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/*
This file is part of the KDE Libraries
Copyright (C) 2006 Tobias Koenig (tokoe@kde.org)
Copyright (C) 2007 Rafael Fernández López (ereslibre@kde.org)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "kpageview.h"
#include "kpageview_p.h"
#include "kpagemodel.h"
#include <kdialog.h>
#include <kiconloader.h>
#include <ktitlewidget.h>
#include <QAbstractItemView>
#include <QGridLayout>
#include <QLabel>
#include <QSize>
#include <QStackedWidget>
#include <QTimer>
void KPageViewPrivate::_k_rebuildGui()
{
// clean up old view
Q_Q(KPageView);
QModelIndex currentLastIndex;
if ( view && view->selectionModel() ) {
QObject::disconnect(view->selectionModel(), SIGNAL(selectionChanged(QItemSelection,QItemSelection)),
q, SLOT(_k_pageSelected(QItemSelection,QItemSelection)));
currentLastIndex = view->selectionModel()->currentIndex();
}
delete view;
view = q->createView();
Q_ASSERT( view );
view->setSelectionBehavior( QAbstractItemView::SelectItems );
view->setSelectionMode( QAbstractItemView::SingleSelection );
if ( model ) {
view->setModel( model );
}
// setup new view
if ( view->selectionModel() ) {
QObject::connect(view->selectionModel(), SIGNAL(selectionChanged(QItemSelection,QItemSelection)), q, SLOT(_k_pageSelected(QItemSelection,QItemSelection)));
if ( currentLastIndex.isValid() )
view->selectionModel()->setCurrentIndex( currentLastIndex, QItemSelectionModel::Select );
else if ( model )
view->selectionModel()->setCurrentIndex( model->index( 0, 0 ), QItemSelectionModel::Select );
}
if (faceType == KPageView::Tabbed) {
stack->setVisible(false);
layout->removeWidget( stack );
} else {
layout->addWidget( stack, 2, 1 );
stack->setVisible(true);
}
titleWidget->setVisible(q->showPageHeader());
Qt::Alignment alignment = q->viewPosition();
if ( alignment & Qt::AlignTop )
layout->addWidget( view, 2, 1 );
else if ( alignment & Qt::AlignRight )
layout->addWidget( view, 1, 2, 2, 1 );
else if ( alignment & Qt::AlignBottom )
layout->addWidget( view, 4, 1 );
else if ( alignment & Qt::AlignLeft )
layout->addWidget( view, 1, 0, 2, 1 );
}
void KPageViewPrivate::updateSelection()
{
/**
* Select the first item in the view if not done yet.
*/
if ( !model )
return;
if ( !view || !view->selectionModel() )
return;
const QModelIndex index = view->selectionModel()->currentIndex();
if ( !index.isValid() )
view->selectionModel()->setCurrentIndex( model->index( 0, 0 ), QItemSelectionModel::Select );
}
void KPageViewPrivate::cleanupPages()
{
/**
* Remove all orphan pages from the stacked widget.
*/
const QList<QWidget*> widgets = collectPages();
for ( int i = 0; i < stack->count(); ++i ) {
QWidget *page = stack->widget( i );
bool found = false;
for ( int j = 0; j < widgets.count(); ++j ) {
if ( widgets[ j ] == page )
found = true;
}
if ( !found )
stack->removeWidget( page );
}
}
QList<QWidget *> KPageViewPrivate::collectPages(const QModelIndex &parentIndex)
{
/**
* Traverse through the model recursive and collect all widgets in
* a list.
*/
QList<QWidget*> retval;
int rows = model->rowCount( parentIndex );
for ( int j = 0; j < rows; ++j ) {
const QModelIndex index = model->index( j, 0, parentIndex );
retval.append( qvariant_cast<QWidget*>( model->data( index, KPageModel::WidgetRole ) ) );
if ( model->rowCount( index ) > 0 ) {
retval += collectPages( index );
}
}
return retval;
}
KPageView::FaceType KPageViewPrivate::detectAutoFace() const
{
if ( !model )
return KPageView::Plain;
/**
* Check whether the model has sub pages.
