kgantttreeviewrowcontroller.cpp

/*
 * SPDX-FileCopyrightText: 2001-2015 Klaralvdalens Datakonsult AB. All rights reserved.
 *
 * This file is part of the KGantt library.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */
 
#include "kgantttreeviewrowcontroller.h"
#include "kgantttreeviewrowcontroller_p.h"
 
#include <QAbstractProxyModel>
#include <QHeaderView>
#include <QScrollBar>
 
#include <cassert>
 
using namespace KGantt;
 
 
 
TreeViewRowController::TreeViewRowController( QTreeView* tv,
                          QAbstractProxyModel* proxy )
  : _d( new Private )
{
    _d->treeview = static_cast<Private::HackTreeView*>(tv);
    _d->proxy = proxy;
}
 
TreeViewRowController::~TreeViewRowController()
{
    delete _d; _d = nullptr;
}
 
#define d d_func()
 
int TreeViewRowController::headerHeight() const
{
  //return d->treeview->header()->sizeHint().height();
    return d->treeview->viewport()->y()-d->treeview->frameWidth();
}
 
int TreeViewRowController::maximumItemHeight() const
{
    return d->treeview->fontMetrics().height();
}
 
int TreeViewRowController::totalHeight() const
{
    return d->treeview->verticalScrollBar()->maximum()+d->treeview->viewport()->height();
}
 
bool TreeViewRowController::isRowVisible( const QModelIndex& _idx ) const
{
  //qDebug() << _idx.model()<<d->proxy << d->treeview->model();
    const QModelIndex idx = d->proxy->mapToSource( _idx );
    assert( idx.isValid() ? ( idx.model() == d->treeview->model() ):( true ) );
    return d->treeview->visualRect(idx).isValid();
}
 
bool TreeViewRowController::isRowExpanded( const QModelIndex& _idx ) const
{
    const QModelIndex idx = d->proxy->mapToSource( _idx );
    assert( idx.isValid() ? ( idx.model() == d->treeview->model() ):( true ) );
    return d->treeview->isExpanded( idx );
}
 
Span TreeViewRowController::rowGeometry( const QModelIndex& _idx ) const
{
    const QModelIndex idx = d->proxy->mapToSource( _idx );
    assert( idx.isValid() ? ( idx.model() == d->treeview->model() ):( true ) );
    QRect r = d->treeview->visualRect(idx).translated( QPoint( 0, d->treeview->verticalOffset() ) );
    return Span( r.y(), r.height() );
}
 
QModelIndex TreeViewRowController::indexAt( int height ) const
{
  /* using indexAt( QPoint ) won't work here, since it does hit detection
   *   against the actual item text/icon, so we would return wrong values
   *   for items with no text etc.
   *
   *   The code below could cache for performance, but currently it doesn't
   *   seem to be the performance bottleneck at all.
   */
    if ( !d->treeview->model() ) return QModelIndex();
    int y = d->treeview->verticalOffset();
    QModelIndex idx = d->treeview->model()->index( 0, 0, d->treeview->rootIndex() );
    do {
        if ( y >= height ) break;
        y += d->treeview->rowHeight( idx );
        idx = d->treeview->indexBelow( idx );
    } while ( idx.isValid() );
    return d->proxy->mapFromSource( idx );
}
 
QModelIndex TreeViewRowController::indexAbove( const QModelIndex& _idx ) const
{
    const QModelIndex idx = d->proxy->mapToSource( _idx );
    return d->proxy->mapFromSource( d->treeview->indexAbove( idx ) );
}
 
QModelIndex TreeViewRowController::indexBelow( const QModelIndex& _idx ) const
{
    const QModelIndex idx = d->proxy->mapToSource( _idx );
    return d->proxy->mapFromSource( d->treeview->indexBelow( idx ) );
}