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ClipView.cpp
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ClipView.cpp
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/*
* ClipView.cpp - implementation of ClipView class
*
* Copyright (c) 2004-2014 Tobias Doerffel <tobydox/at/users.sourceforge.net>
*
* This file is part of LMMS - https://lmms.io
*
* 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.
*
* This program 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 (see COPYING); if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA.
*
*/
#include "ClipView.h"
#include <set>
#include <cassert>
#include <QMenu>
#include <QMouseEvent>
#include <QPainter>
#include "AutomationClip.h"
#include "Clipboard.h"
#include "ColorChooser.h"
#include "ComboBoxModel.h"
#include "DataFile.h"
#include "Engine.h"
#include "embed.h"
#include "GuiApplication.h"
#include "InstrumentTrack.h"
#include "InstrumentTrackView.h"
#include "MidiClip.h"
#include "MidiClipView.h"
#include "Note.h"
#include "PatternClip.h"
#include "PatternStore.h"
#include "SampleClip.h"
#include "Song.h"
#include "SongEditor.h"
#include "StringPairDrag.h"
#include "TextFloat.h"
#include "TrackContainer.h"
#include "TrackContainerView.h"
#include "TrackView.h"
namespace lmms::gui
{
/*! The width of the resize grip in pixels
*/
const int RESIZE_GRIP_WIDTH = 4;
/*! A pointer for that text bubble used when moving segments, etc.
*
* In a number of situations, LMMS displays a floating text bubble
* beside the cursor as you move or resize elements of a track about.
* This pointer keeps track of it, as you only ever need one at a time.
*/
TextFloat * ClipView::s_textFloat = nullptr;
/*! \brief Create a new ClipView
*
* Creates a new clip view for the given clip in the given track view.
*
* \param _clip The clip to be displayed
* \param _tv The track view that will contain the new object
*/
ClipView::ClipView( Clip * clip,
TrackView * tv ) :
selectableObject( tv->getTrackContentWidget() ),
ModelView( nullptr, this ),
m_trackView( tv ),
m_initialClipPos( TimePos(0) ),
m_initialClipEnd( TimePos(0) ),
m_clip( clip ),
m_action( Action::None ),
m_initialMousePos( QPoint( 0, 0 ) ),
m_initialMouseGlobalPos( QPoint( 0, 0 ) ),
m_initialOffsets( QVector<TimePos>() ),
m_hint( nullptr ),
m_mutedColor( 0, 0, 0 ),
m_mutedBackgroundColor( 0, 0, 0 ),
m_selectedColor( 0, 0, 0 ),
m_textColor( 0, 0, 0 ),
m_textShadowColor( 0, 0, 0 ),
m_patternClipBackground( 0, 0, 0 ),
m_gradient( true ),
m_mouseHotspotHand( 0, 0 ),
m_mouseHotspotKnife( 0, 0 ),
m_cursorHand( QCursor( embed::getIconPixmap( "hand" ) ) ),
m_cursorKnife( QCursor( embed::getIconPixmap( "cursor_knife" ) ) ),
m_cursorSetYet( false ),
m_needsUpdate( true )
{
if( s_textFloat == nullptr )
{
s_textFloat = new TextFloat;
s_textFloat->setPixmap( embed::getIconPixmap( "clock" ) );
}
setAttribute( Qt::WA_OpaquePaintEvent, true );
setAttribute( Qt::WA_DeleteOnClose, true );
setFocusPolicy( Qt::StrongFocus );
setCursor( m_cursorHand );
move( 0, 0 );
show();
setFixedHeight( tv->getTrackContentWidget()->height() - 1);
setAcceptDrops( true );
setMouseTracking( true );
connect( m_clip, SIGNAL(lengthChanged()),
this, SLOT(updateLength()));
connect(getGUI()->songEditor()->m_editor, &SongEditor::pixelsPerBarChanged, this, &ClipView::updateLength);
connect( m_clip, SIGNAL(positionChanged()),
this, SLOT(updatePosition()));
connect( m_clip, SIGNAL(destroyedClip()), this, SLOT(close()));
setModel( m_clip );
connect(m_clip, SIGNAL(colorChanged()), this, SLOT(update()));
connect(m_trackView->getTrack(), &Track::colorChanged, this, [this]
{
// redraw if clip uses track color
if (!m_clip->color().has_value()) { update(); }
});
m_trackView->getTrackContentWidget()->addClipView( this );
updateLength();
updatePosition();
}
/*! \brief Destroy a ClipView
*
* Destroys the given ClipView.
