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 {
  39     setZValue(1);
  40     setFlags(QGraphicsItem::ItemClipsToShape | 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     QRect clipRect = option->exposedRect.toRect();
 101     clipRect.adjust(0, 0, 1 / scale + 0.5, 1);
 102     p->fillRect(option->exposedRect, QColor(100, 100, 200, 100));
 103     p->setClipRect(clipRect);
 104     QPen pen = p->pen();
 105     pen.setColor(QColor(200, 90, 90));
 106     pen.setStyle(Qt::DashLine);
 107     p->setPen(pen);
 108     p->drawRect(boundingRect());
 109 }
 110
 111 //virtual
 112 QVariant AbstractGroupItem::itemChange(GraphicsItemChange change, const QVariant &value)
 113 {
 114     if (change == ItemPositionChange && scene()) {
 115         // calculate new position.
 116         const int trackHeight = KdenliveSettings::trackheight();
 117         QPointF start = sceneBoundingRect().topLeft();
 118         QPointF newPos = value.toPointF();
 119         //kDebug()<<"REAL:"<<start.x()<<", PROPOSED:"<<(int)(start.x() - pos().x() + newPos.x());
 120         int xpos = projectScene()->getSnapPointForPos((int)(start.x() + newPos.x() - pos().x()), KdenliveSettings::snaptopoints());
 121
 122         xpos = qMax(xpos, 0);
 123         //kDebug()<<"GRP XPOS:"<<xpos<<", START:"<<start.x()<<",NEW:"<<newPos.x()<<"; SCENE:"<<scenePos().x()<<",POS:"<<pos().x();
 124         newPos.setX((int)(pos().x() + xpos - (int) start.x()));
 125
 126         //int startTrack = (start.y() + trackHeight / 2) / trackHeight;
 127
 128         int realTrack = (start.y() + newPos.y() - pos().y()) / trackHeight;
 129         int proposedTrack = newPos.y() / trackHeight;
 130
 131         int correctedTrack = qMin(realTrack, projectScene()->tracksCount() - (int)(boundingRect().height() + 5) / trackHeight);
 132         correctedTrack = qMax(correctedTrack, 0);
 133
 134         proposedTrack += (correctedTrack - realTrack);
 135
 136         // Check if top item is a clip or a transition
 137         int offset = 0;
 138         int topTrack = -1;
 139         QList<QGraphicsItem *> children = childItems();
 140         for (int i = 0; i < children.count(); i++) {
 141             int currentTrack = (int)(children.at(i)->scenePos().y() / trackHeight);
 142             if (children.at(i)->type() == AVWIDGET) {
 143                 if (topTrack == -1 || currentTrack <= topTrack) {
 144                     offset = 0;
 145                     topTrack = currentTrack;
 146                 }
 147             } else if (children.at(i)->type() == TRANSITIONWIDGET) {
 148                 if (topTrack == -1 || currentTrack < topTrack) {
 149                     offset = (int)(trackHeight / 3 * 2 - 1);
 150                     topTrack = currentTrack;
 151                 }
 152             }
 153         }
 154         newPos.setY((int)((proposedTrack) * trackHeight) + offset);
 155         //if (newPos == start) return start;
 156
 157         /*if (newPos.x() < 0) {
 158             // If group goes below 0, adjust position to 0
 159             return QPointF(pos().x() - start.x(), pos().y());
 160         }*/
 161         QPainterPath shape = groupShape(newPos - pos());
 162         QList<QGraphicsItem*> collindingItems = scene()->items(shape, Qt::IntersectsItemShape);
 163         for (int i = 0; i < children.count(); i++) {
 164             collindingItems.removeAll(children.at(i));
 165         }
 166
 167         if (collindingItems.isEmpty()) return newPos;
 168         else {
 169             bool forwardMove = xpos > start.x();
 170             int offset = 0;
 171             for (int i = 0; i < collindingItems.count(); i++) {
 172                 QGraphicsItem *collision = collindingItems.at(i);
 173                 if (collision->type() == AVWIDGET) {
 174                     // Collision
 175                     //kDebug()<<"// COLLISION WIT:"<<collision->sceneBoundingRect();
 176                     if (newPos.y() != pos().y()) {
 177                         // Track change results in collision, restore original position
 178                         return pos();
 179                     }
 180                     AbstractClipItem *item = static_cast <AbstractClipItem *>(collision);
 181                     if (forwardMove) {
 182                         // Moving forward, determine best pos
 183                         QPainterPath clipPath;
 184                         clipPath.addRect(item->sceneBoundingRect());
 185                         QPainterPath res = shape.intersected(clipPath);
 186                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 187                     } else {
 188                         // Moving backward, determine best pos
 189                         QPainterPath clipPath;
 190                         clipPath.addRect(item->sceneBoundingRect());
 191                         QPainterPath res = shape.intersected(clipPath);
 192                         offset = qMax(offset, (int)(res.boundingRect().width() + 0.5));
 193                     }
 194                 }
 195             }
 196             if (offset > 0) {
 197                 if (forwardMove) {
 198                     newPos.setX(newPos.x() - offset);
 199                 } else {
 200                     newPos.setX(newPos.x() + offset);
 201                 }
 202                 // If there is still a collision after our position adjust, restore original pos
 203                 collindingItems = scene()->items(groupShape(newPos - pos()), Qt::IntersectsItemShape);
 204                 for (int i = 0; i < children.count(); i++) {
 205                     collindingItems.removeAll(children.at(i));
 206                 }
 207                 for (int i = 0; i < collindingItems.count(); i++)
 208                     if (collindingItems.at(i)->type() == AVWIDGET) return pos();
 209             }
 210             return newPos;
 211         }
 212     }
 213     return QGraphicsItemGroup::itemChange(change, value);
 214 }
 215
 216 //virtual
 217 void AbstractGroupItem::dropEvent(QGraphicsSceneDragDropEvent * event)
 218 {
 219     QString effects = QString(event->mimeData()->data("kdenlive/effectslist"));
 220     QDomDocument doc;
 221     doc.setContent(effects, true);
 222     QDomElement e = doc.documentElement();
 223     CustomTrackView *view = (CustomTrackView *) scene()->views()[0];
 224     if (view) view->slotAddGroupEffect(e, this);
 225 }
 226
 227 //virtual
 228 void AbstractGroupItem::dragEnterEvent(QGraphicsSceneDragDropEvent *event)
 229 {
 230     event->setAccepted(event->mimeData()->hasFormat("kdenlive/effectslist"));
 231 }
 232
 233 void AbstractGroupItem::dragLeaveEvent(QGraphicsSceneDragDropEvent *event)
 234 {
 235     Q_UNUSED(event);
 236 }