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Diffstat (limited to 'src/dialogs/tqwizard.cpp')
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diff --git a/src/dialogs/tqwizard.cpp b/src/dialogs/tqwizard.cpp new file mode 100644 index 000000000..2b4c46682 --- /dev/null +++ b/src/dialogs/tqwizard.cpp @@ -0,0 +1,917 @@ +/**************************************************************************** +** +** Implementation of TQWizard class. +** +** Created : 990124 +** +** Copyright (C) 1999-2008 Trolltech ASA. All rights reserved. +** +** This file is part of the dialogs module of the TQt GUI Toolkit. +** +** This file may be used under the terms of the GNU General +** Public License versions 2.0 or 3.0 as published by the Free +** Software Foundation and appearing in the files LICENSE.GPL2 +** and LICENSE.GPL3 included in the packaging of this file. +** Alternatively you may (at your option) use any later version +** of the GNU General Public License if such license has been +** publicly approved by Trolltech ASA (or its successors, if any) +** and the KDE Free TQt Foundation. +** +** Please review the following information to ensure GNU General +** Public Licensing requirements will be met: +** http://trolltech.com/products/qt/licenses/licensing/opensource/. +** If you are unsure which license is appropriate for your use, please +** review the following information: +** http://trolltech.com/products/qt/licenses/licensing/licensingoverview +** or contact the sales department at sales@trolltech.com. +** +** This file may be used under the terms of the Q Public License as +** defined by Trolltech ASA and appearing in the file LICENSE.TQPL +** included in the packaging of this file. Licensees holding valid TQt +** Commercial licenses may use this file in accordance with the TQt +** Commercial License Agreement provided with the Software. +** +** This file is provided "AS IS" with NO WARRANTY OF ANY KIND, +** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted +** herein. +** +**********************************************************************/ + +#include "tqwizard.h" + +#ifndef TQT_NO_WIZARD + +#include "ntqlayout.h" +#include "tqpushbutton.h" +#include "ntqcursor.h" +#include "tqlabel.h" +#include "tqwidgetstack.h" +#include "ntqapplication.h" +#include "tqptrlist.h" +#include "tqpainter.h" +#include "ntqaccel.h" + +/*! \file wizard/wizard.cpp */ +/*! \file wizard/wizard.h */ + +/*! + \class TQWizard tqwizard.h + \brief The TQWizard class provides a framework for wizard dialogs. + + \ingroup abstractwidgets + \ingroup organizers + \ingroup dialogs + \mainclass + + A wizard is a special type of input dialog that consists of a + sequence of dialog pages. A wizard's purpose is to walk the user + through a process step by step. Wizards are useful for complex or + infrequently occurring tasks that people may find difficult to + learn or do. + + TQWizard provides page titles and displays Next, Back, Finish, + Cancel, and Help push buttons, as appropriate to the current + position in the page sequence. These buttons can be + enabled/disabled using setBackEnabled(), setNextEnabled(), + setFinishEnabled() and setHelpEnabled(). + + Create and populate dialog pages that inherit from TQWidget and add + them to the wizard using addPage(). Use insertPage() to add a + dialog page at a certain position in the page sequence. Use + removePage() to remove a page from the page sequence. + + Use currentPage() to retrieve a pointer to the currently displayed + page. page() returns a pointer to the page at a certain position + in the page sequence. + + Use pageCount() to retrieve the total number of pages in the page + sequence. indexOf() will return the index of a page in the page + sequence. + + TQWizard provides functionality to mark pages