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

   1 /***************************************************************************
   2  *   Copyright (C) 2011 by Till Theato (root@ttill.de)                     *
   3  *   This file is part of Kdenlive (www.kdenlive.org).                     *
   4  *                                                                         *
   5  *   Kdenlive 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  *   Kdenlive 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 Kdenlive.  If not, see <http://www.gnu.org/licenses/>.     *
  17  ***************************************************************************/
  18
  19 #include "bpointitem.h"
  20 #include "splineitem.h"
  21
  22 #include <QPainter>
  23 #include <QGraphicsSceneMouseEvent>
  24 #include <QCursor>
  25
  26
  27 BPointItem::BPointItem(BPoint point, QGraphicsItem* parent) :
  28         QAbstractGraphicsShapeItem(parent),
  29         m_selection(-1)
  30 {
  31     setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
  32
  33     QPen framepen(Qt::SolidLine);
  34     framepen.setColor(Qt::yellow);
  35     setPen(framepen);
  36     setBrush(Qt::NoBrush);
  37     setAcceptHoverEvents(true);
  38
  39     setPos(point.p);
  40     m_point.h1 = mapFromScene(point.h1);
  41     m_point.p = mapFromScene(point.p);
  42     m_point.h2 = mapFromScene(point.h2);
  43     m_point.handlesLinked = false;
  44 }
  45
  46 BPoint BPointItem::getPoint()
  47 {
  48     return BPoint(mapToScene(m_point.h1), mapToScene(m_point.p), mapToScene(m_point.h2));
  49 }
  50
  51 void BPointItem::setPoint(BPoint point)
  52 {
  53     setPos(point.p);
  54     prepareGeometryChange();
  55     m_point.h1 = mapFromScene(point.h1);
  56     m_point.p = mapFromScene(point.p);
  57     m_point.h2 = mapFromScene(point.h2);
  58 }
  59
  60 int BPointItem::type() const
  61 {
  62     return Type;
  63 }
  64
  65 QRectF BPointItem::boundingRect() const
  66 {
  67     QPolygonF p = QPolygonF() << m_point.h1 << m_point.p << m_point.h2;
  68     return p.boundingRect().adjusted(-6, -6, 6, 6);
  69 }
  70
  71 void BPointItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
  72 {
  73     Q_UNUSED(option);
  74     Q_UNUSED(widget);
  75
  76     painter->setPen(QPen(Qt::yellow, 1, Qt::SolidLine));
  77     painter->setBrush(QBrush(isSelected() ? Qt::red : Qt::yellow));
  78     painter->setRenderHint(QPainter::Antialiasing);
  79
  80     double handleSize = 6 / painter->matrix().m11();
  81     double handleSizeHalf = handleSize / 2;
  82
  83     QPolygonF handle = QPolygonF() << QPointF(0, -handleSizeHalf) << QPointF(handleSizeHalf, 0) << QPointF(0, handleSizeHalf) << QPointF(-handleSizeHalf, 0);
  84
  85     painter->drawLine(m_point.h1, m_point.p);
  86     painter->drawLine(m_point.p, m_point.h2);
  87
  88 #if QT_VERSION >= 0x040600
  89     painter->drawConvexPolygon(handle.translated(m_point.h1.x(), m_point.h1.y()));
  90     painter->drawConvexPolygon(handle.translated(m_point.h2.x(), m_point.h2.y()));
  91 #else
  92     tmp = handle;
  93     tmp.translate(m_point.h1.x(), m_point.h1.y());
  94     p.drawConvexPolygon(tmp);
  95     tmp.translate(m_point.h2.x(), m_point.h2.y());
  96     p.drawConvexPolygon(tmp);
  97 #endif
  98
  99     painter->drawEllipse(QRectF(m_point.p.x() - handleSizeHalf,
 100                                 m_point.p.y() - handleSizeHalf, handleSize, handleSize));
 101 }
 102
 103 int BPointItem::getSelection(QPointF pos)
 104 {
 105     QPainterPath mouseArea;
 106     mouseArea.addRect(pos.x() - 6, pos.y() - 6, 12, 12);
 107
 108     if (mouseArea.contains(m_point.h1))
 109         return 0;
 110     else if (mouseArea.contains(m_point.p))
 111         return 1;
 112     else if (mouseArea.contains(m_point.h2))
 113         return 2;
 114
 115     return -1;
 116 }
 117
 118 void BPointItem::mousePressEvent(QGraphicsSceneMouseEvent* event)
 119 {
 120     m_selection = getSelection(event->pos());
 121
 122     if (m_selection < 0) {
 123         event->ignore();
 124         setSelected(false);
 125     } else {
 126         setSelected(true);
 127     }
 128 }
 129
 130 void BPointItem::mouseMoveEvent(QGraphicsSceneMouseEvent* event)
 131 {
 132     prepareGeometryChange();
 133     switch (m_selection) {
 134     case 0:
 135         m_point.setH1(event->pos());
 136         break;
 137     case 1:
 138         m_point.setP(event->pos());
 139         break;
 140     case 2:
 141         m_point.setH2(event->pos());
 142         break;
 143     }
 144
 145     if (parentItem()) {
 146         SplineItem *parent = qgraphicsitem_cast<SplineItem*>(parentItem());
 147         if (parent)
 148             parent->updateSpline();
 149     }
 150 }
 151
 152 void BPointItem::mouseReleaseEvent(QGraphicsSceneMouseEvent* event)
 153 {
 154 QGraphicsItem::mouseReleaseEvent(event);
 155 }
 156
 157 void BPointItem::hoverMoveEvent(QGraphicsSceneHoverEvent* event)
 158 {
 159     if (getSelection(event->pos()) < 0)
 160         unsetCursor();
 161     else
 162         setCursor(QCursor(Qt::PointingHandCursor));
 163 }