396 lines
14 KiB
C++
Executable File
396 lines
14 KiB
C++
Executable File
//
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// EX03WIN.CPP
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//
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// C++/Windows Example program for ArchiveLib 2.0
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//
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// Copyright (c) Greenleaf Software, Inc. 1994 - 1996
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// All Rights Reserved
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//
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// MEMBERS/FUNCTIONS DEMONSTRATED
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//
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// ALArchiveBase::Delete()
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//
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// DESCRIPTION
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//
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// EX03WIN.CPP demonstrates ALArchiveBase::Delete(). It lets you
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// select a list of files to delete from an archive, then performs
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// the deletion. The list boxes are updated right afterwards so you
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// can see the results.
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//
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// This is a very simple Windows program. It works by creating a modeless
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// dialog box, then wrapping a framing window around it. By using a framing
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// window as the main window we are able to handle accelerator keys, menus,
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// and icons a bit easier. Because of this approach, WinMain() and
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// MainWndProc() are not very exciting, and have been moved down to the
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// bottom of the file. MainWndProc() does handle menus and accelerator
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// keys, so it comes first.
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//
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// REVISION HISTORY
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//
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// February 1, 1996 2.0A : Second release
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//
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#define STRICT
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#include <windows.h>
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#include <stdarg.h>
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#include "al.h"
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#include "ex03win.h"
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//
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int NEAR iInstanceNumber;
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HINSTANCE hInstance;
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HWND hDlgMain = 0;
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ALArchive *pArchive = 0;
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void Delete( HWND hDlg );
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void SizeFramingWindow( HWND hDlg );
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//
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// This function gets the name of an archive, then uses the
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// ALArchiveBase::FillListBox() function to fill it up with
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// names.
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//
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void ReadArchive( HWND hDlg, int archive_name, int list_box )
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{
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char input_name[ 128 ];
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GetDlgItemText( hDlg, archive_name, input_name, 128 );
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SendDlgItemMessage( hDlg, archive_name, EM_SETSEL, (WPARAM) -1, (LPARAM) -1 );
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#if defined( ZIP )
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ALPkArchive archive( input_name );
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#else
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ALGlArchive archive( input_name );
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#endif
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archive.FillListBox( hDlg, list_box );
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}
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//
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// This function performs the deletion. it gets the name of the archive
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// from a text box, then gets the list, then sets marks on the list based
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// on the names set in the list box. The archive delete function then takes
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// care of the hard work.
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//
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// There is one tricky bit here. The pArchive pointer is a global variable.
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// If we are in the middle of updating or deleting, the other functions
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// in this program can figure that out by looking at the pointer. They
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// can also set the error member in pArchive, causing an abort of the
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// delete process.
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//
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void Delete( HWND hDlg )
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{
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char input_name[ 128 ];
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ALWindowsMessage monitor( AL_MONITOR_JOB,
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GetDlgItem( hDlg, AL_PROGRESS_TEXT ),
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AL_SEND_RATIO,
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GetDlgItem( hDlg, AL_PROGRESS_BAR ),
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ALGaugeSetPosition );
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GetDlgItemText( hDlg, AL_INPUT, input_name, 128 );
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#if defined( ZIP )
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pArchive = new ALPkArchive( input_name );
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ALEntryList list( &monitor, PkTools() );
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#else
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pArchive = new ALGlArchive( input_name );
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ALEntryList list( &monitor, GlTools() );
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#endif
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if ( !pArchive )
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return;
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pArchive->ReadDirectory( list );
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list.ClearMarks();
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int count = list.SetMarksFromListBox( hDlg, AL_INPUT_LIST );
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EditDisplay( hDlg,
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AL_DEBUG,
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"%d file%s selected\r\n",
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count,
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( count > 1 ? "s are" : " is" ) );
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//
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// The new archive has a blank name. This tells the delete function
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// to rename it after the deletion is done.
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//
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#if defined( ZIP )
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ALPkArchive archive( "" );
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#else
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ALGlArchive archive( "" );
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#endif
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pArchive->Delete( list, archive );
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SetDlgItemText( hDlg, AL_OUTPUT, pArchive->GetStorageObject()->mName.GetSafeName() );
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ReadArchive( hDlg, AL_INPUT, AL_INPUT_LIST );
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ReadArchive( hDlg, AL_OUTPUT, AL_OUTPUT_LIST );
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delete pArchive;
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pArchive = 0;
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}
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//
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// This is the window procedure for the modeless dialog. It is where
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// all the commands and so on are handled. Most of the activity in
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// the program is invoked as a results of button presses in the
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// main dialog windows.