*
*/
ClipView::~ClipView()
{
delete m_hint;
// we have to give our track-container the focus because otherwise the
// op-buttons of our track-widgets could become focus and when the user
// presses space for playing song, just one of these buttons is pressed
// which results in unwanted effects
m_trackView->trackContainerView()->setFocus();
}
/*! \brief Update a ClipView
*
* Clip's get drawn only when needed,
* and when a Clip is updated,
* it needs to be redrawn.
*
*/
void ClipView::update()
{
if( !m_cursorSetYet )
{
m_cursorHand = QCursor( embed::getIconPixmap( "hand" ), m_mouseHotspotHand.width(), m_mouseHotspotHand.height() );
m_cursorKnife = QCursor( embed::getIconPixmap( "cursor_knife" ), m_mouseHotspotKnife.width(), m_mouseHotspotKnife.height() );
setCursor( m_cursorHand );
m_cursorSetYet = true;
}
if( fixedClips() )
{
updateLength();
}
m_needsUpdate = true;
selectableObject::update();
}
/*! \brief Does this ClipView have a fixed Clip?
*
* Returns whether the containing trackView has fixed
* Clips.
*
* \todo In what circumstance are they fixed?
*/
bool ClipView::fixedClips()
{
return m_trackView->trackContainerView()->fixedClips();
}
// qproperty access functions, to be inherited & used by Clipviews
//! \brief CSS theming qproperty access method
QColor ClipView::mutedColor() const
{ return m_mutedColor; }
QColor ClipView::mutedBackgroundColor() const
{ return m_mutedBackgroundColor; }
QColor ClipView::selectedColor() const
{ return m_selectedColor; }
QColor ClipView::textColor() const
{ return m_textColor; }
QColor ClipView::textBackgroundColor() const
{
return m_textBackgroundColor;
}
QColor ClipView::textShadowColor() const
{ return m_textShadowColor; }
QColor ClipView::patternClipBackground() const
{ return m_patternClipBackground; }
bool ClipView::gradient() const
{ return m_gradient; }
//! \brief CSS theming qproperty access method
void ClipView::setMutedColor( const QColor & c )
{ m_mutedColor = QColor( c ); }
void ClipView::setMutedBackgroundColor( const QColor & c )
{ m_mutedBackgroundColor = QColor( c ); }
void ClipView::setSelectedColor( const QColor & c )
{ m_selectedColor = QColor( c ); }
void ClipView::setTextColor( const QColor & c )
{ m_textColor = QColor( c ); }
void ClipView::setTextBackgroundColor( const QColor & c )
{
m_textBackgroundColor = c;
}
void ClipView::setTextShadowColor( const QColor & c )
{ m_textShadowColor = QColor( c ); }
void ClipView::setPatternClipBackground( const QColor & c )
{ m_patternClipBackground = QColor( c ); }
void ClipView::setGradient( const bool & b )
{ m_gradient = b; }
// access needsUpdate member variable
bool ClipView::needsUpdate()
{ return m_needsUpdate; }
void ClipView::setNeedsUpdate( bool b )
{ m_needsUpdate = b; }
/*! \brief Close a ClipView
*
* Closes a ClipView by asking the track
* view to remove us and then asking the QWidget to close us.
*
* \return Boolean state of whether the QWidget was able to close.
