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annotate test/testgesture.c @ 5282:8e421890cdb8

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Fixed bug #1117 There's a new event that's always sent when the window changes size, and that event is what the renderers listen for to determine if they need to rebind their context.
author Sam Lantinga <slouken@libsdl.org>
date Sat, 12 Feb 2011 19:02:14 -0800
parents c2539ff054c8
children
rev   line source
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1 /* Usage:
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2 * Spacebar to begin recording a gesture on all touches.
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3 * s to save all touches into "./gestureSave"
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4 * l to load all touches from "./gestureSave"
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5 */
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6
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7 #include <stdio.h>
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8 #include <SDL.h>
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9 #include <math.h>
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10 #include <SDL_touch.h>
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11 #include <SDL_gesture.h>
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14 /* Make sure we have good macros for printing 32 and 64 bit values */
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15 #ifndef PRIs32
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16 #define PRIs32 "d"
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17 #endif
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18 #ifndef PRIu32
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19 #define PRIu32 "u"
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20 #endif
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21 #ifndef PRIs64
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22 #ifdef __WIN32__
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23 #define PRIs64 "I64"
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24 #else
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25 #define PRIs64 "lld"
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26 #endif
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27 #endif
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28 #ifndef PRIu64
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29 #ifdef __WIN32__
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30 #define PRIu64 "I64u"
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31 #else
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32 #define PRIu64 "llu"
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33 #endif
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34 #endif
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35
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36 #define WIDTH 640
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37 #define HEIGHT 480
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38 #define BPP 4
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39 #define DEPTH 32
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41 //MUST BE A POWER OF 2!
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42 #define EVENT_BUF_SIZE 256
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45 #define VERBOSE SDL_FALSE
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47 SDL_Event events[EVENT_BUF_SIZE];
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48 int eventWrite;
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50 int colors[7] = {0xFF,0xFF00,0xFF0000,0xFFFF00,0x00FFFF,0xFF00FF,0xFFFFFF};
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51
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52 typedef struct {
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53 float x,y;
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54 } Point;
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55
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56 typedef struct {
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57 float ang,r;
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58 Point p;
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59 } Knob;
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60
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61 Knob knob;
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62
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63 void handler (int sig)
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64 {
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65 printf ("exiting...(%d)\n", sig);
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66 exit (0);
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67 }
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68
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69 void perror_exit (char *error)
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70 {
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71 perror (error);
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72 handler (9);
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73 }
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74
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75 void setpix(SDL_Surface *screen, float _x, float _y, unsigned int col)
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76 {
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77 Uint32 *pixmem32;
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78 Uint32 colour;
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79 Uint8 r,g,b;
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80 int x = (int)_x;
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81 int y = (int)_y;
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82 float a;
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83
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84 if(x < 0 || x > screen->w) return;
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85 if(y < 0 || y > screen->h) return;
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87 pixmem32 = (Uint32*) screen->pixels + y*screen->pitch/BPP + x;
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88
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89 SDL_memcpy(&colour,pixmem32,screen->format->BytesPerPixel);
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91 SDL_GetRGB(colour,screen->format,&r,&g,&b);
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92 //r = 0;g = 0; b = 0;
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93 a = (float)((col>>24)&0xFF);
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94 if(a == 0) a = 0xFF; //Hack, to make things easier.
