View difference between Paste ID: <a href="/Zpe8mC5k">Zpe8mC5k</a> and <a href="/kmf9DWQD">kmf9DWQD</a>

#pragma warning(disable:4996)
1		#pragma warning(disable:4996)
2		#undef UNICODE
3		#include <windows.h>
4		#include "KWnd.h"
5
6		#define _USE_MATH_DEFINES
7		#include <cmath>
8		const int WIDTH = 314;
9		const int HEIGHT = 200;
10
11		void updateRegion(HRGN& hRgn, int left, int top, int right, int bottom);
12
13		LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);
14
15		const int INTERVAL = 50;
16
17		//bool isOdd(int i);
18
19		int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
20		{
21		MSG msg;
22		KWnd mainWnd("MyWin", hInstance, nCmdShow, WndProc);
23		while (GetMessage(&msg, NULL, 0, 0))
24		{
25		TranslateMessage(&msg);
26		DispatchMessage(&msg);
27		}
28		return (msg.wParam);
29		}
30
31		LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
32		{
33		PAINTSTRUCT ps;
34		HDC hDC;
35		//coordinates
36		static int sx, sy;
37		static int x_scr, y_scr;
38		double x;
39		//ball coord
40		//timer t
41		static bool paused = false;
42		static int t = 0;
43		//pens
44		static HPEN hPenAxis, hPenGraphic;
45		//brush
46		static HBRUSH hBrushYellow;
47		//regions
48		static HRGN ellipse;
49		//angle for ball
50		static double ballAngle = -M_PI;
51		//direction
52		static bool forward = true;
53
54		switch (message) {
55		case WM_CREATE:
56		//create pens
57		hPenAxis = CreatePen(PS_SOLID, 2, RGB(0, 0, 255));
58		hPenGraphic = CreatePen(PS_SOLID, 2, RGB(255, 0, 0));
59		//create brush
60		hBrushYellow = CreateSolidBrush(RGB(255, 165, 0));
61		//create timer
62		SetTimer(hWnd, 1, INTERVAL, NULL);
63		//create rgn
64		ellipse = CreateEllipticRgn(sx, sy, sx, sy);
65		break;
66		case WM_SIZE:
67		sx = LOWORD(lParam);
68		sy = HIWORD(lParam);
69		break;
70		case WM_PAINT:
71		//begin paint
72		hDC = BeginPaint(hWnd, &ps);
73		//set modes
74		SetMapMode(hDC, MM_ANISOTROPIC);
75		SetWindowExtEx(hDC, 2 * WIDTH, -2 * HEIGHT, NULL);
76		SetViewportExtEx(hDC, 3 * sx / 4, 3 * sy / 4, NULL);
77		SetViewportOrgEx(hDC, sx / 2, sy / 2, NULL);
78		//draw axis
79		SelectObject(hDC, hPenAxis);
80		MoveToEx(hDC, -WIDTH, 0, NULL);
81		LineTo(hDC, WIDTH, 0);
82		MoveToEx(hDC, 0, HEIGHT, NULL);
83		LineTo(hDC, 0, -HEIGHT);
84		//draw graphic
85		SelectObject(hDC, hPenGraphic);
86		MoveToEx(hDC, -WIDTH, 0, NULL);
87		for (x = -M_PI, x_scr = -WIDTH; x < M_PI; x += 0.02, x_scr += 2)
88		{
89		y_scr = HEIGHT * sin(x);
90		LineTo(hDC, x_scr, y_scr);
91		}
92		//draw ball
93		SelectObject(hDC, hBrushYellow);
94		x_scr = t - WIDTH;
95		y_scr = HEIGHT * sin(ballAngle);
96		updateRegion(ellipse, x_scr - 15, y_scr - 15, x_scr + 15, y_scr + 15);
97		FillRgn(hDC, ellipse, hBrushYellow);
98		EndPaint(hWnd, &ps);
99		break;
100		case WM_RBUTTONDOWN:
101		paused = !paused;
102		break;
103		case WM_TIMER:
104		if (!paused)
105		{
106		if (forward)
107		{
108		t += 3;
109		ballAngle += 0.03;
110		}
111		else if (!forward)
112		{
113		t -= 3;
114		ballAngle -= 0.03;
115		}
116		if (t >= 2 * WIDTH) {
117		forward = false;
118		}
119		else if (t <= 0) {
120		forward = true;
121		}
122		InvalidateRgn(hWnd, NULL, true);
123		}
124		break;
125		case WM_DESTROY:
126		//delete pens
127		DeleteObject(hPenAxis);
128		DeleteObject(hPenGraphic);
129		//delete brush
130		DeleteObject(hBrushYellow);
131		//delete timer
132		KillTimer(hWnd, 1);
133		//delete rgn
134		DeleteObject(ellipse);
135		PostQuitMessage(0);
136		break;
137		default: return DefWindowProc(hWnd, message, wParam, lParam);
138		}
139		return 0;
140		}
141
142		void updateRegion(HRGN& hRgn, int left, int top, int right, int bottom) {
143		DeleteObject(hRgn);
144		hRgn = CreateEllipticRgn(left, top, right, bottom);
145		}