*/
bool ClipView::close()
{
m_trackView->getTrackContentWidget()->removeClipView( this );
return QWidget::close();
}
/*! \brief Removes a ClipView from its track view.
*
* Like the close() method, this asks the track view to remove this
* ClipView. However, the clip is
* scheduled for later deletion rather than closed immediately.
*
*/
void ClipView::remove()
{
m_trackView->getTrack()->addJournalCheckPoint();
// delete ourself
close();
if (m_clip->getTrack())
{
auto guard = Engine::audioEngine()->requestChangesGuard();
m_clip->getTrack()->removeClip(m_clip);
}
// TODO: Clip::~Clip should not be responsible for removing the Clip from the Track.
// One would expect that a call to Track::removeClip would already do that for you, as well
// as actually deleting the Clip with the deleteLater function. That being said, it shouldn't
// be possible to make a Clip without a Track (i.e., Clip::getTrack is never nullptr).
m_clip->deleteLater();
}
/*! \brief Updates a ClipView's length
*
* If this ClipView has a fixed Clip, then we must
* keep the width of our parent. Otherwise, calculate our width from
* the clip's length in pixels adding in the border.
*
*/
void ClipView::updateLength()
{
if( fixedClips() )
{
setFixedWidth( parentWidget()->width() );
}
else
{
// this std::max function is needed for clips that do not start or end on the beat, otherwise, they "disappear" when zooming to min
// 3 is the minimun width needed to make a clip visible
setFixedWidth(std::max(static_cast<int>(m_clip->length() * pixelsPerBar() / TimePos::ticksPerBar() + 1), 3));
}
m_trackView->trackContainerView()->update();
}
/*! \brief Updates a ClipView's position.
*
* Ask our track view to change our position. Then make sure that the
* track view is updated in case this position has changed the track
* view's length.
*
*/
void ClipView::updatePosition()
{
m_trackView->getTrackContentWidget()->changePosition();
// moving a Clip can result in change of song-length etc.,
// therefore we update the track-container
m_trackView->trackContainerView()->update();
}
void ClipView::selectColor()
{
// Get a color from the user
const auto newColor = ColorChooser{this}
.withPalette(ColorChooser::Palette::Track)
->getColor(m_clip->color().value_or(palette().window().color()));
if (newColor.isValid()) { setColor(newColor); }
}
void ClipView::randomizeColor()
{
setColor(ColorChooser::getPalette(ColorChooser::Palette::Mixer)[std::rand() % 48]);
}
void ClipView::resetColor()
{
setColor(std::nullopt);
}
/*! \brief Change color of all selected clips
*
* \param color The new color.
*/
void ClipView::setColor(const std::optional<QColor>& color)
{
std::set<Track*> journaledTracks;
auto selectedClips = getClickedClips();
for (auto clipv : selectedClips)
{
auto clip = clipv->getClip();
auto track = clip->getTrack();
// TODO journal whole Song or group of clips instead of one journal entry for each track
// If only one clip changed, store that in the journal
if (selectedClips.length() == 1)
{
clip->addJournalCheckPoint();
}
// If multiple clips changed, store whole Track in the journal
// Check if track has been journaled already by trying to add it to the set
else if (journaledTracks.insert(track).second)
{
track->addJournalCheckPoint();
}
clip->setColor(color);
clipv->update();
}
Engine::getSong()->setModified();
}
/*! \brief Change the ClipView's display when something
* being dragged enters it.
*
* We need to notify Qt to change our display if something being
* dragged has entered our 'airspace'.
*
* \param dee The QDragEnterEvent to watch.
*/
void ClipView::dragEnterEvent( QDragEnterEvent * dee )
{
TrackContentWidget * tcw = getTrackView()->getTrackContentWidget();
TimePos clipPos{m_clip->startPosition()};
if( tcw->canPasteSelection( clipPos, dee ) == false )
{
dee->ignore();
}
else
{
StringPairDrag::processDragEnterEvent( dee, "clip_" +
QString::number( static_cast<int>(m_clip->getTrack()->type()) ) );
}
}
/*! \brief Handle something being dropped on this ClipObjectView.
