kc3-lang/SDL/test/testhittesting.c

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• Hash : b88ca1b4
  Author :
  Date : 2015-02-10T16:28:56
  

  the last parameter of XChangeProperty is the number of elements.. and when the element format is 32.. the element is "long" so we have 5 long elements here.
  
  Yes this seems confusing as on mac+linux Long is either 32 or 64bits depending on the architecture, but this is how the X11 protocol is defined. Thus 5 is the correct value for the nelts here.  Not 5 or 10 depending on the architecture.
  
  More info on the confusion https://bugs.freedesktop.org/show_bug.cgi?id=16802
  

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• test/testhittesting.c

• #include <stdio.h>
  #include "SDL.h"
  
  /* !!! FIXME: rewrite this to be wired in to test framework. */
  
  #define RESIZE_BORDER 20
  
  const SDL_Rect drag_areas[] = {
      { 20, 20, 100, 100 },
      { 200, 70, 100, 100 },
      { 400, 90, 100, 100 }
  };
  
  static const SDL_Rect *areas = drag_areas;
  static int numareas = SDL_arraysize(drag_areas);
  
  static SDL_HitTestResult
  hitTest(SDL_Window *window, const SDL_Point *pt, void *data)
  {
      int i;
      int w, h;
  
      for (i = 0; i < numareas; i++) {
          if (SDL_PointInRect(pt, &areas[i])) {
              SDL_Log("HIT-TEST: DRAGGABLE\n");
              return SDL_HITTEST_DRAGGABLE;
          }
      }
  
      SDL_GetWindowSize(window, &w, &h);
  
      #define REPORT_RESIZE_HIT(name) { \
          SDL_Log("HIT-TEST: RESIZE_" #name "\n"); \
          return SDL_HITTEST_RESIZE_##name; \
      }
  
      if (pt->x < RESIZE_BORDER && pt->y < RESIZE_BORDER) {
          REPORT_RESIZE_HIT(TOPLEFT);
      } else if (pt->x > RESIZE_BORDER && pt->x < w - RESIZE_BORDER && pt->y < RESIZE_BORDER) {
          REPORT_RESIZE_HIT(TOP);
      } else if (pt->x > w - RESIZE_BORDER && pt->y < RESIZE_BORDER) {
          REPORT_RESIZE_HIT(TOPRIGHT);
      } else if (pt->x > w - RESIZE_BORDER && pt->y > RESIZE_BORDER && pt->y < h - RESIZE_BORDER) {
          REPORT_RESIZE_HIT(RIGHT);
      } else if (pt->x > w - RESIZE_BORDER && pt->y > h - RESIZE_BORDER) {
          REPORT_RESIZE_HIT(BOTTOMRIGHT);
      } else if (pt->x < w - RESIZE_BORDER && pt->x > RESIZE_BORDER && pt->y > h - RESIZE_BORDER) {
          REPORT_RESIZE_HIT(BOTTOM);
      } else if (pt->x < RESIZE_BORDER && pt->y > h - RESIZE_BORDER) {
          REPORT_RESIZE_HIT(BOTTOMLEFT);
      } else if (pt->x < RESIZE_BORDER && pt->y < h - RESIZE_BORDER && pt->y > RESIZE_BORDER) {
          REPORT_RESIZE_HIT(LEFT);
      }
  
      SDL_Log("HIT-TEST: NORMAL\n");
      return SDL_HITTEST_NORMAL;
  }
  
  
  int main(int argc, char **argv)
  {
      int done = 0;
      SDL_Window *window;
      SDL_Renderer *renderer;
  
      /* !!! FIXME: check for errors. */
      SDL_Init(SDL_INIT_VIDEO);
      window = SDL_CreateWindow("Drag the red boxes", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 640, 480, SDL_WINDOW_BORDERLESS | SDL_WINDOW_RESIZABLE);
      renderer = SDL_CreateRenderer(window, -1, 0);
  
      if (SDL_SetWindowHitTest(window, hitTest, NULL) == -1) {
          SDL_Log("Enabling hit-testing failed!\n");
          SDL_Quit();
          return 1;
      }
  
      while (!done)
      {
          SDL_Event e;
          int nothing_to_do = 1;
  
          SDL_SetRenderDrawColor(renderer, 0, 0, 127, 255);
          SDL_RenderClear(renderer);
          SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
          SDL_RenderFillRects(renderer, areas, SDL_arraysize(drag_areas));
          SDL_RenderPresent(renderer);
  
          while (SDL_PollEvent(&e)) {
              nothing_to_do = 0;
  
              switch (e.type)
              {
                  case SDL_MOUSEBUTTONDOWN:
                      SDL_Log("button down!\n");
                      break;
  
                  case SDL_MOUSEBUTTONUP:
                      SDL_Log("button up!\n");
                      break;
  
                  case SDL_WINDOWEVENT:
                      if (e.window.event == SDL_WINDOWEVENT_MOVED) {
                          SDL_Log("Window event moved to (%d, %d)!\n", (int) e.window.data1, (int) e.window.data2);
                      }
                      break;
  
                  case SDL_KEYDOWN:
                      if (e.key.keysym.sym == SDLK_ESCAPE) {
                          done = 1;
                      } else if (e.key.keysym.sym == SDLK_x) {
                          if (!areas) {
                              areas = drag_areas;
                              numareas = SDL_arraysize(drag_areas);
                          } else {
                              areas = NULL;
                              numareas = 0;
                          }
                      }
                      break;
  
                  case SDL_QUIT:
                      done = 1;
                      break;
              }
          }
  
          if (nothing_to_do) {
              SDL_Delay(50);
          }
      }
  
      SDL_Quit();
      return 0;
  }
  

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