LAB1_summer

#include <windows.h>
#include <stdio.h>
#include <tchar.h>
#include <math.h>
#define MAX_T 5;
#define MAX_X 5;
#define MAX_Y 7;
// Константы идентификаторов командных пунктов меню
enum {
	IDM_AXIS = 0x1000,  	// Рисовать оси координат
	IDM_XT,				// График x(t)
	IDM_YT,				// График y(t)
	IDM_YX,			// График y(x)
	IDM_ABOUT,          	// О программе
	IDM_EXIT            	// Выход
};
LONG WINAPI WndProc(HWND, UINT, WPARAM, LPARAM);
// Функция рисования осей
void DrawAxis(HDC hdc, RECT rectClient)
{
	int OffsetY, OffsetX;
	int height, width;
	HPEN hpen;
	height = rectClient.bottom - rectClient.top;
	width = rectClient.right - rectClient.left;
	hpen = CreatePen(PS_SOLID, 0, 0);
	SelectObject(hdc, hpen);
	OffsetY = (height) >> 1;
	OffsetX = (width) >> 1;
	MoveToEx(hdc, 0, OffsetY, 0);
	LineTo(hdc, width, OffsetY);
	MoveToEx(hdc, OffsetX, 0, 0);
	LineTo(hdc, OffsetX, height);
}
void DrawGraphXT(HDC hdc, RECT rectClient)
{
	//здесь x=t, x=y(t);
	int OffsetX, OffsetY;
	float ScaleX, ScaleY;
	int height, width;
	float x, y;
	int X, Y;
	HPEN hpen;
	height = rectClient.bottom - rectClient.top;
	width = rectClient.right - rectClient.left;
	hpen = CreatePen(PS_SOLID, 2, 0xFF);
	SelectObject(hdc, hpen);
	OffsetY = (height) >> 1;
	OffsetX = (width) >> 1;
	ScaleX = (float)(width >> 1) / MAX_T;
	ScaleY = (float)((height >> 1)) / MAX_X;
	x = 0;
	y = 0;
	X = OffsetX + int(x*ScaleX);
	Y = OffsetY + int(y*ScaleY);
	MoveToEx(hdc, X, Y, 0);
	while (x<7)
	{
		x = x + 0.1f;
		y = 2 * sin(x) + cos(3 * x);
		X = OffsetX + x*ScaleX;
		Y = OffsetY - y*ScaleY;
		LineTo(hdc, X, Y);
	}
}

void DrawGraphYT(HDC hdc, RECT rectClient)
{
	//здесь x=t, y=y(t);
	int OffsetX, OffsetY;
	float ScaleX, ScaleY;
	int height, width;
	float x, y;
	int X, Y;
	HPEN hpen;
	height = rectClient.bottom - rectClient.top;
	width = rectClient.right - rectClient.left;
	hpen = CreatePen(PS_SOLID, 2, 0xFF);
	SelectObject(hdc, hpen);
	OffsetY = (height) >> 1;
	OffsetX = (width) >> 1;
	ScaleX = (float)(width >> 1) / MAX_T;
	ScaleY = (float)((height >> 1)) / MAX_Y;
	x = 0;
	y = 2;
	X = OffsetX + int(x*ScaleX);
	Y = OffsetY - int(y*ScaleY);
	MoveToEx(hdc, X, Y, 0);
	while (x<7)
	{
		x = x + 0.1f;
		y = cos(3 * x) + cos(x);
		X = OffsetX + x*ScaleX;
		Y = OffsetY - y*ScaleY;
		LineTo(hdc, X, Y);
	}
}
void DrawGraphYX(HDC hdc, RECT rectClient)
{
	//здесь x=x(t), y=y(t)
	int OffsetY, OffsetX;
	float ScaleX, ScaleY;
	int height, width;
	float x, y, t;
	int X, Y;
	HPEN hpen;
	height = rectClient.bottom - rectClient.top;
	width = rectClient.right - rectClient.left;
	hpen = CreatePen(PS_SOLID, 2, 0xFF);
	SelectObject(hdc, hpen);
	OffsetY = (height) >> 1;
	OffsetX = (width) >> 1;
	ScaleX = (float)(width >> 1) / MAX_X;
	ScaleY = (float)((height >> 1)) / MAX_Y;
	t = 0;
	x = 1;
	y = 2;
	X = OffsetX + int(x*ScaleX);
	Y = OffsetY - int(y*ScaleY);
	MoveToEx(hdc, X, Y, 0);
	while (t<7)
	{
		t = t + 0.1f;
		y = cos(3 * t) + cos(t);
		x = 2*sin(t) + cos(3 * t);
		X = OffsetX + x*ScaleX;
		Y = OffsetY - y*ScaleY;
		LineTo(hdc, X, Y);
	}
}
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
	HWND hwnd;
	MSG msg;
	WNDCLASS w;
	HMENU hMenu, hFileMenu, hChoiceMenu, hHelpMenu;
	memset(&w, 0, sizeof(WNDCLASS));
	w.style = CS_HREDRAW | CS_VREDRAW;
	w.lpfnWndProc = WndProc;
	w.hInstance = hInstance;
	w.hbrBackground = CreateSolidBrush(0x00FFFFFF);
	w.lpszClassName = _T("Задание №1");
	RegisterClass(&w);
	hwnd = CreateWindow(_T("Задание №1"),
		_T("Графики функции"),
		WS_OVERLAPPEDWINDOW,
		450, 450, 450, 450, NULL, NULL,
		hInstance, NULL);
	hChoiceMenu = CreatePopupMenu();
	AppendMenu(hChoiceMenu, MF_ENABLED | MF_STRING, IDM_XT, _T("График x = x(t)"));
	AppendMenu(hChoiceMenu, MF_ENABLED | MF_STRING, IDM_YT, _T("График y = y(t)"));
	AppendMenu(hChoiceMenu, MF_ENABLED | MF_STRING, IDM_YX, _T("График y = y(x)"));

