Lomiri
MousePointer.cpp
1 /*
2  * Copyright (C) 2015-2016 Canonical Ltd.
3  *
4  * This program is free software: you can redistribute it and/or modify it under
5  * the terms of the GNU Lesser General Public License version 3, as published by
6  * the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful, but WITHOUT
9  * ANY WARRANTY; without even the implied warranties of MERCHANTABILITY,
10  * SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11  * 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 #include "MousePointer.h"
18 #include "CursorImageProvider.h"
19 #include "InputDispatcherFilter.h"
20 
21 #include <QQuickWindow>
22 
23 // Lomiri API
24 #include <lomiri/shell/application/MirPlatformCursor.h>
25 
26 MousePointer::MousePointer(QQuickItem *parent)
27  : MirMousePointerInterface(parent)
28  , m_cursorName(QStringLiteral("left_ptr"))
29  , m_themeName(QStringLiteral("default"))
30 {
31  connect(InputDispatcherFilter::instance(), &InputDispatcherFilter::pushedLeftBoundary,
32  this, [this](QScreen* screen, qreal amount, Qt::MouseButtons buttons) {
33  if (window() && window()->screen() == screen) {
34  Q_EMIT pushedLeftBoundary(amount, buttons);
35  }
36  });
37  connect(InputDispatcherFilter::instance(), &InputDispatcherFilter::pushedRightBoundary,
38  this, [this](QScreen* screen, qreal amount, Qt::MouseButtons buttons) {
39  if (window() && window()->screen() == screen) {
40  Q_EMIT pushedRightBoundary(amount, buttons);
41  }
42  });
43  connect(InputDispatcherFilter::instance(), &InputDispatcherFilter::pushedTopBoundary,
44  this, [this](QScreen* screen, qreal amount, Qt::MouseButtons buttons) {
45  if (window() && window()->screen() == screen) {
46  Q_EMIT pushedTopBoundary(amount, buttons);
47  }
48  });
49  connect(InputDispatcherFilter::instance(), &InputDispatcherFilter::pushedTopLeftCorner,
50  this, [this](QScreen* screen, qreal amount, Qt::MouseButtons buttons) {
51  if (window() && window()->screen() == screen) {
52  Q_EMIT pushedTopLeftCorner(amount, buttons);
53  }
54  });
55  connect(InputDispatcherFilter::instance(), &InputDispatcherFilter::pushedTopRightCorner,
56  this, [this](QScreen* screen, qreal amount, Qt::MouseButtons buttons) {
57  if (window() && window()->screen() == screen) {
58  Q_EMIT pushedTopRightCorner(amount, buttons);
59  }
60  });
61  connect(InputDispatcherFilter::instance(), &InputDispatcherFilter::pushedBottomLeftCorner,
62  this, [this](QScreen* screen, qreal amount, Qt::MouseButtons buttons) {
63  if (window() && window()->screen() == screen) {
64  Q_EMIT pushedBottomLeftCorner(amount, buttons);
65  }
66  });
67  connect(InputDispatcherFilter::instance(), &InputDispatcherFilter::pushedBottomRightCorner,
68  this, [this](QScreen* screen, qreal amount, Qt::MouseButtons buttons) {
69  if (window() && window()->screen() == screen) {
70  Q_EMIT pushedBottomRightCorner(amount, buttons);
71  }
72  });
73  connect(InputDispatcherFilter::instance(), &InputDispatcherFilter::pushStopped,
74  this, [this](QScreen* screen) {
75  if (window() && window()->screen() == screen) {
76  Q_EMIT pushStopped();
77  }
78  });
79 
80  InputDispatcherFilter::instance()->registerPointer(this);
81 }
82 
83 MousePointer::~MousePointer()
84 {
85  registerScreen(nullptr);
86  InputDispatcherFilter::instance()->unregisterPointer(this);
87 }
88 
89 void MousePointer::applyItemConfinement(qreal &newX, qreal &newY)
90 {
