File indexing completed on 2024-04-21 04:50:16

 /*
     SPDX-FileCopyrightText: 2008 Sebastian Trueg <trueg@k3b.org>
     SPDX-FileCopyrightText: 2010 Michal Malek <michalm@jabster.pl>
     SPDX-FileCopyrightText: 1998-2008 Sebastian Trueg <trueg@k3b.org>
     SPDX-License-Identifier: GPL-2.0-or-later
 */
 
 #include "k3bviewcolumnadjuster.h"
 
 #include <QAbstractItemModel>
 #include <QDebug>
 #include <QEvent>
 #include <QHash>
 #include <QList>
 #include <QSet>
 #include <QTreeView>
 #include <QHeaderView>
 
 
 class K3b::ViewColumnAdjuster::Private
 {
 public:
     Private( ViewColumnAdjuster* parent )
         : view( 0 ),
           q( parent ) {
     }
 
     int columnSizeHint( int col );
 
     void _k_adjustColumns();
 
     QTreeView* view;
     QSet<int> fixedColumns;
     QHash<int, int> margins;
 
 private:
     ViewColumnAdjuster* q;
 };
 
 
 void K3b::ViewColumnAdjuster::Private::_k_adjustColumns()
 {
     if ( q->receivers( SIGNAL(columnsNeedAjusting()) ) ) {
         emit q->columnsNeedAjusting();
     }
     else {
         q->adjustColumns();
     }
 }
 
 
 int K3b::ViewColumnAdjuster::Private::columnSizeHint( int col )
 {
     int w = static_cast<QAbstractItemView*>( view )->sizeHintForColumn( col );
     QModelIndex firstRow = view->model()->index( 0, col );
     if ( firstRow.isValid() && firstRow.flags().testFlag( Qt::ItemIsUserCheckable ) ) {
         w += 10; // HACK
     }
     if ( !view->header()->isHidden() ) {
         w = qMax( w, view->header()->sectionSizeHint( col ) );
     }
     return w;
 }
 
 
 K3b::ViewColumnAdjuster::ViewColumnAdjuster( QObject* parent )
     : QObject( parent ),
       d( new Private(this) )
 {
 }
 
 
 K3b::ViewColumnAdjuster::ViewColumnAdjuster( QTreeView* parent )
     : QObject( parent ),
       d( new Private(this) )
 {
     setView( parent );
 }
 
 
 K3b::ViewColumnAdjuster::~ViewColumnAdjuster()
 {
     delete d;
 }
 
 
 void K3b::ViewColumnAdjuster::setView( QTreeView* view )
 {
     if ( d->view != view ) {
         if ( d->view ) {
             d->view->removeEventFilter( this );
             d->view->model()->disconnect( this );
         }
         d->view = view;
         if ( d->view ) {
             d->view->header()->setSectionResizeMode( QHeaderView::Fixed );
             d->view->installEventFilter( this );
             connect( d->view->model(), SIGNAL(modelReset()), SLOT(_k_adjustColumns()) );
             connect( d->view->model(), SIGNAL(dataChanged(QModelIndex,QModelIndex)), SLOT(_k_adjustColumns()) );
             connect( d->view->model(), SIGNAL(headerDataChanged(Qt::Orientation,int,int)), SLOT(_k_adjustColumns()) );
             connect( d->view->model(), SIGNAL(rowsInserted(QModelIndex,int,int)), SLOT(_k_adjustColumns()) );
             connect( d->view->model(), SIGNAL(rowsRemoved(QModelIndex,int,int)), SLOT(_k_adjustColumns()) );
             connect( d->view->model(), SIGNAL(columnsInserted(QModelIndex,int,int)), SLOT(_k_adjustColumns()) );
             connect( d->view->model(), SIGNAL(columnsRemoved(QModelIndex,int,int)), SLOT(_k_adjustColumns()) );
             d->view->header()->setSectionResizeMode( QHeaderView::Interactive );
         }
     }
 }
 
 
 void K3b::ViewColumnAdjuster::addFixedColumn( int col )
 {
     d->fixedColumns << col;
 }
 
 
 void K3b::ViewColumnAdjuster::setColumnMargin( int col, int margin )
 {
     d->margins[col] = margin;
 }
 
 
 int K3b::ViewColumnAdjuster::columnMargin( int column ) const
 {
     if ( d->margins.contains( column ) ) {
         return d->margins[column];
     }
     else {
         return 0;
     }
 }
 
 
 bool K3b::ViewColumnAdjuster::eventFilter(QObject* watched, QEvent* event)
 {
     if (watched == d->view) {
         if (event->type() == QEvent::Resize || event->type() == QEvent::UpdateLater) {
             d->_k_adjustColumns();
         }
     }
 
     // we never "eat" an event
     return false;
 }
 
 
 int K3b::ViewColumnAdjuster::columnSizeHint( int col ) const
 {
     return d->columnSizeHint( col );
 }
 
 
 void K3b::ViewColumnAdjuster::adjustColumns()
 {
     // fixed sizes
     int x = 0;
     QList<int> otherCols;
     for ( int i = 0; i < d->view->model()->columnCount( d->view->rootIndex() ); ++i ) {
         if ( d->fixedColumns.contains( i ) ) {
             int w = d->columnSizeHint( i ) + columnMargin( i );
             d->view->setColumnWidth( i, w );
             x += w;
         }
         else {
             otherCols << i;
         }
     }
 
     if ( otherCols.count() ) {
         QList<int> otherColSizes;
         int xx = 0;
         int widthLeft = d->view->viewport()->contentsRect().width() - x;
         int max = widthLeft / otherCols.count();
         for ( int i = 0; i < otherCols.count(); ++i ) {
             int sh = d->columnSizeHint( otherCols[i] ) + columnMargin( otherCols[i] );
             otherColSizes << qMin( sh, max );
             xx += qMin( sh, max );
         }
 
         // do we have something left
         for ( int i = 0; i < otherCols.count(); ++i ) {
             d->view->setColumnWidth( otherCols[i], qMax( 0, otherColSizes[i] + ( widthLeft-xx )/otherColSizes.count() ) );
         }
     }
 }
 
 #include "moc_k3bviewcolumnadjuster.cpp"