*
* When something has been dropped on this ClipView, and
* it's a clip, then use an instance of our dataFile reader
* to take the xml of the clip and turn it into something
* we can write over our current state.
*
* \param de The QDropEvent to handle.
*/
void ClipView::dropEvent( QDropEvent * de )
{
QString type = StringPairDrag::decodeKey( de );
QString value = StringPairDrag::decodeValue( de );
// Track must be the same type to paste into
if( type != ( "clip_" + QString::number( static_cast<int>(m_clip->getTrack()->type()) ) ) )
{
return;
}
// Defer to rubberband paste if we're in that mode
if( m_trackView->trackContainerView()->allowRubberband() == true )
{
TrackContentWidget * tcw = getTrackView()->getTrackContentWidget();
TimePos clipPos{m_clip->startPosition()};
if( tcw->pasteSelection( clipPos, de ) == true )
{
de->accept();
}
return;
}
// Don't allow pasting a clip into itself.
QObject* qwSource = de->source();
if( qwSource != nullptr &&
dynamic_cast<ClipView *>( qwSource ) == this )
{
return;
}
// Copy state into existing clip
DataFile dataFile( value.toUtf8() );
TimePos pos = m_clip->startPosition();
QDomElement clips = dataFile.content().firstChildElement("clips");
m_clip->restoreState( clips.firstChildElement().firstChildElement() );
m_clip->movePosition( pos );
AutomationClip::resolveAllIDs();
de->accept();
}
/* @brief Chooses the correct cursor to be displayed on the widget
*
* @param me The QMouseEvent that is triggering the cursor change
*/
void ClipView::updateCursor(QMouseEvent * me)
{
auto sClip = dynamic_cast<SampleClip*>(m_clip);
auto pClip = dynamic_cast<PatternClip*>(m_clip);
// If we are at the edges, use the resize cursor
if (!me->buttons() && !m_clip->getAutoResize() && !isSelected()
&& ((me->x() > width() - RESIZE_GRIP_WIDTH) || (me->x() < RESIZE_GRIP_WIDTH && (sClip || pClip))))
{
setCursor(Qt::SizeHorCursor);
}
// If we are in the middle on knife mode, use the knife cursor
else if (sClip && m_trackView->trackContainerView()->knifeMode() && !isSelected())
{
setCursor(m_cursorKnife);
}
// If we are in the middle in any other mode, use the hand cursor
else { setCursor(m_cursorHand); }
}
/*! \brief Create a DataFile suitable for copying multiple clips.
*
* Clips in the vector are written to the "clips" node in the
* DataFile. The ClipView's initial mouse position is written
* to the "initialMouseX" node in the DataFile. When dropped on a track,
* this is used to create copies of the Clips.
