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transmission/qt/file-tree.cc

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/*
* This file Copyright (C) 2009-2010 Mnemosyne LLC
*
* This file is licensed by the GPL version 2. Works owned by the
* Transmission project are granted a special exemption to clause 2(b)
* so that the bulk of its code can remain under the MIT license.
* This exemption does not extend to derived works not owned by
* the Transmission project.
*
* $Id$
*/
#include <cassert>
#include <iostream>
#include <QApplication>
#include <QHeaderView>
#include <QPainter>
#include <QResizeEvent>
#include <QStringList>
#include <libtransmission/transmission.h> // priorities
#include "file-tree.h"
#include "hig.h"
#include "torrent.h" // FileList
#include "utils.h" // mime icons
enum
{
COL_NAME,
COL_PROGRESS,
COL_WANTED,
COL_PRIORITY,
NUM_COLUMNS
};
/****
*****
****/
FileTreeItem :: ~FileTreeItem( )
{
assert( myChildren.isEmpty( ) );
if( myParent ) {
const int pos = myParent->myChildren.indexOf( this );
if( pos >= 0 )
myParent->myChildren.removeAt( pos );
else
assert( 0 && "failed to remove" );
}
}
void
FileTreeItem :: appendChild( FileTreeItem * child )
{
child->myParent = this;
myChildren.append( child );
}
FileTreeItem *
FileTreeItem :: child( const QString& filename )
{
foreach( FileTreeItem * c, myChildren )
if( c->name() == filename )
return c;
return 0;
}
int
FileTreeItem :: row( ) const
{
int i(0);
if( myParent )
i = myParent->myChildren.indexOf( const_cast<FileTreeItem*>(this) );
return i;
}
QVariant
FileTreeItem :: data( int column ) const
{
QVariant value;
switch( column ) {
case COL_NAME: value.setValue( name() ); break;
case COL_PROGRESS: value.setValue( progress( ) ); break;
case COL_WANTED: value.setValue( isSubtreeWanted( ) ); break;
case COL_PRIORITY: value.setValue( priorityString( ) ); break;
}
return value;
}
void
FileTreeItem :: getSubtreeSize( uint64_t& have, uint64_t& total ) const
{
have += myHaveSize;
total += myTotalSize;
foreach( const FileTreeItem * i, myChildren )
i->getSubtreeSize( have, total );
}
double
FileTreeItem :: progress( ) const
{
double d(0);
uint64_t have(0), total(0);
getSubtreeSize( have, total );
if( total )
d = have / (double)total;
return d;
}
bool
FileTreeItem :: update( int index, bool wanted, int priority, uint64_t totalSize, uint64_t haveSize )
{
bool changed = false;
if( myIndex != index )
{
myIndex = index;
changed = true;
}
if( myIsWanted != wanted )
{
myIsWanted = wanted;
changed = true;
}
if( myPriority != priority )
{
myPriority = priority;
changed = true;
}
if( myTotalSize != totalSize )
{
myTotalSize = totalSize;
changed = true;
}
if( myHaveSize != haveSize )
{
myHaveSize = haveSize;
changed = true;
}
return changed;
}
QString
FileTreeItem :: priorityString( ) const
{
const int i( priority( ) );
if( i == LOW ) return tr( "Low" );
if( i == HIGH ) return tr( "High" );
if( i == NORMAL ) return tr( "Normal" );
return tr( "Mixed" );
}
int
FileTreeItem :: priority( ) const
{
int i( 0 );
if( myChildren.isEmpty( ) ) switch( myPriority ) {
case TR_PRI_LOW: i |= LOW; break;
case TR_PRI_HIGH: i |= HIGH; break;
default: i |= NORMAL; break;
}
foreach( const FileTreeItem * child, myChildren )
i |= child->priority( );
return i;
}
void
FileTreeItem :: setSubtreePriority( int i, QSet<int>& ids )
{
if( myPriority != i ) {
myPriority = i;
if( myIndex >= 0 )
ids.insert( myIndex );
}
foreach( FileTreeItem * child, myChildren )
child->setSubtreePriority( i, ids );
}
void
FileTreeItem :: twiddlePriority( QSet<int>& ids, int& p )
{
const int old( priority( ) );
