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         }
  90     }
  91     return path;
  92 }
  93
  94 QPainterPath AbstractGroupItem::transitionGroupShape(QPointF offset) const
  95 {
  96     QPainterPath path;
  97     QList<QGraphicsItem *> children = childItems();
  98     for (int i = 0; i < children.count(); i++) {
  99         if (children.at(i)->type() == TRANSITIONWIDGET) {
 100             QRectF r(children.at(i)->sceneBoundingRect());
 101             r.translate(offset);
 102             path.addRect(r);
 103         }
 104     }
 105     return path;
 106 }
 107
 108 void AbstractGroupItem::addItem(QGraphicsItem * item)
 109 {
 110     addToGroup(item);
 111     //fixItemRect();
 112 }
 113
 114 void AbstractGroupItem::fixItemRect()
 115 {
 116     QPointF start = boundingRect().topLeft();
 117     if (start != QPointF(0, 0)) {
 118         translate(0 - start.x(), 0 - start.y());
 119         setPos(start);
 120     }
 121 }
 122
 123 /*ItemInfo AbstractGroupItem::info() const {
 124     ItemInfo itemInfo;
 125     itemInfo.startPos = m_startPos;
 126     itemInfo.track = m_track;
 127     return itemInfo;
 128 }*/
 129
 130 // virtual
 131 void AbstractGroupItem::paint(QPainter *p, const QStyleOptionGraphicsItem *option, QWidget *)
 132 {
 133     const double scale = option->matrix.m11();
 134     QColor bgcolor(100, 100, 200, 100);
 135     QRectF bound = option->exposedRect.adjusted(0, 0, 1, 1);
 136     p->setClipRect(bound);
 137     p->fillRect(option->exposedRect, bgcolor);
 138     QPen pen = p->pen();
 139     pen.setColor(QColor(200, 90, 90));
 140     pen.setStyle(Qt::DashLine);
 141     pen.setWidthF(0.0);
 142     //pen.setCosmetic(true);
 143     p->setPen(pen);
 144     p->drawRect(boundingRect().adjusted(0, 0, - 1 / scale, 0));
 145 }
 146
 147 //virtual
 148 QVariant AbstractGroupItem::itemChange(GraphicsItemChange change, const QVariant &value)
 149 {
 150     if (change == ItemPositionChange && scene() && parentItem() == 0) {
 151         // calculate new position.
 152         const int trackHeight = KdenliveSettings::trackheight();
 153         QPointF start = sceneBoundingRect().topLeft();
 154         QPointF newPos = value.toPointF();
 155         //kDebug()<<"REAL:"<<start.x()<<", PROPOSED:"<<(int)(start.x() - pos().x() + newPos.x());
 156         int xpos = projectScene()->getSnapPointForPos((int)(start.x() + newPos.x() - pos().x()), KdenliveSettings::snaptopoints());
 157
 158         xpos = qMax(xpos, 0);
 159         //kDebug()<<"GRP XPOS:"<<xpos<<", START:"<<start.x()<<",NEW:"<<newPos.x()<<"; SCENE:"<<scenePos().x()<<",POS:"<<pos().x();
 160         newPos.setX((int)(pos().x() + xpos - (int) start.x()));
 161
 162         //int startTrack = (start.y() + trackHeight / 2) / trackHeight;
 163
 164         int realTrack = (start.y() + newPos.y() - pos().y()) / trackHeight;
 165         int proposedTrack = newPos.y() / trackHeight;
 166
 167         int correctedTrack = qMin(realTrack, projectScene()->tracksCount() - (int)(boundingRect().height() + 5) / trackHeight);
 168         correctedTrack = qMax(correctedTrack, 0);
 169
 170         proposedTrack += (correctedTrack - realTrack);
 171
 172         // Check if top item is a clip or a transition
 173         int offset = 0;
 174         int topTrack = -1;
 175         QList<QGraphicsItem *> children = childItems();
 176         for (int i = 0; i < children.count(); i++) {
 177             int currentTrack = (int)(children.at(i)->scenePos().y() / trackHeight);
 178             if (children.at(i)->type() == AVWIDGET) {
 179                 if (topTrack == -1 || currentTrack <= topTrack) {
 180                     offset = 0;
 181                     topTrack = currentTrack;
 182                 }
 183             } else if (children.at(i)->type() == TRANSITIONWIDGET) {
 184                 if (topTrack == -1 || currentTrack < topTrack) {
 185                     offset = (int)(trackHeight / 3 * 2 - 1);
 186                     topTrack = currentTrack;
 187                 }
