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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 "qwidget.h" |
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43 #include "qpixmap.h" |
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44 #include "qx11info_x11.h" |
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45 #include "qt_x11_p.h" |
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46 |
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47 QT_BEGIN_NAMESPACE |
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48 |
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49 /*! |
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50 \class QX11Info |
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51 \brief The QX11Info class provides information about the X display |
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52 configuration. |
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53 |
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54 \ingroup shared |
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55 |
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56 The class provides two APIs: a set of non-static functions that |
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57 provide information about a specific widget or pixmap, and a set |
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58 of static functions that provide the default information for the |
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59 application. |
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60 |
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61 \warning This class is only available on X11. For querying |
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62 per-screen information in a portable way, use QDesktopWidget. |
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63 |
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64 \sa QWidget::x11Info(), QPixmap::x11Info(), QDesktopWidget |
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65 */ |
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66 |
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67 /*! |
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68 Constructs an empty QX11Info object. |
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69 */ |
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70 QX11Info::QX11Info() |
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71 : x11data(0) |
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72 { |
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73 } |
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74 |
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75 /*! |
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76 Constructs a copy of \a other. |
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77 */ |
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78 QX11Info::QX11Info(const QX11Info &other) |
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79 { |
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80 x11data = other.x11data; |
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81 if (x11data) |
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82 ++x11data->ref; |
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83 } |
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84 |
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85 /*! |
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86 Assigns \a other to this object and returns a reference to this |
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87 object. |
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88 */ |
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89 QX11Info &QX11Info::operator=(const QX11Info &other) |
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90 { |
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91 if (other.x11data) |
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92 ++other.x11data->ref; |
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93 if (x11data && !--x11data->ref) |
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94 delete x11data; |
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95 x11data = other.x11data; |
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96 return *this; |
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97 } |
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98 |
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99 /*! |
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100 Destroys the QX11Info object. |
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101 */ |
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102 QX11Info::~QX11Info() |
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103 { |
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104 if (x11data && !--x11data->ref) |
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105 delete x11data; |
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106 } |
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107 |
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108 /*! |
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109 \internal |
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110 Makes a shallow copy of the X11-specific data of \a fromDevice, if it is not |
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111 null. Otherwise this function sets it to null. |
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112 */ |
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113 |
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114 void QX11Info::copyX11Data(const QPaintDevice *fromDevice) |
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115 { |
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116 QX11InfoData *xd = 0; |
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117 if (fromDevice) { |
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118 if (fromDevice->devType() == QInternal::Widget) |
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119 xd = static_cast<const QWidget *>(fromDevice)->x11Info().x11data; |
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120 else if (fromDevice->devType() == QInternal::Pixmap) |
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121 xd = static_cast<const QPixmap *>(fromDevice)->x11Info().x11data; |
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122 } |
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123 setX11Data(xd); |
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124 } |
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125 |
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126 /*! |
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127 \internal |
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128 Makes a deep copy of the X11-specific data of \a fromDevice, if it is not |
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129 null. Otherwise this function sets it to null. |
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130 */ |
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131 |
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132 void QX11Info::cloneX11Data(const QPaintDevice *fromDevice) |
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133 { |
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134 QX11InfoData *d = 0; |
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135 if (fromDevice) { |
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136 QX11InfoData *xd; |
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137 if (fromDevice->devType() == QInternal::Widget) { |
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138 xd = static_cast<const QWidget *>(fromDevice)->x11Info().x11data; |
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139 } else { |
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140 Q_ASSERT(fromDevice->devType() == QInternal::Pixmap); |
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141 xd = static_cast<const QPixmap *>(fromDevice)->x11Info().x11data; |
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142 } |
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143 d = new QX11InfoData(*xd); |
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144 d->ref = 0; |
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145 } |
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146 setX11Data(d); |
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147 } |
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148 |
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149 /*! |
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150 \internal |
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151 Makes a shallow copy of the X11-specific data \a d and assigns it to this |
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152 class. This function increments the reference code of \a d. |
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153 */ |
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154 |
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155 void QX11Info::setX11Data(const QX11InfoData* d) |
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156 { |
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157 if (x11data && !--x11data->ref) |
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158 delete x11data; |
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159 x11data = (QX11InfoData *)d; |
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160 if (x11data) |
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161 ++x11data->ref; |
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162 } |
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163 |
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164 |
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165 /*! |
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166 \internal |
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167 If \a def is false, returns a deep copy of the x11Data, or 0 if x11Data is 0. |
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168 If \a def is true, makes a QX11Data struct filled with the default |
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169 values. |