if ( old & LOW ) p = TR_PRI_NORMAL;
else if( old & NORMAL ) p = TR_PRI_HIGH;
else p = TR_PRI_LOW;
setSubtreePriority( p, ids );
}
int
FileTreeItem :: isSubtreeWanted( ) const
{
if( myChildren.isEmpty( ) )
return myIsWanted ? Qt::Checked : Qt::Unchecked;
int wanted( -1 );
foreach( const FileTreeItem * child, myChildren ) {
const int childWanted = child->isSubtreeWanted( );
if( wanted == -1 )
wanted = childWanted;
if( wanted != childWanted )
wanted = Qt::PartiallyChecked;
if( wanted == Qt::PartiallyChecked )
return wanted;
}
return wanted;
}
void
FileTreeItem :: setSubtreeWanted( bool b, QSet<int>& ids )
{
if( myIsWanted != b ) {
myIsWanted = b;
if( myIndex >= 0 )
ids.insert( myIndex );
}
foreach( FileTreeItem * child, myChildren )
child->setSubtreeWanted( b, ids );
}
void
FileTreeItem :: twiddleWanted( QSet<int>& ids, bool& wanted )
{
wanted = isSubtreeWanted( ) != Qt::Checked;
setSubtreeWanted( wanted, ids );
}
/***
****
****
***/
FileTreeModel :: FileTreeModel( QObject *parent ):
QAbstractItemModel(parent)
{
rootItem = new FileTreeItem( -1 );
}
FileTreeModel :: ~FileTreeModel( )
{
clear( );
delete rootItem;
}
QVariant
FileTreeModel :: data( const QModelIndex &index, int role ) const
{
QVariant value;
if( index.isValid() && role==Qt::DisplayRole )
{
FileTreeItem *item = static_cast<FileTreeItem*>(index.internalPointer());
value = item->data( index.column( ) );
}
return value;
}
Qt::ItemFlags
FileTreeModel :: flags( const QModelIndex& index ) const
{
int i( Qt::ItemIsSelectable | Qt::ItemIsEnabled );
if( index.column( ) == COL_WANTED )
i |= Qt::ItemIsUserCheckable | Qt::ItemIsTristate;
return (Qt::ItemFlags)i;
}
QVariant
FileTreeModel :: headerData( int column, Qt::Orientation orientation, int role ) const
{
QVariant data;
if( orientation==Qt::Horizontal && role==Qt::DisplayRole ) {
switch( column ) {
case COL_NAME: data.setValue( tr( "File" ) ); break;
case COL_PROGRESS: data.setValue( tr( "Progress" ) ); break;
case COL_WANTED: data.setValue( tr( "Download" ) ); break;
case COL_PRIORITY: data.setValue( tr( "Priority" ) ); break;
default: break;
}
}
return data;
}
QModelIndex
FileTreeModel :: index( int row, int column, const QModelIndex& parent ) const
{
QModelIndex i;
if( !hasIndex( row, column, parent ) )
{
std::cerr << " I don't have this index " << std::endl;
}
else
{
FileTreeItem * parentItem;
if( !parent.isValid( ) )
parentItem = rootItem;
else
parentItem = static_cast<FileTreeItem*>(parent.internalPointer());
FileTreeItem * childItem = parentItem->child( row );
if( childItem )
i = createIndex( row, column, childItem );
//std::cerr << "FileTreeModel::index(row("<<row<<"),col("<<column<<"),parent("<<qPrintable(parentItem->name())<<")) is returning " << qPrintable(childItem->name()) << ": internalPointer " << i.internalPointer() << " row " << i.row() << " col " << i.column() << std::endl;
}
return i;
}
QModelIndex
FileTreeModel :: parent( const QModelIndex& child ) const
{
return parent( child, 0 ); // QAbstractItemModel::parent() wants col 0
}
QModelIndex
FileTreeModel :: parent( const QModelIndex& child, int column ) const
{
if( !child.isValid( ) )
return QModelIndex( );
FileTreeItem * childItem = static_cast<FileTreeItem*>(child.internalPointer());
return indexOf( childItem->parent( ), column );
}
int
FileTreeModel :: rowCount( const QModelIndex& parent ) const
{
FileTreeItem * parentItem;
if( !parent.isValid( ) )
parentItem = rootItem;
else
parentItem = static_cast<FileTreeItem*>(parent.internalPointer());
return parentItem->childCount();
}
int
FileTreeModel :: columnCount( const QModelIndex &parent ) const
