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/******************************************************************************
*
* Copyright (C) 2002 Hugo PEREIRA <mailto: hugo.pereira@free.fr>
*
* This is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* This software is distributed in the hope that it will be useful, but WITHOUT
* Any WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*
*******************************************************************************/
#include "ColumnSelectionMenu.h"
#include "Debug.h"
#include "TreeView.h"
#include <QHeaderView>
//_____________________________________________________
ColumnSelectionMenu::ColumnSelectionMenu( QWidget* parent, QTreeView* target, const QString& title ):
QMenu( parent ),
Counter( "ColumnSelectionMenu" ),
target_( target )
{
Debug::Throw( "ColumnSelectionMenu::ColumnSelectionMenu.\n" );
setTitle( title );
connect( this, SIGNAL(aboutToShow()), SLOT(_updateActions()) );
connect( this, SIGNAL(triggered(QAction*)), SLOT(_updateSelectedColumns(QAction*)) );
}
//_____________________________________________________
void ColumnSelectionMenu::_updateActions()
{
Debug::Throw( "ColumnSelectionMenu::_updateActions.\n" );
// clear existing actions
for( auto&& iter = actions_.begin(); iter != actions_.end(); ++iter )
{ delete iter.key(); }
delete currentColumnAction_;
currentColumnAction_ = nullptr;
actions_.clear();
// check if the menu already has actions.
QList<QAction*> actions( ColumnSelectionMenu::actions() );
QAction *firstAction( actions.isEmpty() ? nullptr:actions.front() );
// retrieve parent header.
QHeaderView* header( target_->header() );
Q_ASSERT( header );
// try cast to treeview
TreeView* treeView( qobject_cast<TreeView*>( target_ ) );
if( currentColumn_ >= 0 )
{
// retrieve column name
QString columnName( header->model()->headerData( currentColumn_, Qt::Horizontal, Qt::DisplayRole ).toString() );
if( columnName.isNull() || columnName.isEmpty() ) columnName = QString( tr("Column %1") ).arg( currentColumn_+1 );
// disable/hide action for locked columns
if( !( treeView && treeView->isColumnVisibilityLocked( currentColumn_ ) ) )
{
currentColumnAction_ = new QAction( tr( "Hide Column '%1'" ).arg( columnName ), this );
connect( currentColumnAction_, SIGNAL(triggered()), SLOT(_hideCurrentColumn()) );
insertAction( firstAction, currentColumnAction_ );
insertSeparator( firstAction );
}
}
// loop over columns in header
int visibleColumns(0);
for( int index=0; index < header->count(); index++ )
{
// retrieve column name
QString columnName( header->model()->headerData( index, Qt::Horizontal, Qt::DisplayRole ).toString() );
if( columnName.isNull() || columnName.isEmpty() ) columnName = QString( tr("Column %1") ).arg( index+1 );
QAction* action = new QAction( columnName, this );
action->setCheckable( true );
action->setChecked( !target_->isColumnHidden( index ) );
// disable/hide action for locked columns
if( treeView && treeView->isColumnVisibilityLocked( index ) )
{
if( action->isChecked() ) action->setEnabled( false );
else action->setVisible( false );
}
if( !target_->isColumnHidden( index ) ) visibleColumns++;
insertAction( firstAction, action );
actions_.insert( action, index );
}
// if only one column is visible, disable corresponding action
if( visibleColumns == 1 )
{
for( auto&& iter = actions_.begin(); iter != actions_.end(); ++iter )
{ if( iter.key()->isChecked() ) iter.key()->setEnabled( false ); }
}
}
//______________________________________________________________________________
void ColumnSelectionMenu::_hideCurrentColumn()
{
Debug::Throw( "ColumnSelectionMenu::_hideCurrentColumn.\n" );
// update current column visibility
if( currentColumn_ >= 0 )
{ target_->setColumnHidden( currentColumn_, true ); }
// save
if( TreeView* treeView = qobject_cast<TreeView*>( target_ ) )
{ treeView->saveMask(); }
}
//______________________________________________________________________________
void ColumnSelectionMenu::_updateSelectedColumns( QAction* action )
{
Debug::Throw( "ColumnSelectionMenu::_updateSelectedColumns.\n" );
// retrieve index
auto&& iter = actions_.find( action );
if( iter == actions_.end() ) return;
// set column visibility
target_->setColumnHidden( iter.value(), !iter.key()->isChecked() );
if( auto treeView = qobject_cast<TreeView*>( target_ ) )
{ treeView->saveMask(); }
}
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