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) :
  36         QObject(),
  37         QGraphicsItemGroup(),
  38         m_fps(fps)
  39 {
  40     setZValue(2);
  41     setFlags(QGraphicsItem::ItemClipsToShape | QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
  42     setAcceptDrops(true);
  43 }
  44
  45 int AbstractGroupItem::type() const
  46 {
  47     return GROUPWIDGET;
  48 }
  49
  50 int AbstractGroupItem::track() const
  51 {
  52     return (int)(scenePos().y() / KdenliveSettings::trackheight());
  53 }
  54
  55 CustomTrackScene* AbstractGroupItem::projectScene()
  56 {
  57     if (scene()) return static_cast <CustomTrackScene*>(scene());
  58     return NULL;
  59 }
  60
  61 QPainterPath AbstractGroupItem::groupShape(QPointF offset)
  62 {
  63     QPainterPath path;
  64     QList<QGraphicsItem *> children = childItems();
  65     for (int i = 0; i < children.count(); i++) {
  66         if (children.at(i)->type() == AVWIDGET) {
  67             QRectF r(children.at(i)->sceneBoundingRect());
  68             r.translate(offset);
  69             path.addRect(r);
  70         }
  71     }
  72     return path;
  73 }
  74
  75 void AbstractGroupItem::addItem(QGraphicsItem * item)
  76 {
  77     addToGroup(item);
  78     //fixItemRect();
  79 }
  80
  81 void AbstractGroupItem::fixItemRect()
  82 {
  83     QPointF start = boundingRect().topLeft();
  84     if (start != QPointF(0, 0)) {
  85         translate(0 - start.x(), 0 - start.y());
  86         setPos(start);
  87     }
  88 }
  89
  90 /*ItemInfo AbstractGroupItem::info() const {
  91     ItemInfo itemInfo;
  92     itemInfo.startPos = m_startPos;
  93     itemInfo.track = m_track;
  94     return itemInfo;
  95 }*/
  96
  97 // virtual
  98 void AbstractGroupItem::paint(QPainter *p, const QStyleOptionGraphicsItem *option, QWidget *)
  99 {
 100     const double scale = option->matrix.m11();
 101     QRect clipRect = option->exposedRect.toRect();
 102     clipRect.adjust(0, 0, 1 / scale + 0.5, 1);
 103     p->fillRect(option->exposedRect, QColor(100, 100, 200, 100));
 104     p->setClipRect(clipRect);
 105     QPen pen = p->pen();
 106     pen.setColor(QColor(200, 90, 90));
 107     pen.setStyle(Qt::DashLine);
 108     p->setPen(pen);
 109     p->drawRect(boundingRect());
 110 }
 111
 112 //virtual
 113 QVariant AbstractGroupItem::itemChange(GraphicsItemChange change, const QVariant &value)
 114 {
 115     if (change == ItemPositionChange && scene()) {
 116         // calculate new position.
 117         const int trackHeight = KdenliveSettings::trackheight();
 118         QPointF start = sceneBoundingRect().topLeft();
 119         QPointF newPos = value.toPointF();
 120         //kDebug()<<"REAL:"<<start.x()<<", PROPOSED:"<<(int)(start.x() - pos().x() + newPos.x());
 121         int xpos = projectScene()->getSnapPointForPos((int)(start.x() + newPos.x() - pos().x()), KdenliveSettings::snaptopoints());
 122
 123         xpos = qMax(xpos, 0);
 124         //kDebug()<<"GRP XPOS:"<<xpos<<", START:"<<start.x()<<",NEW:"<<newPos.x()<<"; SCENE:"<<scenePos().x()<<",POS:"<<pos().x();
 125         newPos.setX((int)(pos().x() + xpos - (int) start.x()));
 126
 127         //int startTrack = (start.y() + trackHeight / 2) / trackHeight;
 128
 129         int realTrack = (start.y() + newPos.y() - pos().y()) / trackHeight;
 130         int proposedTrack = newPos.y() / trackHeight;
 131
 132         int correctedTrack = qMin(realTrack, projectScene()->tracksCount() - (int)(boundingRect().height() + 5) / trackHeight);
 133         correctedTrack = qMax(correctedTrack, 0);
 134
 135         proposedTrack += (correctedTrack - realTrack);
 136
 137         // Check if top item is a clip or a transition
 138         int offset = 0;
 139         int topTrack = -1;
 140         QList<QGraphicsItem *> children = childItems();
 141         for (int i = 0; i < children.count(); i++) {
 142             int currentTrack = (int)(children.at(i)->scenePos().y() / trackHeight);
 143             if (children.at(i)->type() == AVWIDGET) {
 144                 if (topTrack == -1 || currentTrack <= topTrack) {
 145                     offset = 0;
 146                     topTrack = currentTrack;
 147                 }
