//
// EX04WIN.CPP
//
//  C++/Windows Example program for ArchiveLib 2.0
//
//  Copyright (c) Greenleaf Software, Inc. 1994 - 1996
//  All Rights Reserved
//
// MEMBERS/FUNCTIONS DEMONSTRATED
//
//  ALStorage::~ALStorage()
//  ALStorage::Compare()
//  ALStorage::Delete()
//  ALFile::ALFile()
//  ALFile::~ALFile()
//  ALMemory::ALMemory()
//  ALArchiveBase::Extract()
//  ALArchive::ALArchive()
//  ALName::GetSafeName()
//
// DESCRIPTION
//
//
// EX04WIN.CPP demonstrates ALMemory::ALMemory().  It lets you
// compress selected input files to a memory archive.  It then turns around
// and decompresses the objects to a new memory files, then compares the
// contents of the two.
//
// This is a very simple Windows program.  It works by creating a modeless
// dialog box, then wrapping a framing window around it.  By using a framing
// window as the main window we are able to handle accelerator keys, menus,
// and icons a bit easier. Because of this approach, WinMain() and
// MainWndProc() are not very exciting, and have been moved down to the
// bottom of the file.  MainWndProc() does handle menus and accelerator
// keys, so it comes first.
//
// REVISION HISTORY
//
//  February 1, 1996  2.0A  : Second release
//

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

#include "al.h"
#include "ex04win.h"

/*
 * I don't have a 32 bit version of CTL3D.DLL for Symantec or Microsoft.
 */

#if defined( AL_BORLAND ) || !defined( AL_FLAT_MODEL )
#define AL_3D
#include "ctl3d.h"
#else
#define Ctl3dColorChange()
#define Ctl3dRegister( a )
#define Ctl3dAutoSubclass( a )
#define Ctl3dUnregister( a )
#endif


int NEAR iInstanceNumber;
HINSTANCE hInstance;
HWND hDlgMain = 0;
ALStorage *pObject = 0;

void SizeFramingWindow( HWND hDlg );

//
// This routine is a bit longer than I might have liked.  This is because
// it really is several routines combined into one.  It's most important
// tasks are to first create a memory based archive with a bunch of files
// stuffed into it, then extract all those files into newly created
// memory objects.  Finally, the orginal files are compared to the memory
// objects to make sure the compress/extract cycle is good.
//

