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 AbstractGroupItem::AbstractGroupItem(double /* fps */) :
  36         QObject(),
  37         QGraphicsItemGroup()
  38 {
  39     setZValue(1);
  40     setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
  41 #if QT_VERSION >= 0x040600
  42     setFlag(QGraphicsItem::ItemSendsGeometryChanges, true);
  43 #endif
  44     setAcceptDrops(true);
  45 }
  46
  47 int AbstractGroupItem::type() const
  48 {
  49     return GROUPWIDGET;
  50 }
  51
  52 int AbstractGroupItem::track() const
  53 {
  54     return (int)(scenePos().y() / KdenliveSettings::trackheight());
  55 }
  56
  57 void AbstractGroupItem::setItemLocked(bool locked)
  58 {
  59     if (locked) {
  60         setSelected(false);
  61         setFlag(QGraphicsItem::ItemIsMovable, false);
  62         setFlag(QGraphicsItem::ItemIsSelectable, false);
  63     } else {
  64         setFlag(QGraphicsItem::ItemIsMovable, true);
  65         setFlag(QGraphicsItem::ItemIsSelectable, true);
  66     }
  67 }
  68
  69 bool AbstractGroupItem::isItemLocked() const
  70 {
  71     return !(flags() & (QGraphicsItem::ItemIsSelectable));
  72 }
  73
  74 CustomTrackScene* AbstractGroupItem::projectScene()
  75 {
  76     if (scene()) return static_cast <CustomTrackScene*>(scene());
  77     return NULL;
  78 }
  79
  80 QPainterPath AbstractGroupItem::clipGroupShape(QPointF offset) const
  81 {
  82     QPainterPath path;
  83     QList<QGraphicsItem *> children = childItems();
  84     for (int i = 0; i < children.count(); i++) {
  85         if (children.at(i)->type() == AVWIDGET) {
  86             QRectF r(children.at(i)->sceneBoundingRect());
  87             r.translate(offset);
  88             path.addRect(r);
  89         } else if (children.at(i)->type() == GROUPWIDGET) {
  90             QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
  91             for (int j = 0; j < subchildren.count(); j++) {
  92                 if (subchildren.at(j)->type() == AVWIDGET) {
  93                     QRectF r(subchildren.at(j)->sceneBoundingRect());
  94                     r.translate(offset);
  95                     path.addRect(r);
  96                 }
  97             }
  98         }
  99     }
 100     return path;
 101 }
 102
 103 QPainterPath AbstractGroupItem::transitionGroupShape(QPointF offset) const
 104 {
 105     QPainterPath path;
 106     QList<QGraphicsItem *> children = childItems();
 107     for (int i = 0; i < children.count(); i++) {
 108         if (children.at(i)->type() == TRANSITIONWIDGET) {
 109             QRectF r(children.at(i)->sceneBoundingRect());
 110             r.translate(offset);
 111             path.addRect(r);
 112         } else if (children.at(i)->type() == GROUPWIDGET) {
 113             QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 114             for (int j = 0; j < subchildren.count(); j++) {
 115                 if (subchildren.at(j)->type() == TRANSITIONWIDGET) {
 116                     QRectF r(subchildren.at(j)->sceneBoundingRect());
 117                     r.translate(offset);
 118                     path.addRect(r);
 119                 }
 120             }
 121         }
 122     }
 123     return path;
 124 }
 125
 126 void AbstractGroupItem::addItem(QGraphicsItem * item)
 127 {
 128     addToGroup(item);
 129     //fixItemRect();
 130 }
 131
 132 void AbstractGroupItem::fixItemRect()
 133 {
 134     QPointF start = boundingRect().topLeft();
 135     if (start != QPointF(0, 0)) {
 136         translate(0 - start.x(), 0 - start.y());
 137         setPos(start);
 138     }
 139 }
 140
 141 /*ItemInfo AbstractGroupItem::info() const {
 142     ItemInfo itemInfo;
 143     itemInfo.startPos = m_startPos;
 144     itemInfo.track = m_track;
 145     return itemInfo;
 146 }*/
 147
 148 // virtual
 149 void AbstractGroupItem::paint(QPainter *p, const QStyleOptionGraphicsItem *option, QWidget *)
 150 {
 151     const double scale = option->matrix.m11();
 152     QColor bgcolor(100, 100, 200, 100);
 153     QRectF bound = option->exposedRect.adjusted(0, 0, 1, 1);
 154     p->setClipRect(bound);
 155     p->fillRect(option->exposedRect, bgcolor);
 156     QPen pen = p->pen();
 157     pen.setColor(QColor(200, 90, 90));
 158     pen.setStyle(Qt::DashLine);
 159     pen.setWidthF(0.0);
 160     //pen.setCosmetic(true);
 161     p->setPen(pen);
 162     p->drawRect(boundingRect().adjusted(0, 0, - 1 / scale, 0));
 163 }
 164
 165 //virtual
 166 QVariant AbstractGroupItem::itemChange(GraphicsItemChange change, const QVariant &value)
 167 {
 168     if (change == QGraphicsItem::ItemSelectedChange) {
 169         if (value.toBool()) setZValue(10);
 170         else setZValue(1);
 171     }
 172     if (change == ItemPositionChange && scene() && parentItem() == 0) {
 173         // calculate new position.
