Mercurial > sdl-ios-xcode
annotate src/video/SDL_cursor.c @ 1670:eef792d31de8 SDL-1.3
Work in progress. :)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 07 Jun 2006 16:10:28 +0000 |
| parents | 4da1ee79c9af |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 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 |
| 0 | 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. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
|
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13 Lesser General Public License for more details. |
| 0 | 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 |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* General cursor handling code for SDL */ | |
| 25 | |
| 26 #include "SDL_video.h" | |
| 27 #include "SDL_mouse.h" | |
| 28 #include "SDL_sysvideo.h" | |
| 29 #include "SDL_cursor_c.h" | |
| 30 #include "default_cursor.h" | |
| 31 | |
| 32 /* These are static for our cursor handling code */ | |
| 1670 | 33 /* FIXME: Add support for multiple simultaneous cursors */ |
| 0 | 34 volatile int SDL_cursorstate = CURSOR_VISIBLE; |
| 35 SDL_Cursor *SDL_cursor = NULL; | |
| 36 static SDL_Cursor *SDL_defcursor = NULL; | |
| 37 | |
| 38 /* Public functions */ | |
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39 void |
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40 SDL_CursorQuit(void) |
| 0 | 41 { |
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42 if (SDL_cursor != NULL) { |
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43 SDL_Cursor *cursor; |
| 0 | 44 |
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45 SDL_cursorstate &= ~CURSOR_VISIBLE; |
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46 if (SDL_cursor != SDL_defcursor) { |
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47 SDL_FreeCursor(SDL_cursor); |
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48 } |
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49 SDL_cursor = NULL; |
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50 if (SDL_defcursor != NULL) { |
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51 cursor = SDL_defcursor; |
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52 SDL_defcursor = NULL; |
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53 SDL_FreeCursor(cursor); |
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54 } |
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55 } |
| 0 | 56 } |
| 1670 | 57 |
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58 int |
| 1670 | 59 SDL_CursorInit(void) |
| 0 | 60 { |
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61 /* We don't have mouse focus, and the cursor isn't drawn yet */ |
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62 #ifndef IPOD |
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63 SDL_cursorstate = CURSOR_VISIBLE; |
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64 #endif |
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66 /* Create the default cursor */ |
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67 if (SDL_defcursor == NULL) { |
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68 SDL_defcursor = SDL_CreateCursor(default_cdata, default_cmask, |
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69 DEFAULT_CWIDTH, DEFAULT_CHEIGHT, |
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70 DEFAULT_CHOTX, DEFAULT_CHOTY); |
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71 SDL_SetCursor(SDL_defcursor); |
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72 } |
| 0 | 73 |
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74 /* That's it! */ |
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75 return (0); |
| 0 | 76 } |
| 77 | |
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78 SDL_Cursor * |
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79 SDL_CreateCursor(Uint8 * data, Uint8 * mask, |
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80 int w, int h, int hot_x, int hot_y) |
| 0 | 81 { |
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82 SDL_VideoDevice *_this = SDL_GetVideoDevice(); |
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83 SDL_Cursor *cursor; |
| 0 | 84 |
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85 /* Make sure the width is a multiple of 8 */ |
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86 w = ((w + 7) & ~7); |
| 0 | 87 |
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88 /* Sanity check the hot spot */ |
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89 if ((hot_x < 0) || (hot_y < 0) || (hot_x >= w) || (hot_y >= h)) { |
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90 SDL_SetError("Cursor hot spot doesn't lie within cursor"); |
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91 return (NULL); |
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92 } |
| 0 | 93 |
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94 if (_this->CreateWMCursor) { |
| 1670 | 95 cursor = _this->CreateWMCursor(_this, data, mask, w, h, hot_x, hot_y); |
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96 } else { |
| 1670 | 97 cursor = NULL; |
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98 } |
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99 return (cursor); |
| 0 | 100 } |
| 101 | |
| 102 /* SDL_SetCursor(NULL) can be used to force the cursor redraw, | |
| 103 if this is desired for any reason. This is used when setting | |
| 104 the video mode and when the SDL window gains the mouse focus. | |
| 105 */ | |
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106 void |
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107 SDL_SetCursor(SDL_Cursor * cursor) |
| 0 | 108 { |
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109 SDL_VideoDevice *_this = SDL_GetVideoDevice(); |
| 0 | 110 |