void CompressFiles( HWND hDlg, int list_box )
{
//
// The first section of this routine is pretty similar to lots of other
// example programs, both under Windows and DOS.  We create a new archive
// using an ALMemory object as the base, then create a list with elements
// picked out from a list box, then insert them into an archive.
//
    ALWindowsMessage monitor( AL_MONITOR_OBJECTS,
                              GetDlgItem( hDlg, AL_PROGRESS_TEXT ),
                              AL_SEND_RATIO,
                              GetDlgItem( hDlg, AL_PROGRESS_BAR ) );
    pObject = new ALWinMemory( "archive in RAM" );
    if ( !pObject )
        return;
#if defined( ZIP )
    ALPkArchive archive( *pObject );
    ALEntryList list( &monitor );  //Deliberately use default engine
#else
    ALGlArchive archive( *pObject );
    ALEntryList list( &monitor );
#endif
    list.MakeEntriesFromListBox( hDlg, list_box );
    archive.Create( list );
    if ( pObject->mStatus < 0 ) {
        delete pObject;
        pObject = 0;
        MessageBox( hDlg, "Error creating archive", "EX04WIN", MB_ICONEXCLAMATION );
        return;
    }
//
// Here I modify the job list so that the archive data records will
// be extracted to memory objects instead of file objects.  Then I
// execute the extract function, creating a scad of new ALMemory
// objects.  At this point, the only way I have of getting to those
// memory objects is by way of the list, so I have to hang on to it.
// But I'm done with the archive, so I can delete it.
//
    for ( ALEntry *job = list.GetFirstEntry();
          job != 0;
          job = job->GetNextEntry() ) {
        ALName *temp = new ALName( job->mpStorageObject->mName );
        delete job->mpStorageObject;
#if defined( AL_FLAT_MODEL )
        job->mpStorageObject = new ALMemory( *temp );
#else
        job->mpStorageObject = new ALHugeMemory( *temp );
#endif
        delete temp;
    }
    archive.Extract( list );
    if ( archive.mStatus < 0 ) {
        delete pObject;
        pObject = 0;
        MessageBox( hDlg, "Error extracting from archive", "EX04WIN", MB_ICONEXCLAMATION );
        return;
    }
    pObject->Delete();
    delete pObject;
    pObject = 0;
//
//  Now I iterate through the list.  For every entry in the list, I compare
//  the memory object with the original ALFile object.  note that I am
//  using a monitor object to track the progress of the comparison.  This
//  is kind of a tricky bit.  Anyway, I do the compare and print the
//  results.
//
    for ( job = list.GetFirstEntry();
          job != 0;
          job = job->GetNextEntry() )
    {
        pObject = new ALFile( job->mpStorageObject->mName );
        char buf[ 128 ];
        wsprintf( buf,
                  "Comparing %s",
                  (LPSTR) job->mpStorageObject->mName.GetSafeName() );
        SetDlgItemText( hDlg, AL_PROGRESS_TEXT, buf );
        pObject->mpMonitor = &monitor;
//
// Since I am monitoring objects, I need to set up these two data members in
// the monitor if I expect it to work properly.
//
        pObject->mpMonitor->mlObjectSize = -1;
        pObject->mpMonitor->mlObjectStart = 0;
        int result = pObject->Compare( *job->mpStorageObject );
        if ( result != AL_SUCCESS )
            SetDlgItemText( hDlg, AL_PROGRESS_TEXT, "Failure!" );
        if ( pObject->mStatus < 0 ) {
            delete pObject;
            pObject = 0;
            return;
        } else {
            delete pObject;
            pObject = 0;
            SetDlgItemText( hDlg, AL_PROGRESS_TEXT, "Success!" );
        }
    }
}

//
// This is the window procedure for the modeless dialog.  It is where
// all the commands and so on are handled.
//

BOOL AL_EXPORT CALLBACK MainDialogProc( HWND hDlg,
                                        UINT message,
                                        WPARAM wParam,
                                        LPARAM lParam )
{
    switch ( message ) {
//
// This is where I initialize the window title, and clear/set any other
// controls to their proper initial state.
//
        case WM_INITDIALOG :
            SizeFramingWindow( hDlg );
            char buf[ 81 ];
            wsprintf( buf, "Windows Example 04 <instance %d>", iInstanceNumber );
            SetWindowText( GetParent( hDlg ), buf );
            SendDlgItemMessage( hDlg,
                                AL_INPUT_LIST,
                                LB_DIR,
                                DDL_READWRITE,
                                (LPARAM)( (LPSTR) "*.*" ) );
            return( TRUE );
//
// CTL3D stuff. I'm not entirely sure what this does, but the dox say
// to use it.
//
        case WM_SYSCOLORCHANGE :
           Ctl3dColorChange();
           break;
//
// Everything exciting the user wants to make happen gets to the program
// byt way of the WM_COMMAND message handler.
//
        case WM_COMMAND :
            switch ( LOWORD( wParam ) ) {
//
// The only command I am locking for on the list box is the double click.
// If I see a double click, it means it is time to compress the files.
//
                case AL_INPUT_LIST :
#if defined( AL_FLAT_MODEL )
                    AL_UNUSED_PARAMETER( lParam );
                    switch ( HIWORD( wParam ) ) {
#else
                    switch ( HIWORD( lParam ) ) {
#endif
                        case LBN_DBLCLK :
                            if ( !pObject )
                                CompressFiles( hDlg, AL_INPUT_LIST );
                            break;
                    }
                    break;
//
//  This button or the return key both start the Compression cycle.
//
                case AL_CYCLE :
                case IDOK :
                    if ( !pObject )
                        CompressFiles( hDlg, AL_INPUT_LIST );
                    break;
//
// If the user tries to exit while work is in progress, we just set the
// error status and do something annoying.  Otherwise we close the window
// and shut things down.
//
                case AL_EXIT :
                case WM_QUIT :
                    if ( pObject ) {
                        pObject->mStatus.SetError(
                                    AL_USER_ABORT,
                                    "User pressed abort key" );
                        FlashWindow( GetParent( hDlg ), 1 );
                        FlashWindow( GetParent( hDlg ), 0 );
                        return FALSE;
                    }
                    PostMessage( GetParent( hDlg ),WM_DESTROY, 0, 0 );
                    DestroyWindow( hDlgMain );
                    hDlgMain = 0;
                    return TRUE;
//
// Likewise for abort, we set the error status for the object in question.
//
                case AL_ABORT :
                    if ( pObject )
                        pObject->mStatus.SetError( AL_USER_ABORT, 
                                                   "User pressed abort key" );
                    return TRUE;
                default :
                    break;
            }
            break;
    }
    return FALSE;
}