*/
bool hasSubPages = false;
const int count = model->rowCount();
for ( int i = 0; i < count; ++i ) {
if ( model->rowCount( model->index( i, 0 ) ) > 0 ) {
hasSubPages = true;
break;
}
}
if ( hasSubPages )
return KPageView::Tree;
if ( model->rowCount() > 1 )
return KPageView::List;
return KPageView::Plain;
}
void KPageViewPrivate::_k_modelChanged()
{
if ( !model )
return;
/**
* If the face type is Auto, we rebuild the GUI whenever the layout
* of the model changes.
*/
if (faceType == KPageView::Auto) {
_k_rebuildGui();
// If you discover some crashes use the line below instead...
//QTimer::singleShot(0, q, SLOT(_k_rebuildGui()));
}
/**
* Set the stack to the minimum size of the largest widget.
*/
QSize size = stack->size();
const QList<QWidget*> widgets = collectPages();
for ( int i = 0; i < widgets.count(); ++i ) {
const QWidget *widget = widgets[ i ];
if ( widget )
size = size.expandedTo( widget->minimumSizeHint() );
}
stack->setMinimumSize( size );
updateSelection();
}
void KPageViewPrivate::_k_pageSelected(const QItemSelection &index, const QItemSelection &previous)
{
if ( !model )
return;
// Return if the current Index is not valid
if ( index.indexes().size() != 1 ) {
return;
}
QModelIndex currentIndex = index.indexes().first();
QModelIndex previousIndex;
// The previous index can be invalid
if ( previous.indexes().size() == 1 ) {
previousIndex = previous.indexes().first();
}
if (faceType != KPageView::Tabbed) {
QWidget *widget = qvariant_cast<QWidget*>( model->data( currentIndex, KPageModel::WidgetRole ) );
if ( widget ) {
if ( stack->indexOf( widget ) == -1 ) { // not included yet
stack->addWidget( widget );
}
stack->setCurrentWidget( widget );
} else {
stack->setCurrentWidget( defaultWidget );
}
updateTitleWidget(currentIndex);
}
Q_Q(KPageView);
emit q->currentPageChanged(currentIndex, previousIndex);
}
void KPageViewPrivate::updateTitleWidget(const QModelIndex& index)
{
Q_Q(KPageView);
QString header = model->data( index, KPageModel::HeaderRole ).toString();
if ( header.isNull() ) { //TODO KDE5 remove that ugly logic, see also doxy-comments in KPageWidgetItem::setHeader()
header = model->data( index, Qt::DisplayRole ).toString();
}
const QIcon icon = model->data( index, Qt::DecorationRole ).value<QIcon>();
titleWidget->setPixmap( icon.pixmap( 22, 22 ) );
titleWidget->setText( header );
titleWidget->setVisible(q->showPageHeader());
}
void KPageViewPrivate::_k_dataChanged(const QModelIndex &, const QModelIndex &)
{
/**
* When data has changed we update the header and icon for the currently selected
* page.
*/
if ( !view )
return;
QModelIndex index = view->selectionModel()->currentIndex();
if ( !index.isValid() )
return;
updateTitleWidget( index );
}
KPageViewPrivate::KPageViewPrivate(KPageView *_parent)
: q_ptr(_parent), model(0), faceType(KPageView::Auto),
layout(0), stack(0), titleWidget(0), view(0)
{
}
void KPageViewPrivate::init()
{
Q_Q(KPageView);
layout = new QGridLayout(q);
stack = new KPageStackedWidget(q);
titleWidget = new KTitleWidget(q);
QPixmap emptyPixmap(22, 22);
emptyPixmap.fill(Qt::transparent);
titleWidget->setPixmap(emptyPixmap);
layout->addWidget(titleWidget, 1, 1);
layout->addWidget(stack, 2, 1);
defaultWidget = new QWidget(q);
stack->addWidget(defaultWidget);
// stack should use most space
layout->setColumnStretch(1, 1);
layout->setRowStretch(2, 1);
}
/**
* KPageView Implementation
*/
KPageView::KPageView( QWidget *parent )
: QWidget(parent), d_ptr(new KPageViewPrivate(this))
{
d_ptr->init();
}