 188             } else if (children.at(i)->type() == GROUPWIDGET) {
 189                 QList<QGraphicsItem *> subchildren = children.at(i)->childItems();
 190                 bool clipGroup = false;
 191                 for (int j = 0; j < subchildren.count(); j++) {
 192                     if (subchildren.at(j)->type() == AVWIDGET) {
 193                         clipGroup = true;
 194                         break;
 195                     }
 196                 }
 197                 if (clipGroup) {
 198                     if (topTrack == -1 || currentTrack <= topTrack) {
 199                         offset = 0;
 200                         topTrack = currentTrack;
 201                     }
 202                 } else {
 203                     if (topTrack == -1 || currentTrack < topTrack) {
 204                         offset = (int)(trackHeight / 3 * 2 - 1);
 205                         topTrack = currentTrack;
 206                     }
 207                 }
 208             }
 209         }
 210         newPos.setY((int)((proposedTrack) * trackHeight) + offset);
 211         //if (newPos == start) return start;
 212
 213         /*if (newPos.x() < 0) {
 214             // If group goes below 0, adjust position to 0
 215             return QPointF(pos().x() - start.x(), pos().y());
 216         }*/
 217
 218         QList<QGraphicsItem*> collindingItems;
 219         QPainterPath shape;
 220         if (projectScene()->editMode() == NORMALEDIT) {
 221             shape = clipGroupShape(newPos - pos());
 222             collindingItems = scene()->items(shape, Qt::IntersectsItemShape);
 223             for (int i = 0; i < children.count(); i++) {
 224                 collindingItems.removeAll(children.at(i));
 225             }
 226         }
 227         if (!collindingItems.isEmpty()) {
 228             bool forwardMove = xpos > start.x();
 229             int offset = 0;
 230             for (int i = 0; i < collindingItems.count(); i++) {
 231                 QGraphicsItem *collision = collindingItems.at(i);
 232                 if (collision->type() == AVWIDGET) {
 233                     // Collision
 234                     if (newPos.y() != pos().y()) {
 235                         // Track change results in collision, restore original position
 236                         return pos();
 237                     }
 238                     AbstractClipItem *item = static_cast <AbstractClipItem *>(collision);
 239                     if (forwardMove) {
 240                         // Moving forward, determine best pos
 241                         QPainterPath clipPath;
 242                         clipPath.addRect(item->sceneBoundingRect());
 243                         QPainterPath res = shape.intersected(clipPath);
 244                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 245                     } else {
 246                         // Moving backward, determine best pos
 247                         QPainterPath clipPath;
 248                         clipPath.addRect(item->sceneBoundingRect());
 249                         QPainterPath res = shape.intersected(clipPath);
 250                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 251                     }
 252                 }
 253             }
 254             if (offset > 0) {
 255                 if (forwardMove) {
 256                     newPos.setX(newPos.x() - offset);
 257                 } else {
 258                     newPos.setX(newPos.x() + offset);
 259                 }
 260                 // If there is still a collision after our position adjust, restore original pos
 261                 collindingItems = scene()->items(clipGroupShape(newPos - pos()), Qt::IntersectsItemShape);
 262                 for (int i = 0; i < children.count(); i++) {
 263                     collindingItems.removeAll(children.at(i));
 264                 }
 265                 for (int i = 0; i < collindingItems.count(); i++)
 266                     if (collindingItems.at(i)->type() == AVWIDGET) return pos();
