[핵심 API로 배우는 윈도우프로그래밍(강경우, 한빛아카데미)] 7장 9번 풀이

#include <Windows.h>
#include<tchar.h>
#include<string.h>
#include<math.h>
//#include"resource.h"
//#pragma comment(linker,"/entry:WinMainCRTStartup /subsystem:console")
LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam);
HINSTANCE hInst;
 
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpszCmdLine, int nCmdShow)
{
    HWND hwnd;
    MSG msg;
    WNDCLASS WndClass;
 
    hInst = hInstance;
    WndClass.style = CS_HREDRAW | CS_VREDRAW;
    WndClass.lpfnWndProc = WndProc;
    WndClass.cbClsExtra = 0;
    WndClass.cbWndExtra = 0;
    WndClass.hInstance = hInstance;
    WndClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    WndClass.hCursor = LoadCursor(NULL, IDC_ARROW);
    WndClass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    WndClass.lpszMenuName = NULL;
    WndClass.lpszClassName = _T("Window Class Name");
 
    RegisterClass(&WndClass);
 
    hwnd = CreateWindow(
        _T("Window Class Name"),
        _T("박정호"),
        WS_OVERLAPPEDWINDOW,
        50,
        50,
        1000,
        500,
        NULL,
        NULL,
        hInstance,
        NULL);
 
    ShowWindow(hwnd, nCmdShow);
    UpdateWindow(hwnd);
 
    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return (int)msg.wParam;
}
#define IDC_COMBO1 100
#define IDC_COMBO2 101
#define IDC_COMBO3 102
#define IDC_COMBO4 103
#define IDC_COMBO5 104
 
#define IDC_COMBO6 105
#define IDC_COMBO7 106
#define IDC_COMBO8 107
#define IDC_COMBO9 108
#define IDC_COMBO10 109
LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
    HDC hdc;
    PAINTSTRUCT ps;
    static HWND hCombo[10];
    static TCHAR BusStop[16][10] = { _T("역전") , _T("시장") , _T("초등학교") , _T("중학교") , _T("고등학교") , _T("대학교") , _T("터미널") , _T("아파트") , _T("백화점") , _T("병원") , _T("전철역") , _T("경찰서") , _T("소방서") , _T("구청") , _T("시청") , _T("동사무소") };
    RECT rect;
    switch (iMsg)
    {
    case WM_CREATE:
        for (int i = 0; i < 5; i++)
            hCombo[i] = (HWND)CreateWindow(_T("combobox"), NULL, WS_CHILD | CBS_DROPDOWN | CBS_NOINTEGRALHEIGHT, i * 160, 100, 100, 400, hwnd, (HMENU)(100 + i), hInst, NULL);
        for (int i = 0; i < 5; i++)
            hCombo[5 + i] = (HWND)CreateWindow(_T("combobox"), NULL, WS_CHILD | CBS_DROPDOWN | CBS_NOINTEGRALHEIGHT, 640 - i * 160, 300, 100, 400, hwnd, (HMENU)(100 + i), hInst, NULL);
        for (int i = 0; i < 10; i++)
            for (int j = 0; j < 16; j++)
                SendMessage(hCombo[i], CB_ADDSTRING, 0, (LPARAM)BusStop[j]);
        break;
    case WM_PAINT:
        hdc = BeginPaint(hwnd, &ps);
        MoveToEx(hdc, 0, 110, NULL);
        LineTo(hdc, 700, 110);
 
        MoveToEx(hdc, 700, 110, NULL);
        LineTo(hdc, 700, 310);
 
        MoveToEx(hdc, 700, 310, NULL);
        LineTo(hdc, 0, 310);
        for (int i = 0; i < 5; i++)
            Rectangle(hdc, i * 160, 100, i * 160 + 100, 120);
        for (int i = 0; i < 5; i++)
            Rectangle(hdc, 640 - i * 160, 300, 640 - i * 160 + 100, 320);
        EndPaint(hwnd, &ps);
        break;
    case WM_RBUTTONDOWN:
        for (int i = 0; i < 5; i++)
        {
            if (LOWORD(lParam) > 160 * i&&LOWORD(lParam) < 160 * i + 100 && HIWORD(lParam) > 100 && HIWORD(lParam) < 120)
            {
                ShowWindow(hCombo[i], SW_SHOW);
                break;
            }
        }
        for (int i = 0; i < 5; i++)
        {
            if (LOWORD(lParam) > 640 - i * 160 && LOWORD(lParam) < 640 - i * 160 + 100 && HIWORD(lParam) > 300 && HIWORD(lParam) < 320)
            {
                ShowWindow(hCombo[i + 5], SW_SHOW);
                break;
            }
        }
        break;
    case WM_COMMAND:
        hdc = GetDC(hwnd);
        if (LOWORD(wParam) - 100 < 5)
            rect = { (LOWORD(wParam) - 100) * 160,80,(LOWORD(wParam) - 100) * 160 + 100,120 };
        else
            rect = { 640 - (LOWORD(wParam) - 105) * 160,280,640 - (LOWORD(wParam) - 105) * 160 + 100,320 };
 
        if (HIWORD(wParam) == CBN_SELCHANGE)
        {
            DrawText(hdc, BusStop[SendMessage(hCombo[LOWORD(wParam) - 100], CB_GETCURSEL, 0, 0)], _tcslen(BusStop[SendMessage(hCombo[LOWORD(wParam) - 100], CB_GETCURSEL, 0, 0)]), &rect, DT_TOP | DT_CENTER);
            ShowWindow(hCombo[LOWORD(wParam) - 100], SW_HIDE);
        }
        ReleaseDC(hwnd, hdc);
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
 
    }
    return DefWindowProc(hwnd, iMsg, wParam, lParam);
}