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
  34
  35 AbstractGroupItem::AbstractGroupItem(double fps): QGraphicsItemGroup(), m_fps(fps)
  36 {
  37     setZValue(2);
  38     setFlags(QGraphicsItem::ItemClipsToShape | QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
  39     setAcceptDrops(true);
  40 }
  41
  42 int AbstractGroupItem::type() const
  43 {
  44     return GROUPWIDGET;
  45 }
  46
  47 int AbstractGroupItem::track() const
  48 {
  49     return (int)(scenePos().y() / KdenliveSettings::trackheight());
  50 }
  51
  52 CustomTrackScene* AbstractGroupItem::projectScene()
  53 {
  54     if (scene()) return static_cast <CustomTrackScene*>(scene());
  55     return NULL;
  56 }
  57
  58 QPainterPath AbstractGroupItem::groupShape(QPointF offset)
  59 {
  60     QPainterPath path;
  61     QList<QGraphicsItem *> children = childItems();
  62     for (int i = 0; i < children.count(); i++) {
  63         if (children.at(i)->type() == AVWIDGET) {
  64             QRectF r(children.at(i)->sceneBoundingRect());
  65             r.translate(offset);
  66             path.addRect(r);
  67         }
  68     }
  69     return path;
  70 }
  71
  72 void AbstractGroupItem::addItem(QGraphicsItem * item)
  73 {
  74     addToGroup(item);
  75     //fixItemRect();
  76 }
  77
  78 void AbstractGroupItem::fixItemRect()
  79 {
  80     QPointF start = boundingRect().topLeft();
  81     if (start != QPointF(0, 0)) {
  82         translate(0 - start.x(), 0 - start.y());
  83         setPos(start);
  84     }
  85 }
  86
  87 /*ItemInfo AbstractGroupItem::info() const {
  88     ItemInfo itemInfo;
  89     itemInfo.startPos = m_startPos;
  90     itemInfo.track = m_track;
  91     return itemInfo;
  92 }*/
  93
  94 // virtual
  95 void AbstractGroupItem::paint(QPainter *p, const QStyleOptionGraphicsItem *option, QWidget *)
  96 {
  97     const double scale = option->matrix.m11();
  98     QRect clipRect = option->exposedRect.toRect();
  99     clipRect.adjust(0, 0, 1 / scale + 0.5, 1);
 100     p->fillRect(option->exposedRect, QColor(100, 100, 200, 100));
 101     p->setClipRect(clipRect);
 102     QPen pen = p->pen();
 103     pen.setColor(QColor(200, 90, 90));
 104     pen.setStyle(Qt::DashLine);
 105     p->setPen(pen);
 106     p->drawRect(boundingRect());
 107 }
 108
 109 //virtual
 110 QVariant AbstractGroupItem::itemChange(GraphicsItemChange change, const QVariant &value)
 111 {
 112     if (change == ItemPositionChange && scene()) {
 113         // calculate new position.
 114         const int trackHeight = KdenliveSettings::trackheight();
 115         QPointF start = sceneBoundingRect().topLeft();
 116         QPointF newPos = value.toPointF();
 117         //kDebug()<<"REAL:"<<start.x()<<", PROPOSED:"<<(int)(start.x() - pos().x() + newPos.x());
 118         int xpos = projectScene()->getSnapPointForPos((int)(start.x() + newPos.x() - pos().x()), KdenliveSettings::snaptopoints());
 119
 120         xpos = qMax(xpos, 0);
 121         //kDebug()<<"GRP XPOS:"<<xpos<<", START:"<<start.x()<<",NEW:"<<newPos.x()<<"; SCENE:"<<scenePos().x()<<",POS:"<<pos().x();
 122         newPos.setX((int)(pos().x() + xpos - (int) start.x()));
 123
 124         //int startTrack = (start.y() + trackHeight / 2) / trackHeight;
 125
 126         int realTrack = (start.y() + newPos.y() - pos().y()) / trackHeight;
 127         int proposedTrack = newPos.y() / trackHeight;
 128
 129         int correctedTrack = qMin(realTrack, projectScene()->tracksCount() - (int)(boundingRect().height() + 5) / trackHeight);
 130         correctedTrack = qMax(correctedTrack, 0);
 131
 132         proposedTrack += (correctedTrack - realTrack);
 133
 134         // Check if top item is a clip or a transition
 135         int offset = 0;
 136         int topTrack = -1;
 137         QList<QGraphicsItem *> children = childItems();
 138         for (int i = 0; i < children.count(); i++) {
 139             int currentTrack = (int)(children.at(i)->scenePos().y() / trackHeight);
 140             if (children.at(i)->type() == AVWIDGET) {
 141                 if (topTrack == -1 || currentTrack <= topTrack) {
 142                     offset = 0;
 143                     topTrack = currentTrack;
 144                 }
