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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 "qguieventdispatcher_glib_p.h" |
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43 |
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44 #include "qapplication.h" |
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45 #include "qx11info_x11.h" |
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46 |
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47 #include "qt_x11_p.h" |
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48 |
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49 #include <glib.h> |
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50 |
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51 QT_BEGIN_NAMESPACE |
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52 |
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53 struct GX11EventSource |
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54 { |
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55 GSource source; |
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56 GPollFD pollfd; |
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57 QEventLoop::ProcessEventsFlags flags; |
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58 QGuiEventDispatcherGlib *q; |
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59 QGuiEventDispatcherGlibPrivate *d; |
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60 }; |
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61 |
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62 class QGuiEventDispatcherGlibPrivate : public QEventDispatcherGlibPrivate |
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63 { |
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64 Q_DECLARE_PUBLIC(QGuiEventDispatcherGlib) |
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65 |
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66 public: |
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67 QGuiEventDispatcherGlibPrivate(); |
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68 GX11EventSource *x11EventSource; |
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69 QList<XEvent> queuedUserInputEvents; |
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70 }; |
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71 |
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72 static gboolean x11EventSourcePrepare(GSource *s, gint *timeout) |
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73 { |
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74 if (timeout) |
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75 *timeout = -1; |
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76 GX11EventSource *source = reinterpret_cast<GX11EventSource *>(s); |
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77 return (XEventsQueued(X11->display, QueuedAfterFlush) |
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78 || (!(source->flags & QEventLoop::ExcludeUserInputEvents) |
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79 && !source->d->queuedUserInputEvents.isEmpty())); |
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80 } |
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81 |
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82 static gboolean x11EventSourceCheck(GSource *s) |
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83 { |
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84 GX11EventSource *source = reinterpret_cast<GX11EventSource *>(s); |
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85 return (XEventsQueued(X11->display, QueuedAfterFlush) |
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86 || (!(source->flags & QEventLoop::ExcludeUserInputEvents) |
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87 && !source->d->queuedUserInputEvents.isEmpty())); |
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88 } |
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89 |
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90 static gboolean x11EventSourceDispatch(GSource *s, GSourceFunc callback, gpointer user_data) |
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91 { |
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92 GX11EventSource *source = reinterpret_cast<GX11EventSource *>(s); |
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93 |
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94 ulong marker = XNextRequest(X11->display); |
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95 do { |
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96 XEvent event; |
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97 if (!(source->flags & QEventLoop::ExcludeUserInputEvents) |
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98 && !source->d->queuedUserInputEvents.isEmpty()) { |
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99 // process a pending user input event |
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100 event = source->d->queuedUserInputEvents.takeFirst(); |
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101 } else if (XEventsQueued(X11->display, QueuedAlready)) { |
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102 // process events from the X server |
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103 XNextEvent(X11->display, &event); |
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104 |
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105 if (source->flags & QEventLoop::ExcludeUserInputEvents) { |
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106 // queue user input events |
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107 switch (event.type) { |
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108 case ButtonPress: |
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109 case ButtonRelease: |
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110 case MotionNotify: |
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111 case XKeyPress: |
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112 case XKeyRelease: |
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113 case EnterNotify: |
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114 case LeaveNotify: |
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115 source->d->queuedUserInputEvents.append(event); |
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116 continue; |
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117 |
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118 case ClientMessage: |
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119 // only keep the wm_take_focus and |
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120 // _qt_scrolldone protocols, queue all other |
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121 // client messages |
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122 if (event.xclient.format == 32) { |
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123 if (event.xclient.message_type == ATOM(WM_PROTOCOLS) && |
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124 (Atom) event.xclient.data.l[0] == ATOM(WM_TAKE_FOCUS)) { |
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125 break; |
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126 } else if (event.xclient.message_type == ATOM(_QT_SCROLL_DONE)) { |
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127 break; |
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128 } |
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129 } |
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130 source->d->queuedUserInputEvents.append(event); |
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131 continue; |
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132 |
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133 default: |
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134 break; |
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135 } |
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136 } |
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137 } else { |
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138 // no event to process |
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139 break; |
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140 } |
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141 |
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142 // send through event filter |
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143 if (source->q->filterEvent(&event)) |
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144 continue; |
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145 |
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146 if (qApp->x11ProcessEvent(&event) == 1) |
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147 return true; |
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148 |
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149 if (event.xany.serial >= marker) |
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150 goto out; |
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151 } while (XEventsQueued(X11->display, QueuedAfterFlush)); |
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152 |
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153 out: |
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154 |
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155 if (callback) |
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156 callback(user_data); |
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157 return true; |
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158 } |
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159 |
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160 static GSourceFuncs x11EventSourceFuncs = { |
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161 x11EventSourcePrepare, |
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162 x11EventSourceCheck, |
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163 x11EventSourceDispatch, |
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164 NULL, |
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165 NULL, |
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166 NULL |
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167 }; |
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168 |
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169 QGuiEventDispatcherGlibPrivate::QGuiEventDispatcherGlibPrivate() |
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170 { |
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171 x11EventSource = reinterpret_cast<GX11EventSource *>(g_source_new(&x11EventSourceFuncs, |
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172 sizeof(GX11EventSource))); |
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173 g_source_set_can_recurse(&x11EventSource->source, true); |
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174 |
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175 memset(&x11EventSource->pollfd, 0, sizeof(GPollFD)); |
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176 x11EventSource->flags = QEventLoop::AllEvents; |
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177 x11EventSource->q = 0; |
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178 x11EventSource->d = 0; |
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179 |
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180 g_source_attach(&x11EventSource->source, mainContext); |
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181 } |
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182 |
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183 QGuiEventDispatcherGlib::QGuiEventDispatcherGlib(QObject *parent) |
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184 : QEventDispatcherGlib(*new QGuiEventDispatcherGlibPrivate, parent) |
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185 { |
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186 } |
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187 |
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188 QGuiEventDispatcherGlib::~QGuiEventDispatcherGlib() |
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189 { |
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190 Q_D(QGuiEventDispatcherGlib); |
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191 |
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192 g_source_remove_poll(&d->x11EventSource->source, &d->x11EventSource->pollfd); |
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193 g_source_destroy(&d->x11EventSource->source); |
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194 d->x11EventSource = 0; |
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195 } |
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196 |
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197 bool QGuiEventDispatcherGlib::processEvents(QEventLoop::ProcessEventsFlags flags) |
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198 { |
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199 Q_D(QGuiEventDispatcherGlib); |
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200 QEventLoop::ProcessEventsFlags saved_flags = d->x11EventSource->flags; |
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201 d->x11EventSource->flags = flags; |
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202 bool returnValue = QEventDispatcherGlib::processEvents(flags); |
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203 d->x11EventSource->flags = saved_flags; |
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204 return returnValue; |
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205 } |
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206 |
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207 void QGuiEventDispatcherGlib::startingUp() |
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208 { |
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209 Q_D(QGuiEventDispatcherGlib); |
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210 d->x11EventSource->pollfd.fd = XConnectionNumber(X11->display); |
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211 d->x11EventSource->pollfd.events = G_IO_IN | G_IO_HUP | G_IO_ERR; |
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212 d->x11EventSource->q = this; |
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213 d->x11EventSource->d = d; |
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214 g_source_add_poll(&d->x11EventSource->source, &d->x11EventSource->pollfd); |
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215 } |
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216 |
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217 QT_END_NAMESPACE |