testhittesting.c File Reference

#include <stdio.h>
#include "SDL.h"

Include dependency graph for testhittesting.c:

Go to the source code of this file.

Macros
#define	RESIZE_BORDER   20
#define	REPORT_RESIZE_HIT(name)

Functions
static SDL_HitTestResult	hitTest (SDL_Window *window, const SDL_Point *pt, void *data)
int	main (int argc, char **argv)

Variables
const SDL_Rect	drag_areas []
static const SDL_Rect *	areas = drag_areas
static int	numareas = SDL_arraysize(drag_areas)

Macro Definition Documentation

REPORT_RESIZE_HIT

#define REPORT_RESIZE_HIT

(

name

)

Value:

        { \
        SDL_Log("HIT-TEST: RESIZE_" #name "\n"); \
        return SDL_HITTEST_RESIZE_##name; \
    }

RESIZE_BORDER

#define RESIZE_BORDER   20

Definition at line 6 of file testhittesting.c.

Function Documentation

hitTest()

static SDL_HitTestResult hitTest ( SDL_Window *  window, const SDL_Point *  pt, void *  data  )

static

Definition at line 18 of file testhittesting.c.

{
    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;
}

References areas, i, numareas, REPORT_RESIZE_HIT, RESIZE_BORDER, SDL_GetWindowSize, SDL_HITTEST_DRAGGABLE, SDL_HITTEST_NORMAL, SDL_Log, SDL_PointInRect(), SDL_Point::x, and SDL_Point::y.

Referenced by main().

main()

int main	(	int	argc,
		char **	argv
	)

Definition at line 60 of file testhittesting.c.

{
    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;
}

References areas, done, drag_areas, e, hitTest(), NULL, numareas, renderer, SDL_arraysize, SDL_CreateRenderer, SDL_CreateWindow, SDL_Delay, SDL_Init, SDL_INIT_VIDEO, SDL_KEYDOWN, SDL_Log, SDL_MOUSEBUTTONDOWN, SDL_MOUSEBUTTONUP, SDL_PollEvent, SDL_Quit, SDL_QUIT, SDL_RenderClear, SDL_RenderFillRects, SDL_RenderPresent, SDL_SetRenderDrawColor, SDL_SetWindowHitTest, SDL_WINDOW_BORDERLESS, SDL_WINDOW_RESIZABLE, SDL_WINDOWEVENT, SDL_WINDOWEVENT_MOVED, SDL_WINDOWPOS_CENTERED, SDLK_ESCAPE, and SDLK_x.

Variable Documentation

areas

const SDL_Rect* areas = drag_areas

static

Definition at line 14 of file testhittesting.c.

Referenced by hitTest(), and main().

drag_areas

const SDL_Rect drag_areas[]

Initial value:

= {
    { 20, 20, 100, 100 },
    { 200, 70, 100, 100 },
    { 400, 90, 100, 100 }
}

Definition at line 8 of file testhittesting.c.

Referenced by main().

numareas

int numareas = SDL_arraysize(drag_areas)

static

Definition at line 15 of file testhittesting.c.

Referenced by hitTest(), and main().