{
Q_UNUSED( parent );
return 4;
}
QModelIndex
FileTreeModel :: indexOf( FileTreeItem * item, int column ) const
{
if( !item || item==rootItem )
return QModelIndex( );
return createIndex( item->row( ), column, item );
}
void
FileTreeModel :: clearSubtree( const QModelIndex& top )
{
while( hasChildren( top ) )
clearSubtree( index( 0, 0, top ) );
delete static_cast<FileTreeItem*>(top.internalPointer());
}
void
FileTreeModel :: clear( )
{
clearSubtree( QModelIndex( ) );
reset( );
}
void
FileTreeModel :: addFile( int index,
const QString & filename,
bool wanted,
int priority,
uint64_t size,
uint64_t have,
QList<QModelIndex> & rowsAdded )
{
FileTreeItem * i( rootItem );
foreach( QString token, filename.split( "/" ) )
{
FileTreeItem * child( i->child( token ) );
if( !child )
{
QModelIndex parentIndex( indexOf( i, 0 ) );
const int n( i->childCount( ) );
beginInsertRows( parentIndex, n, n );
i->appendChild(( child = new FileTreeItem( -1, token )));
endInsertRows( );
rowsAdded.append( indexOf( child, 0 ) );
}
i = child;
}
if( i != rootItem )
if( i->update( index, wanted, priority, size, have ) )
dataChanged( indexOf( i, 0 ), indexOf( i, NUM_COLUMNS-1 ) );
}
void
FileTreeModel :: parentsChanged( const QModelIndex& index, int column )
{
QModelIndex walk = index;
for( ;; ) {
walk = parent( walk, column );
if( !walk.isValid( ) )
break;
dataChanged( walk, walk );
}
}
void
FileTreeModel :: subtreeChanged( const QModelIndex& index, int column )
{
const int childCount = rowCount( index );
if( !childCount )
return;
// tell everyone that this tier changed
dataChanged( index.child(0,column), index.child(childCount-1,column) );
// walk the subtiers
for( int i=0; i<childCount; ++i )
subtreeChanged( index.child(i,column), column );
}
void
FileTreeModel :: clicked( const QModelIndex& index )
{
const int column( index.column( ) );
if( !index.isValid( ) )
return;
if( column == COL_WANTED )
{
FileTreeItem * item( static_cast<FileTreeItem*>(index.internalPointer()));
bool want;
QSet<int> fileIds;
item->twiddleWanted( fileIds, want );
emit wantedChanged( fileIds, want );
dataChanged( index, index );
parentsChanged( index, column );
subtreeChanged( index, column );
}
else if( column == COL_PRIORITY )
{
FileTreeItem * item( static_cast<FileTreeItem*>(index.internalPointer()));
int priority;
QSet<int>fileIds;
item->twiddlePriority( fileIds, priority );
emit priorityChanged( fileIds, priority );
dataChanged( index, index );
parentsChanged( index, column );
subtreeChanged( index, column );
}
}
/****
*****
****/
void
FileTreeDelegate :: paint( QPainter * painter,
const QStyleOptionViewItem & option,
const QModelIndex & index ) const
{
const int column( index.column( ) );
if( ( column != COL_PROGRESS ) && ( column != COL_WANTED ) && ( column != COL_NAME ) )
{
QItemDelegate::paint(painter, option, index);
return;
}
QStyle * style( QApplication :: style( ) );
if( option.state & QStyle::State_Selected )
painter->fillRect( option.rect, option.palette.highlight( ) );
painter->save();
if( option.state & QStyle::State_Selected )
painter->setBrush(option.palette.highlightedText());
if( column == COL_NAME )
{
// draw the file icon
static const int iconSize( style->pixelMetric( QStyle :: PM_SmallIconSize ) );
const QRect iconArea( option.rect.x(),
option.rect.y() + (option.rect.height()-iconSize)/2,
iconSize, iconSize );
QIcon icon;
if( index.model()->hasChildren( index ) )
icon = style->standardIcon( QStyle::StandardPixmap( QStyle::SP_DirOpenIcon ) );
else
icon = Utils :: guessMimeIcon( index.model()->data(index).toString( ) );
