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preferences.cpp：源码内容
							/*****************************************************************************
 * preferences.cpp: preferences window for the kde gui
 *****************************************************************************
 * Copyright (C) 2001 VideoLAN
 * $Id: preferences.cpp 6961 2004-03-05 17:34:23Z sam $
 *
 * Authors: Sigmund Augdal <sigmunau@idi.ntnu.no> Mon Aug 12 2002
 *
 * 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
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/
#include <kdialogbase.h>
#include <qmap.h>
#include <qcheckbox.h>
#include <qframe.h>
#include <qgroupbox.h>
#include <qlayout.h>
#include <qlabel.h>
#include <qlistview.h>
#include <qnamespace.h>
#include <qobjectlist.h>
#include <qslider.h>
#include <qspinbox.h>
#include <qtooltip.h>
#include <qvbox.h>
#include <kbuttonbox.h>
#include <klineedit.h>
#include <klocale.h>
#include <knuminput.h>
#include <kurlrequester.h>
#include <kfiledialog.h>
#include <kcombobox.h>
#include "QConfigItem.h"
#include "pluginsbox.h"
#include "preferences.h"
/*
  construct a new configuration window for the given module
*/
KPreferences::KPreferences(intf_thread_t *p_intf, const char *psz_module_name,
                           QWidget *parent, const QString &caption) :
    KDialogBase ( TreeList, caption, Ok| Apply|Cancel|User1, Ok, parent,
                  _("vlc preferences"), true, false, i18n(_("&Save")) )
{
    module_t *p_parser = NULL;
    vlc_list_t *p_list;
    module_config_t *p_item;
    int i_index;
    QVBox *category_table = NULL;
    QString *category_label;
    this->p_intf = p_intf;
    /* List all modules */
    p_list = vlc_list_find( p_intf, VLC_OBJECT_MODULE, FIND_ANYWHERE );
    for( i_index = 0; i_index < p_list->i_count; i_index++ )
    {
        p_parser = (module_t *)p_list->p_values[i_index].p_object ;
        p_item = p_parser->p_config;
        while( p_item && p_item->i_type != CONFIG_HINT_END )
        {
            switch( p_item->i_type )
            {
            case CONFIG_HINT_CATEGORY:
                /* force the content to the top of the page */
                if ( category_table )
                {
                    QWidget *space = new QWidget( category_table );
                    category_table->setStretchFactor( space, 10 );
                    category_table = NULL;
                }
                
                /*
                 * Now we can start taking care of the new category
                 */
                if( p_item->i_type == CONFIG_HINT_CATEGORY )
                {
                    category_label = new QString( p_item->psz_text );
                    QStringList path;
                    if ( strcmp( p_parser->psz_object_name, "main" ) )
                    {
                        path += _( "Plugins" );
                        path += p_parser->psz_capability;
                        path += p_parser->psz_object_name;
                    }
                    path += *category_label;
                    QFrame *page = addPage( path );
                    QVBoxLayout *toplayout = new QVBoxLayout( page);
                    QScrollView *sv = new QScrollView(page);
                    sv->setResizePolicy(QScrollView::AutoOneFit);
                    sv->setFrameStyle(QScrollView::NoFrame);
                    toplayout->addWidget(sv);
                    category_table = new QVBox(sv->viewport());
                    sv->addChild(category_table);
                    category_table->setSpacing(spacingHint());
                }
                break;
            case CONFIG_ITEM_MODULE:
            {
                vlc_mutex_lock( p_item->p_lock );
                KPluginsBox *item_frame =
                    new KPluginsBox( p_intf, p_item->psz_text,
                                     p_item->psz_value ? p_item->psz_value :"",
                                     category_table,
                                     spacingHint(),
                                     this );
                QConfigItem *ci = new QConfigItem(this,
                                                  p_item->psz_name,
                                                  p_item->i_type,
                                                  p_item->psz_value);
                connect(item_frame, SIGNAL(selectionChanged(const QString &)),
                        ci, SLOT(setValue(const QString &)));
                /* build a list of available plugins */
                for( int i_index = 0; i_index < p_list->i_count; i_index++ )
                {
                    module_t *p_parser = (module_t *)p_list->p_values[i_index].p_object ;
                    if( !strcmp( p_parser->psz_capability,
                                 p_item->psz_type ) )
                    {
                        new QListViewItem(item_frame->getListView(),
                                          p_parser->psz_object_name,
                                          p_parser->psz_longname);
                    }
                }
                vlc_mutex_unlock( p_item->p_lock );
            }
            break;
            case CONFIG_ITEM_STRING:
            {
                QHBox *hb = new QHBox(category_table);
                hb->setSpacing(spacingHint());
                new QLabel(p_item->psz_text, hb);
                /* add input box with default value */
                vlc_mutex_lock( p_item->p_lock );
                QConfigItem *ci = new QConfigItem(this, p_item->psz_name,
                                                  p_item->i_type,
                                                  p_item->psz_value ?