*
* \param clips The trackContectObjects to save in a DataFile
*/
DataFile ClipView::createClipDataFiles(
const QVector<ClipView *> & clipViews) const
{
Track * t = m_trackView->getTrack();
TrackContainer * tc = t->trackContainer();
DataFile dataFile( DataFile::Type::DragNDropData );
QDomElement clipParent = dataFile.createElement("clips");
for (const auto& clipView : clipViews)
{
// Insert into the dom under the "clips" element
Track* clipTrack = clipView->m_trackView->getTrack();
int trackIndex = std::distance(tc->tracks().begin(), std::find(tc->tracks().begin(), tc->tracks().end(), clipTrack));
assert(trackIndex != tc->tracks().size());
QDomElement clipElement = dataFile.createElement("clip");
clipElement.setAttribute( "trackIndex", trackIndex );
clipElement.setAttribute( "trackType", static_cast<int>(clipTrack->type()) );
clipElement.setAttribute( "trackName", clipTrack->name() );
clipView->m_clip->saveState(dataFile, clipElement);
clipParent.appendChild( clipElement );
}
dataFile.content().appendChild( clipParent );
// Add extra metadata needed for calculations later
const auto initialTrackIt = std::find(tc->tracks().begin(), tc->tracks().end(), t);
if (initialTrackIt == tc->tracks().end())
{
printf("Failed to find selected track in the TrackContainer.\n");
return dataFile;
}
const int initialTrackIndex = std::distance(tc->tracks().begin(), initialTrackIt);
QDomElement metadata = dataFile.createElement( "copyMetadata" );
// initialTrackIndex is the index of the track that was touched
metadata.setAttribute( "initialTrackIndex", initialTrackIndex );
metadata.setAttribute( "trackContainerId", tc->id() );
// grabbedClipPos is the pos of the bar containing the Clip we grabbed
metadata.setAttribute( "grabbedClipPos", m_clip->startPosition() );
dataFile.content().appendChild( metadata );
return dataFile;
}
void ClipView::paintTextLabel(QString const & text, QPainter & painter)
{
if (text.trimmed() == "")
{
return;
}
painter.setRenderHint( QPainter::TextAntialiasing );
QFont labelFont = this->font();
labelFont.setHintingPreference( QFont::PreferFullHinting );
painter.setFont( labelFont );
const int textTop = BORDER_WIDTH + 1;
const int textLeft = BORDER_WIDTH + 3;
QFontMetrics fontMetrics(labelFont);
QString elidedClipName = fontMetrics.elidedText(text, Qt::ElideMiddle, width() - 2 * textLeft);
if (elidedClipName.length() < 2)
{
elidedClipName = text.trimmed();
}
painter.fillRect(QRect(0, 0, width(), fontMetrics.height() + 2 * textTop), textBackgroundColor());
int const finalTextTop = textTop + fontMetrics.ascent();
painter.setPen(textShadowColor());
painter.drawText( textLeft + 1, finalTextTop + 1, elidedClipName );
painter.setPen( textColor() );
painter.drawText( textLeft, finalTextTop, elidedClipName );
}
/*! \brief Handle a mouse press on this ClipView.
*
* Handles the various ways in which a ClipView can be
* used with a click of a mouse button.
*
* * If our container supports rubber band selection then handle
* selection events.
* * or if shift-left button, add this object to the selection
* * or if ctrl-left button, start a drag-copy event
* * or if just plain left button, resize if we're resizeable
* * or if ctrl-middle button, mute the clip
* * or if middle button, maybe delete the clip.
*
* \param me The QMouseEvent to handle.
*/
void ClipView::mousePressEvent( QMouseEvent * me )
{
// Right now, active is only used on right/mid clicks actions, so we use a ternary operator
// to avoid the overhead of calling getClickedClips when it's not used
auto active = me->button() == Qt::LeftButton
? QVector<ClipView *>()
: getClickedClips();
setInitialPos( me->pos() );
setInitialOffsets();
if( !fixedClips() && me->button() == Qt::LeftButton )
{
auto sClip = dynamic_cast<SampleClip*>(m_clip);
auto pClip = dynamic_cast<PatternClip*>(m_clip);
const bool knifeMode = m_trackView->trackContainerView()->knifeMode();
if ( me->modifiers() & Qt::ControlModifier && !(sClip && knifeMode) )
{
if( isSelected() )
{
m_action = Action::CopySelection;
}
else
{
m_action = Action::ToggleSelected;
}
}
else
{
if( isSelected() )
{
m_action = Action::MoveSelection;
}
else
{
getGUI()->songEditor()->m_editor->selectAllClips( false );
m_clip->addJournalCheckPoint();
// Action::Move, Action::Resize and Action::ResizeLeft
// Action::Split action doesn't disable Clip journalling
if (m_action == Action::Move || m_action == Action::Resize || m_action == Action::ResizeLeft)
{
m_clip->setJournalling(false);
}
setInitialPos( me->pos() );
setInitialOffsets();
if( m_clip->getAutoResize() )
{ // Always move clips that can't be manually resized
m_action = Action::Move;
setCursor( Qt::SizeAllCursor );
}
else if( me->x() >= width() - RESIZE_GRIP_WIDTH )
{
m_action = Action::Resize;
setCursor( Qt::SizeHorCursor );
}
else if( me->x() < RESIZE_GRIP_WIDTH && (sClip || pClip) )
{
m_action = Action::ResizeLeft;
setCursor( Qt::SizeHorCursor );
}
else if( sClip && knifeMode )
{
m_action = Action::Split;
setCursor( m_cursorKnife );
setMarkerPos( knifeMarkerPos( me ) );
setMarkerEnabled( true );
update();
}
else
{
m_action = Action::Move;
setCursor( Qt::SizeAllCursor );
}
if( m_action == Action::Move )
{
s_textFloat->setTitle( tr( "Current position" ) );
s_textFloat->setText( QString( "%1:%2" ).
