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     return groupShape(AVWIDGET, offset);
  83 }
  84
  85 QPainterPath AbstractGroupItem::transitionGroupShape(QPointF offset) const
  86 {
  87     return groupShape(TRANSITIONWIDGET, offset);
  88 }
  89
  90 QPainterPath AbstractGroupItem::groupShape(GRAPHICSRECTITEM type, QPointF offset) const
  91 {
  92     QPainterPath path;
  93     QList<QGraphicsItem *> children = childItems();
  94     for (int i = 0; i < children.count(); i++) {
  95         if (children.at(i)->type() == (int)type) {
  96             QRectF r(children.at(i)->sceneBoundingRect());
  97             r.translate(offset);
  98             path.addRect(r);
  99         } else if (children.at(i)->type() == GROUPWIDGET) {
 100             QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 101             for (int j = 0; j < subchildren.count(); j++) {
 102                 if (subchildren.at(j)->type() == (int)type) {
 103                     QRectF r(subchildren.at(j)->sceneBoundingRect());
 104                     r.translate(offset);
 105                     path.addRect(r);
 106                 }
 107             }
 108         }
 109     }
 110     return path;
 111 }
 112
 113 void AbstractGroupItem::addItem(QGraphicsItem * item)
 114 {
 115     addToGroup(item);
 116     //fixItemRect();
 117 }
 118
 119 void AbstractGroupItem::fixItemRect()
 120 {
 121     QPointF start = boundingRect().topLeft();
 122     if (start != QPointF(0, 0)) {
 123         translate(0 - start.x(), 0 - start.y());
 124         setPos(start);
 125     }
 126 }
 127
 128 /*ItemInfo AbstractGroupItem::info() const {
 129     ItemInfo itemInfo;
 130     itemInfo.startPos = m_startPos;
 131     itemInfo.track = m_track;
 132     return itemInfo;
 133 }*/
 134
 135 // virtual
 136 void AbstractGroupItem::paint(QPainter *p, const QStyleOptionGraphicsItem *option, QWidget *)
 137 {
 138     const double scale = option->matrix.m11();
 139     QColor bgcolor(100, 100, 200, 100);
 140     QRectF bound = option->exposedRect.adjusted(0, 0, 1, 1);
 141     p->setClipRect(bound);
 142     p->fillRect(option->exposedRect, bgcolor);
 143     QPen pen = p->pen();
 144     pen.setColor(QColor(200, 90, 90));
 145     pen.setStyle(Qt::DashLine);
 146     pen.setWidthF(0.0);
 147     //pen.setCosmetic(true);
 148     p->setPen(pen);
 149     p->drawRect(boundingRect().adjusted(0, 0, - 1 / scale, 0));
 150 }
 151
 152 //virtual
 153 QVariant AbstractGroupItem::itemChange(GraphicsItemChange change, const QVariant &value)
 154 {
 155     if (change == QGraphicsItem::ItemSelectedChange) {
 156         if (value.toBool()) setZValue(10);
 157         else setZValue(1);
 158     }
 159     if (change == ItemPositionChange && scene() && parentItem() == 0) {
 160         // calculate new position.