91  Q_ASSERT(parentItem() != nullptr);
92 
93  if (m_confiningItem.isNull()) {
94  return;
95  }
96 
97  QRectF confiningItemGeometry(0, 0, m_confiningItem->width(), m_confiningItem->height());
98 
99  QRectF confiningRect = m_confiningItem->mapRectToItem(parentItem(), confiningItemGeometry);
100 
101  if (newX < confiningRect.x()) {
102  newX = confiningRect.x();
103  } else if (newX > confiningRect.right()) {
104  newX = confiningRect.right();
105  }
106 
107  if (newY < confiningRect.y()) {
108  newY = confiningRect.y();
109  } else if (newY > confiningRect.bottom()) {
110  newY = confiningRect.bottom();
111  }
112 }
113 
114 int MousePointer::topBoundaryOffset() const
115 {
116  return m_topBoundaryOffset;
117 }
118 
119 void MousePointer::setTopBoundaryOffset(int topBoundaryOffset)
120 {
121  if (m_topBoundaryOffset == topBoundaryOffset)
122  return;
123 
124  m_topBoundaryOffset = topBoundaryOffset;
125  Q_EMIT topBoundaryOffsetChanged(topBoundaryOffset);
126 }
127 
128 void MousePointer::itemChange(ItemChange change, const ItemChangeData &value)
129 {
130  if (change == ItemSceneChange) {
131  registerWindow(value.window);
132  }
133 }
134 
135 void MousePointer::registerWindow(QWindow *window)
136 {
137  if (window == m_registeredWindow) {
138  return;
139  }
140 
141  if (m_registeredWindow) {
142  m_registeredWindow->disconnect(this);
143  }
144 
145  m_registeredWindow = window;
146 
147  if (m_registeredWindow) {
148  connect(window, &QWindow::screenChanged, this, &MousePointer::registerScreen);
149  registerScreen(window->screen());
150  } else {
151  registerScreen(nullptr);
152  }
153 }
154 
155 void MousePointer::registerScreen(QScreen *screen)
156 {
157  if (m_registeredScreen == screen) {
158  return;
159  }
160 
161  if (m_registeredScreen) {
162  auto previousCursor = dynamic_cast<MirPlatformCursor*>(m_registeredScreen->handle()->cursor());
163  if (previousCursor) {
164  previousCursor->unregisterMousePointer(this);
165  } else {
166  qCritical("QPlatformCursor is not a MirPlatformCursor! Cursor module only works in a Mir server.");
167  }
168  }
169 
170  m_registeredScreen = screen;
171 
172  if (m_registeredScreen) {
173  auto cursor = dynamic_cast<MirPlatformCursor*>(m_registeredScreen->handle()->cursor());
174  if (cursor) {
175  cursor->registerMousePointer(this);
176  } else {
177  qCritical("QPlaformCursor is not a MirPlatformCursor! Cursor module only works in Mir.");
178  }
179  }
180 }
181 
182 void MousePointer::setCursorName(const QString &cursorName)
183 {
184  if (cursorName != m_cursorName) {
185  m_cursorName = cursorName;
186  Q_EMIT cursorNameChanged(m_cursorName);
187  }
188 }
189 
190 void MousePointer::setThemeName(const QString &themeName)
191 {
192  if (m_themeName != themeName) {
193  m_themeName = themeName;
194  Q_EMIT themeNameChanged(m_themeName);
195  }
196 }
197 
198 void MousePointer::moveTo(const QPoint &position)
199 {
200  setPosition(position);
201  Q_EMIT mouseMoved();
202 }
203 
204 void MousePointer::setCustomCursor(const QCursor &customCursor)
205 {
206  CursorImageProvider::instance()->setCustomCursor(customCursor);
207 }
208 
209 QQuickItem* MousePointer::confiningItem() const
210 {
211  return m_confiningItem.data();
212 }
213 
214 void MousePointer::setConfiningItem(QQuickItem *item)
215 {
216  if (item != m_confiningItem) {
217  m_confiningItem = item;
218  Q_EMIT confiningItemChanged();
219  }
220 }