 174         const int trackHeight = KdenliveSettings::trackheight();
 175         QPointF start = sceneBoundingRect().topLeft();
 176         QPointF newPos = value.toPointF();
 177         int xpos = projectScene()->getSnapPointForPos((int)(start.x() + newPos.x() - pos().x()), KdenliveSettings::snaptopoints());
 178
 179         xpos = qMax(xpos, 0);
 180         //kDebug()<<"GRP XPOS:"<<xpos<<", START:"<<start.x()<<",NEW:"<<newPos.x()<<"; SCENE:"<<scenePos().x()<<",POS:"<<pos().x();
 181         newPos.setX((int)(pos().x() + xpos - (int) start.x()));
 182
 183         //int startTrack = (start.y() + trackHeight / 2) / trackHeight;
 184
 185         int realTrack = (start.y() + newPos.y() - pos().y()) / trackHeight;
 186         int proposedTrack = newPos.y() / trackHeight;
 187
 188         int correctedTrack = qMin(realTrack, projectScene()->tracksCount() - (int)(boundingRect().height() + 5) / trackHeight);
 189         correctedTrack = qMax(correctedTrack, 0);
 190
 191         proposedTrack += (correctedTrack - realTrack);
 192
 193         // Check if top item is a clip or a transition
 194         int offset = 0;
 195         int topTrack = -1;
 196         QList<QGraphicsItem *> children = childItems();
 197         for (int i = 0; i < children.count(); i++) {
 198             int currentTrack = (int)(children.at(i)->scenePos().y() / trackHeight);
 199             if (children.at(i)->type() == AVWIDGET) {
 200                 if (topTrack == -1 || currentTrack <= topTrack) {
 201                     offset = 0;
 202                     topTrack = currentTrack;
 203                 }
 204             } else if (children.at(i)->type() == TRANSITIONWIDGET) {
 205                 if (topTrack == -1 || currentTrack < topTrack) {
 206                     offset = (int)(trackHeight / 3 * 2 - 1);
 207                     topTrack = currentTrack;
 208                 }
 209             } else if (children.at(i)->type() == GROUPWIDGET) {
 210                 QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 211                 bool clipGroup = false;
 212                 for (int j = 0; j < subchildren.count(); j++) {
 213                     if (subchildren.at(j)->type() == AVWIDGET) {
 214                         clipGroup = true;
 215                         break;
 216                     }
 217                 }
 218                 if (clipGroup) {
 219                     if (topTrack == -1 || currentTrack <= topTrack) {
 220                         offset = 0;
 221                         topTrack = currentTrack;
 222                     }
 223                 } else {
 224                     if (topTrack == -1 || currentTrack < topTrack) {
 225                         offset = (int)(trackHeight / 3 * 2 - 1);
 226                         topTrack = currentTrack;
 227                     }
 228                 }
 229             }
 230         }
 231         newPos.setY((int)((proposedTrack) * trackHeight) + offset);
 232         //if (newPos == start) return start;
 233
 234         /*if (newPos.x() < 0) {
 235             // If group goes below 0, adjust position to 0
 236             return QPointF(pos().x() - start.x(), pos().y());
 237         }*/
 238
 239         QList<QGraphicsItem*> collidingItems;
 240         QPainterPath shape;
 241         if (projectScene()->editMode() == NORMALEDIT) {
 242             shape = clipGroupShape(newPos - pos());
 243             collidingItems = scene()->items(shape, Qt::IntersectsItemShape);
 244             collidingItems.removeAll(this);
 245             for (int i = 0; i < children.count(); i++) {
 246                 if (children.at(i)->type() == GROUPWIDGET) {
 247                     QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 248                     for (int j = 0; j < subchildren.count(); j++) {
 249                         collidingItems.removeAll(subchildren.at(j));
 250                     }
 251                 }
 252                 collidingItems.removeAll(children.at(i));
 253             }
 254         }
 255         if (!collidingItems.isEmpty()) {
 256             bool forwardMove = xpos > start.x();
 257             int offset = 0;
 258             for (int i = 0; i < collidingItems.count(); i++) {
 259                 QGraphicsItem *collision = collidingItems.at(i);
 260                 if (collision->type() == AVWIDGET) {
 261                     // Collision
 262                     if (newPos.y() != pos().y()) {
 263                         // Track change results in collision, restore original position
 264                         return pos();
 265                     }
 266                     AbstractClipItem *item = static_cast <AbstractClipItem *>(collision);
 267                     if (forwardMove) {
 268                         // Moving forward, determine best pos
 269                         QPainterPath clipPath;
 270                         clipPath.addRect(item->sceneBoundingRect());
 271                         QPainterPath res = shape.intersected(clipPath);
 272                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 273                     } else {
 274                         // Moving backward, determine best pos
 275                         QPainterPath clipPath;
