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/*****************************************************************************
 * qt4.cpp : QT4 interface
 ****************************************************************************
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 * Copyright © 2006-2008 the VideoLAN team
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 * $Id$
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 *
 * Authors: Clément Stenac <zorglub@videolan.org>
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 *          Jean-Baptiste Kempf <jb@videolan.org>
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 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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 *****************************************************************************/
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#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
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#include <QApplication>
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#include <QLocale>
#include <QTranslator>
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#include <QDate>
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#include "qt4.hpp"
#include "dialogs_provider.hpp"
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#include "input_manager.hpp"
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#include "main_interface.hpp"
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#include "dialogs/help.hpp" /* update */
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#ifdef HAVE_X11_XLIB_H
#include <X11/Xlib.h>
#endif

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#include "../../../share/vlc32x32.xpm"
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#include "../../../share/vlc32x32-christmas.xpm"
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/*****************************************************************************
 * Local prototypes.
 *****************************************************************************/
static int  Open         ( vlc_object_t * );
static void Close        ( vlc_object_t * );
static int  OpenDialogs  ( vlc_object_t * );
static void Run          ( intf_thread_t * );
static void Init         ( intf_thread_t * );
static void ShowDialog   ( intf_thread_t *, int, int, intf_dialog_args_t * );

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
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#define ADVANCED_PREFS_TEXT N_( "Show advanced prefs over simple ones" )
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#define ADVANCED_PREFS_LONGTEXT N_( "Show advanced preferences and not simple "\
                                    "preferences when opening the preferences "\
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                                    "dialog." )
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#define SYSTRAY_TEXT N_( "Systray icon" )
#define SYSTRAY_LONGTEXT N_( "Show an icon in the systray " \
                             "allowing you to control VLC media player " \
                             "for basic actions" )
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#define MINIMIZED_TEXT N_( "Start VLC with only a systray icon" )
#define MINIMIZED_LONGTEXT N_( "When you launch VLC with that option, " \
                               "VLC will start with just an icon in" \
                               "your taskbar" )
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#define TITLE_TEXT N_( "Show playing item name in window title" )
#define TITLE_LONGTEXT N_( "Show the name of the song or video in the " \
                           "controler window title" )
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#define FILEDIALOG_PATH_TEXT N_( "Path to use in openfile dialog" )
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#define NOTIFICATION_TEXT N_( "Show notification popup on track change" )
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#define NOTIFICATION_LONGTEXT N_( \
    "Show a notification popup with the artist and track name when " \
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    "the current playlist item changes, when VLC is minimized or hidden." )
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#define ADVANCED_OPTIONS_TEXT N_( "Advanced options" )
#define ADVANCED_OPTIONS_LONGTEXT N_( "Show all the advanced options " \
                                      "in the dialogs" )
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#define OPACITY_TEXT N_( "Windows opacity between 0.1 and 1." )
#define OPACITY_LONGTEXT N_( "Sets the windows opacity between 0.1 and 1 " \
                             "for main interface, playlist and extended panel." \
                             " This option only works with Windows and " \
                             "X11 with composite extensions." )
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#define ERROR_TEXT N_( "Show unimportant error and warnings dialogs" )
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#define UPDATER_TEXT N_( "Activate the updates availability notification" )
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#define UPDATER_LONGTEXT N_( "Activate the automatic notification of new " \
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                            "versions of the software. It runs once a week." )
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#define UPDATER_DAYS_TEXT N_("Number of days between two update checks")
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#define COMPLETEVOL_TEXT N_( "Allow the volume to be set to 400%" )
#define COMPLETEVOL_LONGTEXT N_( "Allow the volume to have range from 0% to " \
                                 "400%, instead of 0% to 200%. This option " \
                                 "can distort the audio, since it uses " \
                                 "software amplification." )
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#define SAVEVOL_TEXT N_( "Automatically save the volume on exit" )

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#define BLING_TEXT N_( "Use non native buttons and volume slider" )
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#define PRIVACY_TEXT N_( "Ask for network policy at start" )
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#define SLIDERCOL_TEXT N_( "Define the colours of the volume slider " )
#define SLIDERCOL_LONGTEXT N_( "Define the colours of the volume slider\n " \
                       "By specifying the 12 numbers separated by a ';'\n " \
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            "Default is '255;255;255;20;226;20;255;176;15;235;30;20'\n " \
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            "An alternative can be '30;30;50;40;40;100;50;50;160;150;150;255' ")
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#define VIEWDETAIL_TEXT N_( "Show the opening dialog view in detail mode" )