//
// The about box dialog procedure is pretty boring.  The most interesting
// thing it does is center itself on the screen.
//

BOOL AL_EXPORT CALLBACK
AboutDialogProc( HWND hDlg, UINT message, WPARAM wParam, LPARAM )
{
    switch ( message ) {
        case WM_INITDIALOG :
            RECT rc;
            GetWindowRect( hDlg, &rc );
            SetWindowPos( hDlg,
                          NULL,
                          ((GetSystemMetrics(SM_CXSCREEN) - (rc.right - rc.left)) / 2),
                          ((GetSystemMetrics(SM_CYSCREEN) - (rc.bottom - rc.top)) / 2),
                          0, 0, SWP_NOSIZE | SWP_NOACTIVATE);
             break;
        case WM_COMMAND :
            switch ( wParam ) {
                case IDOK :
                case WM_QUIT :
                case WM_DESTROY :
                    EndDialog( hDlg, TRUE );
                    return TRUE;

            }
          break;
    }
    return FALSE;
}

//
// The main window is nothing more than a shell that exists to create
// 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_ABOUT :
                    DialogBox( hInstance, "ALAboutDialog", 0, AboutDialogProc );
                    return TRUE;
                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 the initialization routine for the progress gauge,
// registers our class.  It then 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     = hInstance;
        wc.hIcon         = LoadIcon( hInstance, "ALIcon" );
        wc.hCursor       = LoadCursor(NULL,IDC_ARROW);
        wc.hbrBackground = (HBRUSH) GetStockObject( WHITE_BRUSH );
        wc.lpszMenuName  = 0;
        wc.lpszClassName = "GreenleafDialogClass";
        if ( !RegisterClass( &wc ) )
            return FALSE;
        iInstanceNumber = 0;
    } else {
#ifndef AL_FLAT_MODEL
        GetInstanceData( previous_instance,
                         (PBYTE) &iInstanceNumber,
                         sizeof iInstanceNumber );
#endif
        iInstanceNumber++;
    }
    Ctl3dRegister( hInstance );
    Ctl3dAutoSubclass( hInstance );
    HWND hWnd = CreateWindow( "GreenleafDialogClass",
                              "Greenleaf 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, nCmdShow );
    ShowWindow( hDlgMain, SW_SHOW );
    MSG msg;
    HACCEL hAccel = LoadAccelerators( hInstance, "ALAccelerator" );
    while ( GetMessage ( &msg, NULL, NULL, NULL ) ) {
        HWND hWndAccel = GetActiveWindow();
        if ( !( hWndAccel && TranslateAccelerator( hWndAccel, hAccel, &msg ) ) )
        {
            if ( hDlgMain == NULL || !IsDialogMessage( hDlgMain,&msg ) ) {
                TranslateMessage( &msg );
                DispatchMessage( &msg );
            }
        }
    }
    Ctl3dUnregister( instance );
    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_CYCAPTION );
    y /= 2;
    int x = GetSystemMetrics( SM_CXSCREEN );
    x -= rect.right - rect.left;
    x /= 2;
    SetWindowPos( GetParent( hDlg ), 
                  NULL, 
                  x, 
                  y,
                  rect.right - rect.left /*+ GetSystemMetrics( SM_CXBORDER ) * 2 */,
                  rect.bottom - rect.top + GetSystemMetrics( SM_CYCAPTION ) /* + GetSystemMetrics( SM_CYBORDER ) * 2 */,
                  SWP_NOZORDER );
}