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//
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BOOL AL_EXPORT CALLBACK MainDialogProc( HWND hDlg,
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UINT message,
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WPARAM wParam,
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LPARAM )
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{
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switch ( message ) {
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//
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// On initialization, we size our framing windows, then set up the window
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// caption, followd by setting up the two text boxes in this dialog.
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//
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case WM_INITDIALOG :
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SizeFramingWindow( hDlg );
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char buf[ 81 ];
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wsprintf( buf, "Windows Example 03 <%d>", iInstanceNumber );
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SetWindowText( GetParent( hDlg ), buf );
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#if defined( ZIP )
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wsprintf( buf, "win%02d.zip", iInstanceNumber );
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#else
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wsprintf( buf, "win%02d.gal", iInstanceNumber );
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#endif
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SetDlgItemText( hDlg, AL_INPUT, buf );
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SetDlgItemText( hDlg, AL_OUTPUT, "" );
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return( TRUE );
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//
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// WM_COMMAND message are generated for most of the button presses and
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// keystrokes that we are concerned with.
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//
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case WM_COMMAND :
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switch ( wParam ) {
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//
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// IDOK indicatest that the user pressed enter. We process that as
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// a command to read the input archive if the focus is in the right spot.
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//
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case IDOK : //User has pressed enter
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if ( GetFocus() == GetDlgItem( hDlg, AL_INPUT ) ) {
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ReadArchive( hDlg, AL_INPUT, AL_INPUT_LIST );
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ReadArchive( hDlg, AL_OUTPUT, AL_OUTPUT_LIST );
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}
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break;
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//
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// When we are supposed to read the input archive, it usually means there
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// is a new filename there. That means we read in the archive using
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// the function provided here, then read in the contents of the backup
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// archive, if one exists.
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//
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case AL_READ_INPUT :
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ReadArchive( hDlg, AL_INPUT, AL_INPUT_LIST );
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ReadArchive( hDlg, AL_OUTPUT, AL_OUTPUT_LIST );
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return TRUE;
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//
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// Before we perform the deletion, we have to check to see if another
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// deletion is already in progress.
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//
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case AL_DELETE :
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if ( !pArchive ) {
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Delete( hDlg );
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if ( pArchive ) {
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delete pArchive;
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pArchive = 0;
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}
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}
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return TRUE;
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//
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// Normally a request to exit is no big deal. But if I am already in the
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// process of performing a deletion, I don't want to try and exist.
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// In that case, I just set the error status for the archive, so it will
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// abort at its own sweet pace.
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//
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case AL_EXIT :
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case WM_QUIT :
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case WM_DESTROY :
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if ( pArchive ) {
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pArchive->GetStorageObject()->mStatus.SetError(
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AL_USER_ABORT,
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"User pressed abort key" );
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FlashWindow( GetParent( hDlg ), 1 );
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FlashWindow( GetParent( hDlg ), 0 );
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return FALSE;
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}
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PostMessage( GetParent( hDlg ),WM_DESTROY, 0, 0 );
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DestroyWindow( hDlgMain );
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hDlgMain = 0;
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return TRUE;
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//
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// To abort a deletion in progress, we just call the set error routine
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// and set the archives status to an error. The delete function will see
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// this as soon as it comes up for air, and it will exit prematurely.
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//
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case AL_ABORT :
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if ( pArchive )
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pArchive->GetStorageObject()->mStatus.SetError(
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AL_USER_ABORT,
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"User pressed abort key" );
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return TRUE;
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default :
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break;
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}
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break;
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}
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return FALSE;
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}
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//
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// The about box dialog procedure is pretty boring. The most interesting
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// thing it does is center itself on the screen.
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//
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BOOL AL_EXPORT CALLBACK
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AboutDialogProc( HWND hDlg, UINT message, WPARAM wParam, LPARAM )
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{
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switch ( message ) {
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case WM_INITDIALOG :
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RECT rc;
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GetWindowRect( hDlg, &rc );
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SetWindowPos( hDlg,
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NULL,
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((GetSystemMetrics(SM_CXSCREEN) - (rc.right - rc.left)) / 2),
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((GetSystemMetrics(SM_CYSCREEN) - (rc.bottom - rc.top)) / 2),
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0, 0, SWP_NOSIZE | SWP_NOACTIVATE);
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break;
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case WM_COMMAND :
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switch ( wParam ) {
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case IDOK :
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case WM_QUIT :
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case WM_DESTROY :
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EndDialog( hDlg, TRUE );
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return TRUE;
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}
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break;
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}
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return FALSE;
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}
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//
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// The main window is nothing more than a shell that exists to create
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// the dialog box, take menu commands, and process accelerator keys.