	hFileMenu = CreatePopupMenu();
	AppendMenu(hFileMenu, MF_ENABLED | MF_STRING, IDM_AXIS, _T("Рисовать Оси"));
	AppendMenu(hFileMenu, MF_POPUP | MF_STRING, (UINT)hChoiceMenu, _T("Отображение функции"));
	AppendMenu(hFileMenu, MF_SEPARATOR, 0, 0);
	AppendMenu(hFileMenu, MF_ENABLED | MF_STRING, IDM_EXIT, _T("Выход"));

	hHelpMenu = CreatePopupMenu();
	AppendMenu(hHelpMenu, MF_ENABLED | MF_STRING, IDM_ABOUT, _T("О программе"));

	hMenu = CreateMenu();
	AppendMenu(hMenu, MF_ENABLED | MF_POPUP, (UINT)hFileMenu, _T("М&еню"));
	AppendMenu(hMenu, MF_ENABLED | MF_POPUP, (UINT)hHelpMenu, _T("С&правка"));

	SetMenu(hwnd, hMenu);
	ShowWindow(hwnd, nCmdShow);
	UpdateWindow(hwnd);
	DrawMenuBar(hwnd);

	while (GetMessage(&msg, NULL, 0, 0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return msg.wParam;
}
// Оконная функция
LONG WINAPI WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
	HDC hdc;
	PAINTSTRUCT ps;
	static BOOL bShowAxis = FALSE;
	static int nShowFunc = 0;
	HMENU hSelectMenu;
	switch (Message)
	{
	case WM_COMMAND:
		switch (wParam)
		{
		case IDM_EXIT:
			SendMessage(hwnd, WM_CLOSE, (WPARAM)NULL, (LPARAM)NULL);
			break;
		case IDM_ABOUT:
			MessageBox(hwnd, _T("ПС(КТУР)-182 Федотов М.А."), _T("Справка"), MB_OK | MB_ICONINFORMATION);
			break;
		case IDM_AXIS:
			hSelectMenu = GetMenu(hwnd);
			if (CheckMenuItem(hSelectMenu, IDM_AXIS, MF_CHECKED))
			{
				bShowAxis = FALSE;
				CheckMenuItem(hSelectMenu, IDM_AXIS, MF_UNCHECKED);
			}
			else
			{
				bShowAxis = TRUE;
				CheckMenuItem(hSelectMenu, IDM_AXIS, MF_CHECKED);
			}
			break;
		case IDM_XT:
			nShowFunc = 1;
			break;
		case IDM_YT:
			nShowFunc = 2;
			break;
		case IDM_YX:
			nShowFunc = 3;
			break;
		}
		InvalidateRect(hwnd, NULL, TRUE);   //перерисовать окно вместе с фоном
		break;

	case WM_PAINT:
		hdc = BeginPaint(hwnd, &ps);
		if (bShowAxis)
			DrawAxis(hdc, ps.rcPaint);
		SetTextColor(hdc, 0x00FF0000);
		switch (nShowFunc)
		{
		case 0:
			TextOut(hdc, 10, 20, _T("Для начала работы выберите пункт в разделе Меню"), 47);
			break;
		case 1:
			TextOut(hdc, 10, 20, _T("x(t) = 2sin(t) + cos(3t)"), 28);
			DrawGraphXT(hdc, ps.rcPaint);
			break;
		case 2:
			TextOut(hdc, 10, 20, _T("y(t) = cos(3t) + cos(t)"), 24);
			DrawGraphYT(hdc, ps.rcPaint);
			break;
		case 3:
			TextOut(hdc, 10, 20, _T("y(t) = cos(3t) + cos(t)"), 24);
			TextOut(hdc, 10, 40, _T("x(t) = 2sin(t) + cos(3t)"), 28);

			DrawGraphYX(hdc, ps.rcPaint);
			break;
		}
		SetTextColor(hdc, 0x00FF0000);
		EndPaint(hwnd, &ps);
		break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hwnd, Message, wParam, lParam);
	}
	return 0;
}