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annotate src/video/x11/SDL_x11mouse.c @ 2962:1e242954330b

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Hopefully fixed crash when there are no input devices
author Sam Lantinga <slouken@libsdl.org>
date Fri, 02 Jan 2009 10:30:53 +0000
parents 79dee7da6ba5
children dbff5769d742
rev   line source
1950
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 Sam Lantinga
1950
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23 #include "SDL_x11video.h"
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24 #include "SDL_x11mouse.h"
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25 #include "../../events/SDL_mouse_c.h"
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26
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27 #if SDL_VIDEO_DRIVER_X11_XINPUT
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28 static void
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29 X11_FreeMouse(SDL_Mouse * mouse)
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30 {
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31 X11_MouseData *data = (X11_MouseData *) mouse->driverdata;
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32
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33 if (data) {
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34 XCloseDevice(data->display, data->device);
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35 SDL_free(data);
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36 }
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37 }
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38 #endif
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39
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40 void
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41 X11_InitMouse(_THIS)
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42 {
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43 SDL_Mouse mouse;
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44 #if SDL_VIDEO_DRIVER_X11_XINPUT
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45 Display *display = ((SDL_VideoData *) _this->driverdata)->display;
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46 X11_MouseData *data;
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47 int i, j, n;
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48 XDeviceInfo *DevList;
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49 XAnyClassPtr deviceClass;
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50 int event_code;
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51 XEventClass xEvent;
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52 #endif
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53
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54 SDL_zero(mouse);
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55 SDL_AddMouse(&mouse, "CorePointer", 0, 0, 1);
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56
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57 #if SDL_VIDEO_DRIVER_X11_XINPUT
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58 if (!SDL_X11_HAVE_XINPUT) {
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59 /* should have dynamically loaded, but wasn't available. */
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60 return;
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61 }
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62
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63 /* we're getting the list of input devices */
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64 n = 0;
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65 DevList = XListInputDevices(display, &n);
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66
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67 /* we're aquiring valuators: mice, tablets, etc. */
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68 for (i = 0; i < n; ++i) {
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69 /* if it's the core pointer or core keyborard we don't want it */
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70 if ((DevList[i].use != IsXPointer && DevList[i].use != IsXKeyboard)) {
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71 /* we have to check all of the device classes */
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72 deviceClass = DevList[i].inputclassinfo;
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73 for (j = 0; j < DevList[i].num_classes; ++j) {
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74 if (deviceClass->class == ValuatorClass) { /* bingo ;) */
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75 XValuatorInfo *valInfo;
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76
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77 data = (X11_MouseData *) SDL_calloc(1, sizeof(*data));
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78 if (!data) {
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79 continue;
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80 }
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81 data->display = display;
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82 data->device = XOpenDevice(display, DevList[i].id);
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83
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84 /* motion events */
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85 DeviceMotionNotify(data->device, event_code, xEvent);
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86 if (xEvent) {
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87 data->xevents[data->num_xevents++] = xEvent;
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88 data->motion = event_code;
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89 }
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90
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91 /* button events */
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92 DeviceButtonPress(data->device, event_code, xEvent);
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93 if (xEvent) {
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94 data->xevents[data->num_xevents++] = xEvent;
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95 data->button_pressed = event_code;
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96 }
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97 DeviceButtonRelease(data->device, event_code, xEvent);
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98 if (xEvent) {
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99 data->xevents[data->num_xevents++] = xEvent;
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100 data->button_released = event_code;
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101 }
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102
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103 /* proximity events */
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104 ProximityIn(data->device, event_code, xEvent);
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105 if (xEvent) {
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106 data->xevents[data->num_xevents++] = xEvent;
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107 data->proximity_in = event_code;
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108 }
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109 ProximityOut(data->device, event_code, xEvent);
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110 if (xEvent) {
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111 data->xevents[data->num_xevents++] = xEvent;
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112 data->proximity_out = event_code;
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113 }
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114
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115 SDL_zero(mouse);
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116 mouse.id = DevList[i].id;
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117 mouse.FreeMouse = X11_FreeMouse;
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118 mouse.driverdata = data;
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119
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120 /* lets get the device parameters */
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121 valInfo = (XValuatorInfo *) deviceClass;
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122 /* if the device reports pressure, lets check it parameteres */
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123 if (valInfo->num_axes > 2) {
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124 SDL_AddMouse(&mouse, DevList[i].name,
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125 valInfo->axes[2].max_value,
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126 valInfo->axes[2].min_value, 1);
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127 } else {
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128 SDL_AddMouse(&mouse, DevList[i].name, 0, 0, 1);
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129 }
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130 break;
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131 }
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132 /* if it's not class we're interested in, lets go further */
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133 deviceClass =
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134 (XAnyClassPtr) ((char *) deviceClass +
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135 deviceClass->length);
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136 }
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137 }
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138 }
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139 XFreeDeviceList(DevList);
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140 #endif
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141 }
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142
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143 void
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144 X11_QuitMouse(_THIS)
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145 {
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146 SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
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147
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148 /* !!! FIXME: use XCloseDevice()? Or maybe handle under SDL_MouseQuit()? */
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149
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150 /* let's delete all of the mice */
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151 SDL_MouseQuit();
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152 }
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153
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154 /* vi: set ts=4 sw=4 expandtab: */