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/***************************************************************************
* SelectionItem.cpp - selection item within a SignalView
* -------------------
* begin : Sun Mar 12 2017
* copyright : (C) 2017 by Thomas Eschenbacher
* email : Thomas.Eschenbacher@gmx.de
***************************************************************************/
/***************************************************************************
* *
* This program 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. *
* *
***************************************************************************/
#include <QAction>
#include <QList>
#include "libkwave/Drag.h"
#include "libkwave/MultiTrackReader.h"
#include "libkwave/SignalManager.h"
#include "libkwave/String.h"
#include "libkwave/Utils.h"
#include "libkwave/undo/UndoTransactionGuard.h"
#include "libgui/SelectionItem.h"
#include "libgui/SignalView.h"
//***************************************************************************
Kwave::SelectionItem::SelectionItem(
Kwave::SignalView &view,
Kwave::SignalManager &signal_manager
)
:Kwave::ViewItem(view, signal_manager),
m_first(signal_manager.selection().first()),
m_last(signal_manager.selection().last())
{
}
//***************************************************************************
Kwave::SelectionItem::~SelectionItem()
{
}
//***************************************************************************
Kwave::ViewItem::Flags Kwave::SelectionItem::flags() const
{
return Kwave::ViewItem::CanDragAndDrop;
}
//***************************************************************************
void Kwave::SelectionItem::startDragging()
{
const sample_index_t length = m_signal_manager.selection().length();
if (!length) return;
Kwave::Drag *d = new(std::nothrow) Kwave::Drag(&m_view);
Q_ASSERT(d);
if (!d) return;
const sample_index_t first = m_signal_manager.selection().first();
const sample_index_t last = m_signal_manager.selection().last();
const double rate = m_signal_manager.rate();
const unsigned int bits = m_signal_manager.bits();
Kwave::MultiTrackReader src(Kwave::SinglePassForward, m_signal_manager,
m_signal_manager.selectedTracks(), first, last);
// create the file info
Kwave::MetaDataList meta = m_signal_manager.metaData();
Kwave::FileInfo info(meta);
info.setLength(last - first + 1);
info.setRate(rate);
info.setBits(bits);
info.setTracks(src.tracks());
meta.replace(Kwave::MetaDataList(info));
if (!d->encode(&m_view, src, meta)) {
delete d;
return;
}
// start drag&drop, mode is determined automatically
Kwave::UndoTransactionGuard undo(m_signal_manager, i18n("Drag and Drop"));
Qt::DropAction drop = d->exec(Qt::CopyAction | Qt::MoveAction);
if (drop == Qt::MoveAction) {
// deleting also affects the selection !
const sample_index_t f = m_signal_manager.selection().first();
const sample_index_t l = m_signal_manager.selection().last();
const sample_index_t len = l - f + 1;
// special case: when dropping into the same widget, before
// the previous selection, the previous range has already
// been moved to the right !
sample_index_t src_pos = first;
SignalView *target = qobject_cast<Kwave::SignalView *>(d->target());
if ( (f < src_pos) && target &&
(target->signalManager() == m_view.signalManager()) ) {
src_pos += len;
}
m_signal_manager.deleteRange(src_pos, len,
m_signal_manager.selectedTracks());
// restore the new selection
m_signal_manager.selectRange((first < f) ? (f - len) : f, len);
}
}
//***************************************************************************
//***************************************************************************
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