git.sesse.net Git - kdenlive/blob - src/abstractgroupitem.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2008 by Marco Gittler (g.marco@freenet.de)              *
   3  *   Copyright (C) 2008 by Jean-Baptiste Mardelle (jb@kdenlive.org)        *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
  19  ***************************************************************************/
  20
  21 #include "abstractgroupitem.h"
  22 #include "abstractclipitem.h"
  23 #include "kdenlivesettings.h"
  24 #include "customtrackscene.h"
  25 #include "customtrackview.h"
  26
  27 #include <KDebug>
  28
  29 #include <QPainter>
  30 #include <QStyleOptionGraphicsItem>
  31 #include <QDomDocument>
  32 #include <QMimeData>
  33 #include <QGraphicsSceneMouseEvent>
  34
  35
  36 AbstractGroupItem::AbstractGroupItem(double /* fps */) :
  37         QObject(),
  38         QGraphicsItemGroup()
  39 {
  40     setZValue(1);
  41     setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
  42 #if QT_VERSION >= 0x040600
  43     setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);
  44 #endif
  45     setAcceptDrops(true);
  46     m_resizeInfos = QList <ItemInfo>();
  47 }
  48
  49 int AbstractGroupItem::type() const
  50 {
  51     return GROUPWIDGET;
  52 }
  53
  54 int AbstractGroupItem::track() const
  55 {
  56     //return (int)(scenePos().y() / KdenliveSettings::trackheight());
  57     int topTrack = -1;
  58     QList<QGraphicsItem *> children = childItems();
  59     for (int i = 0; i < children.count(); ++i) {
  60         if (children.at(i)->type() == GROUPWIDGET) {
  61             children.append(children.at(i)->childItems());
  62             continue;
  63         }
  64         AbstractClipItem *item = static_cast <AbstractClipItem *>(children.at(i));
  65         if (item && (topTrack == -1 || topTrack > item->track())) {
  66             topTrack = item->track();
  67         }
  68     }
  69     return topTrack;
  70 }
  71
  72 void AbstractGroupItem::setItemLocked(bool locked)
  73 {
  74     if (locked)
  75         setSelected(false);
  76
  77     setFlag(QGraphicsItem::ItemIsMovable, !locked);
  78     setFlag(QGraphicsItem::ItemIsSelectable, !locked);
  79
  80     foreach (QGraphicsItem *child, childItems())
  81         ((AbstractClipItem *)child)->setItemLocked(locked);
  82 }
  83
  84 bool AbstractGroupItem::isItemLocked() const
  85 {
  86     return !(flags() & (QGraphicsItem::ItemIsSelectable));
  87 }
  88
  89 CustomTrackScene* AbstractGroupItem::projectScene()
  90 {
  91     if (scene()) return static_cast <CustomTrackScene*>(scene());
  92     return NULL;
  93 }
  94
  95 QPainterPath AbstractGroupItem::clipGroupShape(QPointF offset) const
  96 {
  97     return groupShape(AVWIDGET, offset);
  98 }
  99
 100 QPainterPath AbstractGroupItem::transitionGroupShape(QPointF offset) const
 101 {
 102     return groupShape(TRANSITIONWIDGET, offset);
 103 }
 104
 105 QPainterPath AbstractGroupItem::groupShape(GRAPHICSRECTITEM type, QPointF offset) const
 106 {
 107     QPainterPath path;
 108     QList<QGraphicsItem *> children = childItems();
 109     for (int i = 0; i < children.count(); i++) {
 110         if (children.at(i)->type() == (int)type) {
 111             QRectF r(children.at(i)->sceneBoundingRect());
 112             r.translate(offset);
 113             path.addRect(r);
 114         } else if (children.at(i)->type() == GROUPWIDGET) {
 115             QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 116             for (int j = 0; j < subchildren.count(); j++) {
 117                 if (subchildren.at(j)->type() == (int)type) {
 118                     QRectF r(subchildren.at(j)->sceneBoundingRect());
 119                     r.translate(offset);
 120                     path.addRect(r);
 121                 }
 122             }
 123         }
 124     }
 125     return path;
 126 }
 127
 128 void AbstractGroupItem::addItem(QGraphicsItem * item)
 129 {
 130     addToGroup(item);
 131     item->setFlag(QGraphicsItem::ItemIsMovable, false);
 132 }
 133
 134 void AbstractGroupItem::removeItem(QGraphicsItem * item)
 135 {
 136     removeFromGroup(item);
 137 }
 138
 139 void AbstractGroupItem::fixItemRect()
 140 {
 141     QPointF start = boundingRect().topLeft();
 142     if (start != QPointF(0, 0)) {
 143         translate(0 - start.x(), 0 - start.y());
 144         setPos(start);
 145     }
 146 }
 147
 148 /*ItemInfo AbstractGroupItem::info() const {
