[C++知识库][C++] [windows.h] WindowsUtils

代码

WindowsUtils.hpp

#ifndef __WGUI_WINDOWSUTILS_HPP__
#define __WGUI_WINDOWSUTILS_HPP__
#include <windows.h>
#include <iostream>
#include <sstream>
#include <map>

namespace WUtils
{
	typedef LRESULT CALLBACK (*WNDPROC)(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam);

	void check(HWND hwnd)
	{
		if (hwnd == NULL)
		{
			int error = GetLastError();
			std::cout << "Error:" << error << std::endl;
			std::stringstream str;
			str << "Window Creation Failed!\nError:" << error;
			MessageBox(NULL, TEXT(str.str().data()), TEXT("Error!"), MB_ICONEXCLAMATION | MB_OK);
		}
	}

	bool registerClass(LPCTSTR className, HINSTANCE hInstance, WNDPROC WndProc)
	{
		WNDCLASSEX wc;

		memset(&wc, 0, sizeof(wc));
		wc.cbSize		 = sizeof(WNDCLASSEX);
		wc.lpfnWndProc	 = WndProc;
		wc.hInstance	 = hInstance;
		wc.hCursor		 = LoadCursor(NULL, IDC_ARROW);

		wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
		wc.lpszClassName = className;
		wc.hIcon		 = LoadIcon(NULL, IDI_APPLICATION);
		wc.hIconSm		 = LoadIcon(NULL, IDI_APPLICATION);

		if (!RegisterClassEx(&wc))
		{
			int error = GetLastError();
			std::cout << "Error:" << error << std::endl;
			std::stringstream str;
			str << "Window Registration Failed!\nError:" << error;
			MessageBox(NULL, TEXT(str.str().data()), TEXT("Error!"), MB_ICONEXCLAMATION | MB_OK);
			return false;
		}

		return true;
	}

	typedef void (*CW_CB)(HWND wndhwnd,HWND thishwnd, UINT Message, WPARAM wParam, LPARAM lParam);

	struct ChildWindow
	{
		HWND hwnd;
		CW_CB cb;
	};

	typedef std::map<int, ChildWindow> ChildMap;

	void ProcessEvent(ChildMap cm, HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
	{
		int id = LOWORD(wParam);
		int event = HIWORD(wParam);
		
		std::cout << id << std::endl;
		std::cout << cm.size() << std::endl;
		
		ChildWindow cw = cm.at(id);
		(*cw.cb)(hwnd,cw.hwnd,Message,wParam,lParam);
	}
	
	void addChild(ChildMap& cm,HWND hwnd,CW_CB cb,int id)
	{
		check(hwnd);
		
		ChildWindow child;
		memset(&child,0,sizeof(ChildWindow));
		child.hwnd = hwnd;
		child.cb = cb;
		
		cm.insert(std::pair<int,ChildWindow>(id,child));
	}
}

#endif

test.cpp

#include <windows.h>
#include "../WindowsUtils.hpp"
using namespace WUtils;

ChildMap childs;
HINSTANCE instanceHandle;
HWND window;
LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
	instanceHandle = hInstance;
	registerClass(TEXT("WindowClass"),hInstance,WndProc);
	window = CreateWindowEx(WS_EX_CLIENTEDGE,TEXT("WindowClass"),TEXT("Window"),WS_VISIBLE|WS_OVERLAPPEDWINDOW,0,0,640,480,NULL,NULL,hInstance,NULL);
	check(window);
	//memset(&childs,0,sizeof(ChildMap));
	
	MSG msg;
	while (GetMessage(&msg, NULL, 0, 0) > 0)
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return msg.wParam;
}
void cb(HWND wndhwnd,HWND thishwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
	MessageBox(thishwnd,TEXT(""),TEXT(""),MB_OK);
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lParam)
{
	switch(Message)
	{
		case WM_CREATE:
			{
				int id = 1;
				/*ChildWindow child;
				memset(&child,0,sizeof(ChildWindow));*/
				HWND btn = CreateWindowEx(WS_EX_WINDOWEDGE,TEXT("button"),TEXT("按钮"),WS_VISIBLE|WS_BORDER|WS_CHILD|BS_CENTER,0,0,100,100,hwnd,(HMENU)id,instanceHandle,NULL);
				/*check(btn);
				child.hwnd = btn;
				child.cb = cb;
				childs.insert({id,child});*/
				addChild(childs,btn,cb,id);
				break;
			}
		case WM_DESTROY:
			{
				PostQuitMessage(0);
				break;
			}
		case WM_COMMAND:
			{
				ProcessEvent(childs,hwnd,Message,wParam,lParam);
				DefWindowProc(hwnd, Message, wParam, lParam);
			}
		default:
			return DefWindowProc(hwnd, Message, wParam, lParam);
	}
	return 0;
}

效果图