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