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ResourceTreeModel: dynamic icons for plugin specific resources + caching

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Added dynamic generation of icons for plugin specific resources by
drawing the logo of the according plugin onto an empty-sheet-icon.
After generation, cache the result so this expensive operation only
has to be done once.

Furthermore also cache pixmaps for individual ResourceItem types for
not having to load and scale pixmaps for each item.

Signed-off-by: Tobias Doerffel <tobias.doerffel@gmail.com>
This commit is contained in:
Tobias Doerffel
2009-07-05 15:58:29 +02:00
parent 09ff1bb9ed
commit bb933e7643
1 changed files with 78 additions and 22 deletions
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100
src/core/ResourceTreeModel.cpp
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@@ -22,9 +22,11 @@
*
*/
#include <QtGui/QPainter>
#include "ResourceTreeModel.h"
#include "embed.h"
#include "plugin.h"
#include "string_pair_drag.h"
@@ -43,32 +45,35 @@ ResourceTreeModel::ResourceTreeModel( ResourceDB * _db, QObject * _parent ) :
QVariant ResourceTreeModel::data( const QModelIndex & _idx, int _role ) const
{
static QHash<ResourceItem::Type, QPixmap> pixmapCache;
if( _idx.isValid() )
{
ResourceTreeItem * item = treeItem( _idx );
ResourceTreeItem * treeItem = this->treeItem( _idx );
ResourceItem * item = treeItem->item();
if( _role == Qt::DisplayRole )
{
if( item->parent() == m_db->topLevelNode() )
if( treeItem->parent() == m_db->topLevelNode() )
{
switch( item->item()->baseDir() )
switch( item->baseDir() )
{
case ResourceItem::BaseWorkingDir:
return tr( "My LMMS files" );
case ResourceItem::BaseDataDir:
return tr( "Shipped LMMS files" );
case ResourceItem::BaseURL:
return item->item()->provider()->url();
return item->provider()->url();
default:
break;
}
}
return item->item()->name();
return item->name();
}
else if( _role == Qt::DecorationRole )
{
if( item->parent() == m_db->topLevelNode() )
if( treeItem->parent() == m_db->topLevelNode() )
{
switch( item->item()->baseDir() )
switch( item->baseDir() )
{
case ResourceItem::BaseWorkingDir:
return embed::getIconPixmap( "mimetypes/folder-workingdir", 24, 24 );
@@ -80,28 +85,79 @@ QVariant ResourceTreeModel::data( const QModelIndex & _idx, int _role ) const
break;
}
}
switch( item->item()->type() )
if( pixmapCache.contains( item->type() ) )
{
return pixmapCache[item->type()];
}
QPixmap pix;
switch( item->type() )
{
case ResourceItem::TypeDirectory:
return embed::getIconPixmap( "mimetypes/folder", 24, 24 );
pix = embed::getIconPixmap( "mimetypes/folder", 24, 24 );
break;
case ResourceItem::TypeSample:
return embed::getIconPixmap( "mimetypes/sample", 24, 24 );
pix = embed::getIconPixmap( "mimetypes/sample", 24, 24 );
break;
case ResourceItem::TypePreset:
pix = embed::getIconPixmap( "mimetypes/preset", 24, 24 );
break;
case ResourceItem::TypePluginSpecificResource:
return embed::getIconPixmap( "mimetypes/preset", 24, 24 );
case ResourceItem::TypeProject:
return embed::getIconPixmap( "project_file", 24, 24 );
case ResourceItem::TypeMidiFile:
return embed::getIconPixmap( "mimetypes/midi", 24, 24 );
case ResourceItem::TypeImage:
return embed::getIconPixmap( "mimetypes/image", 24, 24 );
case ResourceItem::TypePlugin:
return embed::getIconPixmap( "mimetypes/plugin", 24, 24 );
default:
return embed::getIconPixmap( "mimetypes/unknown", 24, 24 );
}
{
// always cache plugin-specific pixmaps as their generation
// is quite expensive compared to hash-lookup
static QHash<QString, QPixmap> pluginPixmapCache;
const QString ext = item->nameExtension();
if( pluginPixmapCache.contains( ext ) )
{
return pluginPixmapCache[ext];
}
// iterate through all plugins
QVector<plugin::descriptor> descriptors;
plugin::getDescriptorsOfAvailPlugins( descriptors );
for( QVector<plugin::descriptor>::iterator it = descriptors.begin();
it != descriptors.end(); ++it )
{
if( it->supportsFileType( ext ) )
{
pix = embed::getIconPixmap( "mimetypes/unknown" );
QPainter p( &pix );
const QPixmap logo = it->logo->pixmap().
scaled( 40, 40, Qt::IgnoreAspectRatio,
Qt::SmoothTransformation );
p.drawPixmap( ( pix.width() - logo.width() ) / 2,
( pix.height() - logo.height() ) / 2,
logo );
p.end();
pix = pix.scaled( 24, 24, Qt::IgnoreAspectRatio,
Qt::SmoothTransformation );
pluginPixmapCache[ext] = pix;
return pix;
}
}
return embed::getIconPixmap( "mimetypes/preset", 24, 24 );
}
case ResourceItem::TypeProject:
pix = embed::getIconPixmap( "project_file", 24, 24 );
break;
case ResourceItem::TypeMidiFile:
pix = embed::getIconPixmap( "mimetypes/midi", 24, 24 );
break;
case ResourceItem::TypeImage:
pix = embed::getIconPixmap( "mimetypes/image", 24, 24 );
break;
case ResourceItem::TypePlugin:
pix = embed::getIconPixmap( "mimetypes/plugin", 24, 24 );
break;
default:
pix = embed::getIconPixmap( "mimetypes/unknown", 24, 24 );
break;
} // end switch( item->type() )
pixmapCache[item->type()] = pix;
return pix;
} // end if( _role == Qt::DecorationRole )
}
return QVariant();
}