as appropriate (or + not) in the current context with setAppropriate(). The idea is + that a page may be irrelevant and should be skipped depending on + the data entered by the user on a preceding page. + + It is generally considered good design to provide a greater number + of simple pages with fewer choices rather than a smaller number of + complex pages. + + Example code is available here: \l wizard/wizard.cpp \l wizard/wizard.h + + \img tqwizard.png A TQWizard page + \caption A TQWizard page + +*/ + + +class TQWizardPrivate +{ +public: + struct Page { + Page( TQWidget * widget, const TQString & title ): + w( widget ), t( title ), + backEnabled( TRUE ), nextEnabled( TRUE ), finishEnabled( FALSE ), + helpEnabled( TRUE ), + appropriate( TRUE ) + {} + TQWidget * w; + TQString t; + bool backEnabled; + bool nextEnabled; + bool finishEnabled; + bool helpEnabled; + bool appropriate; + }; + + TQVBoxLayout * v; + Page * current; + TQWidgetStack * ws; + TQPtrList<Page> pages; + TQLabel * title; + TQPushButton * backButton; + TQPushButton * nextButton; + TQPushButton * finishButton; + TQPushButton * cancelButton; + TQPushButton * helpButton; + + TQFrame * hbar1, * hbar2; + +#ifndef TQT_NO_ACCEL + TQAccel * accel; + int backAccel; + int nextAccel; +#endif + + Page * page( const TQWidget * w ) + { + if ( !w ) + return 0; + int i = pages.count(); + while( --i >= 0 && pages.at( i ) && pages.at( i )->w != w ) { } + return i >= 0 ? pages.at( i ) : 0; + } + +}; + + +/*! + Constructs an empty wizard dialog. The \a parent, \a name, \a + modal and \a f arguments are passed to the TQDialog constructor. +*/ + +TQWizard::TQWizard( TQWidget *parent, const char *name, bool modal, + WFlags f ) + : TQDialog( parent, name, modal, f ) +{ + d = new TQWizardPrivate(); + d->current = 0; // not quite true, but... + d->ws = new TQWidgetStack( this, "qt_widgetstack" ); + d->pages.setAutoDelete( TRUE ); + d->title = new TQLabel( this, "title label" ); + + // create in nice tab order + d->nextButton = new TQPushButton( this, "next" ); + d->finishButton = new TQPushButton( this, "finish" ); + d->helpButton = new TQPushButton( this, "help" ); + d->backButton = new TQPushButton( this, "back" ); + d->cancelButton = new TQPushButton( this, "cancel" ); + + d->ws->installEventFilter( this ); + + d->v = 0; + d->hbar1 = 0; + d->hbar2 = 0; + + d->cancelButton->setText( tr( "&Cancel" ) ); + d->backButton->setText( tr( "< &Back" ) ); + d->nextButton->setText( tr( "&Next >" ) ); + d->finishButton->setText( tr( "&Finish" ) ); + d->helpButton->setText( tr( "&Help" ) ); + + d->nextButton->setDefault( TRUE ); + + connect( d->backButton, TQ_SIGNAL(clicked()), + this, TQ_SLOT(back()) ); + connect( d->nextButton, TQ_SIGNAL(clicked()), + this, TQ_SLOT(next()) ); + connect( d->finishButton, TQ_SIGNAL(clicked()), + this, TQ_SLOT(accept()) ); + connect( d->cancelButton, TQ_SIGNAL(clicked()), + this, TQ_SLOT(reject()) ); + connect( d->helpButton, TQ_SIGNAL(clicked()), + this, TQ_SLOT(help()) ); + +#ifndef TQT_NO_ACCEL + d->accel = new TQAccel( this, "arrow-key accel" ); + d->backAccel = d->accel->insertItem( TQt::ALT + TQt::Key_Left ); + d->accel->connectItem( d->backAccel, this, TQ_SLOT(back()) ); + d->nextAccel = d->accel->insertItem( TQt::ALT + TQt::Key_Right ); + d->accel->connectItem( d->nextAccel, this, TQ_SLOT(next()) ); +#endif +} + + +/*! + Destroys the object and frees any allocated resources, including + all pages and controllers. +*/ + +TQWizard::~TQWizard() +{ + delete d; +} + + +/*! + \reimp +*/ + +void TQWizard::show() +{ + if ( !d->current ) { + // No page yet + if ( pageCount() > 0 ) + showPage( d->pages.at( 0 )->w ); + else + showPage( 0 ); + } + + TQDialog::show(); +} + + +/*! + \reimp +*/ + +void TQWizard::setFont( const TQFont & font ) +{ + TQApplication::postEvent( this, new