icon.paint( painter, iconArea, Qt::AlignCenter, QIcon::Normal, QIcon::On );
// draw the name
QStyleOptionViewItem tmp( option );
tmp.rect.setWidth( option.rect.width( ) - iconArea.width( ) - HIG::PAD_SMALL );
tmp.rect.moveRight( option.rect.right( ) );
QItemDelegate::paint( painter, tmp, index );
}
else if( column == COL_PROGRESS )
{
QStyleOptionProgressBar p;
p.state = option.state | QStyle::State_Small;
p.direction = QApplication::layoutDirection();
p.rect = option.rect;
p.rect.setSize( QSize( option.rect.width()-2, option.rect.height()-2 ) );
p.rect.moveCenter( option.rect.center( ) );
p.fontMetrics = QApplication::fontMetrics();
p.minimum = 0;
p.maximum = 100;
p.textAlignment = Qt::AlignCenter;
p.textVisible = true;
p.progress = (int)(100.0*index.model()->data(index).toDouble());
p.text = QString( ).sprintf( "%d%%", p.progress );
style->drawControl( QStyle::CE_ProgressBar, &p, painter );
}
else if( column == COL_WANTED )
{
QStyleOptionButton o;
o.state = option.state;
o.direction = QApplication::layoutDirection();
o.rect.setSize( QSize( 20, option.rect.height( ) ) );
o.rect.moveCenter( option.rect.center( ) );
o.fontMetrics = QApplication::fontMetrics();
switch( index.model()->data(index).toInt() ) {
case Qt::Unchecked: o.state |= QStyle::State_Off; break;
case Qt::Checked: o.state |= QStyle::State_On; break;
default: o.state |= QStyle::State_NoChange;break;
}
style->drawControl( QStyle::CE_CheckBox, &o, painter );
}
painter->restore( );
}
/****
*****
*****
*****
****/
FileTreeView :: FileTreeView( QWidget * parent ):
QTreeView( parent ),
myModel( this ),
myDelegate( this )
{
setAlternatingRowColors( true );
setSelectionBehavior( QAbstractItemView::SelectRows );
setSelectionMode( QAbstractItemView::ExtendedSelection );
setModel( &myModel );
setItemDelegate( &myDelegate );
setHorizontalScrollBarPolicy( Qt::ScrollBarAlwaysOff );
installEventFilter( this );
for( int i=0; i<=NUM_COLUMNS; ++i )
header()->setResizeMode( i, QHeaderView::Fixed );
connect( this, SIGNAL(clicked(const QModelIndex&)),
&myModel, SLOT(clicked(const QModelIndex&)));
connect( &myModel, SIGNAL(priorityChanged(const QSet<int>&, int)),
this, SIGNAL(priorityChanged(const QSet<int>&, int)));
connect( &myModel, SIGNAL(wantedChanged(const QSet<int>&, bool)),
this, SIGNAL(wantedChanged(const QSet<int>&, bool)));
}
bool
FileTreeView :: eventFilter( QObject * o, QEvent * event )
{
if( o != this )
return false;
// this is kind of a hack to get the last three columns be the
// right size, and to have the filename column use whatever
// space is left over...
if( event->type() == QEvent::Resize )
{
QResizeEvent * r = dynamic_cast<QResizeEvent*>(event);
int left = r->size().width();
const QFontMetrics fontMetrics( font( ) );
for( int column=0; column<NUM_COLUMNS; ++column ) {
if( column == COL_NAME )
continue;
if( isColumnHidden( column ) )
continue;
const QString header = myModel.headerData( column, Qt::Horizontal ).toString( ) + " ";
const int width = fontMetrics.size( 0, header ).width( );
setColumnWidth( column, width );
left -= width;
}
left -= 20; // not sure why this is necessary. it works in different themes + font sizes though...
setColumnWidth( COL_NAME, std::max(left,0) );
return false;
}
return false;
}
void
FileTreeView :: update( const FileList& files )
{
foreach( const TrFile file, files ) {
QList<QModelIndex> added;
myModel.addFile( file.index, file.filename, file.wanted, file.priority, file.size, file.have, added );
foreach( QModelIndex i, added )
expand( i );
}
}
void
FileTreeView :: clear( )
{
myModel.clear( );
}
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