 145             } else if (children.at(i)->type() == TRANSITIONWIDGET) {
 146                 if (topTrack == -1 || currentTrack < topTrack) {
 147                     offset = (int)(trackHeight / 3 * 2 - 1);
 148                     topTrack = currentTrack;
 149                 }
 150             }
 151         }
 152         newPos.setY((int)((proposedTrack) * trackHeight) + offset);
 153         //if (newPos == start) return start;
 154
 155         /*if (newPos.x() < 0) {
 156             // If group goes below 0, adjust position to 0
 157             return QPointF(pos().x() - start.x(), pos().y());
 158         }*/
 159         QPainterPath shape = groupShape(newPos - pos());
 160         QList<QGraphicsItem*> collindingItems = scene()->items(shape, Qt::IntersectsItemShape);
 161         for (int i = 0; i < children.count(); i++) {
 162             collindingItems.removeAll(children.at(i));
 163         }
 164
 165         if (collindingItems.isEmpty()) return newPos;
 166         else {
 167             bool forwardMove = xpos > start.x();
 168             int offset = 0;
 169             for (int i = 0; i < collindingItems.count(); i++) {
 170                 QGraphicsItem *collision = collindingItems.at(i);
 171                 if (collision->type() == AVWIDGET) {
 172                     // Collision
 173                     //kDebug()<<"// COLLISION WIT:"<<collision->sceneBoundingRect();
 174                     if (newPos.y() != pos().y()) {
 175                         // Track change results in collision, restore original position
 176                         return pos();
 177                     }
 178                     AbstractClipItem *item = static_cast <AbstractClipItem *>(collision);
 179                     if (forwardMove) {
 180                         // Moving forward, determine best pos
 181                         QPainterPath clipPath;
 182                         clipPath.addRect(item->sceneBoundingRect());
 183                         QPainterPath res = shape.intersected(clipPath);
 184                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 185                     } else {
 186                         // Moving backward, determine best pos
 187                         QPainterPath clipPath;
 188                         clipPath.addRect(item->sceneBoundingRect());
 189                         QPainterPath res = shape.intersected(clipPath);
 190                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 191                     }
 192                 }
 193             }
 194             if (offset > 0) {
 195                 if (forwardMove) {
 196                     newPos.setX(newPos.x() - offset);
 197                 } else {
 198                     newPos.setX(newPos.x() + offset);
 199                 }
 200                 // If there is still a collision after our position adjust, restore original pos
 201                 collindingItems = scene()->items(groupShape(newPos - pos()), Qt::IntersectsItemShape);
 202                 for (int i = 0; i < children.count(); i++) {
 203                     collindingItems.removeAll(children.at(i));
 204                 }
 205                 for (int i = 0; i < collindingItems.count(); i++)
 206                     if (collindingItems.at(i)->type() == AVWIDGET) return pos();
 207             }
 208             return newPos;
 209         }
 210     }
 211     return QGraphicsItemGroup::itemChange(change, value);
 212 }
 213
 214 //virtual
 215 void AbstractGroupItem::dropEvent(QGraphicsSceneDragDropEvent * event)
 216 {
 217     QString effects = QString(event->mimeData()->data("kdenlive/effectslist"));
 218     QDomDocument doc;
 219     doc.setContent(effects, true);
 220     QDomElement e = doc.documentElement();
 221     CustomTrackView *view = (CustomTrackView *) scene()->views()[0];
 222     if (view) view->slotAddGroupEffect(e, this);
 223 }
 224
 225 //virtual
 226 void AbstractGroupItem::dragEnterEvent(QGraphicsSceneDragDropEvent *event)
 227 {
 228     event->setAccepted(event->mimeData()->hasFormat("kdenlive/effectslist"));
 229 }
 230
 231 void AbstractGroupItem::dragLeaveEvent(QGraphicsSceneDragDropEvent *event)
 232 {
 233     Q_UNUSED(event);
 234 }