2021-11-06

跳动的字符//Windows编程

// 跳动的字符.cpp : Defines the entry point for the application.
//

#include “stdafx.h”
#include “resource.h”

#define MAX_LOADSTRING 100

// Global Variables:
HINSTANCE hInst; // current instance
TCHAR szTitle[MAX_LOADSTRING]; // The title bar text
TCHAR szWindowClass[MAX_LOADSTRING]; // The title bar text

// Foward declarations of functions included in this code module:
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK About(HWND, UINT, WPARAM, LPARAM);

int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
// TODO: Place code here.
MSG msg;
HACCEL hAccelTable;

// Initialize global strings
LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadString(hInstance, IDC_MY, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance);

// Perform application initialization:
if (!InitInstance (hInstance, nCmdShow)) 
{
	return FALSE;
}

hAccelTable = LoadAccelerators(hInstance, (LPCTSTR)IDC_MY);

// Main message loop:
while (GetMessage(&msg, NULL, 0, 0)) 
{
	if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg)) 
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
}

return msg.wParam;

}

//
// FUNCTION: MyRegisterClass()
//
// PURPOSE: Registers the window class.
//
// COMMENTS:
//
// This function and its usage is only necessary if you want this code
// to be compatible with Win32 systems prior to the ‘RegisterClassEx’
// function that was added to Windows 95. It is important to call this function
// so that the application will get ‘well formed’ small icons associated
// with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEX wcex;

wcex.cbSize = sizeof(WNDCLASSEX); 

wcex.style			= CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc	= (WNDPROC)WndProc;
wcex.cbClsExtra		= 0;
wcex.cbWndExtra		= 0;
wcex.hInstance		= hInstance;
wcex.hIcon			= LoadIcon(hInstance, (LPCTSTR)IDI_MY);
wcex.hCursor		= LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground	= (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName	= (LPCSTR)IDC_MY;
wcex.lpszClassName	= szWindowClass;
wcex.hIconSm		= LoadIcon(wcex.hInstance, (LPCTSTR)IDI_SMALL);

return RegisterClassEx(&wcex);

}

//
// FUNCTION: InitInstance(HANDLE, int)
//
// PURPOSE: Saves instance handle and creates main window
//
// COMMENTS:
//
// In this function, we save the instance handle in a global variable and
// create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
HWND hWnd;

hInst = hInstance; // Store instance handle in our global variable

hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

if (!hWnd)
{
return FALSE;
}

ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);

return TRUE;
}

//
// FUNCTION: WndProc(HWND, unsigned, WORD, LONG)
//
// PURPOSE: Processes messages for the main window.
//
// WM_COMMAND - process the application menu
// WM_PAINT - Paint the main window
// WM_DESTROY - post a quit message and return
//
//

int nchar=1;//定义一个初始往上跳的位置，从第一个字符开始跳

bool direct;

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
int wmId, wmEvent;
PAINTSTRUCT ps;
HDC hdc;
TCHAR szHello[MAX_LOADSTRING];
LoadString(hInst, IDS_HELLO, szHello, MAX_LOADSTRING);

TCHAR textbuf[]="nihao,HelloWorld!I like China!";
int x=0,y=0;
int len=strlen(textbuf);
TEXTMETRIC tm;
HFONT hf,hfbig;
switch (message) 
{
	case WM_CREATE:
		::SetTimer(hWnd,1,300,NULL);
	case WM_TIMER:
		::InvalidateRect(hWnd,NULL,true);
		break;
	case WM_COMMAND:
		wmId    = LOWORD(wParam); 
		wmEvent = HIWORD(wParam); 
		// Parse the menu selections:
		switch (wmId)
		{
			case IDM_ABOUT:
			   DialogBox(hInst, (LPCTSTR)IDD_ABOUTBOX, hWnd, (DLGPROC)About);
			   break;
			case IDM_EXIT:
			   DestroyWindow(hWnd);
			   break;
			default:
			   return DefWindowProc(hWnd, message, wParam, lParam);
		}
		break;
	case WM_PAINT:
		hdc = BeginPaint(hWnd, &ps);
		// TODO: Add any drawing code here...
		RECT rt;
		GetClientRect(hWnd, &rt);
		//DrawText(hdc, szHello, strlen(szHello), &rt, DT_CENTER);


		if(direct)
		{
			 nchar++;
			if(nchar==len-1)
				direct=false;
		}
		else
		{
			nchar--;
			if(nchar==0)
			direct=true;
		}
	::GetTextMetrics(hdc,&tm);//获取字体信息

	hf=::CreateFont(20,0,0,0,0,0,0,0,0,0,0,0,0,NULL);//20为原来字体大小

	hfbig=CreateFont(40,0,0,0,0,0,0,0,0,0,0,0,0,NULL);//40为跳动时字体的大小

	int offset;
	offset=tm.tmHeight+tm.tmExternalLeading+20;//设置y偏移量，也就是字体跳动的高度

	//输出第一部分

	int i;
	y=y+offset;//初始位置x=0,y=offset+y;
	::SelectObject(hdc,hf);
	for( i=0;i<nchar;i++)
	{
		 x=x+tm.tmAveCharWidth*2;//字体之间的行间距
		 TextOut(hdc,x,y,&textbuf[i],1);
	}

	//往上跳的字符（第二部分）

	x=x+tm.tmAveCharWidth*2;
	y=y-offset;
	::SelectObject(hdc,hfbig);
	::SetTextColor(hdc,RGB(255,0,0));
	::TextOut(hdc,x,y,&textbuf[nchar],1);


	//输出第三部分

	y=y+offset;
	::SelectObject(hdc,hf);
	::SetTextColor(hdc,RGB(0,0,0));
	for(i=nchar+1;i<len;i++)
	{
		x=x+tm.tmAveCharWidth*2;
		::TextOut(hdc,x,y,&textbuf[i],1);
	}


		EndPaint(hWnd, &ps);
		break;
	case WM_DESTROY:
		PostQuitMessage(0);
		::KillTimer(hWnd,1);
		break;
	default:
		return DefWindowProc(hWnd, message, wParam, lParam);

}
return 0;
}

// Mesage handler for about box.
LRESULT CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_INITDIALOG:
return TRUE;

	case WM_COMMAND:
		if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL) 
		{
			EndDialog(hDlg, LOWORD(wParam));
			return TRUE;
		}
		break;
}
return FALSE;

}

标签：11,06,int,hWnd,WM,return,2021,hInstance,wcex
来源： https://blog.csdn.net/qq_45656196/article/details/121183437