Tobias Doerffel
7bea6d0e07
Renamed mainWindow to MainWindow and engine::getMainWindow() to engine::mainWindow(). Additionally reduced some header dependencies.
122 lines
2.8 KiB
C++
122 lines
2.8 KiB
C++
/*
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* string_pair_drag.cpp - class stringPairDrag which provides general support
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* for drag'n'drop of string-pairs and which is the base
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* for all drag'n'drop-actions within LMMS
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*
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* Copyright (c) 2005-2009 Tobias Doerffel <tobydox/at/users.sourceforge.net>
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*
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* This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program (see COPYING); if not, write to the
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* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301 USA.
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*
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*/
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#include <QtCore/QMimeData>
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#include <QtGui/QDragEnterEvent>
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#include <QtGui/QDropEvent>
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#include "string_pair_drag.h"
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#include "engine.h"
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#include "MainWindow.h"
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stringPairDrag::stringPairDrag( const QString & _key, const QString & _value,
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const QPixmap & _icon, QWidget * _w ) :
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QDrag( _w )
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{
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if( _icon.isNull() && _w )
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{
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setPixmap( QPixmap::grabWidget( _w ).scaled(
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64, 64,
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Qt::KeepAspectRatio,
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Qt::SmoothTransformation ) );
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}
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else
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{
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setPixmap( _icon );
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}
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setMimeData( createMimeData( _key, _value ) );
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start( Qt::IgnoreAction );
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}
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stringPairDrag::~stringPairDrag()
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{
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// during a drag, we might have lost key-press-events, so reset
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// modifiers of main-win
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if( engine::mainWindow() )
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{
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engine::mainWindow()->clearKeyModifiers();
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}
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}
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QMimeData * stringPairDrag::createMimeData( const QString & _key,
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const QString & _value )
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{
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const QString txt = _key + ":" + _value;
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QMimeData * m = new QMimeData();
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m->setData( mimeType(), txt.toUtf8() );
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return m;
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}
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bool stringPairDrag::processDragEnterEvent( QDragEnterEvent * _dee,
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const QString & _allowed_keys )
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{
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if( !_dee->mimeData()->hasFormat( mimeType() ) )
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{
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return false;
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}
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QString txt = _dee->mimeData()->data( mimeType() );
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if( _allowed_keys.split( ',' ).contains( txt.section( ':', 0, 0 ) ) )
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{
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_dee->acceptProposedAction();
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return true;
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}
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_dee->ignore();
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return false;
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}
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QString stringPairDrag::decodeKey( QDropEvent * _de )
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{
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return QString( _de->mimeData()->
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data( mimeType() ) ).section( ':', 0, 0 );
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}
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QString stringPairDrag::decodeValue( QDropEvent * _de )
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{
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return QString( _de->mimeData()->
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data( mimeType() ) ).section( ':', 1, -1 );
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}
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