arg( m_clip->startPosition().getBar() + 1 ).
arg( m_clip->startPosition().getTicks() %
TimePos::ticksPerBar() ) );
}
else if( m_action == Action::Resize || m_action == Action::ResizeLeft )
{
s_textFloat->setTitle( tr( "Current length" ) );
s_textFloat->setText( tr( "%1:%2 (%3:%4 to %5:%6)" ).
arg( m_clip->length().getBar() ).
arg( m_clip->length().getTicks() %
TimePos::ticksPerBar() ).
arg( m_clip->startPosition().getBar() + 1 ).
arg( m_clip->startPosition().getTicks() %
TimePos::ticksPerBar() ).
arg( m_clip->endPosition().getBar() + 1 ).
arg( m_clip->endPosition().getTicks() %
TimePos::ticksPerBar() ) );
}
// s_textFloat->reparent( this );
// setup text-float as if Clip was already moved/resized
s_textFloat->moveGlobal( this, QPoint( width() + 2, height() + 2) );
if ( m_action != Action::Split) { s_textFloat->show(); }
}
delete m_hint;
QString hint = m_action == Action::Move || m_action == Action::MoveSelection
? tr( "Press <%1> and drag to make a copy." )
: tr( "Press <%1> for free resizing." );
m_hint = TextFloat::displayMessage( tr( "Hint" ), hint.arg(UI_CTRL_KEY),
embed::getIconPixmap( "hint" ), 0 );
}
}
else if( me->button() == Qt::RightButton )
{
if( me->modifiers() & Qt::ControlModifier )
{
toggleMute( active );
}
else if( me->modifiers() & Qt::ShiftModifier && !fixedClips() )
{
remove( active );
}
if (m_action == Action::Split)
{
m_action = Action::None;
auto sClip = dynamic_cast<SampleClip*>(m_clip);
if (sClip)
{
setMarkerEnabled( false );
update();
}
}
}
else if( me->button() == Qt::MiddleButton )
{
if( me->modifiers() & Qt::ControlModifier )
{
toggleMute( active );
}
else if( !fixedClips() )
{
remove( active );
}
}
}
/*! \brief Handle a mouse movement (drag) on this ClipView.
*
* Handles the various ways in which a ClipView can be
* used with a mouse drag.
*
* * If in move mode, move ourselves in the track,
* * or if in move-selection mode, move the entire selection,
* * or if in resize mode, resize ourselves,
* * otherwise ???
*
* \param me The QMouseEvent to handle.
* \todo what does the final else case do here?