 149     ItemInfo itemInfo;
 150     itemInfo.startPos = m_startPos;
 151     itemInfo.track = m_track;
 152     return itemInfo;
 153 }*/
 154
 155 // virtual
 156 void AbstractGroupItem::paint(QPainter *p, const QStyleOptionGraphicsItem *option, QWidget *)
 157 {
 158     QColor bgcolor(100, 100, 200, 100);
 159     QRectF bound = option->exposedRect.adjusted(0, 0, 1, 1);
 160     p->setClipRect(bound);
 161     const QRectF mapped = p->worldTransform().mapRect(option->exposedRect);
 162     p->setWorldMatrixEnabled(false);
 163     p->setBrush(bgcolor);
 164     QPen pen = p->pen();
 165     pen.setColor(QColor(200, 90, 90));
 166     pen.setStyle(Qt::DashLine);
 167     pen.setWidthF(0.0);
 168     p->setPen(pen);
 169     p->drawRoundedRect(mapped, 3, 3);
 170 }
 171
 172 //virtual
 173 QVariant AbstractGroupItem::itemChange(GraphicsItemChange change, const QVariant &value)
 174 {
 175     if (change == QGraphicsItem::ItemSelectedChange) {
 176         if (value.toBool()) setZValue(10);
 177         else setZValue(1);
 178     }
 179     if (change == ItemPositionChange && scene() && parentItem() == 0) {
 180         // calculate new position.
 181         const int trackHeight = KdenliveSettings::trackheight();
 182         QPointF start = sceneBoundingRect().topLeft();
 183         QPointF newPos = value.toPointF();
 184         int xpos = projectScene()->getSnapPointForPos((int)(start.x() + newPos.x() - pos().x()), KdenliveSettings::snaptopoints());
 185
 186         xpos = qMax(xpos, 0);
 187         //kDebug()<<"GRP XPOS:"<<xpos<<", START:"<<start.x()<<",NEW:"<<newPos.x()<<"; SCENE:"<<scenePos().x()<<",POS:"<<pos().x();
 188         newPos.setX((int)(pos().x() + xpos - (int) start.x()));
 189         QStringList lockedTracks = property("locked_tracks").toStringList();
 190         int proposedTrack = (property("y_absolute").toInt() + newPos.y()) / trackHeight;
 191         // Check if top item is a clip or a transition
 192         int offset = 0;
 193         int topTrack = -1;
 194         QList<int> groupTracks;
 195         QList<QGraphicsItem *> children = childItems();
 196         for (int i = 0; i < children.count(); i++) {
 197             int currentTrack = 0;
 198             if (children.at(i)->type() == AVWIDGET || children.at(i)->type() == TRANSITIONWIDGET) {
 199                 currentTrack = static_cast <AbstractClipItem*> (children.at(i))->track();
 200                 if (!groupTracks.contains(currentTrack)) groupTracks.append(currentTrack);
 201             }
 202             else if (children.at(i)->type() == GROUPWIDGET) {
 203                 currentTrack = static_cast <AbstractGroupItem*> (children.at(i))->track();
 204             }
 205             else continue;
 206             if (children.at(i)->type() == AVWIDGET) {
 207                 if (topTrack == -1 || currentTrack <= topTrack) {
 208                     offset = 0;
 209                     topTrack = currentTrack;
 210                 }
 211             } else if (children.at(i)->type() == TRANSITIONWIDGET) {
 212                 if (topTrack == -1 || currentTrack < topTrack) {
 213                     offset = (int)(trackHeight / 3 * 2 - 1);
 214                     topTrack = currentTrack;
 215                 }
 216             } else if (children.at(i)->type() == GROUPWIDGET) {
 217                 QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 218                 bool clipGroup = false;
 219                 for (int j = 0; j < subchildren.count(); j++) {
 220                     if (subchildren.at(j)->type() == AVWIDGET || subchildren.at(j)->type() == TRANSITIONWIDGET) {
 221                         int subTrack = static_cast <AbstractClipItem*> (subchildren.at(j))->track();
 222                         if (!groupTracks.contains(subTrack)) groupTracks.append(subTrack);
 223                         clipGroup = true;
 224                     }
 225                 }
 226                 if (clipGroup) {
 227                     if (topTrack == -1 || currentTrack <= topTrack) {
 228                         offset = 0;
 229                         topTrack = currentTrack;
 230                     }
 231                 } else {
 232                     if (topTrack == -1 || currentTrack < topTrack) {
 233                         offset = (int)(trackHeight / 3 * 2 - 1);
 234                         topTrack = currentTrack;
 235                     }
 236                 }
 237             }
