CMAKE

CMAKE是跨平台的编译链工具，使用它可以增强代码的移植性，在平时使用Win32窗口程序，较常用的是使用Visual Studio的模板文件，接下来将学习如何设置在CMAKE上使用Win32窗口。

源码

设置编译脚本

# File CMakeLists.txt
cmake_minimum_required (VERSION 3.8)

# Enable Hot Reload for MSVC compilers if supported.
if (POLICY CMP0141)
  cmake_policy(SET CMP0141 NEW)
  set(CMAKE_MSVC_DEBUG_INFORMATION_FORMAT "$<IF:$<AND:$<C_COMPILER_ID:MSVC>,$<CXX_COMPILER_ID:MSVC>>,$<$<CONFIG:Debug,RelWithDebInfo>:EditAndContinue>,$<$<CONFIG:Debug,RelWithDebInfo>:ProgramDatabase>>")
endif()

project ("Win32 App")

set(CMAKE_CXX_STANDARD 17)

list (APPEND PRJ_COMPILE_FEATURES cxx_std_17)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17 /SUBSYSTEM:WINDOWS /ENTRY:WinMainCRTStartup")

add_executable (${PROJECT_NAME} WIN32 main.cpp)

main源码

#include "framework.h"
#include <Windows.h>

/* In framework.h, it has a definition:
#ifndef UNICODE
#define UNICODE
#endif 
*/

using namespace std;

LRESULT CALLBACK WndProc(HWND hwnd, UINT uMsg, WPARAM wPraram, LPARAM lParam);

int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PWSTR pCmdLine, int nCmdShow)
{

    const wchar_t CLASS_NAME[] = L"WIN32 WINDOW CLASS";

    WNDCLASS wc = {};
    wc.lpfnWndProc = WndProc;
    wc.hInstance = hInstance;
    wc.lpszClassName = CLASS_NAME;

    RegisterClass(&wc);

    HWND hwnd = CreateWindowEx(
        0,
        CLASS_NAME,
        L"Win32 App",
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        nullptr,
        nullptr,
        hInstance,
        nullptr
    );

    if (hwnd == nullptr) {
        SKLOGE("Create Window was failed.");
        return 0;
    }

    ShowWindow(hwnd, nCmdShow);

    MSG msg = {};
    while (GetMessage(&msg, nullptr, 0, 0) > 0) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return 0;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch (uMsg)
    {
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;

    case WM_PAINT:
    {
        PAINTSTRUCT ps;
        HDC hdc = BeginPaint(hwnd, &ps);

        // All painting occurs here, between BeginPaint and EndPaint.

        FillRect(hdc, &ps.rcPaint, (HBRUSH)(COLOR_WINDOW + 1));

        EndPaint(hwnd, &ps);
    }
    return 0;

    }
    return DefWindowProc(hwnd, uMsg, wParam, lParam);
}