*/
void ClipView::mouseMoveEvent( QMouseEvent * me )
{
if( m_action == Action::CopySelection || m_action == Action::ToggleSelected )
{
if( mouseMovedDistance( me, 2 ) == true )
{
QVector<ClipView *> clipViews;
if( m_action == Action::CopySelection )
{
// Collect all selected Clips
QVector<selectableObject *> so =
m_trackView->trackContainerView()->selectedObjects();
for (const auto& selectedClip : so)
{
auto clipv = dynamic_cast<ClipView*>(selectedClip);
if( clipv != nullptr )
{
clipViews.push_back( clipv );
}
}
}
else
{
getGUI()->songEditor()->m_editor->selectAllClips( false );
clipViews.push_back( this );
}
// Clear the action here because mouseReleaseEvent will not get
// triggered once we go into drag.
m_action = Action::None;
// Write the Clips to the DataFile for copying
DataFile dataFile = createClipDataFiles( clipViews );
// TODO -- thumbnail for all selected
QPixmap thumbnail = grab().scaled(
128, 128,
Qt::KeepAspectRatio,
Qt::SmoothTransformation );
new StringPairDrag( QString( "clip_%1" ).arg(
static_cast<int>(m_clip->getTrack()->type()) ),
dataFile.toString(), thumbnail, this );
}
}
if( me->modifiers() & Qt::ControlModifier )
{
delete m_hint;
m_hint = nullptr;
}
const float ppb = m_trackView->trackContainerView()->pixelsPerBar();
if( m_action == Action::Move )
{
TimePos newPos = draggedClipPos( me );
m_clip->movePosition(newPos);
newPos = m_clip->startPosition(); // Get the real position the Clip was dragged to for the label
m_trackView->getTrackContentWidget()->changePosition();
s_textFloat->setText( QString( "%1:%2" ).
arg( newPos.getBar() + 1 ).
arg( newPos.getTicks() %
TimePos::ticksPerBar() ) );
s_textFloat->moveGlobal( this, QPoint( width() + 2, height() + 2 ) );
}
else if( m_action == Action::MoveSelection )
{
// 1: Find the position we want to move the grabbed Clip to
TimePos newPos = draggedClipPos( me );
// 2: Handle moving the other selected Clips the same distance
QVector<selectableObject *> so =
m_trackView->trackContainerView()->selectedObjects();
QVector<Clip *> clips; // List of selected clips
int leftmost = 0; // Leftmost clip's offset from grabbed clip
// Populate clips, find leftmost
for( QVector<selectableObject *>::iterator it = so.begin();
it != so.end(); ++it )
{
auto clipv = dynamic_cast<ClipView*>(*it);
if( clipv == nullptr ) { continue; }
clips.push_back( clipv->m_clip );
int index = std::distance( so.begin(), it );
leftmost = std::min(leftmost, m_initialOffsets[index].getTicks());
}
// Make sure the leftmost clip doesn't get moved to a negative position
if ( newPos.getTicks() + leftmost < 0 ) { newPos = -leftmost; }
for( QVector<Clip *>::iterator it = clips.begin();
it != clips.end(); ++it )
{
int index = std::distance( clips.begin(), it );
( *it )->movePosition( newPos + m_initialOffsets[index] );
}
}
else if( m_action == Action::Resize || m_action == Action::ResizeLeft )
{
const float snapSize = getGUI()->songEditor()->m_editor->getSnapSize();
// Length in ticks of one snap increment
const TimePos snapLength = TimePos( (int)(snapSize * TimePos::ticksPerBar()) );
if( m_action == Action::Resize )
{
// The clip's new length
TimePos l = static_cast<int>( me->x() * TimePos::ticksPerBar() / ppb );
// If the user is holding alt, or pressed ctrl after beginning the drag, don't quantize
if ( unquantizedModHeld(me) )
{ // We want to preserve this adjusted offset,
// even if the user switches to snapping later
setInitialPos( m_initialMousePos );
// Don't resize to less than 1 tick
m_clip->changeLength( qMax<int>( 1, l ) );
}
else if ( me->modifiers() & Qt::ShiftModifier )