 238         }
 239         // Check no clip in the group goes outside of existing tracks
 240         int maximumTrack = projectScene()->tracksCount() - 1;
 241         int groupHeight = 0;
 242         for (int i = 0; i < groupTracks.count(); i++) {
 243             int offset = groupTracks.at(i) - topTrack;
 244             if (offset > groupHeight) groupHeight = offset;
 245         }
 246         maximumTrack -= groupHeight;
 247         proposedTrack = qMin(proposedTrack, maximumTrack);
 248         proposedTrack = qMax(proposedTrack, 0);
 249         int groupOffset = proposedTrack - topTrack;
 250         if (!lockedTracks.isEmpty()) {
 251             for (int i = 0; i < groupTracks.count(); i++) {
 252                 if (lockedTracks.contains(QString::number(groupTracks.at(i) + groupOffset))) {
 253                     return pos();
 254                 }
 255             }
 256         }
 257         newPos.setY((int)((proposedTrack) * trackHeight) + offset);
 258         //if (newPos == start) return start;
 259
 260         /*if (newPos.x() < 0) {
 261             // If group goes below 0, adjust position to 0
 262             return QPointF(pos().x() - start.x(), pos().y());
 263         }*/
 264
 265         QList<QGraphicsItem*> collidingItems;
 266         QPainterPath shape;
 267         if (projectScene()->editMode() == NORMALEDIT) {
 268             shape = clipGroupShape(newPos - pos());
 269             collidingItems = scene()->items(shape, Qt::IntersectsItemShape);
 270             collidingItems.removeAll(this);
 271             for (int i = 0; i < children.count(); i++) {
 272                 if (children.at(i)->type() == GROUPWIDGET) {
 273                     QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 274                     for (int j = 0; j < subchildren.count(); j++) {
 275                         collidingItems.removeAll(subchildren.at(j));
 276                     }
 277                 }
 278                 collidingItems.removeAll(children.at(i));
 279             }
 280         }
 281         if (!collidingItems.isEmpty()) {
 282             bool forwardMove = xpos > start.x();
 283             int offset = 0;
 284             for (int i = 0; i < collidingItems.count(); i++) {
 285                 QGraphicsItem *collision = collidingItems.at(i);
 286                 if (collision->type() == AVWIDGET) {
 287                     // Collision
 288                     if (newPos.y() != pos().y()) {
 289                         // Track change results in collision, restore original position
 290                         return pos();
 291                     }
 292                     AbstractClipItem *item = static_cast <AbstractClipItem *>(collision);
 293                     if (forwardMove) {
 294                         // Moving forward, determine best pos
 295                         QPainterPath clipPath;
 296                         clipPath.addRect(item->sceneBoundingRect());
 297                         QPainterPath res = shape.intersected(clipPath);
 298                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 299                     } else {
 300                         // Moving backward, determine best pos
 301                         QPainterPath clipPath;
 302                         clipPath.addRect(item->sceneBoundingRect());
 303                         QPainterPath res = shape.intersected(clipPath);
 304                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 305                     }
 306                 }
 307             }
 308             if (offset > 0) {
 309                 if (forwardMove) {
 310                     newPos.setX(newPos.x() - offset);
 311                 } else {
 312                     newPos.setX(newPos.x() + offset);
 313                 }
 314                 // If there is still a collision after our position adjust, restore original pos
 315                 collidingItems = scene()->items(clipGroupShape(newPos - pos()), Qt::IntersectsItemShape);
 316                 collidingItems.removeAll(this);
 317                 for (int i = 0; i < children.count(); i++) {
 318                     if (children.at(i)->type() == GROUPWIDGET) {
 319                         QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 320                         for (int j = 0; j < subchildren.count(); j++) {
 321                             collidingItems.removeAll(subchildren.at(j));
 322                         }
