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/***************************************************************************
ClipBoard.cpp - the Kwave clipboard
-------------------
begin : Tue Jun 26, 2001
copyright : (C) 2001 by Thomas Eschenbacher
email : Thomas Eschenbacher <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 "config.h"
#include <new>
#include <QApplication>
#include <QClipboard>
#include <QList>
#include <QReadLocker>
#include <QWriteLocker>
#include "libkwave/ClipBoard.h"
#include "libkwave/CodecManager.h"
#include "libkwave/MimeData.h"
#include "libkwave/MultiTrackReader.h"
#include "libkwave/SignalManager.h"
/** static instance of Kwave's clipboard */
static Kwave::ClipBoard g_clipboard;
//***************************************************************************
Kwave::ClipBoard &Kwave::ClipBoard::instance()
{
return g_clipboard;
}
//***************************************************************************
Kwave::ClipBoard::ClipBoard()
:m_tracks(0)
{
}
//***************************************************************************
Kwave::ClipBoard::~ClipBoard()
{
// clear() must have been before, e.g. in the application's destructor !
}
//***************************************************************************
void Kwave::ClipBoard::slotChanged(QClipboard::Mode mode)
{
if (mode != QClipboard::Clipboard) return;
bool data_available = !isEmpty();
// qDebug("=> ClipBoard::clipboardChanged(%s)",
// data_available ? "FULL" : "EMPTY");
emit clipboardChanged(data_available);
}
//***************************************************************************
void Kwave::ClipBoard::copy(QWidget *widget,
Kwave::SignalManager &signal_manager,
const QVector<unsigned int> &track_list,
sample_index_t offset, sample_index_t length)
{
// break if nothing to do
if (!length || !track_list.count()) return;
// get a buffer, implemented as a KwaveMimeData container
Kwave::MimeData *buffer = new(std::nothrow) Kwave::MimeData();
Q_ASSERT(buffer);
if (!buffer) return;
// encode into the mime data container
Kwave::MultiTrackReader src(Kwave::SinglePassForward, signal_manager,
track_list, offset, offset + length - 1);
if (!buffer->encode(widget, src, signal_manager.metaData())) {
// encoding failed, reset to empty
buffer->clear();
delete buffer;
return;
}
// give the buffer to the KDE clipboard
qApp->processEvents();
QApplication::clipboard()->setMimeData(buffer, QClipboard::Clipboard);
}
//***************************************************************************
bool Kwave::ClipBoard::paste(QWidget *widget,
Kwave::SignalManager &signal_manager,
sample_index_t offset, sample_index_t length)
{
Q_ASSERT(!isEmpty());
if (isEmpty()) return false; // clipboard is empty ?
// delete the current selection (with undo)
if (length <= 1) length = 0; // do not paste single samples !
if (length && !signal_manager.deleteRange(offset, length))
return false;
sample_index_t decoded_samples = Kwave::MimeData::decode(
widget,
QApplication::clipboard()->mimeData(QClipboard::Clipboard),
signal_manager,
offset);
if (!decoded_samples) return false;
// set the selection to the inserted range
signal_manager.selectRange(offset, decoded_samples);
return true;
}
//***************************************************************************
void Kwave::ClipBoard::clear()
{
QApplication::clipboard()->clear();
}
//***************************************************************************
bool Kwave::ClipBoard::isEmpty()
{
const QMimeData *mime_data =
QApplication::clipboard()->mimeData(QClipboard::Clipboard);
// no mime data -> empty
if (!mime_data) return true;
// there is a format that we can decode -> not empty
foreach (const QString &format, mime_data->formats())
if (Kwave::CodecManager::canDecode(format)) return false;
// nothing to decode -> empty
return true;
}
//***************************************************************************
//***************************************************************************
#include "moc_ClipBoard.cpp"
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