git.sesse.net Git - kdenlive/blob - src/onmonitoritems/onmonitorpathitem.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2010 by Till Theato (root@ttill.de)                     *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA          *
  18  ***************************************************************************/
  19
  20 #include "onmonitorpathitem.h"
  21 #include "kdenlivesettings.h"
  22
  23 #include <QGraphicsSceneMouseEvent>
  24 #include <QPainter>
  25 #include <QStyleOptionGraphicsItem>
  26 #include <QCursor>
  27 #include <QGraphicsView>
  28 #include <QApplication>
  29
  30 #include <mlt++/Mlt.h>
  31
  32 OnMonitorPathItem::OnMonitorPathItem(double dar, QGraphicsItem* parent) :
  33         QGraphicsPathItem(parent),
  34         m_dar(dar),
  35         m_modified(false),
  36         m_view(NULL),
  37         m_activePoint(-1)
  38 {
  39     setFlags(QGraphicsItem::ItemIsMovable);
  40
  41     QPen framepen(Qt::SolidLine);
  42     framepen.setColor(Qt::red);
  43     setPen(framepen);
  44     setBrush(Qt::transparent);
  45     setAcceptHoverEvents(true);
  46 }
  47
  48 void OnMonitorPathItem::setPoints(Mlt::Geometry *geometry)
  49 {
  50     m_points.clear();
  51     QRectF r;
  52     int pos = 0;
  53     Mlt::GeometryItem item;
  54     while (!geometry->next_key(&item, pos)) {
  55         r = QRectF(item.x(), item.y(), item.w(), item.h());
  56         m_points << r.center();
  57         pos = item.frame() + 1;
  58     }
  59     rebuildShape();
  60 }
  61
  62 void OnMonitorPathItem::rebuildShape() {
  63     if (m_activePoint > m_points.count()) m_activePoint = -1;
  64     QPainterPath p;
  65     QPainterPath shape;
  66
  67     if (!m_points.isEmpty()) {
  68         QRectF r(0, 0, 20, 20);
  69         r.moveCenter(m_points.at(0));
  70         shape.addRect(r);
  71
  72         p.moveTo(m_points.at(0));
  73         for (int i = 1; i < m_points.count(); i++) {
  74             p.lineTo(m_points.at(i));
  75             r.moveCenter(m_points.at(i));
  76             shape.addRect(r);
  77         }
  78     }
  79     m_shape = shape;
  80     setPath(p);
  81 }
  82
  83 void OnMonitorPathItem::getMode(QPointF pos)
  84 {
  85     double dist  = 8;
  86     if (getView()) {
  87         dist /= m_view->matrix().m11();
  88     }
  89     // Item mapped coordinates
  90     for (int i = 0; i < m_points.count(); i++) {
  91         if ((pos - m_points.at(i)).manhattanLength() <= dist) {
  92             m_activePoint = i;
  93             return;
  94         }
  95     }
  96     m_activePoint = -1;
  97 }
  98
  99 void OnMonitorPathItem::mouseMoveEvent(QGraphicsSceneMouseEvent* event)
 100 {
 101     /*if (event->buttons() != Qt::NoButton && (event->screenPos() - m_screenClickPoint).manhattanLength() < QApplication::startDragDistance()) {
 102      *   event->accept();
 103      *   return;
 104     }*/
 105
 106     if (m_activePoint >= 0 && event->buttons() & Qt::LeftButton) {
 107         QPointF mousePos = event->pos();
 108         m_points[m_activePoint] = mousePos;
 109         rebuildShape();
 110         m_modified = true;
 111         update();
 112     }
 113
 114     if (m_modified) {
 115         event->accept();
 116         if (KdenliveSettings::monitorscene_directupdate()) {
 117             emit changed();
 118             m_modified = false;
 119         }
 120     } else {
 121         event->ignore();
 122     }
 123 }
 124
 125 QList <QPointF> OnMonitorPathItem::points() const
 126 {
 127     return m_points;
 128 }
 129
 130 void OnMonitorPathItem::mouseReleaseEvent(QGraphicsSceneMouseEvent* event)
 131 {
 132     if (m_modified) {
 133         m_modified = false;
 134         emit changed();
 135     }
 136     event->accept();
 137 }
 138
 139 QRectF OnMonitorPathItem::boundingRect () const
 140 {
 141     return shape().boundingRect();
 142 }
 143
 144 QPainterPath OnMonitorPathItem::shape () const
 145 {
 146     return m_shape;
 147 }
 148
 149 void OnMonitorPathItem::hoverLeaveEvent(QGraphicsSceneHoverEvent* /*event*/)
 150 {
 151     if (m_activePoint != -1) {
 152         m_activePoint = -1;
 153         update();
 154     }
 155     unsetCursor();
 156 }
 157
 158 void OnMonitorPathItem::hoverEnterEvent(QGraphicsSceneHoverEvent* /*event*/)
 159 {
 160     setCursor(QCursor(Qt::PointingHandCursor));
 161 }
 162
 163 void OnMonitorPathItem::hoverMoveEvent(QGraphicsSceneHoverEvent* event)
 164 {
 165     int currentPoint = m_activePoint;
 166     getMode(event->pos());
 167     if (currentPoint != m_activePoint) update();
 168     setCursor(QCursor(Qt::PointingHandCursor));
 169 }
 170
 171 void OnMonitorPathItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
 172 {
 173     //Q_UNUSED(widget)
 174     QGraphicsPathItem::paint(painter, option, widget);
 175
 176     double w = 6;
 177     double h = 6;
 178     if (getView()) {
 179         w /= m_view->matrix().m11();
 180         h /= m_view->matrix().m22();
 181     }
 182
 183     QRectF handle(0, 0, w, h);
 184     for (int i = 0; i < m_points.count(); i++) {
 185         handle.moveCenter(m_points.at(i));
 186         painter->fillRect(handle, m_activePoint == i ? Qt::blue : pen().color());
 187     }
 188 }
 189
 190 bool OnMonitorPathItem::getView()
 191 {
 192     if (m_view)
 193         return true;
 194
 195     if (scene() && scene()->views().count()) {
 196         m_view = scene()->views()[0];
 197         return true;
 198     } else {
 199         return false;
 200     }
 201 }
 202
 203 #include "onmonitorpathitem.moc"