TQEvent( TQEvent::LayoutHint ) ); + TQDialog::setFont( font ); +} + + +/*! + Adds \a page to the end of the page sequence, with the title, \a + title. +*/ + +void TQWizard::addPage( TQWidget * page, const TQString & title ) +{ + if ( !page ) + return; + if ( d->page( page ) ) { +#if defined(QT_CHECK_STATE) + tqWarning( "TQWizard::addPage(): already added %s/%s to %s/%s", + page->className(), page->name(), + className(), name() ); +#endif + return; + } + int i = d->pages.count(); + + if( i > 0 ) + d->pages.at( i - 1 )->nextEnabled = TRUE; + + TQWizardPrivate::Page * p = new TQWizardPrivate::Page( page, title ); + p->backEnabled = ( i > 0 ); + d->ws->addWidget( page, i ); + d->pages.append( p ); +} + +/*! + Inserts \a page at position \a index into the page sequence, with + title \a title. If \a index is -1, the page will be appended to + the end of the wizard's page sequence. +*/ + +void TQWizard::insertPage( TQWidget * page, const TQString & title, int index ) +{ + if ( !page ) + return; + if ( d->page( page ) ) { +#if defined(QT_CHECK_STATE) + tqWarning( "TQWizard::insertPage(): already added %s/%s to %s/%s", + page->className(), page->name(), + className(), name() ); +#endif + return; + } + + if ( index < 0 || index > (int)d->pages.count() ) + index = d->pages.count(); + + if( index > 0 && ( index == (int)d->pages.count() ) ) + d->pages.at( index - 1 )->nextEnabled = TRUE; + + TQWizardPrivate::Page * p = new TQWizardPrivate::Page( page, title ); + p->backEnabled = ( index > 0 ); + p->nextEnabled = ( index < (int)d->pages.count() ); + + d->ws->addWidget( page, index ); + d->pages.insert( index, p ); +} + +/*! + \fn void TQWizard::selected(const TQString&) + + This signal is emitted when the current page changes. The + parameter contains the title of the selected page. +*/ + + +/*! + Makes \a page the current page and emits the selected() signal. + + This virtual function is called whenever a different page is to + be shown, including the first time the TQWizard is shown. + By reimplementing it (and calling TQWizard::showPage()), + you can prepare each page prior to it being shown. +*/ + +void TQWizard::showPage( TQWidget * page ) +{ + TQWizardPrivate::Page * p = d->page( page ); + if ( p ) { + int i; + for( i = 0; i < (int)d->pages.count() && d->pages.at( i ) != p; i++ ); + bool notFirst( FALSE ); + + if( i ) { + i--; + while( ( i >= 0 ) && !notFirst ) { + notFirst |= appropriate( d->pages.at( i )->w ); + i--; + } + } + setBackEnabled( notFirst ); + setNextEnabled( TRUE ); + d->ws->raiseWidget( page ); + d->current = p; + } + + layOut(); + updateButtons(); + emit selected( p ? p->t : TQString::null ); +} + + +/*! + Returns the number of pages in the wizard. +*/ + +int TQWizard::pageCount() const +{ + return d->pages.count(); +} + +/*! + Returns the position of page \a page. If the page is not part of + the wizard -1 is returned. +*/ + +int TQWizard::indexOf( TQWidget* page ) const +{ + TQWizardPrivate::Page * p = d->page( page ); + if ( !p ) return -1; + + return d->pages.find( p ); +} + +/*! + Called when the user clicks the Back button; this function shows + the preceding relevant page in the sequence. + + \sa appropriate() +*/ +void TQWizard::back() +{ + int i = 0; + + while( i < (int)d->pages.count() && d->pages.at( i ) && + d->current && d->pages.at( i )->w != d->current->w ) + i++; + + i--; + while( i >= 0 && ( !d->pages.at( i ) || !appropriate( d->pages.at( i )->w ) ) ) + i--; + + if( i >= 0 ) + if( d->pages.at( i ) ) + showPage( d->pages.at( i )->w ); +} + + +/*! + Called when the user clicks the Next button, this function shows + the next relevant page in the sequence. + + \sa appropriate() +*/ +void TQWizard::next() +{ + int i = 0; + while( i < (int)d->pages.count() && d->pages.at( i ) && + d->current && d->pages.at( i )->w != d->current->w ) + i++; + i++; + while( i <= (int)d->pages.count()-1 && + ( !d->pages.at( i ) || !appropriate( d->pages.at( i )->w ) ) ) + i++; + // if we fell of the end of the world, step back + while ( i > 0 && (i >= (int)d->pages.count() || !d->pages.at( i ) ) ) + i--; + if ( d->pages.at( i ) ) + showPage( d->pages.at( i )->w ); +} + + +/*! + \fn void TQWizard::helpClicked() + + This signal is emitted when the user clicks on the Help button. +*/ + +/*! + Called when the user clicks the Help button, this function emits + the helpClicked() signal. +*/ + +void TQWizard::help() +{ + TQWidget * page = d->ws->visibleWidget(); + if ( !page ) + return; + +#if 0 + TQWizardPage *wpage = ::tqt_cast<TQWizardPage*>(page); + if ( wpage ) + emit wpage->helpClicked(); +#endif + emit helpClicked(); +} + + +void TQWizard::setBackEnabled( bool enable ) +{ + d->backButton->setEnabled( enable ); +#ifndef TQT_NO_ACCEL + d->accel->setItemEnabled( d->backAccel, enable ); +#endif +} + + +void TQWizard::setNextEnabled( bool enable ) +{ + d->nextButton->setEnabled( enable ); +#ifndef TQT_NO_ACCEL + d->accel->setItemEnabled( d->nextAccel, enable ); +#endif +} + + +void TQWizard::setHelpEnabled( bool enable ) +{ + d->helpButton->setEnabled( enable ); +} + + +/*! + \fn void TQWizard::setFinish( TQWidget *, bool ) + \obsolete + + Use setFinishEnabled instead +*/ + +/*! + If \a enable is TRUE, page \a page has a Back button; otherwise \a + page has no Back button. By default all pages have this button. +*/ +void TQWizard::setBackEnabled( TQWidget * page, bool enable ) +{ + TQWizardPrivate::Page * p = d->page( page ); + if ( !p ) + return; + + p->backEnabled = enable; + updateButtons(); +} + + +/*! + If \a enable is TRUE, page \a page has a Next button; otherwise + the Next button on \a page is disabled. By default all pages have + this button. +*/ + +void TQWizard::setNextEnabled( TQWidget * page, bool enable ) +{ + TQWizardPrivate::Page * p = d->page( page ); + if ( !p ) + return; + + p->nextEnabled = enable; + updateButtons(); +} + + +/*! + If \a enable is TRUE, page \a page has a Finish button; otherwise + \a page has no Finish button. By default \e no page has this + button. +*/ +void TQWizard::setFinishEnabled( TQWidget * page, bool enable ) +{ + TQWizardPrivate::Page * p = d->page( page ); + if ( !p ) + return; + + p->finishEnabled = enable; + updateButtons(); +} + + +/*! + If \a enable is TRUE, page \a page has a Help button; otherwise \a + page has no Help button. By default all pages have this button. +*/ +void TQWizard::setHelpEnabled( TQWidget * page, bool enable ) +{ + TQWizardPrivate::Page * p = d->page( page ); + if ( !p ) + return; + + p->helpEnabled = enable; + updateButtons(); +} + + +/*! + Called when the Next button is clicked; this virtual function + returns TRUE if \a page is relevant for display in the current + context; otherwise it is ignored by TQWizard and returns FALSE. The + default implementation returns the value set using + setAppropriate(). The ultimate default is TRUE. + + \warning The last page of the wizard will be displayed if no page + is relevant in the current context. +*/ + +bool TQWizard::appropriate( TQWidget * page ) const +{ + TQWizardPrivate::Page * p = d->page( page ); + return p ? p->appropriate : TRUE; +} + + +/*! + If \a appropriate is TRUE then page \a page is considered relevant + in the current context and should be displayed in the page + sequence; otherwise \a page should not be displayed in the page + sequence. + + \sa appropriate() +*/ +void TQWizard::setAppropriate( TQWidget * page, bool appropriate ) +{ + TQWizardPrivate::Page * p = d->page( page ); + if ( p ) + p->appropriate = appropriate; +} + + +void TQWizard::updateButtons() +{ + if ( !d->current ) + return; + + int i; + for( i = 0; i < (int)d->pages.count() && d->pages.at( i ) != d->current; i++ ); + bool notFirst( FALSE ); + if( i ) { + i--; + while( ( i >= 0 ) && !notFirst ) { + notFirst |= appropriate( d->pages.at( i )->w ); + i--; + } + } + setBackEnabled( d->current->backEnabled && notFirst ); + setNextEnabled( d->current->nextEnabled ); + d->finishButton->setEnabled( d->current->finishEnabled ); + d->helpButton->setEnabled( d->current->helpEnabled ); + + if ( ( d->current->finishEnabled && !d->finishButton->isVisible() ) || + ( d->current->backEnabled && !d->backButton->isVisible() ) || + ( d->current->nextEnabled && !d->nextButton->isVisible() ) || + ( d->current->helpEnabled && !d->helpButton->isVisible() ) ) + layOut(); +} + + +/*! + Returns a pointer to the current page in the sequence. Although + the wizard does its best to make sure that this value is never 0, + it can be if you try hard enough. +*/ + +TQWidget * TQWizard::currentPage() const +{ + return d->ws->visibleWidget(); +} + + +/*! + Returns the title of page \a page. +*/ + +TQString TQWizard::title( TQWidget * page ) const +{ + TQWizardPrivate::Page * p = d->page( page ); + return p ? p->t : TQString::null; +} + +/*! + Sets the title for page \a page to \a title. +*/ + +void TQWizard::setTitle( TQWidget *page, const TQString &title ) +{ + TQWizardPrivate::Page * p = d->page( page ); + if ( p ) + p->t = title; + if ( page == currentPage() ) + d->title->setText( title ); +} + +/*! + \property TQWizard::titleFont + \brief the font used for page titles + + The default is TQApplication::font(). +*/ +TQFont TQWizard::titleFont() const +{ + return d->title->font(); +} + +void TQWizard::setTitleFont( const TQFont & font ) +{ + d->title->setFont( font ); +} + + +/*! + Returns a pointer to the dialog's Back button + + By default, this button is connected to the back() slot, which is + virtual so you can reimplement it in a TQWizard subclass. Use + setBackEnabled() to enable/disable this button. +*/ +TQPushButton * TQWizard::backButton() const +{ + return d->backButton; +} + + +/*! + Returns a pointer to the dialog's Next button + + By default, this button is connected to the next() slot, which is + virtual so you can reimplement it in a TQWizard subclass. Use + setNextEnabled() to enable/disable this button. +*/ +TQPushButton * TQWizard::nextButton() const +{ + return d->nextButton; +} + + +/*! + Returns a pointer to the dialog's Finish button + + By default, this button is connected to the TQDialog::accept() + slot, which is virtual so you can reimplement it in a TQWizard + subclass. Use setFinishEnabled() to enable/disable this button. +*/ +TQPushButton * TQWizard::finishButton() const +{ + return d->finishButton; +} + + +/*! + Returns a pointer to the dialog's Cancel button + + By default, this button is connected to the TQDialog::reject() + slot, which is virtual so you can reimplement it in a TQWizard + subclass. +*/ +TQPushButton * TQWizard::cancelButton() const +{ + return d->cancelButton; +} + + +/*! + Returns a pointer to the dialog's Help button + + By default, this button is connected to the help() slot, which is + virtual so you can reimplement it in a TQWizard subclass. Use + setHelpEnabled() to enable/disable this button. +*/ +TQPushButton * TQWizard::helpButton() const +{ + return d->helpButton; +} + + +/*! + This virtual function is responsible for adding the buttons below + the bottom divider. + + \a layout is the horizontal layout of the entire wizard. +*/ + +void TQWizard::layOutButtonRow( TQHBoxLayout * layout ) +{ + bool hasHelp = FALSE; + bool hasEarlyFinish = FALSE; + + int i = d->pages.count() - 2; + while ( !hasEarlyFinish && i >= 0 ) { + if ( d->pages.at( i ) && d->pages.at( i )->finishEnabled ) + hasEarlyFinish = TRUE; + i--; + } + i = 0; + while ( !hasHelp && i < (int)d->pages.count() ) { + if ( d->pages.at( i ) && d->pages.at( i )->helpEnabled ) + hasHelp = TRUE; + i++; + } + + TQBoxLayout * h = new TQBoxLayout( TQBoxLayout::LeftToRight ); + layout->addLayout( h ); + + if ( hasHelp ) + h->addWidget( d->helpButton ); + else + d->helpButton->hide(); + + h->addStretch( 42 ); + + h->addWidget( d->backButton ); + + h->addSpacing( 6 ); + + if (d->current == d->pages.at( d->pages.count()-1 )) + hasEarlyFinish = FALSE; + + if ( hasEarlyFinish ) { + d->nextButton->show(); + d->finishButton->show(); + h->addWidget( d->nextButton ); + h->addSpacing( 12 ); + h->addWidget( d->finishButton ); + } else if ( d->pages.count() == 0 || + d->current->finishEnabled || + d->current == d->pages.at( d->pages.count()-1 ) ) { + d->nextButton->hide(); + d->finishButton->show(); + h->addWidget( d->finishButton ); + } else { + d->nextButton->show(); + d->finishButton->hide(); + h->addWidget( d->nextButton ); + } + + // if last page is disabled - show finished btn. at lastpage-1 + i = d->pages.count()-1; + if ( i >= 0 && !appropriate( d->pages.at( i )->w ) && + d->current == d->pages.at( d->pages.count()-2 ) ) { + d->nextButton->hide(); + d->finishButton->show(); + h->addWidget( d->finishButton ); + } + + h->addSpacing( 12 ); + h->addWidget( d->cancelButton ); +} + + +/*! + This virtual function is responsible for laying out the title row. + + \a layout is the horizontal layout for the wizard, and \a + title is the title for this page. This function is called every + time \a title changes. +*/ + +void TQWizard::layOutTitleRow( TQHBoxLayout * layout, const TQString & title ) +{ + d->title->setText( title ); + layout->addWidget( d->title, 10 ); +} + + +/* + +*/ + +void TQWizard::layOut() +{ + delete d->v; + d->v = new TQVBoxLayout( this, 6, 0, "top-level layout" ); + + TQHBoxLayout * l; + l = new TQHBoxLayout( 6 ); + d->v->addLayout( l, 0 ); + layOutTitleRow( l, d->current ? d->current->t : TQString::null ); + + if ( ! d->hbar1 ) { + d->hbar1 = new TQFrame( this, "<hr>", 0 ); + d->hbar1->setFrameStyle( TQFrame::Sunken + TQFrame::HLine ); + d->hbar1->setFixedHeight( 12 ); + } + + d->v->addWidget( d->hbar1 ); + + d->v->addWidget( d->ws, 10 ); + + if ( ! d->hbar2 ) { + d->hbar2 = new TQFrame( this, "<hr>", 0 ); + d->hbar2->setFrameStyle( TQFrame::Sunken + TQFrame::HLine ); + d->hbar2->setFixedHeight( 12 ); + } + d->v->addWidget( d->hbar2 ); + + l = new TQHBoxLayout( 6 ); + d->v->addLayout( l ); + layOutButtonRow( l ); + d->v->activate(); +} + + +/*! + \reimp +*/ + +bool TQWizard::eventFilter( TQObject * o, TQEvent * e ) +{ + if ( o == d->ws && e && e->type() == TQEvent::ChildRemoved ) { + TQChildEvent * c = (TQChildEvent*)e; + if ( c->child() && c->child()->isWidgetType() ) + removePage( (TQWidget *)c->child() ); + } + return TQDialog::eventFilter( o, e ); +} + + +/*! + Removes \a page from the page sequence but does not delete the + page. If \a page is currently being displayed, TQWizard will + display the page that precedes it, or the first page if this was + the first page. +*/ + +void TQWizard::removePage( TQWidget * page ) +{ + if ( !page ) + return; + + int i = d->pages.count(); + TQWidget* cp = currentPage(); + while( --i >= 0 && d->pages.at( i ) && d->pages.at( i )->w != page ) { } + if ( i < 0 ) + return; + TQWizardPrivate::Page * p = d->pages.at( i ); + d->pages.removeRef( p ); + d->ws->removeWidget( page ); + + if( cp == page ) { + i--; + if( i < 0 ) + i = 0; + if ( pageCount() > 0 ) + showPage( TQWizard::page( i ) ); + } +} + + +/*! + Returns a pointer to the page at position \a index in the + sequence, or 0 if \a index is out of range. The first page has + index 0. +*/ + +TQWidget* TQWizard::page( int index ) const +{ + if ( index >= pageCount() || index < 0 ) + return 0; + + return d->pages.at( index )->w; +} + +#endif // TQT_NO_WIZARD |