combobox.c

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <minigui/common.h>
#include <minigui/minigui.h>
#include <minigui/gdi.h>
#include <minigui/window.h>
#include <minigui/control.h>

#define IDC_CTRL1     100
#define IDC_CTRL2     110
#define IDC_CTRL3     120
#define IDC_CTRL4     130
#define IDC_CTRL5     140

static HWND hMainWnd = HWND_INVALID;

static int ControlTestWinProc(HWND hWnd, int message, WPARAM wParam, LPARAM lParam)
{
    int i;
    static HWND hChildWnd1, hChildWnd2, hChildWnd3,hChildWnd4,hChildWnd5;
    char temp[20];
    switch (message) {
        case MSG_CREATE:
              hChildWnd5 = CreateWindow ("BUTTON", 
                                        "OK", 
                                        WS_CHILD 
                                        | WS_VISIBLE, 
                                        IDC_CTRL5, 
                                        200, 180, 40, 25, hWnd, 0);

              hChildWnd1 = CreateWindow ("COMBOBOX", 
                              "combobox", 
                              WS_CHILD | CBS_DROPDOWNLIST | WS_VISIBLE, 
                              IDC_CTRL1, 
                              30, 12, 110, 24, hWnd, (DWORD)150);//150为Listbox的高度
              hChildWnd2 = CreateWindow ("COMBOBOX", 
                              "", 
                              WS_CHILD| CBS_DROPDOWNLIST | WS_VISIBLE, 
                              IDC_CTRL2, 
                              30, 180, 110, 24, hWnd, (DWORD)90);//90为Listbox的高度

              hChildWnd3 = CreateWindow ("COMBOBOX", 
                              "", 
                              WS_CHILD|WS_VISIBLE|CBS_DROPDOWNLIST, 
                              IDC_CTRL3, 
                              30, 140, 110, 24, hWnd,0);
 
              hChildWnd4 = CreateWindow ("EDIT", 
                                        "ComBoBox Test", 
                                        WS_CHILD | WS_BORDER
                                        | WS_VISIBLE, 
                                        IDC_CTRL4, 
                                        200, 30, 80, 30, hWnd, 0);


           for(i=0;i<20;i++)
           { 
            sprintf(temp,"%d-Welcome",i);
            SendMessage(hChildWnd1,CB_ADDSTRING,0,(LPARAM)temp) ;
            SendMessage(hChildWnd2,CB_ADDSTRING,0,(LPARAM)temp) ;
            SendMessage(hChildWnd3,CB_ADDSTRING,0,(LPARAM)temp) ;
          } 
        break;

        case MSG_COMMAND:
        {
            int id   = LOWORD(wParam);
            int code = HIWORD(wParam);
            char str[151];
            int i; 

            switch (id)
            {
                case IDC_CTRL1:
                 if(code!=CBN_SELCHANGE)
                    break;
                  i=SendMessage(hChildWnd1,CB_GETCURSEL,0,0);
                  if(i>=0)
                   {
                    SendMessage(hChildWnd1,CB_GETLBTEXT,i,(LPARAM)str);
                    if(strlen(str))
                     SetWindowText(hChildWnd4,str);
                   }
                break;
            
                case IDC_CTRL2:
                break;
                
                case IDC_CTRL3:
                {
                break;
                }
                default:
                break;
            }

        }
        break;

        case MSG_CLOSE:
            DestroyMainWindow (hWnd);
            MainWindowCleanup (hWnd);
            hMainWnd = HWND_INVALID;
        return 0;
    }

    return  DefaultMainWinProc(hWnd, message, wParam, lParam);
}

static void InitCreateInfo(PMAINWINCREATE pCreateInfo)
{
    pCreateInfo->dwStyle = WS_CAPTION | WS_BORDER | WS_VISIBLE;
    pCreateInfo->dwExStyle = WS_EX_IMECOMPOSE;
    pCreateInfo->spCaption = "ComboBox control" ;
    pCreateInfo->hMenu = 0;
    pCreateInfo->hCursor = GetSystemCursor(IDC_ARROW);
    pCreateInfo->hIcon = 0;
    pCreateInfo->MainWindowProc = ControlTestWinProc;
    pCreateInfo->lx = 0; 
    pCreateInfo->ty = 0;
    pCreateInfo->rx = 320;
    pCreateInfo->by = 240;
    pCreateInfo->iBkColor = GetWindowElementColor (BKC_CONTROL_DEF); 
    pCreateInfo->dwAddData = 0;
    pCreateInfo->hHosting = HWND_DESKTOP;
}

void combobox_demo (HWND hwnd)
{
    MAINWINCREATE CreateInfo;

    if (hMainWnd != HWND_INVALID) {
        ShowWindow (hMainWnd, SW_SHOWNORMAL);
        return;
    }

    InitCreateInfo (&CreateInfo);
    CreateInfo.hHosting = hwnd;

    hMainWnd = CreateMainWindow (&CreateInfo);
}