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