 148             } else if (children.at(i)->type() == TRANSITIONWIDGET) {
 149                 if (topTrack == -1 || currentTrack < topTrack) {
 150                     offset = (int)(trackHeight / 3 * 2 - 1);
 151                     topTrack = currentTrack;
 152                 }
 153             }
 154         }
 155         newPos.setY((int)((proposedTrack) * trackHeight) + offset);
 156         //if (newPos == start) return start;
 157
 158         /*if (newPos.x() < 0) {
 159             // If group goes below 0, adjust position to 0
 160             return QPointF(pos().x() - start.x(), pos().y());
 161         }*/
 162         QPainterPath shape = groupShape(newPos - pos());
 163         QList<QGraphicsItem*> collindingItems = scene()->items(shape, Qt::IntersectsItemShape);
 164         for (int i = 0; i < children.count(); i++) {
 165             collindingItems.removeAll(children.at(i));
 166         }
 167
 168         if (collindingItems.isEmpty()) return newPos;
 169         else {
 170             bool forwardMove = xpos > start.x();
 171             int offset = 0;
 172             for (int i = 0; i < collindingItems.count(); i++) {
 173                 QGraphicsItem *collision = collindingItems.at(i);
 174                 if (collision->type() == AVWIDGET) {
 175                     // Collision
 176                     //kDebug()<<"// COLLISION WIT:"<<collision->sceneBoundingRect();
 177                     if (newPos.y() != pos().y()) {
 178                         // Track change results in collision, restore original position
 179                         return pos();
 180                     }
 181                     AbstractClipItem *item = static_cast <AbstractClipItem *>(collision);
 182                     if (forwardMove) {
 183                         // Moving forward, determine best pos
 184                         QPainterPath clipPath;
 185                         clipPath.addRect(item->sceneBoundingRect());
 186                         QPainterPath res = shape.intersected(clipPath);
 187                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 188                     } else {
 189                         // Moving backward, determine best pos
 190                         QPainterPath clipPath;
 191                         clipPath.addRect(item->sceneBoundingRect());
 192                         QPainterPath res = shape.intersected(clipPath);
 193                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 194                     }
 195                 }
 196             }
 197             if (offset > 0) {
 198                 if (forwardMove) {
 199                     newPos.setX(newPos.x() - offset);
 200                 } else {
 201                     newPos.setX(newPos.x() + offset);
 202                 }
 203                 // If there is still a collision after our position adjust, restore original pos
 204                 collindingItems = scene()->items(groupShape(newPos - pos()), Qt::IntersectsItemShape);
 205                 for (int i = 0; i < children.count(); i++) {
 206                     collindingItems.removeAll(children.at(i));
 207                 }
 208                 for (int i = 0; i < collindingItems.count(); i++)
 209                     if (collindingItems.at(i)->type() == AVWIDGET) return pos();
 210             }
 211             return newPos;
 212         }
 213     }
 214     return QGraphicsItemGroup::itemChange(change, value);
 215 }
 216
 217 //virtual
 218 void AbstractGroupItem::dropEvent(QGraphicsSceneDragDropEvent * event)
 219 {
 220     QString effects = QString(event->mimeData()->data("kdenlive/effectslist"));
 221     QDomDocument doc;
 222     doc.setContent(effects, true);
 223     QDomElement e = doc.documentElement();
 224     CustomTrackView *view = (CustomTrackView *) scene()->views()[0];
 225     if (view) view->slotAddGroupEffect(e, this);
 226 }
 227
 228 //virtual
 229 void AbstractGroupItem::dragEnterEvent(QGraphicsSceneDragDropEvent *event)
 230 {
 231     event->setAccepted(event->mimeData()->hasFormat("kdenlive/effectslist"));
 232 }
 233
 234 void AbstractGroupItem::dragLeaveEvent(QGraphicsSceneDragDropEvent *event)
 235 {
 236     Q_UNUSED(event);
 237 }