git.sesse.net Git - kdenlive/blob - src/onmonitoritems/onmonitorrectitem.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 "onmonitorrectitem.h"
  21 #include "kdenlivesettings.h"
  22
  23 #include <QGraphicsSceneMouseEvent>
  24 #include <QPainter>
  25 #include <QStyleOptionGraphicsItem>
  26 #include <QCursor>
  27
  28 OnMonitorRectItem::OnMonitorRectItem(const QRectF &rect, double dar, QGraphicsItem* parent) :
  29         QGraphicsRectItem(rect, parent),
  30         m_dar(dar),
  31         m_modified(false)
  32 {
  33     setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
  34
  35     QPen framepen(Qt::SolidLine);
  36     framepen.setColor(Qt::yellow);
  37     setPen(framepen);
  38     setBrush(Qt::transparent);
  39     setAcceptHoverEvents(true);
  40 }
  41
  42 rectActions OnMonitorRectItem::getMode(QPointF pos)
  43 {
  44     // Item mapped coordinates
  45     QPolygonF pol(rect().normalized());
  46
  47     QPainterPath top(pol.at(0));
  48     top.lineTo(pol.at(1));
  49     QPainterPath bottom(pol.at(2));
  50     bottom.lineTo(pol.at(3));
  51     QPainterPath left(pol.at(0));
  52     left.lineTo(pol.at(3));
  53     QPainterPath right(pol.at(1));
  54     right.lineTo(pol.at(2));
  55
  56     QPainterPath mouseArea;
  57     mouseArea.addRect(pos.x() - 4, pos.y() - 4, 8, 8);
  58
  59     // Check for collisions between the mouse and the borders
  60     if (mouseArea.contains(pol.at(0)))
  61         return ResizeTopLeft;
  62     else if (mouseArea.contains(pol.at(2)))
  63         return ResizeBottomRight;
  64     else if (mouseArea.contains(pol.at(1)))
  65         return ResizeTopRight;
  66     else if (mouseArea.contains(pol.at(3)))
  67         return ResizeBottomLeft;
  68     else if (top.intersects(mouseArea))
  69         return ResizeTop;
  70     else if (bottom.intersects(mouseArea))
  71         return ResizeBottom;
  72     else if (right.intersects(mouseArea))
  73         return ResizeRight;
  74     else if (left.intersects(mouseArea))
  75         return ResizeLeft;
  76     else if (rect().normalized().contains(pos))
  77         return Move;
  78     else
  79         return NoAction;
  80 }
  81
  82 void OnMonitorRectItem::mousePressEvent(QGraphicsSceneMouseEvent* event)
  83 {
  84     event->accept();
  85
  86     m_lastPoint = event->scenePos();
  87     m_oldRect = rect().normalized();
  88     m_mode = getMode(event->pos());
  89 }
  90
  91 void OnMonitorRectItem::mouseMoveEvent(QGraphicsSceneMouseEvent* event)
  92 {
  93     /*if (event->buttons() != Qt::NoButton && (event->screenPos() - m_screenClickPoint).manhattanLength() < QApplication::startDragDistance()) {
  94      *   event->accept();
  95      *   return;
  96     }*/
  97
  98     if (event->buttons() & Qt::LeftButton) {
  99         QRectF r = rect().normalized();
 100         QPointF p = pos();
 101         QPointF mousePos = event->scenePos();
 102         QPointF mousePosInRect = event->pos();
 103         QPointF diff = mousePos - m_lastPoint;
 104         m_lastPoint = mousePos;
 105
 106         switch (m_mode) {
 107         case ResizeTopLeft:
 108             if (mousePos.x() < p.x() + r.height() && mousePos.y() < p.y() + r.height()) {
 109                 r.adjust(0, 0, -mousePosInRect.x(), -mousePosInRect.y());
 110                 setPos(mousePos);
 111                 m_modified = true;
 112             }
 113             break;
 114         case ResizeTop:
 115             if (mousePos.y() < p.y() + r.height()) {
 116                 r.setBottom(r.height() - mousePosInRect.y());
 117                 setPos(QPointF(p.x(), mousePos.y()));
 118                 m_modified = true;
 119             }
 120             break;
 121         case ResizeTopRight:
 122             if (mousePos.x() > p.x() && mousePos.y() < p.y() + r.height()) {
 123                 r.setBottomRight(QPointF(mousePosInRect.x(), r.bottom() - mousePosInRect.y()));
 124                 setPos(QPointF(p.x(), mousePos.y()));
 125                 m_modified = true;
 126             }
 127             break;
 128         case ResizeLeft:
 129             if (mousePos.x() < p.x() + r.width()) {
 130                 r.setRight(r.width() - mousePosInRect.x());
 131                 setPos(QPointF(mousePos.x(), p.y()));
 132                 m_modified = true;
 133             }
 134             break;
 135         case ResizeRight:
 136             if (mousePos.x() > p.x()) {
 137                 r.setRight(mousePosInRect.x());
 138                 m_modified = true;
 139             }
 140             break;
 141         case ResizeBottomLeft:
