From 6eec70ec2ad54168442eca4f15030e7e6294cfb7 Mon Sep 17 00:00:00 2001
From: Joursoir <chat@joursoir.net>
Date: Sun, 21 Mar 2021 12:55:31 +0000
Subject: add events subsystem

---
 src/window/Events.cpp | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++
 src/window/Events.hpp | 33 ++++++++++++++++++++
 2 files changed, 118 insertions(+)
 create mode 100644 src/window/Events.cpp
 create mode 100644 src/window/Events.hpp

diff --git a/src/window/Events.cpp b/src/window/Events.cpp
new file mode 100644
index 0000000..09f6acd
--- /dev/null
+++ b/src/window/Events.cpp
@@ -0,0 +1,85 @@
+#include <string.h>
+#include <GL/glew.h>
+#include <GLFW/glfw3.h>
+
+#include "Events.hpp"
+
+Events::Events() : cur_frame(0), delta_x(0.0), delta_y(0.0),
+	x(0.0), y(0.0), cursor_locked(false)
+{
+	keys = new bool[MAX_KEYS];
+	memset(keys, false, MAX_KEYS * sizeof(bool));
+	frames = new unsigned int[MAX_KEYS];
+	memset(frames, 0, MAX_KEYS * sizeof(unsigned int));
+}
+
+Events::~Events()
+{
+	delete[] keys;
+	delete[] frames;
+}
+
+bool Events::Pressed(int keycode)
+{
+	if(keycode < 0 || keycode >= MOUSE_BUTTONS)
+		return false;
+	return keys[keycode];
+}
+
+bool Events::Jpressed(int keycode)
+{
+	if(keycode < 0 || keycode >= MOUSE_BUTTONS)
+		return false;
+	return keys[keycode] && (frames[keycode] == cur_frame);
+}
+
+bool Events::Clicked(int button)
+{
+	return keys[MOUSE_BUTTONS + button];
+}
+
+bool Events::Jclicked(int button)
+{
+	int idx = MOUSE_BUTTONS + button;
+	return keys[idx] && (frames[idx] == cur_frame);
+}
+
+void Events::NextFrame()
+{
+	cur_frame++;
+}
+
+//////////////////////////////////////////////////////////////////////////////
+
+void Events::KeyHandle(int key, int scancode, int action, int mode)
+{
+	if(action == GLFW_PRESS) {
+		keys[key] = true;
+		frames[key] = cur_frame;
+	}
+	else if(action == GLFW_RELEASE) {
+		keys[key] = false;
+		frames[key] = cur_frame;
+	}
+}
+
+void Events::CursorPosHandle(double xpos, double ypos)
+{
+	delta_x = xpos - x;
+	delta_y = ypos - y;
+
+	x = xpos;
+	y = ypos;
+}
+
+void Events::MouseButtonHandle(int button, int action, int mode)
+{
+	if(action == GLFW_PRESS) {
+		keys[MOUSE_BUTTONS + button] = true;
+		frames[MOUSE_BUTTONS + button] = cur_frame;
+	}
+	else if (action == GLFW_RELEASE){
+		keys[MOUSE_BUTTONS + button] = false;
+		frames[MOUSE_BUTTONS + button] = cur_frame;
+	}
+}
diff --git a/src/window/Events.hpp b/src/window/Events.hpp
new file mode 100644
index 0000000..6914dca
--- /dev/null
+++ b/src/window/Events.hpp
@@ -0,0 +1,33 @@
+#ifndef ENGINE_EVENTS_H
+#define ENGINE_EVENTS_H
+
+#define MAX_KEYS GLFW_KEY_LAST + 1 + GLFW_MOUSE_BUTTON_LAST + 1
+#define MOUSE_BUTTONS GLFW_KEY_LAST + 1 /* when start mouse buttons */
+
+class Events {
+	bool *keys;
+	unsigned int *frames;
+	unsigned int cur_frame;
+	bool update_frame;
+	float delta_x;
+	float delta_y;
+	float x;
+	float y;
+	bool cursor_locked;
+	
+public:
+	Events();
+	~Events();
+
+	bool Pressed(int keycode);
+	bool Jpressed(int keycode);
+	bool Clicked(int button);
+	bool Jclicked(int button);
+
+	void NextFrame();
+	void KeyHandle(int key, int scancode, int action, int mode);
+	void CursorPosHandle(double xpos, double ypos);
+	void MouseButtonHandle(int button, int action, int mode);
+};
+
+#endif /* ENGINE_EVENTS_H */
-- 
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