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