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170 |
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171 In either case the caller is responsible for deleting the returned |
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172 struct. But notice that the struct is a shared class, so other |
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173 classes might also have a reference to it. The reference count of |
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174 the returned QX11Data* is 0. |
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175 */ |
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176 |
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177 QX11InfoData* QX11Info::getX11Data(bool def) const |
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178 { |
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179 QX11InfoData* res = 0; |
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180 if (def) { |
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181 res = new QX11InfoData; |
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182 res->ref = 0; |
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183 res->screen = appScreen(); |
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184 res->depth = appDepth(); |
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185 res->cells = appCells(); |
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186 res->colormap = colormap(); |
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187 res->defaultColormap = appDefaultColormap(); |
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188 res->visual = (Visual*) appVisual(); |
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189 res->defaultVisual = appDefaultVisual(); |
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190 } else if (x11data) { |
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191 res = new QX11InfoData; |
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192 *res = *x11data; |
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193 res->ref = 0; |
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194 } |
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195 return res; |
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196 } |
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197 |
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198 /*! |
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199 Returns the horizontal resolution of the given \a screen in terms of the |
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200 number of dots per inch. |
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201 |
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202 The \a screen argument is an X screen number. Be aware that if |
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203 the user's system uses Xinerama (as opposed to traditional X11 |
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204 multiscreen), there is only one X screen. Use QDesktopWidget to |
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205 query for information about Xinerama screens. |
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206 |
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207 \sa setAppDpiX(), appDpiY() |
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208 */ |
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209 int QX11Info::appDpiX(int screen) |
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210 { |
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211 if (!X11) |
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212 return 75; |
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213 if (screen < 0) |
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214 screen = X11->defaultScreen; |
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215 if (screen > X11->screenCount) |
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216 return 0; |
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217 return X11->screens[screen].dpiX; |
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218 } |
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219 |
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220 /*! |
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221 Sets the horizontal resolution of the given \a screen to the number of |
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222 dots per inch specified by \a xdpi. |
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223 |
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224 The \a screen argument is an X screen number. Be aware that if |
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225 the user's system uses Xinerama (as opposed to traditional X11 |
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226 multiscreen), there is only one X screen. Use QDesktopWidget to |
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227 query for information about Xinerama screens. |
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228 |
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229 \sa appDpiX(), setAppDpiY() |
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230 */ |
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231 |
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232 void QX11Info::setAppDpiX(int screen, int xdpi) |
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233 { |
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234 if (!X11) |
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235 return; |
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236 if (screen < 0) |
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237 screen = X11->defaultScreen; |
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238 if (screen > X11->screenCount) |
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239 return; |
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240 X11->screens[screen].dpiX = xdpi; |
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241 } |
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242 |
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243 /*! |
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244 Returns the vertical resolution of the given \a screen in terms of the |
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245 number of dots per inch. |
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246 |
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247 The \a screen argument is an X screen number. Be aware that if |
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248 the user's system uses Xinerama (as opposed to traditional X11 |
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249 multiscreen), there is only one X screen. Use QDesktopWidget to |
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250 query for information about Xinerama screens. |
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251 |
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252 \sa setAppDpiY(), appDpiX() |
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253 */ |
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254 |
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255 int QX11Info::appDpiY(int screen) |
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256 { |
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257 if (!X11) |
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258 return 75; |
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259 if (screen < 0) |
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260 screen = X11->defaultScreen; |
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261 if (screen > X11->screenCount) |
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262 return 0; |
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263 return X11->screens[screen].dpiY; |
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264 } |
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265 |
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266 /*! |
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267 Sets the vertical resolution of the given \a screen to the number of |
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268 dots per inch specified by \a ydpi. |
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269 |
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270 The \a screen argument is an X screen number. Be aware that if |
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271 the user's system uses Xinerama (as opposed to traditional X11 |
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272 multiscreen), there is only one X screen. Use QDesktopWidget to |
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273 query for information about Xinerama screens. |
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274 |
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275 \sa appDpiY(), setAppDpiX() |
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276 */ |
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277 void QX11Info::setAppDpiY(int screen, int ydpi) |
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278 { |
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279 if (!X11) |
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280 return; |
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281 if (screen < 0) |
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282 screen = X11->defaultScreen; |
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283 if (screen > X11->screenCount) |
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284 return; |
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285 X11->screens[screen].dpiY = ydpi; |
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286 } |
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287 |
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288 /*! |
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289 Returns the X11 time. |
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290 |
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291 \sa setAppTime(), appUserTime() |
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292 */ |
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293 unsigned long QX11Info::appTime() |
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294 { |
