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comparison src/touchscreen/nds/SDL_systouchscreen.c @ 2675:5e4274591163 gsoc2008_nds

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Started minor changes to the coordinate system used by the touchscreen API as discussed on the mailing list. Also beginning to separate the 'Pressed' and 'Moved' event handling on the private level.
author Darren Alton <dalton@stevens.edu>
date Sun, 29 Jun 2008 21:32:31 +0000
parents f1d07ba2e275
children 082cc3ffd7d8
comparison
equal deleted inserted replaced
2674:f1d07ba2e275 2675:5e4274591163
80 */ 80 */
81 void 81 void
82 SDL_SYS_TouchscreenUpdate(SDL_Touchscreen * touchscreen) 82 SDL_SYS_TouchscreenUpdate(SDL_Touchscreen * touchscreen)
83 { 83 {
84 u32 keysd, keysu, keysh; 84 u32 keysd, keysu, keysh;
85 int xpos, ypos, pressure = 16384; 85 Uint16 xpos=0, ypos=0, pressure = 32767;
86 touchPosition touch; 86 touchPosition touch;
87 87
88 scanKeys(); 88 scanKeys();
89 keysd = keysDown(); 89 keysd = keysDown();
90 keysh = keysHeld(); 90 keysh = keysHeld();
91 keysu = keysUp(); 91 keysu = keysUp();
92 touch=touchReadXY(); 92 touch=touchReadXY();
93 xpos = (touch.px-128)*256; 93 xpos = (touch.px << 8) + 1;
94 ypos = (touch.py-96)*(65536/192); 94 ypos = (touch.py << 16) / 192 + 1;
95 /* TODO uses touch.x and touch.y for something.
96 we discussed in the mailing list having both "hardware x/y" and
97 "screen x/y" coordinates. */
95 98
96 if (((keysd|keysh) & KEY_TOUCH)) { 99 if ((keysd & KEY_TOUCH)) {
97 SDL_PrivateTouchPress(touchscreen, 0, xpos, ypos, pressure); 100 SDL_PrivateTouchPress(touchscreen, 0, xpos, ypos, pressure);
101 }
102 if ((keysh & KEY_TOUCH)) {
103 SDL_PrivateTouchMove(touchscreen, 0, xpos, ypos, pressure);
98 } 104 }
99 if ((keysu & KEY_TOUCH)) { 105 if ((keysu & KEY_TOUCH)) {
100 SDL_PrivateTouchRelease(touchscreen, 0); 106 SDL_PrivateTouchRelease(touchscreen, 0);
101 } 107 }
102 } 108 }