                                                  p_item->psz_value : "");
                if ( p_item->ppsz_list )
                {
                    char **ppsz_list = p_item->ppsz_list;
                    KComboBox *p_combobox = new KComboBox( true, hb );
                    QToolTip::add(p_combobox, p_item->psz_longtext);
                    connect(p_combobox, SIGNAL(activated ( const QString & )),
                            ci, SLOT(setValue( const QString &)));
                    while ( *ppsz_list )
                    {
                        p_combobox->insertItem( *ppsz_list );
                        if ( !strcmp( *ppsz_list, p_item->psz_value ?
                                                  p_item->psz_value : "" ) )
                        {
#if KDE_VERSION_MAJOR >= 3
                            p_combobox->setCurrentText( *ppsz_list );
#else
                            p_combobox->setCurrentItem( p_combobox->count() );
#endif
                        }
                        ppsz_list++;
                    }
                }
                else
                {
                    KLineEdit *kl = new KLineEdit( p_item->psz_value ?
                                                   p_item->psz_value : "", hb);
                    connect(kl, SIGNAL(textChanged ( const QString & )),
                            ci, SLOT(setValue( const QString &)));
                    QToolTip::add(kl, p_item->psz_longtext);
                    kl->setMaxLength(40);
                }
                vlc_mutex_unlock( p_item->p_lock );
            }
            break;
            case CONFIG_ITEM_FILE:
            case CONFIG_ITEM_DIRECTORY:
            {
                QHBox *hb = new QHBox(category_table);
                hb->setSpacing(spacingHint());
                new QLabel(p_item->psz_text, hb);
                /* add input box with default value */
                vlc_mutex_lock( p_item->p_lock );
//            KLineEdit *kl = new KLineEdit( p_item->psz_value ?
//                                           p_item->psz_value : "", hb);
                QConfigItem *ci = new QConfigItem(this, p_item->psz_name,
                                                  p_item->i_type,
                                                  p_item->psz_value ?
                                                  p_item->psz_value : "");
//            QPushButton *bbrowse = new QPushButton( _("Browse"), hb );
                KURLRequester *kfile = new KURLRequester( p_item->psz_value ?
                                                          p_item->psz_value : "",
                                                          hb );
                if ( p_item->i_type == CONFIG_ITEM_DIRECTORY )
                {
                    kfile->fileDialog()->setMode(KFile::Directory|KFile::ExistingOnly|KFile::LocalOnly);
                }
                connect(kfile, SIGNAL(textChanged ( const QString & )),
                        ci, SLOT(setValue( const QString &)));
                QToolTip::add(kfile, p_item->psz_longtext);
                vlc_mutex_unlock( p_item->p_lock );
            }
            break;
            case CONFIG_ITEM_INTEGER:
                /* add input box with default value */
            {
                QHBox *hb = new QHBox(category_table);
                hb->setSpacing(spacingHint());
                new QLabel(p_item->psz_text, hb);
                QConfigItem *ci = new QConfigItem(this, p_item->psz_name,
                                                  p_item->i_type,
                                                  p_item->i_value);
                if ( p_item->i_min == 0 && p_item->i_max == 0 )
                {
                    QSpinBox *item_adj = new QSpinBox(-1, 99999, 1, hb);
                    item_adj->setValue( p_item->i_value );
                    connect(item_adj, SIGNAL(valueChanged( int)),
                            ci, SLOT(setValue(int)));
                    QToolTip::add(item_adj, p_item->psz_longtext);
                }
                else
                {
                    KIntNumInput *p_ii = new KIntNumInput( p_item->i_value, hb );
                    p_ii->setRange( p_item->i_min, p_item->i_max, 1, true ); 
                    connect( p_ii, SIGNAL( valueChanged( int ) ),
                             ci, SLOT( setValue( int ) ) );
                    QToolTip::add( p_ii, p_item->psz_longtext );
                }
            }
            break;
            case CONFIG_ITEM_FLOAT:
            {
                QHBox *hb = new QHBox(category_table);
                hb->setSpacing(spacingHint());
                new QLabel(p_item->psz_text, hb);
                KDoubleNumInput *kdi= new KDoubleNumInput(p_item->f_value, hb);
                if ( p_item->f_min == 0 && p_item->f_max == 0 )
                {
                    kdi->setRange(-1, 99999, 0.01, false);
                }
                else
                {
                    kdi->setRange( p_item->f_min, p_item->f_max, 0.01, true );
                }
                QConfigItem *ci = new QConfigItem(this, p_item->psz_name,
                                                  p_item->i_type,
                                                  p_item->f_value);
                connect(kdi, SIGNAL(valueChanged(double)),
                        ci, SLOT(setValue(double)));
                QToolTip::add(kdi, p_item->psz_longtext);
            }
            break;
            case CONFIG_ITEM_BOOL:
                /* add check button */
            {
                QCheckBox *bool_checkbutton =
                    new QCheckBox(QString(p_item->psz_text), category_table);
                QConfigItem *ci = new QConfigItem(this, p_item->psz_name,
                                                  p_item->i_type,
                                                  p_item->i_value);
                bool_checkbutton->setChecked(p_item->i_value);
                connect(bool_checkbutton, SIGNAL(stateChanged( int)),
                        ci, SLOT(setValue(int)));
                QToolTip::add(bool_checkbutton, p_item->psz_longtext);
            }
            break;
            }
            
            p_item++;
        }
    }
    /* force the content to the top of the page, even on the last page */
    if ( category_table )
    {
        QWidget *space = new QWidget( category_table );
        category_table->setStretchFactor( space, 10 );
        category_table = NULL;
    }
                
    vlc_list_release( p_list );
    exec();
}
/*
  empty destructor, qt takes care of this (I think)
*/
KPreferences::~KPreferences()
{
}
/*
  return true if the give module is configureable
*/
bool KPreferences::isConfigureable(QString module)
{
    module_t *p_parser;
    vlc_list_t *p_list;
    int i_index;
    p_list = vlc_list_find( this->p_intf, VLC_OBJECT_MODULE, FIND_ANYWHERE );
    for( i_index = 0; i_index < p_list->i_count; i_index++ )
    {
        p_parser = (module_t *)p_list->p_values[i_index].p_object ;
        if( !module.compare( p_parser->psz_object_name ) )
        {
            bool ret = p_parser->i_config_items != 0;
            vlc_list_release( p_list );
            return ret;
        }
    }
    vlc_list_release( p_list );
    return false;
}
/*
  run when the Apply button is pressed, and by the methods for the ok
  and save buttons
*/
void KPreferences::slotApply()
{
    QObjectList * l = queryList( "QConfigItem" );
    QObjectListIt it( *l );             // iterate over the config items
    QObject * obj;
    while ( (obj=it.current()) != 0 ) {
        ++it;
        QConfigItem *p_config = (QConfigItem *)obj;
        if ( p_config->changed() )
        {
            msg_Dbg( p_intf, const_cast<char *>(p_config->name()));
            msg_Dbg( p_intf, "%d", p_config->getType());
            switch( p_config->getType() ) {
            case CONFIG_ITEM_DIRECTORY:
            case CONFIG_ITEM_STRING:
            case CONFIG_ITEM_FILE:
            case CONFIG_ITEM_MODULE:
                if (p_config->sValue()) {
                    config_PutPsz( p_intf, p_config->name(),
                                   strdup(p_config->sValue().latin1()));
                }
                else {
                    config_PutPsz( p_intf, p_config->name(), NULL );
                }
                break;
            case CONFIG_ITEM_INTEGER:
            case CONFIG_ITEM_BOOL:
                config_PutInt( p_intf, p_config->name(), p_config->iValue() );
                break;
            case CONFIG_ITEM_FLOAT:
                config_PutFloat( p_intf, p_config->name(), p_config->fValue() );
                break;
            }
            p_config->resetChanged();
        }
    }
    delete l;
}
/*
  run when the Ok button is pressed
*/
void KPreferences::slotOk()
{
    slotApply();
    accept();
}
/*
  run when the save button is pressed
*/
void KPreferences::slotUser1()
{
    slotApply();
    config_SaveConfigFile( p_intf, NULL );
}

						