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295 return X11 ? X11->time : 0; |
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296 } |
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297 |
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298 /*! |
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299 Sets the X11 time to the value specified by \a time. |
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300 |
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301 \sa appTime(), setAppUserTime() |
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302 */ |
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303 void QX11Info::setAppTime(unsigned long time) |
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304 { |
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305 if (X11) { |
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306 X11->time = time; |
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307 } |
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308 } |
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309 |
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310 /*! |
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311 Returns the X11 user time. |
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312 |
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313 \sa setAppUserTime(), appTime() |
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314 */ |
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315 unsigned long QX11Info::appUserTime() |
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316 { |
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317 return X11 ? X11->userTime : 0; |
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318 } |
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319 |
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320 /*! |
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321 Sets the X11 user time as specified by \a time. |
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322 |
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323 \sa appUserTime(), setAppTime() |
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324 */ |
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325 void QX11Info::setAppUserTime(unsigned long time) |
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326 { |
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327 if (X11) { |
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328 X11->userTime = time; |
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329 } |
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330 } |
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331 |
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332 |
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333 /*! |
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334 \fn const char *QX11Info::appClass() |
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335 |
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336 Returns the X11 application class. |
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337 |
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338 \sa display() |
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339 */ |
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340 |
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341 /*! |
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342 Returns the default display for the application. |
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343 |
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344 \sa appScreen() |
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345 */ |
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346 |
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347 Display *QX11Info::display() |
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348 { |
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349 return X11 ? X11->display : 0; |
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350 } |
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351 |
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352 /*! |
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353 Returns the number of the screen where the application is being |
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354 displayed. |
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355 |
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356 \sa display(), screen() |
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357 */ |
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358 int QX11Info::appScreen() |
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359 { |
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360 return X11 ? X11->defaultScreen : 0; |
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361 } |
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362 |
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363 /*! |
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364 Returns a handle for the application's color map on the given \a screen. |
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365 |
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366 The \a screen argument is an X screen number. Be aware that if |
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367 the user's system uses Xinerama (as opposed to traditional X11 |
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368 multiscreen), there is only one X screen. Use QDesktopWidget to |
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369 query for information about Xinerama screens. |
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370 |
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371 \sa colormap(), defaultColormap() |
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372 */ |
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373 Qt::HANDLE QX11Info::appColormap(int screen) |
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374 { |
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375 return X11 ? X11->screens[screen == -1 ? X11->defaultScreen : screen].colormap : 0; |
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376 } |
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377 |
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378 /*! |
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379 Returns the current visual used by the application on the given |
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380 \a screen. |
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381 |
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382 The \a screen argument is an X screen number. Be aware that if |
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383 the user's system uses Xinerama (as opposed to traditional X11 |
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384 multiscreen), there is only one X screen. Use QDesktopWidget to |
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385 query for information about Xinerama screens. |
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386 |
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387 \sa visual(), defaultVisual() |
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388 */ |
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389 |
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390 void *QX11Info::appVisual(int screen) |
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391 { |
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392 return X11 ? X11->screens[screen == -1 ? X11->defaultScreen : screen].visual : 0; |
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393 } |
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394 |
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395 /*! |
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396 Returns a handle for the applications root window on the given \a screen. |
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397 |
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398 The \a screen argument is an X screen number. Be aware that if |
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399 the user's system uses Xinerama (as opposed to traditional X11 |
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400 multiscreen), there is only one X screen. Use QDesktopWidget to |
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401 query for information about Xinerama screens. |
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402 |
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403 \sa QApplication::desktop() |
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404 */ |
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405 Qt::HANDLE QX11Info::appRootWindow(int screen) |
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406 { |
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407 return X11 ? RootWindow(X11->display, screen == -1 ? X11->defaultScreen : screen) : 0; |
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408 } |
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409 |
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410 /*! |
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411 Returns the color depth (bits per pixel) used by the application on the |
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412 given \a screen. |
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413 |
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414 The \a screen argument is an X screen number. Be aware that if |
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415 the user's system uses Xinerama (as opposed to traditional X11 |
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416 multiscreen), there is only one X screen. Use QDesktopWidget to |
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417 query for information about Xinerama screens. |
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418 |
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419 \sa depth() |
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420 */ |
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421 |
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422 int QX11Info::appDepth(int screen) |
