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
 177         int yOffset = property("y_absolute").toInt() + newPos.y();
 178         int proposedTrack = yOffset / trackHeight;
 179
 180         // Check if top item is a clip or a transition
 181         int offset = 0;
 182         int topTrack = -1;
 183         QList<QGraphicsItem *> children = childItems();
 184         for (int i = 0; i < children.count(); i++) {
 185             int currentTrack = 0;
 186             if (children.at(i)->type() == AVWIDGET || children.at(i)->type() == TRANSITIONWIDGET) currentTrack = static_cast <AbstractClipItem*> (children.at(i))->track();
 187             else if (children.at(i)->type() == GROUPWIDGET) currentTrack = static_cast <AbstractGroupItem*> (children.at(i))->track();
 188             else continue;
 189             if (children.at(i)->type() == AVWIDGET) {
 190                 if (topTrack == -1 || currentTrack <= topTrack) {
 191                     offset = 0;
 192                     topTrack = currentTrack;
 193                 }
 194             } else if (children.at(i)->type() == TRANSITIONWIDGET) {
 195                 if (topTrack == -1 || currentTrack < topTrack) {
 196                     offset = (int)(trackHeight / 3 * 2 - 1);
 197                     topTrack = currentTrack;
 198                 }
 199             } else if (children.at(i)->type() == GROUPWIDGET) {
 200                 QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 201                 bool clipGroup = false;
 202                 for (int j = 0; j < subchildren.count(); j++) {
 203                     if (subchildren.at(j)->type() == AVWIDGET) {
 204                         clipGroup = true;
 205                         break;
 206                     }
 207                 }
 208                 if (clipGroup) {
 209                     if (topTrack == -1 || currentTrack <= topTrack) {
 210                         offset = 0;
 211                         topTrack = currentTrack;
 212                     }
 213                 } else {
 214                     if (topTrack == -1 || currentTrack < topTrack) {
 215                         offset = (int)(trackHeight / 3 * 2 - 1);
 216                         topTrack = currentTrack;
 217                     }
 218                 }
 219             }
 220         }
 221         newPos.setY((int)((proposedTrack) * trackHeight) + offset);
 222         //if (newPos == start) return start;
 223
 224         /*if (newPos.x() < 0) {
 225             // If group goes below 0, adjust position to 0
 226             return QPointF(pos().x() - start.x(), pos().y());
 227         }*/
 228
 229         QList<QGraphicsItem*> collidingItems;
 230         QPainterPath shape;
 231         if (projectScene()->editMode() == NORMALEDIT) {
 232             shape = clipGroupShape(newPos - pos());
 233             collidingItems = scene()->items(shape, Qt::IntersectsItemShape);
 234             collidingItems.removeAll(this);
 235             for (int i = 0; i < children.count(); i++) {
 236                 if (children.at(i)->type() == GROUPWIDGET) {
 237                     QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 238                     for (int j = 0; j < subchildren.count(); j++) {
 239                         collidingItems.removeAll(subchildren.at(j));
 240                     }
 241                 }
 242                 collidingItems.removeAll(children.at(i));
 243             }
 244         }
 245         if (!collidingItems.isEmpty()) {
 246             bool forwardMove = xpos > start.x();
 247             int offset = 0;
 248             for (int i = 0; i < collidingItems.count(); i++) {
 249                 QGraphicsItem *collision = collidingItems.at(i);
 250                 if (collision->type() == AVWIDGET) {
 251                     // Collision
 252                     if (newPos.y() != pos().y()) {
 253                         // Track change results in collision, restore original position
 254                         return pos();
 255                     }
 256                     AbstractClipItem *item = static_cast <AbstractClipItem *>(collision);
 257                     if (forwardMove) {
 258                         // Moving forward, determine best pos
 259                         QPainterPath clipPath;
 260                         clipPath.addRect(item->sceneBoundingRect());
 261                         QPainterPath res = shape.intersected(clipPath);
 262                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 263                     } else {
 264                         // Moving backward, determine best pos
 265                         QPainterPath clipPath;
 266                         clipPath.addRect(item->sceneBoundingRect());
 267                         QPainterPath res = shape.intersected(clipPath);
 268                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 269                     }