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#define QT_MODE_TEXT N_( "Selection of the starting mode and look " )
#define QT_MODE_LONGTEXT N_( "Start VLC with:\n" \
                             " - normal mode\n"  \
                             " - a zone always present to show information" \
                                  "as lyrics, album arts...\n" \
                             " - minimal mode with limited controls" )

#define QT_NORMAL_MODE_TEXT N_( "Classic look" )
#define QT_ALWAYS_VIDEO_MODE_TEXT N_( "Complete look with information area" )
#define QT_MINIMAL_MODE_TEXT N_( "Minimal look with no menus" )

static int i_mode_list[] =
    { QT_NORMAL_MODE, QT_ALWAYS_VIDEO_MODE, QT_MINIMAL_MODE };
static const char *psz_mode_list_text[] =
    { QT_NORMAL_MODE_TEXT, QT_ALWAYS_VIDEO_MODE_TEXT, QT_MINIMAL_MODE_TEXT };

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vlc_module_begin();
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    set_shortname( (char *)"Qt" );
    set_description( (char*)_("Qt interface") );
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    set_category( CAT_INTERFACE ) ;
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    set_subcategory( SUBCAT_INTERFACE_MAIN );
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    set_capability( "interface", 151 );
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    set_callbacks( Open, Close );

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    add_shortcut("qt");
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    add_submodule();
        set_description( "Dialogs provider" );
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        set_capability( "dialogs provider", 51 );
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        add_integer( "qt-display-mode", QT_NORMAL_MODE, NULL,
                     QT_MODE_TEXT, QT_MODE_LONGTEXT, VLC_FALSE );
            change_integer_list( i_mode_list, psz_mode_list_text, 0 );
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        add_bool( "qt-notification", VLC_TRUE, NULL, NOTIFICATION_TEXT,
                  NOTIFICATION_LONGTEXT, VLC_FALSE );
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        add_float_with_range( "qt-opacity", 1., 0.1, 1., NULL, OPACITY_TEXT,
                  OPACITY_LONGTEXT, VLC_FALSE );
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        add_bool( "qt-blingbling", VLC_TRUE, NULL, BLING_TEXT,
                  BLING_TEXT, VLC_FALSE );
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        add_bool( "qt-system-tray", VLC_TRUE, NULL, SYSTRAY_TEXT,
                SYSTRAY_LONGTEXT, VLC_FALSE);
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        add_bool( "qt-start-minimized", VLC_FALSE, NULL, MINIMIZED_TEXT,
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                MINIMIZED_LONGTEXT, VLC_TRUE);
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        add_bool( "qt-name-in-title", VLC_TRUE, NULL, TITLE_TEXT,
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                  TITLE_LONGTEXT, VLC_FALSE );
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        add_bool( "qt-volume-complete", VLC_FALSE, NULL, COMPLETEVOL_TEXT,
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                COMPLETEVOL_LONGTEXT, VLC_TRUE );
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        add_bool( "qt-autosave-volume", VLC_FALSE, NULL, SAVEVOL_TEXT,
                SAVEVOL_TEXT, VLC_TRUE );
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        add_string( "qt-filedialog-path", NULL, NULL, FILEDIALOG_PATH_TEXT,
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                FILEDIALOG_PATH_TEXT, VLC_TRUE );
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            change_autosave();
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            change_internal();
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        add_bool( "qt-adv-options", VLC_FALSE, NULL, ADVANCED_OPTIONS_TEXT,
                  ADVANCED_OPTIONS_LONGTEXT, VLC_TRUE );
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        add_bool( "qt-advanced-pref", VLC_FALSE, NULL, ADVANCED_PREFS_TEXT,
                ADVANCED_PREFS_LONGTEXT, VLC_FALSE );
        add_bool( "qt-error-dialogs", VLC_TRUE, NULL, ERROR_TEXT,
                ERROR_TEXT, VLC_FALSE );
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#ifdef UPDATE_CHECK
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        add_bool( "qt-updates-notif", VLC_TRUE, NULL, UPDATER_TEXT,
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                UPDATER_LONGTEXT, VLC_FALSE );
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        add_integer( "qt-updates-days", 14, NULL, UPDATER_DAYS_TEXT,
                UPDATER_DAYS_TEXT, VLC_FALSE );
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#endif
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        add_string( "qt-slider-colours",
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                "255;255;255;20;226;20;255;176;15;235;30;20",
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                NULL, SLIDERCOL_TEXT, SLIDERCOL_LONGTEXT, VLC_FALSE );
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        add_bool( "qt-open-detail", VLC_FALSE, NULL, VIEWDETAIL_TEXT,
                VIEWDETAIL_TEXT, VLC_FALSE );

        add_bool( "qt-privacy-ask", VLC_TRUE, NULL, PRIVACY_TEXT, PRIVACY_TEXT,
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                VLC_FALSE );
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        set_callbacks( OpenDialogs, Close );
vlc_module_end();

