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