 267             }
 268         }
 269
 270         if (projectScene()->editMode() == NORMALEDIT) {
 271             shape = transitionGroupShape(newPos - pos());
 272             collindingItems = scene()->items(shape, Qt::IntersectsItemShape);
 273             for (int i = 0; i < children.count(); i++) {
 274                 collindingItems.removeAll(children.at(i));
 275             }
 276         }
 277         if (collindingItems.isEmpty()) return newPos;
 278         else {
 279             bool forwardMove = xpos > start.x();
 280             int offset = 0;
 281             for (int i = 0; i < collindingItems.count(); i++) {
 282                 QGraphicsItem *collision = collindingItems.at(i);
 283                 if (collision->type() == TRANSITIONWIDGET) {
 284                     // Collision
 285                     if (newPos.y() != pos().y()) {
 286                         // Track change results in collision, restore original position
 287                         return pos();
 288                     }
 289                     AbstractClipItem *item = static_cast <AbstractClipItem *>(collision);
 290                     if (forwardMove) {
 291                         // Moving forward, determine best pos
 292                         QPainterPath clipPath;
 293                         clipPath.addRect(item->sceneBoundingRect());
 294                         QPainterPath res = shape.intersected(clipPath);
 295                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 296                     } else {
 297                         // Moving backward, determine best pos
 298                         QPainterPath clipPath;
 299                         clipPath.addRect(item->sceneBoundingRect());
 300                         QPainterPath res = shape.intersected(clipPath);
 301                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 302                     }
 303                 }
 304             }
 305             if (offset > 0) {
 306                 if (forwardMove) {
 307                     newPos.setX(newPos.x() - offset);
 308                 } else {
 309                     newPos.setX(newPos.x() + offset);
 310                 }
 311                 // If there is still a collision after our position adjust, restore original pos
 312                 collindingItems = scene()->items(transitionGroupShape(newPos - pos()), Qt::IntersectsItemShape);
 313                 for (int i = 0; i < children.count(); i++) {
 314                     collindingItems.removeAll(children.at(i));
 315                 }
 316                 for (int i = 0; i < collindingItems.count(); i++)
 317                     if (collindingItems.at(i)->type() == TRANSITIONWIDGET) return pos();
 318             }
 319         }
 320         return newPos;
 321     }
 322     return QGraphicsItemGroup::itemChange(change, value);
 323 }
 324
 325 //virtual
 326 void AbstractGroupItem::dropEvent(QGraphicsSceneDragDropEvent * event)
 327 {
 328     QString effects = QString(event->mimeData()->data("kdenlive/effectslist"));
 329     QDomDocument doc;
 330     doc.setContent(effects, true);
 331     QDomElement e = doc.documentElement();
 332     CustomTrackView *view = (CustomTrackView *) scene()->views()[0];
 333     if (view) view->slotAddGroupEffect(e, this);
 334 }
 335
 336 //virtual
 337 void AbstractGroupItem::dragEnterEvent(QGraphicsSceneDragDropEvent *event)
 338 {
 339     event->setAccepted(event->mimeData()->hasFormat("kdenlive/effectslist"));
 340 }
 341
 342 void AbstractGroupItem::dragLeaveEvent(QGraphicsSceneDragDropEvent *event)
 343 {
 344     Q_UNUSED(event);
 345 }
 346
 347 // virtual
 348 void AbstractGroupItem::mousePressEvent(QGraphicsSceneMouseEvent * event)
 349 {
 350     if (event->modifiers() & Qt::ShiftModifier) {
 351         // User want to do a rectangle selection, so ignore the event to pass it to the view
 352         event->ignore();
 353     } else QGraphicsItem::mousePressEvent(event);
 354 }