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