 323                     }
 324                     collidingItems.removeAll(children.at(i));
 325                 }
 326                 for (int i = 0; i < collidingItems.count(); i++)
 327                     if (collidingItems.at(i)->type() == AVWIDGET) return pos();
 328             }
 329         }
 330
 331         if (projectScene()->editMode() == NORMALEDIT) {
 332             shape = transitionGroupShape(newPos - pos());
 333             collidingItems = scene()->items(shape, Qt::IntersectsItemShape);
 334             collidingItems.removeAll(this);
 335             for (int i = 0; i < children.count(); i++) {
 336                 if (children.at(i)->type() == GROUPWIDGET) {
 337                     QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 338                     for (int j = 0; j < subchildren.count(); j++) {
 339                         collidingItems.removeAll(subchildren.at(j));
 340                     }
 341                 }
 342                 collidingItems.removeAll(children.at(i));
 343             }
 344         }
 345         if (collidingItems.isEmpty()) return newPos;
 346         else {
 347             bool forwardMove = xpos > start.x();
 348             int offset = 0;
 349             for (int i = 0; i < collidingItems.count(); i++) {
 350                 QGraphicsItem *collision = collidingItems.at(i);
 351                 if (collision->type() == TRANSITIONWIDGET) {
 352                     // Collision
 353                     if (newPos.y() != pos().y()) {
 354                         // Track change results in collision, restore original position
 355                         return pos();
 356                     }
 357                     AbstractClipItem *item = static_cast <AbstractClipItem *>(collision);
 358                     if (forwardMove) {
 359                         // Moving forward, determine best pos
 360                         QPainterPath clipPath;
 361                         clipPath.addRect(item->sceneBoundingRect());
 362                         QPainterPath res = shape.intersected(clipPath);
 363                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 364                     } else {
 365                         // Moving backward, determine best pos
 366                         QPainterPath clipPath;
 367                         clipPath.addRect(item->sceneBoundingRect());
 368                         QPainterPath res = shape.intersected(clipPath);
 369                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 370                     }
 371                 }
 372             }
 373             if (offset > 0) {
 374                 if (forwardMove) {
 375                     newPos.setX(newPos.x() - offset);
 376                 } else {
 377                     newPos.setX(newPos.x() + offset);
 378                 }
 379                 // If there is still a collision after our position adjust, restore original pos
 380                 collidingItems = scene()->items(transitionGroupShape(newPos - pos()), Qt::IntersectsItemShape);
 381                 for (int i = 0; i < children.count(); i++) {
 382                     collidingItems.removeAll(children.at(i));
 383                 }
 384                 for (int i = 0; i < collidingItems.count(); i++)
 385                     if (collidingItems.at(i)->type() == TRANSITIONWIDGET) return pos();
 386             }
 387         }
 388         return newPos;
 389     }
 390     return QGraphicsItemGroup::itemChange(change, value);
 391 }
 392
 393 //virtual
 394 void AbstractGroupItem::dropEvent(QGraphicsSceneDragDropEvent * event)
 395 {
 396     QString effects = QString::fromUtf8(event->mimeData()->data("kdenlive/effectslist"));
 397     QDomDocument doc;
 398     doc.setContent(effects, true);
 399     QDomElement e = doc.documentElement();
 400     e.setAttribute("kdenlive_ix", 0);
 401     CustomTrackView *view = (CustomTrackView *) scene()->views()[0];
 402     QPointF dropPos = event->scenePos();
 403     QList<QGraphicsItem *> selection = scene()->items(dropPos);
 404     AbstractClipItem *dropChild = NULL;
 405     for (int i = 0; i < selection.count(); i++) {
 406         if (selection.at(i)->type() == AVWIDGET) {
 407             dropChild = (AbstractClipItem *) selection.at(i);
 408             break;
 409         }
 410     }
 411     if (view) view->slotAddGroupEffect(e, this, dropChild);
 412 }
 413
 414 //virtual
