Add drop_area_t

include/drop_area.h

@@ -0,0 +1,17 @@
+#ifndef DROP_AREA_H
+#define DROP_AREA_H
+
+#include "colour.h"
+#include "window.h"
+#include <stdbool.h>
+
+typedef struct {
+  render_rect_t rect;
+  colour_t border_colour;
+  bool mouseover;
+} drop_area_t;
+
+void init_drop_area(window_t *wnd, drop_area_t *area, render_rect_t rect,
+                    colour_t border_colour);
+
+#endif // !DROP_AREA_H

src/drop_area.c

@@ -0,0 +1,54 @@
+#include "drop_area.h"
+#include "SDL_events.h"
+#include "colour.h"
+#include "window.h"
+#include <stdio.h>
+
+void handle_hover(const window_t *wnd, void *obj, const SDL_Event *ev);
+void handle_drop_file(const window_t *wnd, void *obj, const SDL_Event *ev);
+void render_drop_area(const window_t *wnd, void *obj);
+
+void init_drop_area(window_t *wnd, drop_area_t *area, render_rect_t rect,
+                    colour_t border_colour) {
+  area->rect = rect;
+  area->border_colour = border_colour;
+  area->mouseover = false;
+
+  add_event_listener(wnd, area, handle_hover);
+  add_event_listener(wnd, area, handle_drop_file);
+  add_renderer_func(wnd, area, render_drop_area);
+}
+
+void handle_hover(const window_t *wnd, void *obj, const SDL_Event *ev) {
+  if (!obj || ev->type != SDL_MOUSEMOTION) {
+    return;
+  }
+
+  drop_area_t *area = (drop_area_t *)obj;
+
+  area->mouseover = aabb(ev->motion.x, ev->motion.y, &(area->rect));
+}
+
+void handle_drop_file(const window_t *wnd, void *obj, const SDL_Event *ev) {
+  if (!obj || ev->type != SDL_DROPFILE) {
+    return;
+  }
+
+  drop_area_t *area = (drop_area_t *)obj;
+
+  if (!(area->mouseover)) {
+    return;
+  }
+
+  printf("%s\n", ev->drop.file);
+}
+
+void render_drop_area(const window_t *wnd, void *obj) {
+  if (!obj) {
+    return;
+  }
+
+  drop_area_t *area = (drop_area_t *)obj;
+
+  draw_rect(wnd, &(area->rect), area->border_colour);
+}