{ // If shift is held, quantize clip's end position
TimePos end = TimePos( m_initialClipPos + l ).quantize( snapSize );
// The end position has to be after the clip's start
TimePos min = m_initialClipPos.quantize( snapSize );
if ( min <= m_initialClipPos ) min += snapLength;
m_clip->changeLength( qMax<int>(min - m_initialClipPos, end - m_initialClipPos) );
}
else
{ // Otherwise, resize in fixed increments
TimePos initialLength = m_initialClipEnd - m_initialClipPos;
TimePos offset = TimePos( l - initialLength ).quantize( snapSize );
// Don't resize to less than 1 tick
auto min = TimePos(initialLength % snapLength);
if (min < 1) min += snapLength;
m_clip->changeLength( qMax<int>( min, initialLength + offset) );
}
}
else
{
auto sClip = dynamic_cast<SampleClip*>(m_clip);
auto pClip = dynamic_cast<PatternClip*>(m_clip);
if( sClip || pClip )
{
const int x = mapToParent( me->pos() ).x() - m_initialMousePos.x();
TimePos t = qMax( 0, (int)
m_trackView->trackContainerView()->currentPosition() +
static_cast<int>( x * TimePos::ticksPerBar() / ppb ) );
if( unquantizedModHeld(me) )
{ // We want to preserve this adjusted offset,
// even if the user switches to snapping later
setInitialPos( m_initialMousePos );
//Don't resize to less than 1 tick
t = qMin<int>( m_initialClipEnd - 1, t);
}
else if( me->modifiers() & Qt::ShiftModifier )
{ // If shift is held, quantize clip's start position
// Don't let the start position move past the end position
TimePos max = m_initialClipEnd.quantize( snapSize );
if ( max >= m_initialClipEnd ) max -= snapLength;
t = qMin<int>( max, t.quantize( snapSize ) );
}
else
{ // Otherwise, resize in fixed increments
// Don't resize to less than 1 tick
TimePos initialLength = m_initialClipEnd - m_initialClipPos;
auto minLength = TimePos(initialLength % snapLength);
if (minLength < 1) minLength += snapLength;
TimePos offset = TimePos(t - m_initialClipPos).quantize( snapSize );
t = qMin<int>( m_initialClipEnd - minLength, m_initialClipPos + offset );
}
TimePos positionOffset = m_clip->startPosition() - t;
if (m_clip->length() + positionOffset >= 1)
{
m_clip->movePosition(t);
m_clip->changeLength(m_clip->length() + positionOffset);
if (sClip)
{
sClip->setStartTimeOffset(sClip->startTimeOffset() + positionOffset);
}
else if (pClip)
{
// Modulus the start time offset as we need it only for offsets
// inside the pattern length. This is done to prevent a value overflow.
// The start time offset may still become larger than the pattern length
// whenever the pattern length decreases without a clip resize following.
// To deal safely with it, always modulus before use.
tick_t patternLength = Engine::patternStore()->lengthOfPattern(pClip->patternIndex())
* TimePos::ticksPerBar();
TimePos position = (pClip->startTimeOffset() + positionOffset) % patternLength;
pClip->setStartTimeOffset(position);
}
}
}
}
s_textFloat->setText( tr( "%1:%2 (%3:%4 to %5:%6)" ).
arg( m_clip->length().getBar() ).
arg( m_clip->length().getTicks() %
TimePos::ticksPerBar() ).
arg( m_clip->startPosition().getBar() + 1 ).
arg( m_clip->startPosition().getTicks() %
TimePos::ticksPerBar() ).
arg( m_clip->endPosition().getBar() + 1 ).
arg( m_clip->endPosition().getTicks() %
TimePos::ticksPerBar() ) );
s_textFloat->moveGlobal( this, QPoint( width() + 2, height() + 2) );
}
else if( m_action == Action::Split )
{
auto sClip = dynamic_cast<SampleClip*>(m_clip);
if (sClip) {
setCursor( m_cursorKnife );
setMarkerPos( knifeMarkerPos( me ) );
}
update();
}
// None of the actions above, we will just handle the cursor
else { updateCursor(me); }
}
/*! \brief Handle a mouse release on this ClipView.