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