 161         const int trackHeight = KdenliveSettings::trackheight();
 162         QPointF start = sceneBoundingRect().topLeft();
 163         QPointF newPos = value.toPointF();
 164         int xpos = projectScene()->getSnapPointForPos((int)(start.x() + newPos.x() - pos().x()), KdenliveSettings::snaptopoints());
 165
 166         xpos = qMax(xpos, 0);
 167         //kDebug()<<"GRP XPOS:"<<xpos<<", START:"<<start.x()<<",NEW:"<<newPos.x()<<"; SCENE:"<<scenePos().x()<<",POS:"<<pos().x();
 168         newPos.setX((int)(pos().x() + xpos - (int) start.x()));
 169
 170         //int startTrack = (start.y() + trackHeight / 2) / trackHeight;
 171
 172         int realTrack = (start.y() + newPos.y() - pos().y()) / trackHeight;
 173         int proposedTrack = newPos.y() / trackHeight;
 174
 175         int correctedTrack = qMin(realTrack, projectScene()->tracksCount() - (int)(boundingRect().height() + 5) / trackHeight);
 176         correctedTrack = qMax(correctedTrack, 0);
 177
 178         proposedTrack += (correctedTrack - realTrack);
 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 = (int)(children.at(i)->scenePos().y() / trackHeight);
 186             if (children.at(i)->type() == AVWIDGET) {
 187                 if (topTrack == -1 || currentTrack <= topTrack) {
 188                     offset = 0;
 189                     topTrack = currentTrack;
 190                 }
 191             } else if (children.at(i)->type() == TRANSITIONWIDGET) {
 192                 if (topTrack == -1 || currentTrack < topTrack) {
 193                     offset = (int)(trackHeight / 3 * 2 - 1);
 194                     topTrack = currentTrack;
 195                 }
 196             } else if (children.at(i)->type() == GROUPWIDGET) {
 197                 QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 198                 bool clipGroup = false;
 199                 for (int j = 0; j < subchildren.count(); j++) {
 200                     if (subchildren.at(j)->type() == AVWIDGET) {
 201                         clipGroup = true;
 202                         break;
 203                     }
 204                 }
 205                 if (clipGroup) {
 206                     if (topTrack == -1 || currentTrack <= topTrack) {
 207                         offset = 0;
 208                         topTrack = currentTrack;
 209                     }
 210                 } else {
 211                     if (topTrack == -1 || currentTrack < topTrack) {
 212                         offset = (int)(trackHeight / 3 * 2 - 1);
 213                         topTrack = currentTrack;
 214                     }
 215                 }
 216             }
 217         }
 218         newPos.setY((int)((proposedTrack) * trackHeight) + offset);
 219         //if (newPos == start) return start;
 220
 221         /*if (newPos.x() < 0) {
 222             // If group goes below 0, adjust position to 0
 223             return QPointF(pos().x() - start.x(), pos().y());
 224         }*/
 225
 226         QList<QGraphicsItem*> collidingItems;
 227         QPainterPath shape;
 228         if (projectScene()->editMode() == NORMALEDIT) {
 229             shape = clipGroupShape(newPos - pos());
 230             collidingItems = scene()->items(shape, Qt::IntersectsItemShape);
 231             collidingItems.removeAll(this);
 232             for (int i = 0; i < children.count(); i++) {
 233                 if (children.at(i)->type() == GROUPWIDGET) {
 234                     QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 235                     for (int j = 0; j < subchildren.count(); j++) {
 236                         collidingItems.removeAll(subchildren.at(j));
 237                     }
 238                 }
 239                 collidingItems.removeAll(children.at(i));
 240             }
 241         }
 242         if (!collidingItems.isEmpty()) {
 243             bool forwardMove = xpos > start.x();
 244             int offset = 0;
 245             for (int i = 0; i < collidingItems.count(); i++) {
 246                 QGraphicsItem *collision = collidingItems.at(i);
 247                 if (collision->type() == AVWIDGET) {
 248                     // Collision
 249                     if (newPos.y() != pos().y()) {
 250                         // Track change results in collision, restore original position
 251                         return pos();
 252                     }
 253                     AbstractClipItem *item = static_cast <AbstractClipItem *>(collision);
 254                     if (forwardMove) {
 255                         // Moving forward, determine best pos
 256                         QPainterPath clipPath;
 257                         clipPath.addRect(item->sceneBoundingRect());
 258                         QPainterPath res = shape.intersected(clipPath);
 259                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 260                     } else {
 261                         // Moving backward, determine best pos
 262                         QPainterPath clipPath;
 263                         clipPath.addRect(item->sceneBoundingRect());
 264                         QPainterPath res = shape.intersected(clipPath);
 265                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 266                     }
 267                 }
 268             }
 269             if (offset > 0) {
 270                 if (forwardMove) {
 271                     newPos.setX(newPos.x() - offset);