 270                 }
 271             }
 272             if (offset > 0) {
 273                 if (forwardMove) {
 274                     newPos.setX(newPos.x() - offset);
 275                 } else {
 276                     newPos.setX(newPos.x() + offset);
 277                 }
 278                 // If there is still a collision after our position adjust, restore original pos
 279                 collidingItems = scene()->items(clipGroupShape(newPos - pos()), Qt::IntersectsItemShape);
 280                 collidingItems.removeAll(this);
 281                 for (int i = 0; i < children.count(); i++) {
 282                     if (children.at(i)->type() == GROUPWIDGET) {
 283                         QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 284                         for (int j = 0; j < subchildren.count(); j++) {
 285                             collidingItems.removeAll(subchildren.at(j));
 286                         }
 287                     }
 288                     collidingItems.removeAll(children.at(i));
 289                 }
 290                 for (int i = 0; i < collidingItems.count(); i++)
 291                     if (collidingItems.at(i)->type() == AVWIDGET) return pos();
 292             }
 293         }
 294
 295         if (projectScene()->editMode() == NORMALEDIT) {
 296             shape = transitionGroupShape(newPos - pos());
 297             collidingItems = scene()->items(shape, Qt::IntersectsItemShape);
 298             collidingItems.removeAll(this);
 299             for (int i = 0; i < children.count(); i++) {
 300                 if (children.at(i)->type() == GROUPWIDGET) {
 301                     QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 302                     for (int j = 0; j < subchildren.count(); j++) {
 303                         collidingItems.removeAll(subchildren.at(j));
 304                     }
 305                 }
 306                 collidingItems.removeAll(children.at(i));
 307             }
 308         }
 309         if (collidingItems.isEmpty()) return newPos;
 310         else {
 311             bool forwardMove = xpos > start.x();
 312             int offset = 0;
 313             for (int i = 0; i < collidingItems.count(); i++) {
 314                 QGraphicsItem *collision = collidingItems.at(i);
 315                 if (collision->type() == TRANSITIONWIDGET) {
 316                     // Collision
 317                     if (newPos.y() != pos().y()) {
 318                         // Track change results in collision, restore original position
 319                         return pos();
 320                     }
 321                     AbstractClipItem *item = static_cast <AbstractClipItem *>(collision);
 322                     if (forwardMove) {
 323                         // Moving forward, determine best pos
 324                         QPainterPath clipPath;
 325                         clipPath.addRect(item->sceneBoundingRect());
 326                         QPainterPath res = shape.intersected(clipPath);
 327                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 328                     } else {
 329                         // Moving backward, determine best pos
 330                         QPainterPath clipPath;
 331                         clipPath.addRect(item->sceneBoundingRect());
 332                         QPainterPath res = shape.intersected(clipPath);
 333                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 334                     }
 335                 }
 336             }
 337             if (offset > 0) {
 338                 if (forwardMove) {
 339                     newPos.setX(newPos.x() - offset);
 340                 } else {
 341                     newPos.setX(newPos.x() + offset);
 342                 }
 343                 // If there is still a collision after our position adjust, restore original pos
 344                 collidingItems = scene()->items(transitionGroupShape(newPos - pos()), Qt::IntersectsItemShape);
 345                 for (int i = 0; i < children.count(); i++) {
 346                     collidingItems.removeAll(children.at(i));
 347                 }
 348                 for (int i = 0; i < collidingItems.count(); i++)
 349                     if (collidingItems.at(i)->type() == TRANSITIONWIDGET) return pos();
 350             }
 351         }
 352         return newPos;
 353     }
 354     return QGraphicsItemGroup::itemChange(change, value);
 355 }
 356
 357 //virtual
 358 void AbstractGroupItem::dropEvent(QGraphicsSceneDragDropEvent * event)
 359 {
 360     QString effects = QString::fromUtf8(event->mimeData()->data("kdenlive/effectslist"));
 361     QDomDocument doc;
 362     doc.setContent(effects, true);
 363     QDomElement e = doc.documentElement();
 364     e.setAttribute("kdenlive_ix", 0);
 365     CustomTrackView *view = (CustomTrackView *) scene()->views()[0];