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//
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LONG AL_EXPORT CALLBACK MainWndProc( HWND hWnd,
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UINT message,
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WPARAM wParam,
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LPARAM lParam )
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{
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switch ( message ) {
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case WM_COMMAND:
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switch( wParam ) {
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case AL_GOTO_INPUT :
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if ( hDlgMain)
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SetFocus( GetDlgItem( hDlgMain, AL_INPUT ) );
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break;
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case AL_ABOUT :
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DialogBox( hInstance, "ALAboutDialog", 0, AboutDialogProc );
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return TRUE;
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case AL_EXIT :
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PostQuitMessage( 0 );
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}
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break;
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case WM_SETFOCUS:
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SetFocus( hDlgMain ); // insure that the Dialog Box has the focus
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break;
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case WM_DESTROY:
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PostQuitMessage( 0 );
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break;
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}
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return DefWindowProc( hWnd, message, wParam, lParam );
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}
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//
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// WinMain calls the initialization routine for the progress gauge,
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// registers our class. It then creates the dialog, and starts the
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// message pump.
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//
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int PASCAL WinMain( HINSTANCE instance,
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HINSTANCE previous_instance,
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LPSTR,
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int nCmdShow )
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{
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hInstance = instance;
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if ( !ALGaugeInit( instance, previous_instance ) )
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return (FALSE);
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if ( previous_instance == 0 ) {
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WNDCLASS wc;
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wc.style = 0;
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wc.lpfnWndProc = MainWndProc;
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wc.cbClsExtra = 0;
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wc.cbWndExtra = 0;
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wc.hInstance = hInstance;
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wc.hIcon = LoadIcon( hInstance, "ALIcon" );
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wc.hCursor = LoadCursor(NULL,IDC_ARROW);
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wc.hbrBackground = (HBRUSH) GetStockObject( WHITE_BRUSH );
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wc.lpszMenuName = "ALMenu";
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wc.lpszClassName = "GreenleafDialogClass";
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if ( !RegisterClass( &wc ) )
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return FALSE;
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iInstanceNumber = 0;
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} else {
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#ifndef AL_FLAT_MODEL
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GetInstanceData( previous_instance,
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(PBYTE) &iInstanceNumber,
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sizeof iInstanceNumber );
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#endif
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iInstanceNumber++;
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}
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HWND hWnd = CreateWindow( "GreenleafDialogClass",
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"Greenleaf Example Program",
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WS_OVERLAPPED | WS_CAPTION | WS_MINIMIZEBOX | WS_SYSMENU,
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CW_USEDEFAULT,
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0,
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0,
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0,
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NULL,
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NULL,
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hInstance,
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NULL );
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FARPROC lpfn = MakeProcInstance( (FARPROC) MainDialogProc, hInstance );
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hDlgMain = CreateDialog( hInstance, "ALMainDialog", hWnd, (DLGPROC) lpfn );
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ShowWindow( hWnd, nCmdShow );
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ShowWindow( hDlgMain, SW_SHOW );
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MSG msg;
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HACCEL hAccel = LoadAccelerators( hInstance, "ALAccelerator" );
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while ( GetMessage ( &msg, NULL, NULL, NULL ) ) {
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HWND hWndAccel = GetActiveWindow();
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if ( !( hWndAccel && TranslateAccelerator( hWndAccel, hAccel, &msg ) ) )
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{
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if ( hDlgMain == NULL || !IsDialogMessage( hDlgMain,&msg ) ) {
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TranslateMessage( &msg );
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DispatchMessage( &msg );
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}
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}
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}
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return (msg.wParam);
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}
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//
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// I need this routine for one purpose only. After the dialog is loaded,
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// it calls this routine, which adjusts the size of the framing window to
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// fit exactly around the dialog box. It also moves it to the center of
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// the screen.
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//
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void SizeFramingWindow( HWND hDlg )
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{
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RECT rect;
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GetWindowRect( hDlg, &rect );
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int y = GetSystemMetrics( SM_CYSCREEN );
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y -= ( rect.bottom - rect.top );
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y -= GetSystemMetrics( SM_CYMENU ) + GetSystemMetrics( SM_CYCAPTION );
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y /= 2;
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int x = GetSystemMetrics( SM_CXSCREEN );
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x -= rect.right - rect.left;
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x /= 2;
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SetWindowPos( GetParent( hDlg ), NULL, x, y,
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rect.right-rect.left,
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rect.bottom-rect.top +
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GetSystemMetrics( SM_CYMENU ) +
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GetSystemMetrics( SM_CYCAPTION ),
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SWP_NOZORDER );
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}
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