 415 void AbstractGroupItem::dragEnterEvent(QGraphicsSceneDragDropEvent *event)
 416 {
 417     event->setAccepted(event->mimeData()->hasFormat("kdenlive/effectslist"));
 418 }
 419
 420 void AbstractGroupItem::dragLeaveEvent(QGraphicsSceneDragDropEvent *event)
 421 {
 422     Q_UNUSED(event)
 423 }
 424
 425 // virtual
 426 void AbstractGroupItem::mousePressEvent(QGraphicsSceneMouseEvent * event)
 427 {
 428     if (event->modifiers() & Qt::ShiftModifier) {
 429         // User want to do a rectangle selection, so ignore the event to pass it to the view
 430         event->ignore();
 431     } else {
 432         QList <QGraphicsItem *>list = scene()->items(event->scenePos());
 433         // only allow group move if we click over an item in the group
 434         foreach(const QGraphicsItem *item, list) {
 435             if (item->type() == TRANSITIONWIDGET || item->type() == AVWIDGET) {
 436                 QGraphicsItem::mousePressEvent(event);
 437                 return;
 438             }
 439         }
 440         event->ignore();
 441     }
 442 }
 443
 444 void AbstractGroupItem::resizeStart(int diff)
 445 {
 446     bool info = false;
 447     if (m_resizeInfos.isEmpty())
 448         info = true;
 449     int maximum = diff;
 450     QList <QGraphicsItem *> children = childItems();
 451     QList <AbstractClipItem *> items;
 452     int itemcount = 0;
 453     for (int i = 0; i < children.count(); ++i) {
 454         AbstractClipItem *item = static_cast <AbstractClipItem *>(children.at(i));
 455         if (item && item->type() == AVWIDGET) {
 456             items << item;
 457             if (info)
 458                 m_resizeInfos << item->info();
 459             item->resizeStart((int)(m_resizeInfos.at(itemcount).startPos.frames(item->fps())) + diff);
 460             int itemdiff = (int)(item->startPos() - m_resizeInfos.at(itemcount).startPos).frames(item->fps());
 461             if (qAbs(itemdiff) < qAbs(maximum))
 462                 maximum = itemdiff;
 463             ++itemcount;
 464         }
 465     }
 466
 467     for (int i = 0; i < items.count(); ++i)
 468         items.at(i)->resizeStart((int)(m_resizeInfos.at(i).startPos.frames(items.at(i)->fps())) + maximum);
 469 }
 470
 471 void AbstractGroupItem::resizeEnd(int diff)
 472 {
 473     bool info = false;
 474     if (m_resizeInfos.isEmpty())
 475         info = true;
 476     int maximum = diff;
 477     QList <QGraphicsItem *> children = childItems();
 478     QList <AbstractClipItem *> items;
 479     int itemcount = 0;
 480     for (int i = 0; i < children.count(); ++i) {
 481         AbstractClipItem *item = static_cast <AbstractClipItem *>(children.at(i));
 482         if (item && item->type() == AVWIDGET) {
 483             items << item;
 484             if (info)
 485                 m_resizeInfos << item->info();
 486             item->resizeEnd((int)(m_resizeInfos.at(itemcount).endPos.frames(item->fps())) + diff);
 487             int itemdiff = (int)(item->endPos() - m_resizeInfos.at(itemcount).endPos).frames(item->fps());
 488             if (qAbs(itemdiff) < qAbs(maximum))
 489                 maximum = itemdiff;
 490             ++itemcount;
 491         }
 492     }
 493
 494     for (int i = 0; i < items.count(); ++i)
 495         items.at(i)->resizeEnd((int)(m_resizeInfos.at(i).endPos.frames(items.at(i)->fps())) + maximum);
 496 }
 497
 498 QList< ItemInfo > AbstractGroupItem::resizeInfos()
 499 {
 500     return m_resizeInfos;
 501 }
 502
 503 void AbstractGroupItem::clearResizeInfos()
 504 {
 505     // m_resizeInfos.clear() will crash in some cases for unknown reasons - ttill
 506     m_resizeInfos = QList <ItemInfo>();
 507 }
 508
 509 GenTime AbstractGroupItem::duration()
 510 {
 511     QList <QGraphicsItem *> children = childItems();
 512     GenTime start = GenTime(-1.0);
 513     GenTime end = GenTime();
 514     for (int i = 0; i < children.count(); ++i) {
 515         if (children.at(i)->type() != GROUPWIDGET) {
 516             AbstractClipItem *item = static_cast <AbstractClipItem *>(children.at(i));
 517             if (item) {
 518                 if (start < GenTime() || item->startPos() < start)
 519                     start = item->startPos();
 520                 if (item->endPos() > end)
 521                     end = item->endPos();
 522             }
 523         } else {
 524             children << children.at(i)->childItems();
 525         }
 526     }
 527     return end - start;
 528 }