SDL  2.0
testhittesting.c
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1 #include <stdio.h>
2 #include "SDL.h"
3 
4 /* !!! FIXME: rewrite this to be wired in to test framework. */
5 
6 #define RESIZE_BORDER 20
7 
8 const SDL_Rect drag_areas[] = {
9  { 20, 20, 100, 100 },
10  { 200, 70, 100, 100 },
11  { 400, 90, 100, 100 }
12 };
13 
14 static const SDL_Rect *areas = drag_areas;
15 static int numareas = SDL_arraysize(drag_areas);
16 
18 hitTest(SDL_Window *window, const SDL_Point *pt, void *data)
19 {
20  int i;
21  int w, h;
22 
23  for (i = 0; i < numareas; i++) {
24  if (SDL_PointInRect(pt, &areas[i])) {
25  SDL_Log("HIT-TEST: DRAGGABLE\n");
26  return SDL_HITTEST_DRAGGABLE;
27  }
28  }
29 
30  SDL_GetWindowSize(window, &w, &h);
31 
32  #define REPORT_RESIZE_HIT(name) { \
33  SDL_Log("HIT-TEST: RESIZE_" #name "\n"); \
34  return SDL_HITTEST_RESIZE_##name; \
35  }
36 
37  if (pt->x < RESIZE_BORDER && pt->y < RESIZE_BORDER) {
38  REPORT_RESIZE_HIT(TOPLEFT);
39  } else if (pt->x > RESIZE_BORDER && pt->x < w - RESIZE_BORDER && pt->y < RESIZE_BORDER) {
40  REPORT_RESIZE_HIT(TOP);
41  } else if (pt->x > w - RESIZE_BORDER && pt->y < RESIZE_BORDER) {
42  REPORT_RESIZE_HIT(TOPRIGHT);
43  } else if (pt->x > w - RESIZE_BORDER && pt->y > RESIZE_BORDER && pt->y < h - RESIZE_BORDER) {
44  REPORT_RESIZE_HIT(RIGHT);
45  } else if (pt->x > w - RESIZE_BORDER && pt->y > h - RESIZE_BORDER) {
46  REPORT_RESIZE_HIT(BOTTOMRIGHT);
47  } else if (pt->x < w - RESIZE_BORDER && pt->x > RESIZE_BORDER && pt->y > h - RESIZE_BORDER) {
48  REPORT_RESIZE_HIT(BOTTOM);
49  } else if (pt->x < RESIZE_BORDER && pt->y > h - RESIZE_BORDER) {
50  REPORT_RESIZE_HIT(BOTTOMLEFT);
51  } else if (pt->x < RESIZE_BORDER && pt->y < h - RESIZE_BORDER && pt->y > RESIZE_BORDER) {
52  REPORT_RESIZE_HIT(LEFT);
53  }
54 
55  SDL_Log("HIT-TEST: NORMAL\n");
56  return SDL_HITTEST_NORMAL;
57 }
58 
59 
60 int main(int argc, char **argv)
61 {
62  int done = 0;
65 
66  /* !!! FIXME: check for errors. */
69  renderer = SDL_CreateRenderer(window, -1, 0);
70 
71  if (SDL_SetWindowHitTest(window, hitTest, NULL) == -1) {
72  SDL_Log("Enabling hit-testing failed!\n");
73  SDL_Quit();
74  return 1;
75  }
76 
77  while (!done)
78  {
79  SDL_Event e;
80  int nothing_to_do = 1;
81 
82  SDL_SetRenderDrawColor(renderer, 0, 0, 127, 255);
83  SDL_RenderClear(renderer);
84  SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
85  SDL_RenderFillRects(renderer, areas, SDL_arraysize(drag_areas));
86  SDL_RenderPresent(renderer);
87 
88  while (SDL_PollEvent(&e)) {
89  nothing_to_do = 0;
90 
91  switch (e.type)
92  {
94  SDL_Log("button down!\n");
95  break;
96 
97  case SDL_MOUSEBUTTONUP:
98  SDL_Log("button up!\n");
99  break;
100 
101  case SDL_WINDOWEVENT:
103  SDL_Log("Window event moved to (%d, %d)!\n", (int) e.window.data1, (int) e.window.data2);
104  }
105  break;
106 
107  case SDL_KEYDOWN:
108  if (e.key.keysym.sym == SDLK_ESCAPE) {
109  done = 1;
110  } else if (e.key.keysym.sym == SDLK_x) {
111  if (!areas) {
112  areas = drag_areas;
113  numareas = SDL_arraysize(drag_areas);
114  } else {
115  areas = NULL;
116  numareas = 0;
117  }
118  }
119  break;
120 
121  case SDL_QUIT:
122  done = 1;
123  break;
124  }
125  }
126 
127  if (nothing_to_do) {
128  SDL_Delay(50);
129  }
130  }
131 
132  SDL_Quit();
133  return 0;
134 }
#define SDL_WINDOWPOS_CENTERED
Definition: SDL_video.h:139
#define SDL_PollEvent
SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char const char SDL_SCANF_FORMAT_STRING const char return SDL_ThreadFunction const char void return Uint32 return Uint32 SDL_AssertionHandler void SDL_SpinLock SDL_atomic_t int int return SDL_atomic_t return void void void return void return int return SDL_AudioSpec SDL_AudioSpec return int int return return int SDL_RWops int SDL_AudioSpec Uint8 Uint32 * e
static int numareas
GLfloat GLfloat GLfloat GLfloat h
The structure that defines a point.
Definition: SDL_rect.h:48
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
#define SDL_CreateWindow
SDL_FORCE_INLINE SDL_bool SDL_PointInRect(const SDL_Point *p, const SDL_Rect *r)
Returns true if point resides inside a rectangle.
Definition: SDL_rect.h:73
const SDL_Rect drag_areas[]
Definition: testhittesting.c:8
SDL_HitTestResult
Possible return values from the SDL_HitTest callback.
Definition: SDL_video.h:993
SDL_WindowEvent window
Definition: SDL_events.h:529
int x
Definition: SDL_rect.h:50
#define SDL_GetWindowSize
#define SDL_Log
#define SDL_RenderFillRects
int y
Definition: SDL_rect.h:51
static SDL_Renderer * renderer
#define SDL_Quit
int done
Definition: checkkeys.c:28
GLubyte GLubyte GLubyte GLubyte w
SDL_Keysym keysym
Definition: SDL_events.h:199
static SDL_HitTestResult hitTest(SDL_Window *window, const SDL_Point *pt, void *data)
#define SDL_Delay
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:50
#define RESIZE_BORDER
Definition: testhittesting.c:6
#define NULL
Definition: begin_code.h:164
#define REPORT_RESIZE_HIT(name)
#define SDL_RenderClear
EGLSurface EGLNativeWindowType * window
Definition: eglext.h:1025
SDL_KeyboardEvent key
Definition: SDL_events.h:530
#define SDL_SetWindowHitTest
The type used to identify a window.
Definition: SDL_sysvideo.h:73
SDL_Keycode sym
Definition: SDL_keyboard.h:50
#define SDL_Init
#define SDL_arraysize(array)
Definition: SDL_stdinc.h:93
General event structure.
Definition: SDL_events.h:525
#define SDL_SetRenderDrawColor
static const SDL_Rect * areas
int main(int argc, char **argv)
#define SDLCALL
Definition: SDL_internal.h:45
#define SDL_INIT_VIDEO
Definition: SDL.h:78
#define SDL_CreateRenderer
A rectangle, with the origin at the upper left.
Definition: SDL_rect.h:64
#define SDL_RenderPresent
Uint32 type
Definition: SDL_events.h:527