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95 a /= 0xFF;
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96 r = (Uint8)(r*(1-a) + ((col>>16)&0xFF)*(a));
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97 g = (Uint8)(g*(1-a) + ((col>> 8)&0xFF)*(a));
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98 b = (Uint8)(b*(1-a) + ((col>> 0)&0xFF)*(a));
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99 colour = SDL_MapRGB( screen->format,r, g, b);
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102 *pixmem32 = colour;
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103 }
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105 void drawLine(SDL_Surface *screen,float x0,float y0,float x1,float y1,unsigned int col) {
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106 float t;
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107 for(t=0;t<1;t+=(float)(1.f/SDL_max(SDL_fabs(x0-x1),SDL_fabs(y0-y1))))
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108 setpix(screen,x1+t*(x0-x1),y1+t*(y0-y1),col);
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109 }
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110
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111 void drawCircle(SDL_Surface* screen,float x,float y,float r,unsigned int c)
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112 {
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113 float tx,ty;
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114 float xr;
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115 for(ty = (float)-SDL_fabs(r);ty <= (float)SDL_fabs((int)r);ty++) {
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116 xr = (float)sqrt(r*r - ty*ty);
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117 if(r > 0) { //r > 0 ==> filled circle
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118 for(tx=-xr+.5f;tx<=xr-.5;tx++) {
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119 setpix(screen,x+tx,y+ty,c);
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120 }
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121 }
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122 else {
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123 setpix(screen,x-xr+.5f,y+ty,c);
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124 setpix(screen,x+xr-.5f,y+ty,c);
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125 }
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126 }
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127 }
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128
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129 void drawKnob(SDL_Surface* screen,Knob k) {
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130 drawCircle(screen,k.p.x*screen->w,k.p.y*screen->h,k.r*screen->w,0xFFFFFF);
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131 drawCircle(screen,(k.p.x+k.r/2*cosf(k.ang))*screen->w,
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132 (k.p.y+k.r/2*sinf(k.ang))*screen->h,k.r/4*screen->w,0);
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133 }
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134
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135 void DrawScreen(SDL_Surface* screen)
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136 {
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137 int x, y, i;
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138 if(SDL_MUSTLOCK(screen))
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139 {
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140 if(SDL_LockSurface(screen) < 0) return;
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141 }
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142 for(y = 0;y < screen->h;y++)
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143 for(x = 0;x < screen->w;x++)
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144 setpix(screen,(float)x,(float)y,((x%255)<<16) + ((y%255)<<8) + (x+y)%255);
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145
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146 //draw Touch History
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147 for(i = SDL_max(0,eventWrite - EVENT_BUF_SIZE);i < eventWrite;i++) {
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148 SDL_Event event = events[i&(EVENT_BUF_SIZE-1)];
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149 int age = eventWrite - i - 1;
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150 float x, y;
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151 unsigned int c, col;
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152
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153 if(event.type == SDL_FINGERMOTION ||
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154 event.type == SDL_FINGERDOWN ||
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155 event.type == SDL_FINGERUP) {
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156 SDL_Touch* inTouch = SDL_GetTouch(event.tfinger.touchId);
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157 if(inTouch == NULL) continue;
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158
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159 x = ((float)event.tfinger.x)/inTouch->xres;
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160 y = ((float)event.tfinger.y)/inTouch->yres;
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161
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162 //draw the touch:
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163 c = colors[event.tfinger.touchId%7];
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164 col =
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165 ((unsigned int)(c*(.1+.85))) |
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166 ((unsigned int)((0xFF*(1-((float)age)/EVENT_BUF_SIZE))) & 0xFF)<<24;
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167
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168 if(event.type == SDL_FINGERMOTION)
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169 drawCircle(screen,x*screen->w,y*screen->h,5,col);
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170 else if(event.type == SDL_FINGERDOWN)
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171 drawCircle(screen,x*screen->w,y*screen->h,-10,col);
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172 }
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173 }
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174
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175 if(knob.p.x > 0)
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176 drawKnob(screen,knob);
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177
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178 if(SDL_MUSTLOCK(screen)) SDL_UnlockSurface(screen);
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179 SDL_Flip(screen);
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180 }
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181
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182 SDL_Surface* initScreen(int width,int height)
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183 {
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184 return SDL_SetVideoMode(width, height, DEPTH,
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185 SDL_HWSURFACE | SDL_RESIZABLE);
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186 }
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187
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188 int main(int argc, char* argv[])
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189 {
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190 SDL_Surface *screen;
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191 SDL_Event event;
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192 SDL_bool quitting = SDL_FALSE;
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193 SDL_RWops *src;
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194
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195 //gesture variables
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196 knob.r = .1f;
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197 knob.ang = 0;
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198
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199 if (SDL_Init(SDL_INIT_VIDEO) < 0 ) return 1;
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200
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201 if (!(screen = initScreen(WIDTH,HEIGHT)))