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111 /* Make sure that the video subsystem has been initialized */ |
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112 if (!_this) { |
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113 return; |
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114 } |
| 0 | 115 |
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116 /* Set the new cursor */ |
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117 if (cursor && (cursor != SDL_cursor)) { |
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118 SDL_cursor = cursor; |
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119 } |
| 0 | 120 |
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121 /* Draw the new mouse cursor */ |
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122 if (SDL_cursor && (SDL_cursorstate & CURSOR_VISIBLE)) { |
| 1670 | 123 if (_this->ShowWMCursor) { |
| 124 _this->ShowWMCursor(_this, SDL_cursor); | |
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125 } |
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126 } else { |
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127 /* Erase window manager mouse (cursor not visible) */ |
| 1670 | 128 if (_this->ShowWMCursor) { |
| 129 _this->ShowWMCursor(_this, NULL); | |
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130 } |
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131 } |
| 0 | 132 } |
| 133 | |
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134 SDL_Cursor * |
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135 SDL_GetCursor(void) |
| 0 | 136 { |
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137 return (SDL_cursor); |
| 0 | 138 } |
| 139 | |
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140 void |
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141 SDL_FreeCursor(SDL_Cursor * cursor) |
| 0 | 142 { |
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143 if (cursor) { |
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144 if (cursor == SDL_cursor) { |
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145 SDL_SetCursor(SDL_defcursor); |
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146 } |
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147 if (cursor != SDL_defcursor) { |
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148 SDL_VideoDevice *_this = SDL_GetVideoDevice(); |
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149 |
| 1670 | 150 if (_this && _this->FreeWMCursor) { |
| 151 _this->FreeWMCursor(_this, cursor); | |
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152 } |
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153 } |
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154 } |
| 0 | 155 } |
| 156 | |
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157 int |
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158 SDL_ShowCursor(int toggle) |
| 0 | 159 { |
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160 int showing; |
| 0 | 161 |
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162 showing = (SDL_cursorstate & CURSOR_VISIBLE); |
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163 if (toggle >= 0) { |
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164 if (toggle) { |
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165 SDL_cursorstate |= CURSOR_VISIBLE; |
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166 } else { |
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167 SDL_cursorstate &= ~CURSOR_VISIBLE; |
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168 } |
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169 if ((SDL_cursorstate & CURSOR_VISIBLE) != showing) { |
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170 SDL_VideoDevice *_this = SDL_GetVideoDevice(); |
| 0 | 171 |
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172 SDL_SetCursor(NULL); |
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173 if (_this && _this->CheckMouseMode) { |
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174 _this->CheckMouseMode(_this); |
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175 } |
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176 } |
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177 } else { |
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178 /* Query current state */ ; |
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179 } |
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180 return (showing ? 1 : 0); |
| 0 | 181 } |
| 182 | |
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183 void |
| 1670 | 184 SDL_WarpMouseInWindow(SDL_WindowID windowID, int x, int y) |
| 0 | 185 { |
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186 SDL_VideoDevice *_this = SDL_GetVideoDevice(); |
| 0 | 187 |
| 1670 | 188 /* FIXME: This should specify the target window */ |
| 189 if (!_this || !SDL_CurrentDisplay.num_windows) { | |
| 190 SDL_SetError("A window must be created before warping mouse"); | |
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191 return; |
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192 } |
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193 |
| 1670 | 194 if (!windowID) { |
| 195 windowID = SDL_CurrentWindow; | |
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196 } |
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197 |
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198 /* This generates a mouse motion event */ |
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199 if (_this->WarpWMCursor) { |
| 1670 | 200 _this->WarpWMCursor(_this, windowID, x, y); |
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201 } |
| 0 | 202 } |
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203 |
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204 /* vi: set ts=4 sw=4 expandtab: */ |