/*****************************************************************************
 * Module callbacks
 *****************************************************************************/
static int Open( vlc_object_t *p_this )
{
    intf_thread_t *p_intf = (intf_thread_t *)p_this;
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#if defined Q_WS_X11 && defined HAVE_X11_XLIB_H
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    /* Thanks for libqt4 calling exit() in QApplication::QApplication()
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     * instead of returning an error, we have to check the X11 display */
    Display *p_display = XOpenDisplay( NULL );
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    if( !p_display )
    {
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        msg_Err( p_intf, "Could not connect to X server" );
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        return VLC_EGENERIC;
    }
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    XCloseDisplay( p_display );
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#endif
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    p_intf->p_sys = (intf_sys_t *)malloc( sizeof( intf_sys_t ) );
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    if( !p_intf->p_sys )
    {
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        msg_Err( p_intf, "Out of memory" );
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        return VLC_ENOMEM;
    }
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    memset( p_intf->p_sys, 0, sizeof( intf_sys_t ) );

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    p_intf->pf_run = Run;

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    p_intf->p_sys->p_playlist = pl_Yield( p_intf );
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    p_intf->p_sys->p_sub = msg_Subscribe( p_intf, MSG_QUEUE_NORMAL );

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    /* We support play on start */
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    p_intf->b_play = VLC_TRUE;

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    return VLC_SUCCESS;
}

static int OpenDialogs( vlc_object_t *p_this )
{
    intf_thread_t *p_intf = (intf_thread_t *)p_this;
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    int val = Open( p_this );
    if( val )
        return val;

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    p_intf->pf_show_dialog = ShowDialog;
    return VLC_SUCCESS;
}

static void Close( vlc_object_t *p_this )
{
    intf_thread_t *p_intf = (intf_thread_t *)p_this;
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    vlc_mutex_lock( &p_intf->object_lock );
    p_intf->b_dead = VLC_TRUE;
    vlc_mutex_unlock( &p_intf->object_lock );

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    if( p_intf->p_sys->b_isDialogProvider )
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    {
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        DialogEvent *event = new DialogEvent( INTF_DIALOG_EXIT, 0, NULL );
        QApplication::postEvent( THEDP, static_cast<QEvent*>(event) );

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        vlc_thread_join( p_intf );
    }

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    vlc_object_release( p_intf->p_sys->p_playlist );
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    msg_Unsubscribe( p_intf, p_intf->p_sys->p_sub );
    free( p_intf->p_sys );
}


/*****************************************************************************
 * Initialize the interface or the dialogs provider
 *****************************************************************************/
static void Run( intf_thread_t *p_intf )
{
    if( p_intf->pf_show_dialog )
    {
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        if( vlc_thread_create( p_intf, "Qt dialogs", Init, 0, VLC_TRUE ) )
            msg_Err( p_intf, "failed to create Qt dialogs thread" );
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    }
    else
        Init( p_intf );
}

static void Init( intf_thread_t *p_intf )
{
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    char dummy[] = "";
    char *argv[] = { dummy };
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    int argc = 1;
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    Q_INIT_RESOURCE( vlc );
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#if !defined(WIN32) && !defined(__APPLE__)
    /* KLUDGE:
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     * disables icon theme use because that makes Cleanlooks style bug
     * because it asks gconf for some settings that timeout because of threads
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     * see commits 21610 21622 21654 for reference */
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    /* If you don't have a gconftool-2 binary, you should comment this line */
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    if( strcmp( qVersion(), "4.4.0" ) < 0 ) /* fixed in Qt 4.4.0 */
        QApplication::setDesktopSettingsAware( false );
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#endif
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    /* Start the QApplication here */
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    QApplication *app = new QApplication( argc, argv , true );
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    if( QDate::currentDate().dayOfYear() >= 354 )
        app->setWindowIcon( QIcon( QPixmap(vlc_christmas_xpm) ) );
    else
        app->setWindowIcon( QIcon( QPixmap(vlc_xpm) ) );
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    p_intf->p_sys->p_app = app;