 366     QPointF dropPos = event->scenePos();
 367     QList<QGraphicsItem *> selection = scene()->items(dropPos);
 368     AbstractClipItem *dropChild = NULL;
 369     for (int i = 0; i < selection.count(); i++) {
 370         if (selection.at(i)->type() == AVWIDGET) {
 371             dropChild = (AbstractClipItem *) selection.at(i);
 372             break;
 373         }
 374     }
 375     if (view) view->slotAddGroupEffect(e, this, dropChild);
 376 }
 377
 378 //virtual
 379 void AbstractGroupItem::dragEnterEvent(QGraphicsSceneDragDropEvent *event)
 380 {
 381     event->setAccepted(event->mimeData()->hasFormat("kdenlive/effectslist"));
 382 }
 383
 384 void AbstractGroupItem::dragLeaveEvent(QGraphicsSceneDragDropEvent *event)
 385 {
 386     Q_UNUSED(event)
 387 }
 388
 389 // virtual
 390 void AbstractGroupItem::mousePressEvent(QGraphicsSceneMouseEvent * event)
 391 {
 392     if (event->modifiers() & Qt::ShiftModifier) {
 393         // User want to do a rectangle selection, so ignore the event to pass it to the view
 394         event->ignore();
 395     } else {
 396         QList <QGraphicsItem *>list = scene()->items(event->scenePos());
 397         // only allow group move if we click over an item in the group
 398         foreach(const QGraphicsItem *item, list) {
 399             if (item->type() == TRANSITIONWIDGET || item->type() == AVWIDGET) {
 400                 QGraphicsItem::mousePressEvent(event);
 401                 return;
 402             }
 403         }
 404         event->ignore();
 405     }
 406 }
 407
 408 void AbstractGroupItem::resizeStart(int diff)
 409 {
 410     bool info = false;
 411     if (m_resizeInfos.isEmpty())
 412         info = true;
 413     int maximum = diff;
 414     QList <QGraphicsItem *> children = childItems();
 415     QList <AbstractClipItem *> items;
 416     int itemcount = 0;
 417     for (int i = 0; i < children.count(); ++i) {
 418         AbstractClipItem *item = static_cast <AbstractClipItem *>(children.at(i));
 419         if (item && item->type() == AVWIDGET) {
 420             items << item;
 421             if (info)
 422                 m_resizeInfos << item->info();
 423             item->resizeStart((int)(m_resizeInfos.at(itemcount).startPos.frames(item->fps())) + diff);
 424             int itemdiff = (int)(item->startPos() - m_resizeInfos.at(itemcount).startPos).frames(item->fps());
 425             if (qAbs(itemdiff) < qAbs(maximum))
 426                 maximum = itemdiff;
 427             ++itemcount;
 428         }
 429     }
 430
 431     for (int i = 0; i < items.count(); ++i)
 432         items.at(i)->resizeStart((int)(m_resizeInfos.at(i).startPos.frames(items.at(i)->fps())) + maximum);
 433 }
 434
 435 void AbstractGroupItem::resizeEnd(int diff)
 436 {
 437     bool info = false;
 438     if (m_resizeInfos.isEmpty())
 439         info = true;
 440     int maximum = diff;
 441     QList <QGraphicsItem *> children = childItems();
 442     QList <AbstractClipItem *> items;
 443     int itemcount = 0;
 444     for (int i = 0; i < children.count(); ++i) {
 445         AbstractClipItem *item = static_cast <AbstractClipItem *>(children.at(i));
 446         if (item && item->type() == AVWIDGET) {
 447             items << item;
 448             if (info)
 449                 m_resizeInfos << item->info();
 450             item->resizeEnd((int)(m_resizeInfos.at(itemcount).endPos.frames(item->fps())) + diff);
 451             int itemdiff = (int)(item->endPos() - m_resizeInfos.at(itemcount).endPos).frames(item->fps());
 452             if (qAbs(itemdiff) < qAbs(maximum))
 453                 maximum = itemdiff;
 454             ++itemcount;
 455         }
 456     }
 457
 458     for (int i = 0; i < items.count(); ++i)
 459         items.at(i)->resizeEnd((int)(m_resizeInfos.at(i).endPos.frames(items.at(i)->fps())) + maximum);
 460 }
 461
 462 QList< ItemInfo > AbstractGroupItem::resizeInfos()
 463 {
 464     return m_resizeInfos;
 465 }
 466
 467 void AbstractGroupItem::clearResizeInfos()
 468 {
 469     // m_resizeInfos.clear() will crash in some cases for unknown reasons - ttill
 470     m_resizeInfos = QList <ItemInfo>();
 471 }
 472
 473 GenTime AbstractGroupItem::duration()
 474 {
 475     QList <QGraphicsItem *> children = childItems();
 476     GenTime start = GenTime(-1.0);
 477     GenTime end = GenTime();
 478     for (int i = 0; i < children.count(); ++i) {
 479         if (children.at(i)->type() != GROUPWIDGET) {
 480             AbstractClipItem *item = static_cast <AbstractClipItem *>(children.at(i));
 481             if (item) {
 482                 if (start < GenTime() || item->startPos() < start)
 483                     start = item->startPos();
 484                 if (item->endPos() > end)
 485                     end = item->endPos();
 486             }
 487         } else {
 488             children << children.at(i)->childItems();
 489         }
 490     }
 491     return end - start;
 492 }