Atlas - testhittesting.c
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1/*
2  Copyright (C) 1997-2025 Sam Lantinga <[email protected]>
3
4  This software is provided 'as-is', without any express or implied
5  warranty.  In no event will the authors be held liable for any damages
6  arising from the use of this software.
7
8  Permission is granted to anyone to use this software for any purpose,
9  including commercial applications, and to alter it and redistribute it
10  freely.
11*/
12#include <SDL3/SDL.h>
13#include <SDL3/SDL_main.h>
14#include <SDL3/SDL_test.h>
15
16#define RESIZE_BORDER 20
17
18static const SDL_Rect drag_areas[] = {
19    { 20, 20, 100, 100 },
20    { 200, 70, 100, 100 },
21    { 400, 90, 100, 100 }
22};
23static const SDL_FRect render_areas[] = {
24    { 20.0f, 20.0f, 100.0f, 100.0f },
25    { 200.0f, 70.0f, 100.0f, 100.0f },
26    { 400.0f, 90.0f, 100.0f, 100.0f }
27};
28
29static const SDL_Rect *areas = drag_areas;
30static int numareas = SDL_arraysize(drag_areas);
31
32static SDL_HitTestResult SDLCALL
33hitTest(SDL_Window *window, const SDL_Point *pt, void *data)
34{
35    int i;
36    int w, h, p_w;
37    SDL_Point adj_pt;
38    float scale;
39
40    SDL_GetWindowSize(window, &w, &h);
41    SDL_GetWindowSizeInPixels(window, &p_w, NULL);
42
43    scale = (float)p_w / (float)w;
44
45    adj_pt.x = (int)SDL_floorf(pt->x * scale);
46    adj_pt.y = (int)SDL_floorf(pt->y * scale);
47
48    for (i = 0; i < numareas; i++) {
49        if (SDL_PointInRect(&adj_pt, &areas[i])) {
50            SDL_Log("HIT-TEST: DRAGGABLE");
51            return SDL_HITTEST_DRAGGABLE;
52        }
53    }
54
55#define REPORT_RESIZE_HIT(name)                  \
56    {                                            \
57        SDL_Log("HIT-TEST: RESIZE_" #name ""); \
58        return SDL_HITTEST_RESIZE_##name;        \
59    }
60
61    if (pt->x < RESIZE_BORDER && pt->y < RESIZE_BORDER) {
62        REPORT_RESIZE_HIT(TOPLEFT);
63    } else if (pt->x > RESIZE_BORDER && pt->x < w - RESIZE_BORDER && pt->y < RESIZE_BORDER) {
64        REPORT_RESIZE_HIT(TOP);
65    } else if (pt->x > w - RESIZE_BORDER && pt->y < RESIZE_BORDER) {
66        REPORT_RESIZE_HIT(TOPRIGHT);
67    } else if (pt->x > w - RESIZE_BORDER && pt->y > RESIZE_BORDER && pt->y < h - RESIZE_BORDER) {
68        REPORT_RESIZE_HIT(RIGHT);
69    } else if (pt->x > w - RESIZE_BORDER && pt->y > h - RESIZE_BORDER) {
70        REPORT_RESIZE_HIT(BOTTOMRIGHT);
71    } else if (pt->x < w - RESIZE_BORDER && pt->x > RESIZE_BORDER && pt->y > h - RESIZE_BORDER) {
72        REPORT_RESIZE_HIT(BOTTOM);
73    } else if (pt->x < RESIZE_BORDER && pt->y > h - RESIZE_BORDER) {
74        REPORT_RESIZE_HIT(BOTTOMLEFT);
75    } else if (pt->x < RESIZE_BORDER && pt->y < h - RESIZE_BORDER && pt->y > RESIZE_BORDER) {
76        REPORT_RESIZE_HIT(LEFT);
77    }
78
79    SDL_Log("HIT-TEST: NORMAL");
80    return SDL_HITTEST_NORMAL;
81}
82
83int main(int argc, char **argv)
84{
85    int i;
86    int done = 0;
87    SDLTest_CommonState *state;
88
89    /* Initialize test framework */
90    state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
91    if (!state) {
92        return 1;
93    }
94
95    state->window_flags = SDL_WINDOW_BORDERLESS | SDL_WINDOW_RESIZABLE;
96
97    /* Parse commandline */
98    if (!SDLTest_CommonDefaultArgs(state, argc, argv)) {
99        return 1;
100    }
101
102    if (!SDLTest_CommonInit(state)) {
103        return 2;
104    }
105
106    for (i = 0; i < state->num_windows; i++) {
107        if (!SDL_SetWindowHitTest(state->windows[i], hitTest, NULL)) {
108            SDL_Log("Enabling hit-testing failed for window %d: %s", i, SDL_GetError());
109            SDL_Quit();
110            return 1;
111        }
112    }
113
114    while (!done) {
115        SDL_Event e;
116        int nothing_to_do = 1;
117
118        for (i = 0; i < state->num_windows; ++i) {
119            SDL_SetRenderDrawColor(state->renderers[i], 0, 0, 127, 255);
120            SDL_RenderClear(state->renderers[i]);
121            SDL_SetRenderDrawColor(state->renderers[i], 255, 0, 0, 255);
122            SDLTest_DrawString(state->renderers[i], (float)state->window_w / 2 - 80.0f, 10.0f, "Drag the red boxes");
123            SDL_RenderFillRects(state->renderers[i], render_areas, SDL_arraysize(render_areas));
124            SDL_RenderPresent(state->renderers[i]);
125        }
126
127        while (SDL_PollEvent(&e)) {
128            SDLTest_CommonEvent(state, &e, &done);
129            nothing_to_do = 0;
130
131            switch (e.type) {
132            case SDL_EVENT_MOUSE_BUTTON_DOWN:
133                SDL_Log("button down!");
134                break;
135
136            case SDL_EVENT_MOUSE_BUTTON_UP:
137                SDL_Log("button up!");
138                break;
139
140            case SDL_EVENT_WINDOW_MOVED:
141                SDL_Log("Window event moved to (%d, %d)!", (int)e.window.data1, (int)e.window.data2);
142                break;
143
144            case SDL_EVENT_KEY_DOWN:
145                if (e.key.key == SDLK_ESCAPE) {
146                    done = 1;
147                } else if (e.key.key == SDLK_X) {
148                    if (!areas) {
149                        areas = drag_areas;
150                        numareas = SDL_arraysize(drag_areas);
151                    } else {
152                        areas = NULL;
153                        numareas = 0;
154                    }
155                }
156                break;
157
158            case SDL_EVENT_QUIT:
159                done = 1;
160                break;
161            default:
162                break;
163            }
164        }
165
166        if (nothing_to_do) {
167            SDL_Delay(50);
168        }
169    }
170
171    SDLTest_CommonQuit(state);
172    return 0;
173}
174
[FILE END]
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