test/testhittesting.c
author Sam Lantinga <slouken@libsdl.org>
Wed, 03 Oct 2018 15:48:26 -0700
changeset 12285 30c3ffcbed38
parent 11272 d60ede5a0c2e
permissions -rw-r--r--
Update documentation to note that this hint works on Android too (thanks Trent!)
     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 
    17 static SDL_HitTestResult SDLCALL
    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;
    63     SDL_Window *window;
    64     SDL_Renderer *renderer;
    65 
    66     /* !!! FIXME: check for errors. */
    67     SDL_Init(SDL_INIT_VIDEO);
    68     window = SDL_CreateWindow("Drag the red boxes", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 640, 480, SDL_WINDOW_BORDERLESS | SDL_WINDOW_RESIZABLE);
    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             {
    93                 case SDL_MOUSEBUTTONDOWN:
    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:
   102                     if (e.window.event == SDL_WINDOWEVENT_MOVED) {
   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 }