 272                 } else {
 273                     newPos.setX(newPos.x() + offset);
 274                 }
 275                 // If there is still a collision after our position adjust, restore original pos
 276                 collidingItems = scene()->items(clipGroupShape(newPos - pos()), Qt::IntersectsItemShape);
 277                 collidingItems.removeAll(this);
 278                 for (int i = 0; i < children.count(); i++) {
 279                     if (children.at(i)->type() == GROUPWIDGET) {
 280                         QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 281                         for (int j = 0; j < subchildren.count(); j++) {
 282                             collidingItems.removeAll(subchildren.at(j));
 283                         }
 284                     }
 285                     collidingItems.removeAll(children.at(i));
 286                 }
 287                 for (int i = 0; i < collidingItems.count(); i++)
 288                     if (collidingItems.at(i)->type() == AVWIDGET) return pos();
 289             }
 290         }
 291
 292         if (projectScene()->editMode() == NORMALEDIT) {
 293             shape = transitionGroupShape(newPos - pos());
 294             collidingItems = scene()->items(shape, Qt::IntersectsItemShape);
 295             collidingItems.removeAll(this);
 296             for (int i = 0; i < children.count(); i++) {
 297                 if (children.at(i)->type() == GROUPWIDGET) {
 298                     QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 299                     for (int j = 0; j < subchildren.count(); j++) {
 300                         collidingItems.removeAll(subchildren.at(j));
 301                     }
 302                 }
 303                 collidingItems.removeAll(children.at(i));
 304             }
 305         }
 306         if (collidingItems.isEmpty()) return newPos;
 307         else {
 308             bool forwardMove = xpos > start.x();
 309             int offset = 0;
 310             for (int i = 0; i < collidingItems.count(); i++) {
 311                 QGraphicsItem *collision = collidingItems.at(i);
 312                 if (collision->type() == TRANSITIONWIDGET) {
 313                     // Collision
 314                     if (newPos.y() != pos().y()) {
 315                         // Track change results in collision, restore original position
 316                         return pos();
 317                     }
 318                     AbstractClipItem *item = static_cast <AbstractClipItem *>(collision);
 319                     if (forwardMove) {
 320                         // Moving forward, determine best pos
 321                         QPainterPath clipPath;
 322                         clipPath.addRect(item->sceneBoundingRect());
 323                         QPainterPath res = shape.intersected(clipPath);
 324                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 325                     } else {
 326                         // Moving backward, determine best pos
 327                         QPainterPath clipPath;
 328                         clipPath.addRect(item->sceneBoundingRect());
 329                         QPainterPath res = shape.intersected(clipPath);
 330                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 331                     }
 332                 }
 333             }
 334             if (offset > 0) {
 335                 if (forwardMove) {
 336                     newPos.setX(newPos.x() - offset);
 337                 } else {
 338                     newPos.setX(newPos.x() + offset);
 339                 }
 340                 // If there is still a collision after our position adjust, restore original pos
 341                 collidingItems = scene()->items(transitionGroupShape(newPos - pos()), Qt::IntersectsItemShape);
 342                 for (int i = 0; i < children.count(); i++) {
 343                     collidingItems.removeAll(children.at(i));
 344                 }
 345                 for (int i = 0; i < collidingItems.count(); i++)
 346                     if (collidingItems.at(i)->type() == TRANSITIONWIDGET) return pos();
 347             }
 348         }
 349         return newPos;
 350     }
 351     return QGraphicsItemGroup::itemChange(change, value);
 352 }
 353
 354 //virtual
 355 void AbstractGroupItem::dropEvent(QGraphicsSceneDragDropEvent * event)
 356 {
 357     QString effects = QString(event->mimeData()->data("kdenlive/effectslist"));
 358     QDomDocument doc;
 359     doc.setContent(effects, true);
 360     QDomElement e = doc.documentElement();
 361     CustomTrackView *view = (CustomTrackView *) scene()->views()[0];
 362     if (view) view->slotAddGroupEffect(e, this);
 363 }
 364
 365 //virtual
 366 void AbstractGroupItem::dragEnterEvent(QGraphicsSceneDragDropEvent *event)
 367 {
 368     event->setAccepted(event->mimeData()->hasFormat("kdenlive/effectslist"));
 369 }
 370
 371 void AbstractGroupItem::dragLeaveEvent(QGraphicsSceneDragDropEvent *event)
 372 {
 373     Q_UNUSED(event);
 374 }
 375
 376 // virtual
 377 void AbstractGroupItem::mousePressEvent(QGraphicsSceneMouseEvent * event)
 378 {
 379     if (event->modifiers() & Qt::ShiftModifier) {
 380         // User want to do a rectangle selection, so ignore the event to pass it to the view
 381         event->ignore();
 382     } else QGraphicsItem::mousePressEvent(event);
 383 }