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    // Initialize timers and the Dialog Provider
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    DialogsProvider::getInstance( p_intf );

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    // Create the normal interface
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    if( !p_intf->pf_show_dialog )
    {
        MainInterface *p_mi = new MainInterface( p_intf );
        p_intf->p_sys->p_mi = p_mi;
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        /* We don't show it because it is done in the MainInterface constructor
        p_mi->show(); */
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        p_intf->p_sys->b_isDialogProvider = false;
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    }
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    else
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    {
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        vlc_thread_ready( p_intf );
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        p_intf->p_sys->b_isDialogProvider = true;
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    }
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#ifdef ENABLE_NLS
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    // Translation - get locale
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    QLocale ql = QLocale::system();
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    // Translations for qt's own dialogs
    QTranslator qtTranslator( 0 );
    // Let's find the right path for the translation file
#if !defined( WIN32 )
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    QString path =  QString( QT4LOCALEDIR );
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#else
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    QString path = QString( QString(config_GetDataDir()) + DIR_SEP +
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                            "locale" + DIR_SEP );
#endif
    // files depending on locale
    bool b_loaded = qtTranslator.load( path + "qt_" + ql.name());
    if (!b_loaded)
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        msg_Dbg( p_intf, "Error while initializing qt-specific localization" );
    app->installTranslator( &qtTranslator );
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#endif  //ENABLE_NLS
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    /* Start playing if needed */
    if( !p_intf->pf_show_dialog && p_intf->b_play )
    {
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        playlist_Control( THEPL, PLAYLIST_PLAY, VLC_FALSE );
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    }

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    /* Explain to the core how to show a dialog :D */
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    p_intf->pf_show_dialog = ShowDialog;
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    /* Last settings */
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    app->setQuitOnLastWindowClosed( false );
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    /*        retrieve last known path used in file browsing */
    char *psz_path = config_GetPsz( p_intf, "qt-filedialog-path" );
    p_intf->p_sys->psz_filepath = EMPTY_STR( psz_path ) ? psz_path
                           : p_intf->p_libvlc->psz_homedir;

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#ifdef UPDATE_CHECK
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    /* Checking for VLC updates */
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    if( config_GetInt( p_intf, "qt-updates-notif" ) )
    {
        int interval = config_GetInt( p_intf, "qt-updates-days" );
        QSettings settings( "vlc", "vlc-qt-interface" );
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        if( QDate::currentDate() >
                settings.value( "updatedate" ).toDate().addDays( interval ) )
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        {
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            /* The constructor of the update Dialog will do the 1st request */
            UpdateDialog::getInstance( p_intf );
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            settings.setValue( "updatedate", QDate::currentDate() );
        }
    }
#endif
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    /* Launch */
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    app->exec();
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    /* And quit */
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    /* Destroy first the main interface because it is connected to some slots
       in the MainInputManager */
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    delete p_intf->p_sys->p_mi;
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    /* Destroy then other windows, because some are connected to some slots
       in the MainInputManager */
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    DialogsProvider::killInstance();
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    /* Destroy the MainInputManager */
    MainInputManager::killInstance();

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    delete app;

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    config_PutPsz( p_intf, "qt-filedialog-path", p_intf->p_sys->psz_filepath );
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    free( psz_path );
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}

/*****************************************************************************
 * Callback to show a dialog
 *****************************************************************************/
static void ShowDialog( intf_thread_t *p_intf, int i_dialog_event, int i_arg,
                        intf_dialog_args_t *p_arg )
{
    DialogEvent *event = new DialogEvent( i_dialog_event, i_arg, p_arg );
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    QApplication::postEvent( THEDP, static_cast<QEvent*>(event) );
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}
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/*****************************************************************************
 * PopupMenuCB: callback to show the popupmenu.
 *  We don't show the menu directly here because we don't want the
 *  caller to block for a too long time.
 *****************************************************************************/
static int PopupMenuCB( vlc_object_t *p_this, const char *psz_variable,
                        vlc_value_t old_val, vlc_value_t new_val, void *param )
{
    intf_thread_t *p_intf = (intf_thread_t *)param;
    ShowDialog( p_intf, INTF_DIALOG_POPUPMENU, new_val.b_bool, 0 );
    return VLC_SUCCESS;
}