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 {
  64     if (m_activePoint > m_points.count()) m_activePoint = -1;
  65     QPainterPath p;
  66     QPainterPath shape;
  67
  68     if (!m_points.isEmpty()) {
  69         QRectF r(0, 0, 20, 20);
  70         r.moveCenter(m_points.at(0));
  71         shape.addRect(r);
  72
  73         p.moveTo(m_points.at(0));
  74         for (int i = 1; i < m_points.count(); ++i) {
  75             p.lineTo(m_points.at(i));
  76             r.moveCenter(m_points.at(i));
  77             shape.addRect(r);
  78         }
  79     }
  80     prepareGeometryChange();
  81     m_shape = shape;
  82     setPath(p);
  83 }
  84
  85 void OnMonitorPathItem::getMode(const QPointF &pos)
  86 {
  87     double dist  = 8;
  88     if (getView()) {
  89         dist /= m_view->matrix().m11();
  90     }
  91     // Item mapped coordinates
  92     for (int i = 0; i < m_points.count(); ++i) {
  93         if ((pos - m_points.at(i)).manhattanLength() <= dist) {
  94             m_activePoint = i;
  95             return;
  96         }
  97     }
  98     m_activePoint = -1;
  99 }
 100
 101 void OnMonitorPathItem::mouseMoveEvent(QGraphicsSceneMouseEvent* event)
 102 {
 103     /*if (event->buttons() != Qt::NoButton && (event->screenPos() - m_screenClickPoint).manhattanLength() < QApplication::startDragDistance()) {
 104      *   event->accept();
 105      *   return;
 106     }*/
 107
 108     if (m_activePoint >= 0 && event->buttons() & Qt::LeftButton) {
 109         QPointF mousePos = event->pos();
 110         m_points[m_activePoint] = mousePos;
 111         rebuildShape();
 112         m_modified = true;
 113         update();
 114     }
 115
 116     if (m_modified) {
 117         event->accept();
 118         if (KdenliveSettings::monitorscene_directupdate()) {
 119             emit changed();
 120             m_modified = false;
 121         }
 122     } else {
 123         event->ignore();
 124     }
 125 }
 126
 127 QList <QPointF> OnMonitorPathItem::points() const
 128 {
 129     return m_points;
 130 }
 131
 132 void OnMonitorPathItem::mouseReleaseEvent(QGraphicsSceneMouseEvent* event)
 133 {
 134     if (m_modified) {
 135         m_modified = false;
 136         emit changed();
 137     }
 138     event->accept();
 139 }
 140
 141 QRectF OnMonitorPathItem::boundingRect () const
 142 {
 143     return shape().boundingRect();
 144 }
 145
 146 QPainterPath OnMonitorPathItem::shape () const
 147 {
 148     return m_shape;
 149 }
 150
 151 void OnMonitorPathItem::hoverLeaveEvent(QGraphicsSceneHoverEvent* /*event*/)
 152 {
 153     if (m_activePoint != -1) {
 154         m_activePoint = -1;
 155         update();
 156     }
 157     unsetCursor();
 158 }
 159
 160 void OnMonitorPathItem::hoverEnterEvent(QGraphicsSceneHoverEvent* /*event*/)
 161 {
 162     setCursor(QCursor(Qt::PointingHandCursor));
 163 }
 164
 165 void OnMonitorPathItem::hoverMoveEvent(QGraphicsSceneHoverEvent* event)
 166 {
 167     int currentPoint = m_activePoint;
 168     getMode(event->pos());
 169     if (currentPoint != m_activePoint) update();
 170     setCursor(QCursor(Qt::PointingHandCursor));
 171 }
 172
 173 void OnMonitorPathItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
 174 {
 175     //Q_UNUSED(widget)
 176     QGraphicsPathItem::paint(painter, option, widget);
 177
 178     double w = 6;
 179     double h = 6;
 180     if (getView()) {
 181         w /= m_view->matrix().m11();
 182         h /= m_view->matrix().m22();
 183     }
 184
 185     QRectF handle(0, 0, w, h);
 186     for (int i = 0; i < m_points.count(); ++i) {
 187         handle.moveCenter(m_points.at(i));
 188         painter->fillRect(handle, m_activePoint == i ? Qt::blue : pen().color());
 189     }
 190 }
 191
 192 bool OnMonitorPathItem::getView()
 193 {
 194     if (m_view)
 195         return true;
 196
 197     if (scene() && !scene()->views().isEmpty()) {
 198         m_view = scene()->views().first();
 199         return true;
 200     } else {
 201         return false;
 202     }
 203 }
 204
 205 #include "onmonitorpathitem.moc"