ComputerGraphicsStart/Window.cpp at master · charlescookey/ComputerGraphicsStart · GitHub

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#include "Window.h"

#include <memory>

Window* window;

#define WINDOW_GET_X_LPARAM(lp) ((int)(short)LOWORD(lp))
#define WINDOW_GET_Y_LPARAM(lp) ((int)(short)HIWORD(lp))

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) {
	switch (msg)
	{
	case WM_DESTROY:
	{
		PostQuitMessage(0);
		exit(0);
		return 0;
	}
	case WM_CLOSE:
	{
		PostQuitMessage(0);
		exit(0);
		return 0;
	}
	case WM_KEYDOWN:
	{
		window->keys[(unsigned int)wParam] = true;
		return 0;
	}
	case WM_KEYUP:
	{
		window->keys[(unsigned int)wParam] = false;
		return 0;
	}
	case WM_LBUTTONDOWN:
	{
		window->updateMouse(WINDOW_GET_X_LPARAM(lParam), WINDOW_GET_Y_LPARAM(lParam));
		window->mouseButtons[0] = true;
		return 0;
	}
	case WM_LBUTTONUP:
	{
		window->updateMouse(WINDOW_GET_X_LPARAM(lParam), WINDOW_GET_Y_LPARAM(lParam));
		window->mouseButtons[0] = false;
		return 0;
	}
	case WM_MOUSEMOVE:
	{
		window->updateMouse(WINDOW_GET_X_LPARAM(lParam), WINDOW_GET_Y_LPARAM(lParam));
		return 0;
	}
	case WM_SETFOCUS:
	{
		ShowCursor(false);
		break;
	}
	case WM_KILLFOCUS:
	{
		ShowCursor(true);
		break;
	}
	default:
	{
		return DefWindowProc(hwnd, msg, wParam, lParam);
	}
	}

};


void Window::init(const std::string window_name , int window_width , int window_height  ) {

	width = window_width;
	height = window_height;
	style = WS_OVERLAPPEDWINDOW | WS_VISIBLE;


	WNDCLASSEX wc;
	hinstance = GetModuleHandle(NULL);
	name = window_name;
	wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
	wc.lpfnWndProc = WndProc;
	wc.cbClsExtra = 0;
	wc.cbWndExtra = 0;
	wc.hInstance = hinstance;
	wc.hIcon = LoadIcon(NULL, IDI_WINLOGO);
	wc.hIconSm = wc.hIcon;
	wc.hCursor = LoadCursor(NULL, IDC_ARROW);
	wc.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
	wc.lpszMenuName = NULL;
	std::wstring wname = std::wstring(name.begin(), name.end());
	wc.lpszClassName = wname.c_str();
	wc.cbSize = sizeof(WNDCLASSEX);
	RegisterClassEx(&wc);


	hwnd = CreateWindowEx(WS_EX_APPWINDOW, wname.c_str(), wname.c_str(), style, 0, 0, width, height, NULL, NULL, hinstance, this);
	//hwnd = CreateWindowEx(WS_EX_APPWINDOW, wname.c_str(), wname.c_str(), style, window_x, window_y, width, height, NULL, NULL, hinstance, this);

	memset(keys, 0, 256 * sizeof(char));
	window = this;


}

void Window::processMessages() {
	MSG msg;
	ZeroMemory(&msg, sizeof(MSG));
	while(PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
}

// Checks if a specific key is currently pressed
bool Window::keyPressed(int key)
{
	return keys[key];
}