KDGantt::TreeViewRowController Class Reference

#include <kdgantttreeviewrowcontroller.h>

Inheritance diagram for KDGantt::TreeViewRowController:

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Collaboration diagram for KDGantt::TreeViewRowController:

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List of all members.

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Detailed Description

Definition at line 34 of file kdgantttreeviewrowcontroller.h.

Public Member Functions
int	headerHeight () const
QModelIndex	indexAbove (const QModelIndex &idx) const
QModelIndex	indexAt (int height) const
QModelIndex	indexBelow (const QModelIndex &idx) const
bool	isRowExpanded (const QModelIndex &idx) const
bool	isRowVisible (const QModelIndex &idx) const
int	maximumItemHeight () const
Span	rowGeometry (const QModelIndex &idx) const
int	totalHeight () const
	TreeViewRowController (QTreeView *tv, QAbstractProxyModel *proxy)
virtual	~TreeViewRowController ()

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Constructor & Destructor Documentation

TreeViewRowController::TreeViewRowController	(	QTreeView *	tv,
		QAbstractProxyModel *	proxy
	)

Definition at line 41 of file kdgantttreeviewrowcontroller.cpp.

  : _d( new Private )
{
    _d->treeview = static_cast<Private::HackTreeView*>(tv);
    _d->proxy = proxy;
}

TreeViewRowController::~TreeViewRowController

(

)

[virtual]

Definition at line 49 of file kdgantttreeviewrowcontroller.cpp.

{
    delete _d; _d=0;
}

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Member Function Documentation

int TreeViewRowController::headerHeight

(

)

const [virtual]

Returns:

The height of the header part of the view.

Implement this to control how much space is reserved at the top of the view for a header

Implements KDGantt::AbstractRowController.

Definition at line 56 of file kdgantttreeviewrowcontroller.cpp.

References d.

{
  //return d->treeview->header()->sizeHint().height();
    return d->treeview->viewport()->y()-d->treeview->frameWidth();
}

QModelIndex TreeViewRowController::indexAbove

(

const QModelIndex &

idx

)

const [virtual]

Returns:

The modelindex for the previous row before idx.

See also:

QTreeView::indexAbove

Implements KDGantt::AbstractRowController.

Definition at line 121 of file kdgantttreeviewrowcontroller.cpp.

References d.

{
    const QModelIndex idx = d->proxy->mapToSource( _idx );
    return d->proxy->mapFromSource( d->treeview->indexAbove( idx ) );
}

QModelIndex TreeViewRowController::indexAt

(

int

height

)

const [virtual]

Implements KDGantt::AbstractRowController.

Definition at line 95 of file kdgantttreeviewrowcontroller.cpp.

References d.

{
  /* using indexAt( QPoint ) wont 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;
#if QT_VERSION >= 0x040300
        y += d->treeview->rowHeight( idx );
#else
        // Since TreeViewRowController is NOT using uniform row height
        // we can use this:
        y += d->treeview->indexRowSizeHint( idx );
#endif
        idx = d->treeview->indexBelow( idx );
    } while ( idx.isValid() );
    return d->proxy->mapFromSource( idx );
}

QModelIndex TreeViewRowController::indexBelow

(

const QModelIndex &

idx

)

const [virtual]

Returns:

The modelindex for the next row after idx.

See also:

QTreeView::indexBelow

Implements KDGantt::AbstractRowController.

Definition at line 127 of file kdgantttreeviewrowcontroller.cpp.

References d.

{
    const QModelIndex idx = d->proxy->mapToSource( _idx );
    return d->proxy->mapFromSource( d->treeview->indexBelow( idx ) );
}

bool TreeViewRowController::isRowExpanded

(

const QModelIndex &

idx

)

const [virtual]

Implements KDGantt::AbstractRowController.

Definition at line 80 of file kdgantttreeviewrowcontroller.cpp.

References d.

{
    const QModelIndex idx = d->proxy->mapToSource( _idx );
    assert( idx.isValid() ? ( idx.model() == d->treeview->model() ):( true ) );
    return d->treeview->isExpanded( idx );
}

bool TreeViewRowController::isRowVisible

(

const QModelIndex &

idx

)

const [virtual]

Returns:

true if the row containing index idx is visible in the view.

Implement this to allow KDGantt to optimise how items on screen are created. It is not harmful to always return true here, but the View will not perform optimally.

Implements KDGantt::AbstractRowController.

Definition at line 72 of file kdgantttreeviewrowcontroller.cpp.

References d.

{
  //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();
}

int TreeViewRowController::maximumItemHeight

(

)

const [virtual]

Implements KDGantt::AbstractRowController.

Definition at line 62 of file kdgantttreeviewrowcontroller.cpp.

References d.

{
    return d->treeview->fontMetrics().height();
}

Span TreeViewRowController::rowGeometry

(

const QModelIndex &

idx

)

const [virtual]

Returns:

A Span consisting of the row offset and height for the row containing idx. A simple implementation might look like

 Span MyRowCtrlr::rowGeometry(const QModelIndex& idx)
 {
      return Span(idx.row()*10,10);
 }

Implements KDGantt::AbstractRowController.

Definition at line 87 of file kdgantttreeviewrowcontroller.cpp.

References d, and r.

{
    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() );
}

int TreeViewRowController::totalHeight

(

)

const [virtual]

Returns:

the total height of the rows. For uniformly sized rows that would be number_of_rows*row_height.

Implements KDGantt::AbstractRowController.

Definition at line 67 of file kdgantttreeviewrowcontroller.cpp.

References d.

{
    return d->treeview->verticalScrollBar()->maximum()+d->treeview->viewport()->height();
}

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The documentation for this class was generated from the following files:

• kdgantttreeviewrowcontroller.h
• kdgantttreeviewrowcontroller.cpp

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