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     prepareGeometryChange();
  80     m_shape = shape;
  81     setPath(p);
  82 }
  83
  84 void OnMonitorPathItem::getMode(QPointF pos)
  85 {
  86     double dist  = 8;
  87     if (getView()) {
  88         dist /= m_view->matrix().m11();
  89     }
  90     // Item mapped coordinates
  91     for (int i = 0; i < m_points.count(); ++i) {
  92         if ((pos - m_points.at(i)).manhattanLength() <= dist) {
  93             m_activePoint = i;
  94             return;
  95         }
  96     }
  97     m_activePoint = -1;
  98 }
  99
 100 void OnMonitorPathItem::mouseMoveEvent(QGraphicsSceneMouseEvent* event)
 101 {
 102     /*if (event->buttons() != Qt::NoButton && (event->screenPos() - m_screenClickPoint).manhattanLength() < QApplication::startDragDistance()) {
 103      *   event->accept();
 104      *   return;
 105     }*/
 106
 107     if (m_activePoint >= 0 && event->buttons() & Qt::LeftButton) {
 108         QPointF mousePos = event->pos();
 109         m_points[m_activePoint] = mousePos;
 110         rebuildShape();
 111         m_modified = true;
 112         update();
 113     }
 114
 115     if (m_modified) {
 116         event->accept();
 117         if (KdenliveSettings::monitorscene_directupdate()) {
 118             emit changed();
 119             m_modified = false;
 120         }
 121     } else {
 122         event->ignore();
 123     }
 124 }
 125
 126 QList <QPointF> OnMonitorPathItem::points() const
 127 {
 128     return m_points;
 129 }
 130
 131 void OnMonitorPathItem::mouseReleaseEvent(QGraphicsSceneMouseEvent* event)
 132 {
 133     if (m_modified) {
 134         m_modified = false;
 135         emit changed();
 136     }
 137     event->accept();
 138 }
 139
 140 QRectF OnMonitorPathItem::boundingRect () const
 141 {
 142     return shape().boundingRect();
 143 }
 144
 145 QPainterPath OnMonitorPathItem::shape () const
 146 {
 147     return m_shape;
 148 }
 149
 150 void OnMonitorPathItem::hoverLeaveEvent(QGraphicsSceneHoverEvent* /*event*/)
 151 {
 152     if (m_activePoint != -1) {
 153         m_activePoint = -1;
 154         update();
 155     }
 156     unsetCursor();
 157 }
 158
 159 void OnMonitorPathItem::hoverEnterEvent(QGraphicsSceneHoverEvent* /*event*/)
 160 {
 161     setCursor(QCursor(Qt::PointingHandCursor));
 162 }
 163
 164 void OnMonitorPathItem::hoverMoveEvent(QGraphicsSceneHoverEvent* event)
 165 {
 166     int currentPoint = m_activePoint;
 167     getMode(event->pos());
 168     if (currentPoint != m_activePoint) update();
 169     setCursor(QCursor(Qt::PointingHandCursor));
 170 }
 171
 172 void OnMonitorPathItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
 173 {
 174     //Q_UNUSED(widget)
 175     QGraphicsPathItem::paint(painter, option, widget);
 176
 177     double w = 6;
 178     double h = 6;
 179     if (getView()) {
 180         w /= m_view->matrix().m11();
 181         h /= m_view->matrix().m22();
 182     }
 183
 184     QRectF handle(0, 0, w, h);
 185     for (int i = 0; i < m_points.count(); ++i) {
 186         handle.moveCenter(m_points.at(i));
 187         painter->fillRect(handle, m_activePoint == i ? Qt::blue : pen().color());
 188     }
 189 }
 190
 191 bool OnMonitorPathItem::getView()
 192 {
 193     if (m_view)
 194         return true;
 195
 196     if (scene() && scene()->views().count()) {
 197         m_view = scene()->views()[0];
 198         return true;
 199     } else {
 200         return false;
 201     }
 202 }
 203
 204 #include "onmonitorpathitem.moc"