add events manager

2 files changed, 220 insertions, 0 deletions

diff --git a/src/window/EventsManager.cpp b/src/window/EventsManager.cpp
new file mode 100644
index 0000000..ddf2901
--- /dev/null
+++ b/src/window/EventsManager.cpp
@@ -0,0 +1,127 @@
+#include <stdio.h>
+#include <GLFW/glfw3.h>
+
+#include "Window.hpp"
+#include "EventsManager.hpp"
+#include "Events.hpp"
+
+struct lStorage EventsManager::listeners(2);
+
+void EventsManager::PollEvents()
+{
+	int max = listeners.max_n, i;
+	for(i = 0; i < max; i++) {
+		if(!listeners.list[i])
+			continue;
+
+		listeners.list[i]->NextFrame();
+	}
+	glfwPollEvents();
+}
+
+void EventsManager::AddListener(Events *e, int listen)
+{
+	if(listen <= 0)
+		return;
+
+	GLFWwindow *win = e->GetWindow()->GetWin();
+	if(listen & EM_LISTEN_KEY)
+		glfwSetKeyCallback(win, key_callback);
+	if(listen & EM_LISTEN_CURSOR)
+		glfwSetCursorPosCallback(win, cursor_pos_callback);
+	if(listen & EM_LISTEN_MBUTTON)
+		glfwSetMouseButtonCallback(win, mouse_button_callback);
+	if(listen & EM_LISTEN_WINDOWSIZE)
+		glfwSetWindowSizeCallback(win, window_size_callback);
+	if(listen & EM_LISTEN_MSCROLL)
+		glfwSetScrollCallback(win, scroll_callback);
+
+	listeners.Add(e, win, listen);
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+void EventsManager::key_callback(GLFWwindow *window, int key, int scancode,
+	int action, int mode)
+{
+	int max = listeners.max_n, i;
+	for(i = 0; i < max; i++) {
+		if(!listeners.list[i])
+			continue;
+		if(!(listeners.listen_events[i] & EM_LISTEN_KEY))
+			continue;
+		if(listeners.win[i] != window)
+			continue;
+
+		//fprintf(stderr, "key_callback\n");
+		listeners.list[i]->KeyHandle(key, scancode, action, mode);
+	}
+}
+
+void EventsManager::cursor_pos_callback(GLFWwindow *window, double xpos,
+	double ypos)
+{
+	int max = listeners.max_n, i;
+	for(i = 0; i < max; i++) {
+		if(!listeners.list[i])
+			continue;
+		if(!(listeners.listen_events[i] & EM_LISTEN_CURSOR))
+			continue;
+		if(listeners.win[i] != window)
+			continue;
+
+		//fprintf(stderr, "cursor_pos_callback\n");
+		listeners.list[i]->CursorPosHandle(xpos, ypos);
+	}
+}
+
+void EventsManager::mouse_button_callback(GLFWwindow *window, int button,
+	int action, int mode)
+{
+	int max = listeners.max_n, i;
+	for(i = 0; i < max; i++) {
+		if(!listeners.list[i])
+			continue;
+		if(!(listeners.listen_events[i] & EM_LISTEN_MBUTTON))
+			continue;
+		if(listeners.win[i] != window)
+			continue;
+
+		//fprintf(stderr, "mouse_button_callback\n");
+		listeners.list[i]->MouseButtonHandle(button, action, mode);
+	}
+}
+
+void EventsManager::window_size_callback(GLFWwindow* window,
+	int width, int height)
+{
+	int max = listeners.max_n, i;
+	for(i = 0; i < max; i++) {
+		if(!listeners.list[i])
+			continue;
+		if(!(listeners.listen_events[i] & EM_LISTEN_WINDOWSIZE))
+			continue;
+		if(listeners.win[i] != window)
+			continue;
+
+		//fprintf(stderr, "window_size_callback\n");
+		listeners.list[i]->WindowResizeHandle(width, height);
+	}
+}
+
+void EventsManager::scroll_callback(GLFWwindow* window,
+	double xoffset, double yoffset)
+{
+	int max = listeners.max_n, i;
+	for(i = 0; i < max; i++) {
+		if(!listeners.list[i])
+			continue;
+		if(!(listeners.listen_events[i] & EM_LISTEN_MSCROLL))
+			continue;
+		if(listeners.win[i] != window)
+			continue;
+
+		//fprintf(stderr, "scroll_callback\n");
+		listeners.list[i]->MouseScrollHandle(xoffset, yoffset);
+	}
+}
diff --git a/src/window/EventsManager.hpp b/src/window/EventsManager.hpp
new file mode 100644
index 0000000..29a4524
--- /dev/null
+++ b/src/window/EventsManager.hpp
@@ -0,0 +1,93 @@
+#ifndef ENGINE_EVENTSMANAGER_H
+#define ENGINE_EVENTSMANAGER_H
+
+class Events;
+
+enum em_listen {
+	EM_LISTEN_KEY = 1,
+	EM_LISTEN_CURSOR = 2,
+	EM_LISTEN_MBUTTON = 4,
+	EM_LISTEN_WINDOWSIZE = 8,
+	EM_LISTEN_MSCROLL = 16
+};
+
+struct lStorage {
+	Events **list;
+	GLFWwindow **win;
+	int *listen_events;
+	int max_n;
+		
+	lStorage(int n) : max_n(n)
+	{
+		int i;
+		list = new Events*[n];
+		win = new GLFWwindow*[n];
+		listen_events = new int[n];
+		for(i = 0; i < n; i++) {
+			list[i] = 0;
+			win[i] = 0;
+			listen_events[i] = 0;
+		}
+	}
+
+	~lStorage()
+	{
+		delete[] list;
+		delete[] win;
+		delete[] listen_events;
+	}
+
+	void Add(Events *e, GLFWwindow *w, int listen)
+	{
+		int i;
+		for(i = 0; i < max_n; i++) {
+			if(list[i] == 0) {
+				list[i] = e;
+				win[i] = w;
+				listen_events[i] = listen;
+				break;
+			}
+		}
+
+		// realloc memory:
+		Events **tmp_list = list;
+		GLFWwindow **tmp_win = win;
+		int *tmp_levents = listen_events;
+
+		list = new Events*[max_n + 1];
+		win = new GLFWwindow*[max_n + 1];
+		listen_events = new int[max_n + 1];
+
+		for(i = 0; i < max_n; i++) {
+			list[i] = tmp_list[i];
+			win[i] = tmp_win[i];
+			listen_events[i] = tmp_levents[i];
+		}
+		list[max_n] = e;
+		win[max_n] = w;
+		tmp_levents[max_n] = listen;
+
+		delete[] tmp_list;
+		delete[] tmp_win;
+		delete[] tmp_levents;
+	}
+};
+
+class EventsManager {
+	static struct lStorage listeners;
+
+public:
+	static void PollEvents();
+	static void AddListener(Events *e, int listen);
+
+private:
+	EventsManager() { }
+
+	static void key_callback(GLFWwindow *window, int key, int scancode, int action, int mode);
+	static void cursor_pos_callback(GLFWwindow *window, double xpos, double ypos);
+	static void mouse_button_callback(GLFWwindow *window, int button, int action, int mode);
+	static void window_size_callback(GLFWwindow *window, int width, int height);
+	static void scroll_callback(GLFWwindow* window, double xoffset, double yoffset);
+};
+
+#endif /* ENGINE_EVENTSMANAGER_H */