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202 {
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203 SDL_Quit();
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204 return 1;
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205 }
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206
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207 while(!quitting) {
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208 while(SDL_PollEvent(&event))
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209 {
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210 //Record _all_ events
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211 events[eventWrite & (EVENT_BUF_SIZE-1)] = event;
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212 eventWrite++;
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213
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diff changeset
214 switch (event.type)
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215 {
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216 case SDL_QUIT:
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217 quitting = SDL_TRUE;
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218 break;
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219 case SDL_KEYDOWN:
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220 switch (event.key.keysym.sym)
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221 {
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222 case SDLK_SPACE:
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223 SDL_RecordGesture(-1);
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diff changeset
224 break;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
225 case SDLK_s:
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
diff changeset
226 src = SDL_RWFromFile("gestureSave","w");
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
diff changeset
227 printf("Wrote %i templates\n",SDL_SaveAllDollarTemplates(src));
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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diff changeset
228 SDL_RWclose(src);
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
diff changeset
229 break;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
230 case SDLK_l:
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
diff changeset
231 src = SDL_RWFromFile("gestureSave","r");
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
diff changeset
232 printf("Loaded: %i\n",SDL_LoadDollarTemplates(-1,src));
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
diff changeset
233 SDL_RWclose(src);
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
diff changeset
234 break;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
235 case SDLK_ESCAPE:
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
diff changeset
236 quitting = SDL_TRUE;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
diff changeset
237 break;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
diff changeset
238 }
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
239 break;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
240 case SDL_VIDEORESIZE:
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
diff changeset
241 if (!(screen = initScreen(event.resize.w,
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
diff changeset
242 event.resize.h)))
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
243 {
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
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parents:
diff changeset
244 SDL_Quit();
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
245 return 1;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
246 }
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
247 break;
4918
f5f70fed2c4c Added a Visual Studio project for testgesture
Sam Lantinga <slouken@libsdl.org>
parents: 4689
diff changeset
248 case SDL_FINGERMOTION:
4689
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
249 #if VERBOSE
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
250 printf("Finger: %i,x: %i, y: %i\n",event.tfinger.fingerId,
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
251 event.tfinger.x,event.tfinger.y);
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
252 #endif
4918
f5f70fed2c4c Added a Visual Studio project for testgesture
Sam Lantinga <slouken@libsdl.org>
parents: 4689
diff changeset
253 {
f5f70fed2c4c Added a Visual Studio project for testgesture
Sam Lantinga <slouken@libsdl.org>
parents: 4689
diff changeset
254 SDL_Touch* inTouch = SDL_GetTouch(event.tfinger.touchId);
f5f70fed2c4c Added a Visual Studio project for testgesture
Sam Lantinga <slouken@libsdl.org>
parents: 4689
diff changeset
255 SDL_Finger* inFinger = SDL_GetFinger(inTouch,event.tfinger.fingerId);
f5f70fed2c4c Added a Visual Studio project for testgesture
Sam Lantinga <slouken@libsdl.org>
parents: 4689
diff changeset
256 }
4689
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
257 break;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
258 case SDL_FINGERDOWN:
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
259 #if VERBOSE
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
260 printf("Finger: %"PRIs64" down - x: %i, y: %i\n",
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
261 event.tfinger.fingerId,event.tfinger.x,event.tfinger.y);
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
262 #endif
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
263 break;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
264 case SDL_FINGERUP:
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
265 #if VERBOSE
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
266 printf("Finger: %"PRIs64" up - x: %i, y: %i\n",
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
267 event.tfinger.fingerId,event.tfinger.x,event.tfinger.y);
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
268 #endif
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
269 break;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
270 case SDL_MULTIGESTURE:
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
271 #if VERBOSE
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
272 printf("Multi Gesture: x = %f, y = %f, dAng = %f, dR = %f\n",
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
273 event.mgesture.x,
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
274 event.mgesture.y,
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
275 event.mgesture.dTheta,
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
276 event.mgesture.dDist);
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
277 printf("MG: numDownTouch = %i\n",event.mgesture.numFingers);
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
278 #endif
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
279 knob.p.x = event.mgesture.x;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
280 knob.p.y = event.mgesture.y;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
281 knob.ang += event.mgesture.dTheta;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
282 knob.r += event.mgesture.dDist;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
283 break;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
284 case SDL_DOLLARGESTURE:
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
285 printf("Gesture %"PRIs64" performed, error: %f\n",
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
286 event.dgesture.gestureId,
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
287 event.dgesture.error);
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
288 break;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
289 case SDL_DOLLARRECORD:
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
290 printf("Recorded gesture: %"PRIs64"\n",event.dgesture.gestureId);
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
291 break;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
292 }
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
293 }
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
294 DrawScreen(screen);
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
295 }
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
296 SDL_Quit();
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
297 return 0;
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
298 }
f9ab8df6d45a Added README.touch and README.gesture. Moved touchtest/gestureSDLTest to test/testgesture
Jim Grandpre <jim.tla@gmail.com>
parents:
diff changeset
299