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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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7 ** This file is part of the documentation of the Qt Toolkit. |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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11 ** This file contains pre-release code and may not be distributed. |
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14 ** this package. |
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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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24 ** In addition, as a special exception, Nokia gives you certain additional |
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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 /*! |
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43 \page qt-embedded-envvars.html |
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44 |
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45 \title Qt for Embedded Linux Environment Variables |
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46 \ingroup qt-embedded-linux |
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47 |
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48 These environment variables are relevant to \l{Qt for Embedded Linux} |
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49 users. |
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50 |
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51 \table |
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52 \header \o Variable \o Description |
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53 |
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54 \row |
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55 \o \bold POINTERCAL_FILE \target POINTERCAL_FILE |
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56 |
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57 \o Specifies the file containing the data used to calibrate the |
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58 pointer device. |
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59 |
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60 See also QWSCalibratedMouseHandler and \l{Qt for Embedded Linux Pointer |
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61 Handling}. |
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62 |
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63 \row |
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64 \o \bold QT_ONSCREEN_PAINT \target QT_ONSCREEN_PAINT |
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65 |
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66 \o If defined, the application will render its widgets directly on |
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67 screen. The affected regions of the screen will not be modified by |
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68 the screen driver unless another window with a higher focus |
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69 requests (parts of) the same region. |
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70 |
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71 Setting this environment variable is equivalent to setting the |
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72 Qt::WA_PaintOnScreen attribute for all the widgets in the |
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73 application. |
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74 |
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75 See also the Qt for Embedded Linux \l{Qt for Embedded Linux Architecture#Graphics |
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76 Rendering}{graphics rendering} documentation. |
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77 |
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78 \row |
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79 \o \bold QWS_SW_CURSOR \target QWS_SW_CURSOR |
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80 \o If defined, the software mouse cursor is always used (even when using an |
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81 accelerated driver that supports a hardware cursor). |
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82 |
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83 \row |
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84 \o \bold QWS_DISPLAY \target QWS_DISPLAY |
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85 \o |
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86 |
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87 Specifies the display type and framebuffer. For example, if the |
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88 current shell is bash, ksh, zsh or sh: |
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89 |
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90 \snippet doc/src/snippets/code/doc_src_emb-envvars.qdoc 0 |
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91 |
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92 The valid values for the \c <driver> argument are \c LinuxFb, \c |
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93 QVFb, \c VNC, \c Transformed, \c Multi and \l |
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94 {QScreenDriverPlugin::keys()}{keys} identifying custom drivers, |
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95 and the \c {<display num>} argument is used to separate screens |
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96 that are using the same screen driver and to enable multiple |
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97 displays (see the \l {Running Qt for Embedded Linux Applications} |
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98 documentation for more details). |
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99 |
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100 The driver specific options are described in the \l{Qt for Embedded Linux |
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101 Display Management}{display management} documentation. |
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102 |
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103 \row |
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104 \o \bold QWS_SIZE \target QWS_SIZE |
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105 \o |
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106 |
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107 Specifies the size of the \l{Qt for Embedded Linux} window which is centered |
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108 within the screen. For example, if the current shell is bash, ksh, |
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109 zsh or sh: |
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110 |
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111 \snippet doc/src/snippets/code/doc_src_emb-envvars.qdoc 1 |
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112 |
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113 \row |
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114 \o \bold QWS_MOUSE_PROTO \target QWS_MOUSE_PROTO |
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115 \o |
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116 |
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117 Specifies the driver for pointer handling. For example, if the |
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118 current shell is bash, ksh, zsh or sh: |
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119 |
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120 \snippet doc/src/snippets/code/doc_src_emb-envvars.qdoc 2 |
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121 |
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122 The valid values for the \c <driver> argument are \c MouseMan, \c |
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123 IntelliMouse, \c Microsoft, \c VR41xx, \c LinuxTP, \c Yopy. \c |
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124 Tslib and \l {QMouseDriverPlugin::keys()}{keys} identifying |
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125 custom drivers, and the driver specific options are typically a |
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126 device, e.g., \c /dev/mouse for mouse devices and \c /dev/ts for |
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127 touch panels. |
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128 |
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129 Multiple keyboard drivers can be specified in one go: |
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130 |
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131 \snippet doc/src/snippets/code/doc_src_emb-envvars.qdoc 3 |
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132 |
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133 Input will be read from all specified drivers. |
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134 Note that the \c Vr41xx driver also accepts two optional |
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135 arguments: \c press=<value> defining a mouseclick (the default |
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136 value is 750) and \c filter=<value> specifying the length of the |
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137 filter used to eliminate noise (the default length is 3). For |
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138 example: |
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139 |
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140 \snippet doc/src/snippets/code/doc_src_emb-envvars.qdoc 4 |
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141 |
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142 See also \l {Qt for Embedded Linux Pointer Handling}. |
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143 |
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144 \row |
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145 \o \bold QWS_KEYBOARD \target QWS_KEYBOARD |
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146 \o |
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147 |
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148 Specifies the driver and device for character input. For example, if the |
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149 current shell is bash, ksh, zsh or sh: |
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150 |
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151 \snippet doc/src/snippets/code/doc_src_emb-envvars.qdoc 5 |
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152 |
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153 The valid values for the \c <driver> argument are \c SL5000, \c |
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154 Yopy, \c VR41xx, \c TTY, \c USB and \l |
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155 {QKbdDriverPlugin::keys()}{keys} identifying custom drivers, |
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156 and the driver specific options are typically a device, e.g., \c |
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157 /dev/tty0. |
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158 |
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159 Multiple keyboard drivers can be specified in one go: |
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160 |
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161 \snippet doc/src/snippets/code/doc_src_emb-envvars.qdoc 6 |
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162 |
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163 Input will be read from all specified drivers. |
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164 |
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165 See also \l {Qt for Embedded Linux Character Input}. |
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166 |
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167 \endtable |
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168 */ |