1 | /******************************************************************** |
2 | KWin - the KDE window manager |
3 | This file is part of the KDE project. |
4 | |
5 | Copyright (C) 2013 Martin Gräßlin <mgraesslin@kde.org> |
6 | |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by |
9 | the Free Software Foundation; either version 2 of the License, or |
10 | (at your option) any later version. |
11 | |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | GNU General Public License for more details. |
16 | |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. |
19 | *********************************************************************/ |
20 | #include "screens.h" |
21 | #include "client.h" |
22 | #include "cursor.h" |
23 | #include "settings.h" |
24 | #include "workspace.h" |
25 | |
26 | #include <QApplication> |
27 | #include <QDesktopWidget> |
28 | #include <QTimer> |
29 | |
30 | namespace KWin |
31 | { |
32 | |
33 | KWIN_SINGLETON_FACTORY_FACTORED(Screens, DesktopWidgetScreens) |
34 | |
35 | Screens::Screens(QObject *parent) |
36 | : QObject(parent) |
37 | , m_count(0) |
38 | , m_current(0) |
39 | , m_currentFollowsMouse(false) |
40 | , m_changedTimer(new QTimer(this)) |
41 | { |
42 | m_changedTimer->setSingleShot(true); |
43 | m_changedTimer->setInterval(100); |
44 | connect(m_changedTimer, SIGNAL(timeout()), SLOT(updateCount())); |
45 | connect(m_changedTimer, SIGNAL(timeout()), SIGNAL(changed())); |
46 | |
47 | Settings settings; |
48 | settings.setDefaults(); |
49 | m_currentFollowsMouse = settings.activeMouseScreen(); |
50 | } |
51 | |
52 | Screens::~Screens() |
53 | { |
54 | s_self = NULL; |
55 | } |
56 | |
57 | void Screens::reconfigure() |
58 | { |
59 | if (!m_config) { |
60 | return; |
61 | } |
62 | Settings settings(m_config); |
63 | settings.readConfig(); |
64 | setCurrentFollowsMouse(settings.activeMouseScreen()); |
65 | } |
66 | |
67 | void Screens::setCount(int count) |
68 | { |
69 | if (m_count == count) { |
70 | return; |
71 | } |
72 | const int previous = m_count; |
73 | m_count = count; |
74 | emit countChanged(previous, count); |
75 | } |
76 | |
77 | void Screens::setCurrent(int current) |
78 | { |
79 | if (m_current == current) { |
80 | return; |
81 | } |
82 | m_current = current; |
83 | } |
84 | |
85 | void Screens::setCurrent(const QPoint &pos) |
86 | { |
87 | setCurrent(number(pos)); |
88 | } |
89 | |
90 | void Screens::setCurrent(const Client *c) |
91 | { |
92 | if (!c->isActive()) { |
93 | return; |
94 | } |
95 | if (!c->isOnScreen(m_current)) { |
96 | setCurrent(c->screen()); |
97 | } |
98 | } |
99 | |
100 | void Screens::setCurrentFollowsMouse(bool follows) |
101 | { |
102 | if (m_currentFollowsMouse == follows) { |
103 | return; |
104 | } |
105 | m_currentFollowsMouse = follows; |
106 | } |
107 | |
108 | int Screens::current() const |
109 | { |
110 | if (m_currentFollowsMouse) { |
111 | return number(Cursor::pos()); |
112 | } |
113 | Client *client = Workspace::self()->activeClient(); |
114 | if (client && !client->isOnScreen(m_current)) { |
115 | return client->screen(); |
116 | } |
117 | return m_current; |
118 | } |
119 | |
120 | int Screens::intersecting(const QRect &r) const |
121 | { |
122 | int cnt = 0; |
123 | for (int i = 0; i < count(); ++i) { |
124 | if (geometry(i).intersects(r)) { |
125 | ++cnt; |
126 | } |
127 | } |
128 | return cnt; |
129 | } |
130 | |
131 | DesktopWidgetScreens::DesktopWidgetScreens(QObject *parent) |
132 | : Screens(parent) |
133 | , m_desktop(QApplication::desktop()) |
134 | { |
135 | connect(m_desktop, SIGNAL(screenCountChanged(int)), SLOT(startChangedTimer())); |
136 | connect(m_desktop, SIGNAL(resized(int)), SLOT(startChangedTimer())); |
137 | updateCount(); |
138 | } |
139 | |
140 | DesktopWidgetScreens::~DesktopWidgetScreens() |
141 | { |
142 | } |
143 | |
144 | QRect DesktopWidgetScreens::geometry(int screen) const |
145 | { |
146 | if (Screens::self()->isChanging()) |
147 | const_cast<DesktopWidgetScreens*>(this)->updateCount(); |
148 | return m_desktop->screenGeometry(screen); |
149 | } |
150 | |
151 | int DesktopWidgetScreens::number(const QPoint &pos) const |
152 | { |
153 | if (Screens::self()->isChanging()) |
154 | const_cast<DesktopWidgetScreens*>(this)->updateCount(); |
155 | return m_desktop->screenNumber(pos); |
156 | } |
157 | |
158 | void DesktopWidgetScreens::updateCount() |
159 | { |
160 | setCount(m_desktop->screenCount()); |
161 | } |
162 | |
163 | } // namespace |
164 | |