KPageView::KPageView(KPageViewPrivate &dd, QWidget *parent)
: QWidget(parent), d_ptr(&dd)
{
d_ptr->init();
}
KPageView::~KPageView()
{
delete d_ptr;
}
void KPageView::setModel(QAbstractItemModel *model)
{
Q_D(KPageView);
// clean up old model
if ( d->model ) {
disconnect(d->model, SIGNAL(layoutChanged()), this, SLOT(_k_modelChanged()));
disconnect(d->model, SIGNAL(dataChanged(QModelIndex,QModelIndex)),
this, SLOT(_k_dataChanged(QModelIndex,QModelIndex)));
}
d->model = model;
if ( d->model ) {
connect(d->model, SIGNAL(layoutChanged()), this, SLOT(_k_modelChanged()));
connect(d->model, SIGNAL(dataChanged(QModelIndex,QModelIndex)),
this, SLOT(_k_dataChanged(QModelIndex,QModelIndex)));
// set new model in navigation view
if ( d->view )
d->view->setModel( model );
}
d->_k_rebuildGui();
}
QAbstractItemModel* KPageView::model() const
{
return d_func()->model;
}
void KPageView::setFaceType( FaceType faceType )
{
Q_D(KPageView);
d->faceType = faceType;
d->_k_rebuildGui();
}
KPageView::FaceType KPageView::faceType() const
{
return d_func()->faceType;
}
void KPageView::setCurrentPage( const QModelIndex &index )
{
Q_D(KPageView);
if ( !d->view || !d->view->selectionModel() )
return;
d->view->selectionModel()->setCurrentIndex( index, QItemSelectionModel::SelectCurrent );
}
QModelIndex KPageView::currentPage() const
{
Q_D(const KPageView);
if ( !d->view || !d->view->selectionModel() )
return QModelIndex();
return d->view->selectionModel()->currentIndex();
}
void KPageView::setItemDelegate( QAbstractItemDelegate *delegate )
{
Q_D(KPageView);
if ( d->view )
d->view->setItemDelegate( delegate );
}
QAbstractItemDelegate* KPageView::itemDelegate() const
{
Q_D(const KPageView);
if ( d->view )
return d->view->itemDelegate();
else
return 0;
}
void KPageView::setDefaultWidget( QWidget *widget )
{
Q_D(KPageView);
Q_ASSERT(widget);
bool isCurrent = (d->stack->currentIndex() == d->stack->indexOf( d->defaultWidget ));
// remove old default widget
d->stack->removeWidget( d->defaultWidget );
delete d->defaultWidget;
// add new default widget
d->defaultWidget = widget;
d->stack->addWidget(d->defaultWidget);
if (isCurrent)
d->stack->setCurrentWidget(d->defaultWidget);
}
QAbstractItemView* KPageView::createView()
{
Q_D(KPageView);
if ( d->faceType == Auto ) {
const FaceType faceType = d->detectAutoFace();
if ( faceType == Plain )
return new KDEPrivate::KPagePlainView( this );
else if ( faceType == List )
return new KDEPrivate::KPageListView( this );
else if ( faceType == Tree )
return new KDEPrivate::KPageTreeView( this );
else // should never happen
return 0;
} else if ( d->faceType == Plain )
return new KDEPrivate::KPagePlainView( this );
else if ( d->faceType == List )
return new KDEPrivate::KPageListView( this );
else if ( d->faceType == Tree )
return new KDEPrivate::KPageTreeView( this );
else if ( d->faceType == Tabbed )
return new KDEPrivate::KPageTabbedView( this );
else
return 0;
}
bool KPageView::showPageHeader() const
{
Q_D(const KPageView);
FaceType faceType = d->faceType;
if ( faceType == Auto )
faceType = d->detectAutoFace();
if ( faceType == Tabbed ) {
return false;
} else {
return !d->titleWidget->text().isEmpty();
}
}
Qt::Alignment KPageView::viewPosition() const
{
Q_D(const KPageView);
FaceType faceType = d->faceType;
if ( faceType == Auto )
faceType = d->detectAutoFace();
if ( faceType == Plain || faceType == Tabbed )
return Qt::AlignTop;
else
return Qt::AlignLeft;
}
#include "kpageview.moc"
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