git.sesse.net Git - kdenlive/blob - src/onmonitoritems/onmonitorcornersitem.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 "onmonitorcornersitem.h"
  21 #include "kdenlivesettings.h"
  22
  23 #include <QGraphicsSceneMouseEvent>
  24 #include <QPainter>
  25 #include <QStyleOptionGraphicsItem>
  26 #include <QCursor>
  27
  28 OnMonitorCornersItem::OnMonitorCornersItem(MonitorScene* scene, QGraphicsItem* parent) :
  29         AbstractOnMonitorItem(scene),
  30         QGraphicsPolygonItem(parent)
  31 {
  32     setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
  33
  34     QPen framepen(Qt::SolidLine);
  35     framepen.setColor(Qt::yellow);
  36     setPen(framepen);
  37     setBrush(Qt::NoBrush);
  38 }
  39
  40 cornersActions OnMonitorCornersItem::getMode(QPoint pos)
  41 {
  42     QPainterPath mouseArea;
  43     pos = mapFromScene(pos).toPoint();
  44     mouseArea.addRect(pos.x() - 6, pos.y() - 6, 12, 12);
  45     if (mouseArea.contains(polygon().at(0)))
  46         return Corner1;
  47     else if (mouseArea.contains(polygon().at(1)))
  48         return Corner2;
  49     else if (mouseArea.contains(polygon().at(2)))
  50         return Corner3;
  51     else if (mouseArea.contains(polygon().at(3)))
  52         return Corner4;
  53     else
  54         return NoAction;
  55 }
  56
  57 void OnMonitorCornersItem::slotMousePressed(QGraphicsSceneMouseEvent* event)
  58 {
  59     event->accept();
  60
  61     if (!isEnabled())
  62         return;
  63
  64     m_mode = getMode(event->scenePos().toPoint());
  65 }
  66
  67 void OnMonitorCornersItem::slotMouseMoved(QGraphicsSceneMouseEvent* event)
  68 {
  69     event->accept();
  70
  71     if (!isEnabled()) {
  72         emit requestCursor(QCursor(Qt::ArrowCursor));
  73         return;
  74     }
  75
  76     /*if (event->buttons() != Qt::NoButton && (event->screenPos() - m_screenClickPoint).manhattanLength() < QApplication::startDragDistance()) {
  77      *   event->accept();
  78      *   return;
  79     }*/
  80
  81     if (event->buttons() & Qt::LeftButton) {
  82         QPoint mousePos = mapFromScene(event->scenePos()).toPoint();
  83         QPolygon p = polygon().toPolygon();
  84         switch (m_mode) {
  85         case Corner1:
  86             p.replace(0, mousePos);
  87             m_modified = true;
  88             break;
  89         case Corner2:
  90             p.replace(1, mousePos);
  91             m_modified = true;
  92             break;
  93         case Corner3:
  94             p.replace(2, mousePos);
  95             m_modified = true;
  96             break;
  97         case Corner4:
  98             p.replace(3, mousePos);
  99             m_modified = true;
 100             break;
 101         default:
 102             break;
 103         }
 104         setPolygon(p);
 105     } else {
 106         switch (getMode(event->scenePos().toPoint())) {
 107         case NoAction:
 108             emit requestCursor(QCursor(Qt::ArrowCursor));
 109             break;
 110         default:
 111             emit requestCursor(QCursor(Qt::OpenHandCursor));
 112             break;
 113         }
 114     }
 115     if (m_modified && KdenliveSettings::monitorscene_directupdate()) {
 116         emit actionFinished();
 117         m_modified = false;
 118     }
 119 }
 120
 121 void OnMonitorCornersItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
 122 {
 123     if (KdenliveSettings::onmonitoreffects_cornersshowlines())
 124         QGraphicsPolygonItem::paint(painter, option, widget);
 125
 126     painter->setRenderHint(QPainter::Antialiasing);
 127     painter->setBrush(QBrush(Qt::yellow));
 128     double handleSize = 4 / painter->matrix().m11();
 129     painter->drawEllipse(polygon().at(0), handleSize, handleSize);
 130     painter->drawEllipse(polygon().at(1), handleSize, handleSize);
 131     painter->drawEllipse(polygon().at(2), handleSize, handleSize);
 132     painter->drawEllipse(polygon().at(3), handleSize, handleSize);
 133 }
 134
 135 #include "onmonitorcornersitem.moc"