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