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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the QtGui module of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #include "qplatformdefs.h" |
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43 #include "qmouseqnx_qws.h" |
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44 |
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45 #include "qsocketnotifier.h" |
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46 #include "qdebug.h" |
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47 |
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48 #include <sys/dcmd_input.h> |
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49 |
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50 #include <errno.h> |
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51 |
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52 QT_BEGIN_NAMESPACE |
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53 |
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54 /*! |
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55 \class QQnxMouseHandler |
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56 \preliminary |
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57 \ingroup qws |
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58 \internal |
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59 \since 4.6 |
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60 |
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61 \brief The QQnxMouseHandler class implements a mouse driver |
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62 for the QNX \c{devi-hid} input manager. |
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63 |
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64 To be able to compile this mouse handler, \l{Qt for Embedded Linux} |
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65 must be configured with the \c -qt-mouse-qnx option, see the |
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66 \l{Qt for Embedded Linux Pointer Handling}{Pointer Handling} documentation for details. |
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67 |
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68 In order to use this mouse handler, the \c{devi-hid} input manager |
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69 must be set up and run with the resource manager interface (option \c{-r}). |
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70 Also, Photon must not be running. |
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71 |
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72 Example invocation from command line: \c{/usr/photon/bin/devi-hid -Pr kbd mouse} |
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73 Note that after running \c{devi-hid}, you will not be able to use the local |
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74 shell anymore. It is suggested to run the command in a shell scrip, that launches |
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75 a Qt application after invocation of \c{devi-hid}. |
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76 |
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77 To make \l{Qt for Embedded Linux} explicitly choose the qnx mouse |
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78 handler, set the QWS_MOUSE_PROTO environment variable to \c{qnx}. By default, |
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79 the first mouse device (\c{/dev/devi/mouse0}) is used. To override, pass a device |
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80 name as the first and only parameter, for example |
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81 \c{QWS_MOUSE_PROTO=qnx:/dev/devi/mouse1; export QWS_MOUSE_PROTO}. |
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82 |
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83 \sa {Qt for Embedded Linux Pointer Handling}{Pointer Handling}, {Qt for Embedded Linux} |
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84 */ |
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85 |
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86 /*! |
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87 Constructs a mouse handler for the specified \a device, defaulting to \c{/dev/devi/mouse0}. |
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88 The \a driver parameter must be \c{"qnx"}. |
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89 |
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90 Note that you should never instanciate this class, instead let QMouseDriverFactory |
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91 handle the mouse handlers. |
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92 |
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93 \sa QMouseDriverFactory |
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94 */ |
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95 QQnxMouseHandler::QQnxMouseHandler(const QString & /*driver*/, const QString &device) |
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96 { |
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97 // open the mouse device with O_NONBLOCK so reading won't block when there's no data |
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98 mouseFD = QT_OPEN(device.isEmpty() ? "/dev/devi/mouse0" : device.toLatin1().constData(), |
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99 QT_OPEN_RDONLY | O_NONBLOCK); |
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100 if (mouseFD == -1) { |
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101 qErrnoWarning(errno, "QQnxMouseHandler: Unable to open mouse device"); |
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102 return; |
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103 } |
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104 |
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105 // register a socket notifier on the file descriptor so we'll wake up whenever |
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106 // there's a mouse move waiting for us. |
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107 mouseNotifier = new QSocketNotifier(mouseFD, QSocketNotifier::Read, this); |
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108 connect(mouseNotifier, SIGNAL(activated(int)), SLOT(socketActivated())); |
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109 |
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110 qDebug() << "QQnxMouseHandler: connected."; |
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111 } |
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112 |
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113 /*! |
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114 Destroys this mouse handler and closes the connection to the mouse device. |
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115 */ |
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116 QQnxMouseHandler::~QQnxMouseHandler() |
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117 { |
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118 QT_CLOSE(mouseFD); |
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119 } |
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120 |
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121 /*! \reimp */ |
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122 void QQnxMouseHandler::resume() |
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123 { |
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124 if (mouseNotifier) |
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125 mouseNotifier->setEnabled(true); |
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126 } |
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127 |
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128 /*! \reimp */ |
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129 void QQnxMouseHandler::suspend() |
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130 { |
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131 if (mouseNotifier) |
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132 mouseNotifier->setEnabled(false); |
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133 } |
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134 |
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135 /*! \internal |
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136 |
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137 This function is called whenever there is activity on the mouse device. |
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138 By default, it reads up to 10 mouse move packets and calls mouseChanged() |
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139 for each of them. |
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140 */ |
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141 void QQnxMouseHandler::socketActivated() |
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142 { |
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143 // _mouse_packet is a QNX structure. devi-hid is nice enough to translate |
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144 // the raw byte data from mouse devices into generic format for us. |
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145 _mouse_packet packet; |
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146 |
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147 int iteration = 0; |
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148 |
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149 // read mouse events in batches of 10. Since we're getting quite a lot |
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150 // of mouse events, it's better to do them in batches than to return to the |
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151 // event loop every time. |
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152 do { |
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153 int bytesRead = QT_READ(mouseFD, &packet, sizeof(packet)); |
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154 if (bytesRead == -1) { |
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155 // EAGAIN means that there are no more mouse events to read |
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156 if (errno != EAGAIN) |
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157 qErrnoWarning(errno, "QQnxMouseHandler: Unable to read from socket"); |
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158 return; |
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159 } |
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160 |
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161 // bytes read should always be equal to the size of a packet. |
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162 Q_ASSERT(bytesRead == sizeof(packet)); |
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163 |
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164 // translate the coordinates from the QNX data structure to Qt coordinates |
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165 // note the swapped y axis |
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166 QPoint pos = mousePos; |
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167 pos += QPoint(packet.dx, -packet.dy); |
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168 |
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169 // QNX only tells us relative mouse movements, not absolute ones, so limit the |
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170 // cursor position manually to the screen |
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171 limitToScreen(pos); |
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172 |
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173 // translate the QNX mouse button bitmask to Qt buttons |
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174 int buttons = Qt::NoButton; |
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175 |
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176 if (packet.hdr.buttons & _POINTER_BUTTON_LEFT) |
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177 buttons |= Qt::LeftButton; |
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178 if (packet.hdr.buttons & _POINTER_BUTTON_MIDDLE) |
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179 buttons |= Qt::MidButton; |
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180 if (packet.hdr.buttons & _POINTER_BUTTON_RIGHT) |
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181 buttons |= Qt::RightButton; |
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182 |
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183 // call mouseChanged() - this does all the magic to actually move the on-screen |
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184 // mouse cursor. |
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185 mouseChanged(pos, buttons, 0); |
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186 } while (++iteration < 11); |
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187 } |
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188 |
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189 QT_END_NAMESPACE |
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190 |