Question

我有一个进度对话框，其中包含进度条上方的图像。该对话框位于C ++项目资源文件中。这个对话框有＆＃34; CONTROL＆＃34;用于图像控制。现在，当最初显示对话框时，不显示此图像，但在几秒钟后出现图像和按钮

首次加载时如何加载图片和按钮？

调用时显示的对话框

对话框在2秒后更新

RESOURCE.RC

IDD_TESTDIALOG DIALOGEX 0, 0, 335, 74
STYLE DS_SETFONT | DS_FIXEDSYS | DS_CENTER | WS_POPUP | WS_CAPTION
EXSTYLE WS_EX_DLGMODALFRAME | WS_EX_TOPMOST
CAPTION "Connecting.."
FONT 8, "MS Shell Dlg", 400, 0, 0x1
BEGIN
    PUSHBUTTON      "Cancel",IDCANCEL,277,54,50,15
    CONTROL         "",IDC_PROGRESS1,"msctls_progress32",WS_BORDER,12,61,254,6
    LTEXT           "Waiting for server connection...",IDC_PROGRESS_MESSAGE,13,44,181,14
    CONTROL         IDS_APP_TITLE,IDC_BITMAP1,"Static",SS_BITMAP,0,0,333,34
END

Main.cpp的

INT_PTR CALLBACK DialogProc(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
    int wmId, wmEvent;

    switch (message)
    {
    case WM_INITDIALOG:     
        return DefWindowProc(hWnd, message, wParam, lParam);
        //return (INT_PTR)TRUE;
    case WM_PAINT:
        return DefWindowProc(hWnd, message, wParam, lParam);
    case WM_CLOSE:      
        ShowWindow(hDlg, SW_HIDE);
        return (INT_PTR)TRUE;
    case WM_COMMAND:
        wmId = LOWORD(wParam);
        wmEvent = HIWORD(wParam);
        switch (wmId)
        {
        case IDCANCEL:
            //DestroyWindow(hWnd);
            ShowWindow(hDlg, SW_HIDE);
            break;
        default:
            return DefWindowProc(hWnd, message, wParam, lParam);
        }
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    }
    return (INT_PTR)FALSE;
}

// Creating Dialog
g_hToolbar = CreateDialog(GetModuleHandle(NULL), MAKEINTRESOURCE(IDD_TESTDIALOG), hWnd, DialogProc);

Answer 1

问题在于资源文件。

http://winapi.freetechsecrets.com/win32/WIN32Visibility.htm

我们需要在资源对话框中添加 WS_VISIBLE 标志。默认情况下，Windows会创建一个隐藏窗口，除非应用程序指定WS_VISIBLE样式。通常，应用程序在创建窗口后设置WS_VISIBLE样式，以保持创建过程的详细信息对用户隐藏。

<强> RESOURCE.RC

IDD_TESTDIALOG DIALOGEX 0, 0, 335, 74
STYLE DS_SETFONT | DS_FIXEDSYS | DS_CENTER | WS_POPUP | WS_CAPTION | WS_VISIBLE
EXSTYLE WS_EX_DLGMODALFRAME | WS_EX_TOPMOST
CAPTION "Connecting.."
FONT 8, "MS Shell Dlg", 400, 0, 0x1
BEGIN
    PUSHBUTTON      "Cancel",IDCANCEL,277,54,50,15
    CONTROL         "",IDC_PROGRESS1,"msctls_progress32",WS_BORDER,12,61,254,6
    LTEXT           "Waiting for server connection...",IDC_PROGRESS_MESSAGE,13,44,181,14
    CONTROL         IDS_APP_TITLE,IDC_BITMAP1,"Static",SS_BITMAP|WS_VISIBLE,0,0,333,34
END

VC ++项目中基于资源文件的dailog框横幅加载

1 个答案: