//
// EX15WIN.CPP
//
//  C++/Windows Example program for ArchiveLib 2.0
//
//  Copyright (c) Greenleaf Software, Inc. 1994 - 1996
//  All Rights Reserved
//
// MEMBERS/FUNCTIONS DEMONSTRATED
//
//  ALArchiveBase::FillListBox()
//  ALArchiveBase::ReadDirectory()
//  ALEntry::Duplicate()
//
// DESCRIPTION
//
//  This example program is a grab bag that uses several of the
//  archive status and informational functions.  You open
//  an archive by clicking on it from a list box, then see
//  all the information regarding that archive.
//
//  Note that this program checks for duplicate entries in an archive.
//  You might have to fiddle with the examples here in order to get
//  one with a duplicate entry, because we try to avoid that.  I
//  created a duplicate entry by using a binary file editor and just
//  changing the name of an entry stored at the end of the archive.
//
// REVISION HISTORY
//
//  February 1, 1996  2.0A  : Second release
//

#define STRICT
#include <windows.h>
#include <stdarg.h>

#include "al.h"
#include "ex15win.h"

HINSTANCE hInstance;
HWND hDlgMain;

void SizeFramingWindow( HWND hDlg );
void ReadDir( HWND hDlg );
void UpdateArchiveInfo( HWND HDlg );

//
// Like most of the other examples, this program uses a dialog box as
// a main window.  This is the dialog procedure for that window, and
// it handles all of the user interface, such as buttons, text boxes,
// and keystrokes.  There is a framing window around this dialog, but
// it doesn't do much of anything.
//
BOOL AL_EXPORT CALLBACK MainDialogProc( HWND hDlg,
                                        UINT message,
                                        WPARAM wParam,
                                        LPARAM lParam )
{
    switch ( message ) {
//
// The initialization function fills the list box with the names of all the
// archives in this directory.
//
        case WM_INITDIALOG :
            SizeFramingWindow( hDlg );
            SetWindowText( hDlg, "Windows Example 15" );
#if defined( ZIP )
            SetDlgItemText( hDlg, AL_DIR_MASK, "*.ZIP" );
#else
            SetDlgItemText( hDlg, AL_DIR_MASK, "*.GAL" );
#endif
            ReadDir( hDlg );
            return( TRUE );
//
// WM_COMMAND handles all the button presses and keyboard commands
// that come in on the dialog box.
//
        case WM_COMMAND :
            switch ( LOWORD( wParam ) ) {
//
// If you double click on a file name in the list box, we treat
// it the same as if you pressed enter.  It goes out and gets the
// archive info.
//
                case AL_INPUT_FILES : {
#if defined( AL_FLAT_MODEL )
                    AL_UNUSED_PARAMETER( lParam );
                    switch ( HIWORD( wParam ) ) {
#else
                    switch ( HIWORD( lParam ) ) {
#endif
                        case LBN_DBLCLK :
                            UpdateArchiveInfo( hDlg );
                            break;
                    }
                }
                break;
//
// If you press enter, one of two things happen.  If the focus is on
// the list box, we get all the archive info.  If you are on the
// text box that contains the wild card mask, pressing enter causes
// a new directory to be read into the list box.
//
        case IDOK : //User has pressed enter
            if ( GetFocus() == GetDlgItem( hDlg, AL_DIR_MASK ) )
                ReadDir( hDlg );
            else if ( GetFocus() == GetDlgItem( hDlg, AL_INPUT_FILES ) )
                UpdateArchiveInfo( hDlg );
            break;
//
// Routine exit.
//
        case AL_EXIT :
        case WM_QUIT :
        case WM_DESTROY :
            PostMessage( GetParent( hDlg ),WM_DESTROY, 0, 0 );
            DestroyWindow( hDlgMain );
            hDlgMain = 0;
            return TRUE;
        }
        break;
    }
    return FALSE;
}

//
//  This is the function that does most of the interesting stuff in this
//  example.  It gets the file name from the list box, opens the
//  corresponding archive, then prints out a few status items in
//  text boxes.
//
//  After that, it goes through the archive and looks for any duplicate
//  entries.  If it finds one, it prints it out in the text box.
//
void UpdateArchiveInfo( HWND hDlg )
{
    char buf[ 128 ];
    int i;
    int len;

    i = (int) SendDlgItemMessage( hDlg, AL_INPUT_FILES, LB_GETCURSEL, 0, 0 );
    if ( i == LB_ERR )
        return;
    len = (int) SendDlgItemMessage( hDlg, AL_INPUT_FILES, LB_GETTEXTLEN, i, 0 );
    if ( i == LB_ERR || len < 0 || len > 127 )
        return;
    SendDlgItemMessage( hDlg, AL_INPUT_FILES, LB_GETTEXT, i, (LPARAM) (LPSTR) buf );
    SendDlgItemMessage( hDlg, AL_INPUT_FILES, LB_SETSEL, 0, i );
    SetDlgItemText( hDlg, AL_ARCHIVE_NAME, buf );
#if defined( ZIP )
    ALPkArchive archive( buf );
#else
    ALGlArchive archive( buf );
#endif
    archive.FillListBox( hDlg, AL_ARCHIVE_LISTING );
    char version[ 10 ];
    wsprintf( version, "%04x", archive.GetVersion() );
    SetDlgItemText( hDlg, AL_ARCHIVE_VERSION, version );
    ALEntryList list;
    archive.ReadDirectory( list );
    ALEntry *entry = list.GetFirstEntry();
    while ( entry ) {
        if ( entry->Duplicate( list ) )
            break;
        entry = entry->GetNextEntry();
    }
    if ( entry == 0 )
        SetDlgItemText( hDlg, AL_DUPLICATE_ENTRY_NAME, "None" );
    else {
        SetDlgItemText( hDlg,
                        AL_DUPLICATE_ENTRY_NAME,
                        (LPSTR) entry->mpStorageObject->mName );
        archive.mStatus.SetError( AL_DUPLICATE_ENTRY, "Duplicate entry in archive!" );
    }
    SetDlgItemInt( hDlg, AL_ARCHIVE_STATUS_CODE, (int) archive.mStatus, 1 );
    SetDlgItemText( hDlg, AL_ARCHIVE_STATUS_STRING, archive.mStatus.GetStatusString() );
    SetDlgItemText( hDlg, AL_ARCHIVE_STATUS_DETAIL, archive.mStatus.GetStatusDetail() );
    SetFocus( GetDlgItem( hDlg, AL_EXIT ) );
}

//
// This function reads a list of wild card files into a list box.
// Usually this will be an expansion of "*.GAL", so that it will
// show us a list of archives in the current directory.
//

void ReadDir( HWND hDlg )
{
    char buf[ 128 ];

    GetDlgItemText( hDlg, AL_DIR_MASK, buf, 128 );
    SendDlgItemMessage( hDlg, AL_INPUT_FILES, LB_RESETCONTENT, 0, 0 );
    ALWildCardExpander files( buf );
    char AL_DLL_FAR *p;
    while ( ( p = files.GetNextFile() ) != 0 )
        SendDlgItemMessage( hDlg,
                            AL_INPUT_FILES,
                            LB_ADDSTRING,
                            0,
                            (LPARAM)( (LPSTR) p ) );
    SetFocus( GetDlgItem( hDlg, AL_INPUT_FILES ) );
}


//
// The main window is nothing more than a shell that exists to manage
// the dialog box, take menu commands, and process accelerator keys.
//
LONG AL_EXPORT CALLBACK MainWndProc( HWND hWnd,
                                     UINT message,
                                     WPARAM wParam,
                                     LPARAM lParam )
{
    switch ( message ) {
        case WM_COMMAND:
            switch( wParam ) {
                case AL_EXIT :
                    PostQuitMessage( 0 );
            }
            break;
        case WM_SETFOCUS:
            SetFocus( hDlgMain ); // insure that the Dialog Box has the focus
            break;
        case WM_DESTROY:
            PostQuitMessage( 0 );
            break;
    }
    return DefWindowProc( hWnd, message, wParam, lParam );
}

//
// WinMain calls registers our class, creates the dialog, and starts the
// message pump.
//
int PASCAL WinMain( HINSTANCE instance,
                    HINSTANCE previous_instance,
                    LPSTR,
                    int nCmdShow )
{
    hInstance = instance;
    if ( previous_instance == 0 ) {
        WNDCLASS wc;
        wc.style         = 0;
        wc.lpfnWndProc   = MainWndProc;
        wc.cbClsExtra    = 0;
        wc.cbWndExtra    = 0;
        wc.hInstance     = instance;
        wc.hIcon         = LoadIcon( hInstance, "ALIcon" );
        wc.hCursor       = LoadCursor( NULL, IDC_ARROW );
        wc.hbrBackground = (HBRUSH) GetStockObject( WHITE_BRUSH );
        wc.lpszMenuName  = "ALMenu";
        wc.lpszClassName = "ALClass";
        if ( !RegisterClass( &wc ) )
            return FALSE;
    }
    HWND hWnd = CreateWindow( "ALClass",
                              "ArchiveLib Example Program",
                              WS_OVERLAPPED | WS_CAPTION | WS_MINIMIZEBOX | WS_SYSMENU,
                              CW_USEDEFAULT,
                              0,
                              0,
                              0,
                              NULL,
                              NULL,
                              hInstance,
                              NULL );

    FARPROC lpfn = MakeProcInstance( (FARPROC) MainDialogProc, hInstance );
    hDlgMain = CreateDialog( hInstance, "ALMainDialog", hWnd, (DLGPROC) lpfn );
    ShowWindow( hWnd, (short) nCmdShow );
    ShowWindow( hDlgMain, SW_SHOW );
    MSG msg;
    while ( GetMessage ( &msg, NULL, NULL, NULL ) ) {
        if ( hDlgMain == NULL || !IsDialogMessage( hDlgMain,&msg ) ) {
            TranslateMessage( &msg );
            DispatchMessage( &msg );
        }
    }
    return (msg.wParam);
}

//
// I need this routine for one purpose only.  After the dialog is loaded,
// it calls this routine, which adjusts the size of the framing window to
// fit exactly around the dialog box.  It also moves it to the center of
// the screen.
//

void SizeFramingWindow( HWND hDlg )
{
    RECT rect;

    GetWindowRect( hDlg, &rect );
    int y = GetSystemMetrics( SM_CYSCREEN );
    y -= ( rect.bottom - rect.top );
    y -= GetSystemMetrics( SM_CYMENU ) + GetSystemMetrics( SM_CYCAPTION );
    y /= 2;
    int x = GetSystemMetrics( SM_CXSCREEN );
    x -= rect.right - rect.left;
    x /= 2;
    SetWindowPos( GetParent( hDlg ), NULL, (short) x, (short) y,
                  (short int) ( rect.right-rect.left ),
                  (short int) ( rect.bottom-rect.top +
                  GetSystemMetrics( SM_CYMENU ) +
                  GetSystemMetrics( SM_CYCAPTION ) ),
                  SWP_NOZORDER );
}