 276                         clipPath.addRect(item->sceneBoundingRect());
 277                         QPainterPath res = shape.intersected(clipPath);
 278                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 279                     }
 280                 }
 281             }
 282             if (offset > 0) {
 283                 if (forwardMove) {
 284                     newPos.setX(newPos.x() - offset);
 285                 } else {
 286                     newPos.setX(newPos.x() + offset);
 287                 }
 288                 // If there is still a collision after our position adjust, restore original pos
 289                 collidingItems = scene()->items(clipGroupShape(newPos - pos()), Qt::IntersectsItemShape);
 290                 collidingItems.removeAll(this);
 291                 for (int i = 0; i < children.count(); i++) {
 292                     if (children.at(i)->type() == GROUPWIDGET) {
 293                         QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 294                         for (int j = 0; j < subchildren.count(); j++) {
 295                             collidingItems.removeAll(subchildren.at(j));
 296                         }
 297                     }
 298                     collidingItems.removeAll(children.at(i));
 299                 }
 300                 for (int i = 0; i < collidingItems.count(); i++)
 301                     if (collidingItems.at(i)->type() == AVWIDGET) return pos();
 302             }
 303         }
 304
 305         if (projectScene()->editMode() == NORMALEDIT) {
 306             shape = transitionGroupShape(newPos - pos());
 307             collidingItems = scene()->items(shape, Qt::IntersectsItemShape);
 308             collidingItems.removeAll(this);
 309             for (int i = 0; i < children.count(); i++) {
 310                 if (children.at(i)->type() == GROUPWIDGET) {
 311                     QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 312                     for (int j = 0; j < subchildren.count(); j++) {
 313                         collidingItems.removeAll(subchildren.at(j));
 314                     }
 315                 }
 316                 collidingItems.removeAll(children.at(i));
 317             }
 318         }
 319         if (collidingItems.isEmpty()) return newPos;
 320         else {
 321             bool forwardMove = xpos > start.x();
 322             int offset = 0;
 323             for (int i = 0; i < collidingItems.count(); i++) {
 324                 QGraphicsItem *collision = collidingItems.at(i);
 325                 if (collision->type() == TRANSITIONWIDGET) {
 326                     // Collision
 327                     if (newPos.y() != pos().y()) {
 328                         // Track change results in collision, restore original position
 329                         return pos();
 330                     }
 331                     AbstractClipItem *item = static_cast <AbstractClipItem *>(collision);
 332                     if (forwardMove) {
 333                         // Moving forward, determine best pos
 334                         QPainterPath clipPath;
 335                         clipPath.addRect(item->sceneBoundingRect());
 336                         QPainterPath res = shape.intersected(clipPath);
 337                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 338                     } else {
 339                         // Moving backward, determine best pos
 340                         QPainterPath clipPath;
 341                         clipPath.addRect(item->sceneBoundingRect());
 342                         QPainterPath res = shape.intersected(clipPath);
 343                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 344                     }
 345                 }
 346             }
 347             if (offset > 0) {
 348                 if (forwardMove) {
 349                     newPos.setX(newPos.x() - offset);
 350                 } else {
 351                     newPos.setX(newPos.x() + offset);
 352                 }
 353                 // If there is still a collision after our position adjust, restore original pos
 354                 collidingItems = scene()->items(transitionGroupShape(newPos - pos()), Qt::IntersectsItemShape);
 355                 for (int i = 0; i < children.count(); i++) {
 356                     collidingItems.removeAll(children.at(i));
 357                 }
 358                 for (int i = 0; i < collidingItems.count(); i++)
 359                     if (collidingItems.at(i)->type() == TRANSITIONWIDGET) return pos();
 360             }
 361         }
 362         return newPos;
 363     }
 364     return QGraphicsItemGroup::itemChange(change, value);
 365 }
 366
 367 //virtual
 368 void AbstractGroupItem::dropEvent(QGraphicsSceneDragDropEvent * event)
 369 {
 370     QString effects = QString(event->mimeData()->data("kdenlive/effectslist"));
 371     QDomDocument doc;
 372     doc.setContent(effects, true);
 373     QDomElement e = doc.documentElement();
 374     CustomTrackView *view = (CustomTrackView *) scene()->views()[0];
 375     if (view) view->slotAddGroupEffect(e, this);
 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 QGraphicsItem::mousePressEvent(event);
 396 }