波形峰值查找的简单模拟 (使用WinAPI)
2008-11-23 20:31
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预览图/*
* 波形峰值查找的简单模拟 GUI Version
* Coder: blackboy
* Date: 2008-1-15
* Tools: Dev-C++, C, Win32 API
*/
#include <windows.h>
#include <stdio.h>
#include <string.h>
#define MAX_POINTS 70 // 样本值大小
#define JUDGE_WIN_X 1 // 用于判断的x轴距离
#define JUDGE_RATE 1.0 // 用于判断的斜率
// 样本值
const int value[MAX_POINTS] =
{
19,20,20,20,20,19,19,19,20,19,
18,17,16,19,21,19,16,17,18,19,
19,20,20,20,20,20,21,20,20,20,
20,20,20,23,26,23,20,21,21,20,
20,20,20,20,20,19,19,18,17,16,
15,14,13,15,17,15,12,11,10,9,
8, 7, 6, 5, 4, 3, 2, 1, 0, 1
};
// 判断标志
// 趋势 增大:1, 减小:2, 峰值?:3, 保持:0, 无效:-1
int tag[MAX_POINTS] = {-1};
// 扫描每个点
void Scan(int tag[MAX_POINTS])
{
int i;
tag[0] = 0;
// 第一遍扫描
for(i=1; i<MAX_POINTS; i++)
{
if(value[i]>value[i-1])
tag[i] = 1;
else if(value[i]<value[i-1])
tag[i] = 2;
else
tag[i] = 0;
}
// 第二遍扫描
for(i=1; i<MAX_POINTS-1; i++)
{
if(tag[i-1]==1 && tag[i+1]==2)
{
if( (value[i]-value[i-1])/JUDGE_WIN_X > JUDGE_RATE )
tag[i] = 3;
}
}
}
//////////////////// 以下Windows界面框架主要是自动生成的 ////////////////
/* Declare Windows procedure */
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
/* Make the class name into a global variable */
char szClassName[ ] = "WindowsApp";
int WINAPI WinMain (HINSTANCE hThisInstance,
HINSTANCE hPrevInstance,
LPSTR lpszArgument,
int nFunsterStil)
{
HWND hwnd; /* This is the handle for our window */
MSG messages; /* Here messages to the application are saved */
WNDCLASSEX wincl; /* Data structure for the windowclass */
/* The Window structure */
wincl.hInstance = hThisInstance;
wincl.lpszClassName = szClassName;
wincl.lpfnWndProc = WindowProcedure; /* This function is called by windows */
wincl.style = CS_DBLCLKS; /* Catch double-clicks */
wincl.cbSize = sizeof (WNDCLASSEX);
/* Use default icon and mouse-pointer */
wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);
wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
wincl.lpszMenuName = NULL; /* No menu */
wincl.cbClsExtra = 0; /* No extra bytes after the window class */
wincl.cbWndExtra = 0; /* structure or the window instance */
/* Use Windows's default color as the background of the window */
wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;
/* Register the window class, and if it fails quit the program */
if (!RegisterClassEx (&wincl))
return 0;
/* The class is registered, let's create the program*/
hwnd = CreateWindowEx (
0, /* Extended possibilites for variation */
szClassName, /* Classname */
"峰值查找模拟 - coded by blackboy", /* Title Text */
//WS_OVERLAPPEDWINDOW, /* default window */
WS_DLGFRAME | WS_SYSMENU,
CW_USEDEFAULT, /* Windows decides the position */
CW_USEDEFAULT, /* where the window ends up on the screen */
700, /* The programs width */
500, /* and height in pixels */
HWND_DESKTOP, /* The window is a child-window to desktop */
NULL, /* No menu */
hThisInstance, /* Program Instance handler */
NULL /* No Window Creation data */
);
/* Make the window visible on the screen */
ShowWindow (hwnd, nFunsterStil);
/* Run the message loop. It will run until GetMessage() returns 0 */
while (GetMessage (&messages, NULL, 0, 0))
{
/* Translate virtual-key messages into character messages */
TranslateMessage(&messages);
/* Send message to WindowProcedure */
DispatchMessage(&messages);
}
/* The program return-value is 0 - The value that PostQuitMessage() gave */
return messages.wParam;
}
/* This function is called by the Windows function DispatchMessage() */
LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int i;
int ix = 0, iy = 1;
char str[10];
static int cxClient, cyClient;
static int cxChar, cyChar;
static HWND hwndButton; // 按钮
PAINTSTRUCT ps;
HDC hdc;
static POINT pt[MAX_POINTS];
switch (message) /* handle the messages */
{
case WM_CREATE:
cxChar = LOWORD(GetDialogBaseUnits());
cyChar = HIWORD(GetDialogBaseUnits());
// 画按钮
hwndButton = CreateWindow(
"button",
"查找峰值",
WS_CHILD | WS_VISIBLE | BS_DEFPUSHBUTTON,
250,
400,
20*cxChar,
7*cyChar/4,
hwnd,
(HMENU) 1,/* Control ID: 1 */
((LPCREATESTRUCT) lParam)->hInstance,
NULL
);
return 0;
case WM_SIZE:
cxClient = LOWORD (lParam);
cyClient = HIWORD (lParam);
return 0 ;
case WM_PAINT:
// 画坐标及波形
hdc = BeginPaint(hwnd, &ps);
SetMapMode(hdc, MM_LOMETRIC);
SetViewportOrgEx(hdc, 30, cyClient-150, NULL);
SetBkMode(hdc, TRANSPARENT);
//TextOut(hdc, 1000, 700, "Waveform Simulator", strlen("Waveform Simulator"));
LineTo(hdc, 1500, 0);
MoveToEx(hdc, 0, 0, NULL);
LineTo(hdc, 0, 700);
for(i=0; i<MAX_POINTS; i++)
{
pt[i].x = i*20;
pt[i].y = value[i]*20;
if(i%10==0)
{
MoveToEx(hdc, pt[i].x, 0, NULL);
LineTo(hdc, pt[i].x, 20);
TextOut(hdc, pt[i].x-20, -10, str, sprintf(str, "%2d", ix*10));
ix++;
}
// 如果已经按下"查找峰值"按钮, 则在波形中标出
if(tag[i]==3) Rectangle(hdc, pt[i].x+20, pt[i].y+20, pt[i].x-20, pt[i].y-20);
}
for(i=0; i<700; i++)
{
if(i>0 && i%200==0)
{
MoveToEx(hdc, 0, i, NULL);
LineTo(hdc, 20, i);
TextOut(hdc, -60, i+20, str, sprintf(str, "%2d", iy*10));
iy++;
}
}
Polyline(hdc, pt, MAX_POINTS);
EndPaint(hwnd, &ps);
return 0;
case WM_COMMAND:
// 对按下"查找峰值"按钮的响应
if (LOWORD(wParam) == 1 &
HIWORD(wParam) == BN_CLICKED &
(HWND) lParam == hwndButton)
{
Scan(tag);
InvalidateRect(hwnd, NULL, FALSE);
}
return 0;
case WM_DESTROY:
PostQuitMessage (0); /* send a WM_QUIT to the message queue */
break;
default: /* for messages that we don't deal with */
return DefWindowProc (hwnd, message, wParam, lParam);
}
return 0;
}
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