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423 { |
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424 return X11 ? X11->screens[screen == -1 ? X11->defaultScreen : screen].depth : 32; |
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425 } |
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426 |
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427 /*! |
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428 Returns the number of cells used by the application on the given \a screen. |
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429 |
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430 The \a screen argument is an X screen number. Be aware that if |
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431 the user's system uses Xinerama (as opposed to traditional X11 |
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432 multiscreen), there is only one X screen. Use QDesktopWidget to |
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433 query for information about Xinerama screens. |
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434 |
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435 \sa cells() |
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436 */ |
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437 |
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438 int QX11Info::appCells(int screen) |
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439 { return X11 ? X11->screens[screen == -1 ? X11->defaultScreen : screen].cells : 0; } |
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440 |
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441 /*! |
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442 Returns true if the application has a default color map on the given |
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443 \a screen; otherwise returns false. |
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444 |
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445 The \a screen argument is an X screen number. Be aware that if |
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446 the user's system uses Xinerama (as opposed to traditional X11 |
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447 multiscreen), there is only one X screen. Use QDesktopWidget to |
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448 query for information about Xinerama screens. |
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449 */ |
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450 bool QX11Info::appDefaultColormap(int screen) |
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451 { return X11 ? X11->screens[screen == -1 ? X11->defaultScreen : screen].defaultColormap : true; } |
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452 |
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453 /*! |
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454 Returns true if the application has a default visual on the given \a screen; |
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455 otherwise returns false. |
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456 |
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457 The \a screen argument is an X screen number. Be aware that if |
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458 the user's system uses Xinerama (as opposed to traditional X11 |
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459 multiscreen), there is only one X screen. Use QDesktopWidget to |
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460 query for information about Xinerama screens. |
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461 */ |
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462 bool QX11Info::appDefaultVisual(int screen) |
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463 { return X11 ? X11->screens[screen == -1 ? X11->defaultScreen : screen].defaultVisual : true; } |
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464 |
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465 /*! |
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466 Returns the number of the screen currently in use. |
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467 |
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468 The return value is an X screen number. Be aware that if the |
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469 user's system uses Xinerama (as opposed to traditional X11 |
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470 multiscreen), there is only one X screen. Use QDesktopWidget to |
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471 query for information about Xinerama screens. |
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472 |
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473 \sa appScreen() |
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474 */ |
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475 int QX11Info::screen() const |
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476 { return x11data ? x11data->screen : QX11Info::appScreen(); } |
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477 |
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478 /*! |
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479 Returns the color depth (bits per pixel) of the X display. |
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480 |
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481 \sa appDepth() |
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482 */ |
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483 |
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484 int QX11Info::depth() const |
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485 { return x11data ? x11data->depth : QX11Info::appDepth(); } |
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486 |
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487 /*! |
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488 Returns the number of cells. |
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489 |
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490 \sa appCells() |
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491 */ |
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492 |
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493 int QX11Info::cells() const |
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494 { return x11data ? x11data->cells : QX11Info::appCells(); } |
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495 |
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496 /*! |
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497 Returns a handle for the color map. |
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498 |
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499 \sa defaultColormap() |
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500 */ |
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501 |
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502 Qt::HANDLE QX11Info::colormap() const |
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503 { return x11data ? x11data->colormap : QX11Info::appColormap(); } |
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504 |
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505 /*! |
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506 Returns true if there is a default color map; otherwise returns false. |
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507 |
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508 \sa colormap() |
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509 */ |
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510 |
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511 bool QX11Info::defaultColormap() const |
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512 { return x11data ? x11data->defaultColormap : QX11Info::appDefaultColormap(); } |
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513 |
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514 /*! |
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515 Returns the current visual. |
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516 |
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517 \sa appVisual(), defaultVisual() |
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518 */ |
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519 |
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520 void *QX11Info::visual() const |
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521 { return x11data ? x11data->visual : QX11Info::appVisual(); } |
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522 |
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523 /*! |
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524 Returns true if there is a default visual; otherwise returns false. |
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525 |
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526 \sa visual(), appVisual() |
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527 */ |
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528 |
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529 bool QX11Info::defaultVisual() const |
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530 { return x11data ? x11data->defaultVisual : QX11Info::appDefaultVisual(); } |
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531 |
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532 |
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533 /*! |
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534 \since 4.4 |
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535 |
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536 Returns true if there is a compositing manager running. |
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537 */ |
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538 bool QX11Info::isCompositingManagerRunning() |
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539 { |
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540 return X11 ? X11->compositingManagerRunning : false; |
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541 } |
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542 |
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543 QT_END_NAMESPACE |