rectangle {
41  id: backgroundColor
42  anchors.fill: parent
43  color: styledItem.backgroundColor
44  gradient: internals.isGradient ? backgroundGradient : null
45  }
46 
47  Image {
48  id: backgroundTexture
49  anchors.fill: parent
50  source: mainViewStyle.theme.name === "Ambiance" ? mainViewStyle.backgroundSource : ""
51  fillMode: Image.Tile
52  asynchronous: true
53  cache: false
54  visible: status === Image.Ready
55  }
56 
57  QtObject {
58  id: internals
59  property bool isGradient: styledItem.backgroundColor != styledItem.headerColor ||
60  styledItem.backgroundColor != styledItem.footerColor
61  /*
62  As we don't know the order the property bindings and onXXXChanged signals are evaluated
63  we should rely only on one property when changing the theme to avoid intermediate
64  theme changes due to properties being evaluated separately.
65 
66  Qt bug: https://bugreports.qt-project.org/browse/QTBUG-11712
67  */
68  property string theme: (ColorUtils.luminance(styledItem.backgroundColor) >= 0.85) ? "Ambiance" :
69  (isGradient ? "SuruGradient" : "SuruDark")
70  }
71 
72  // automatically select the appropriate theme depending on the background colors
73  Binding {
74  target: theme
75  property: "name"
76  value: internals.theme
77  when: internals.theme !== ""
78  }
79 }