 142             if (mousePos.x() < p.x() + r.width() && mousePos.y() > p.y()) {
 143                 r.setBottomRight(QPointF(r.width() - mousePosInRect.x(), mousePosInRect.y()));
 144                 setPos(QPointF(mousePos.x(), p.y()));
 145                 m_modified = true;
 146             }
 147             break;
 148         case ResizeBottom:
 149             if (mousePos.y() > p.y()) {
 150                 r.setBottom(mousePosInRect.y());
 151                 m_modified = true;
 152             }
 153             break;
 154         case ResizeBottomRight:
 155             if (mousePos.x() > p.x() && mousePos.y() > p.y()) {
 156                 r.setBottomRight(mousePosInRect);
 157                 m_modified = true;
 158             }
 159             break;
 160         case Move:
 161             moveBy(diff.x(), diff.y());
 162             m_modified = true;
 163             break;
 164         default:
 165             break;
 166         }
 167
 168         // Keep aspect ratio
 169         if (event->modifiers() == Qt::ControlModifier) {
 170             // compare to rect during mouse press:
 171             // if we subtract rect() we'll get a whole lot of flickering
 172             // because of diffWidth > diffHeight changing all the time
 173             int diffWidth = qAbs(r.width() - m_oldRect.width());
 174             int diffHeight = qAbs(r.height() - m_oldRect.height());
 175
 176             if (diffHeight != 0 || diffWidth != 0) {
 177                 if (diffWidth > diffHeight)
 178                     r.setBottom(r.width() / m_dar);
 179                 else
 180                     r.setRight(r.height() * m_dar);
 181
 182                 // the rect's position changed
 183                 if (p - pos() != QPointF()) {
 184                     if (diffWidth > diffHeight) {
 185                         if (m_mode != ResizeBottomLeft)
 186 #if QT_VERSION >= 0x040600
 187                             setY(p.y() - r.height() + rect().normalized().height());
 188 #else
 189                             setPos(x(), p.y() - r.height() + rect().normalized().height());
 190 #endif
 191                     } else {
 192                         if (m_mode != ResizeTopRight)
 193 #if QT_VERSION >= 0x040600
 194                             setX(p.x() - r.width() + rect().normalized().width());
 195 #else
 196                             setPos(p.x() - r.width() + rect().normalized().width(), y());
 197 #endif
 198                     }
 199                 }
 200             }
 201         }
 202
 203         setRect(r);
 204     }
 205
 206     if (m_modified) {
 207         event->accept();
 208         if (KdenliveSettings::monitorscene_directupdate()) {
 209             emit changed();
 210             m_modified = false;
 211         }
 212     } else {
 213         event->ignore();
 214     }
 215 }
 216
 217 void OnMonitorRectItem::mouseReleaseEvent(QGraphicsSceneMouseEvent* event)
 218 {
 219     if (m_modified) {
 220         m_modified = false;
 221         emit changed();
 222     }
 223     event->accept();
 224 }
 225
 226 void OnMonitorRectItem::hoverMoveEvent(QGraphicsSceneHoverEvent* event)
 227 {
 228     switch (getMode(event->pos())) {
 229     case ResizeTopLeft:
 230     case ResizeBottomRight:
 231         setCursor(QCursor(Qt::SizeFDiagCursor));
 232         break;
 233     case ResizeTopRight:
 234     case ResizeBottomLeft:
 235         setCursor(QCursor(Qt::SizeBDiagCursor));
 236         break;
 237     case ResizeTop:
 238     case ResizeBottom:
 239         setCursor(QCursor(Qt::SizeVerCursor));
 240         break;
 241     case ResizeLeft:
 242     case ResizeRight:
 243         setCursor(QCursor(Qt::SizeHorCursor));
 244         break;
 245     case Move:
 246         setCursor(QCursor(Qt::OpenHandCursor));
 247         break;
 248     default:
 249         unsetCursor();
 250         break;
 251     }
 252 }
 253
 254 void OnMonitorRectItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
 255 {
 256     Q_UNUSED(widget);
 257
 258     painter->setPen(pen());
 259     painter->drawRect(option->rect);
 260
 261     if (isEnabled()) {
 262         double handleSize = 6 / painter->matrix().m11();
 263         double halfHandleSize = handleSize / 2;
 264         painter->fillRect(-halfHandleSize, -halfHandleSize, handleSize, handleSize, QColor(Qt::yellow));
 265         painter->fillRect(option->rect.width() - halfHandleSize, -halfHandleSize, handleSize, handleSize, QColor(Qt::yellow));
 266         painter->fillRect(option->rect.width() - halfHandleSize, option->rect.height() - halfHandleSize, handleSize, handleSize, QColor(Qt::yellow));
 267         painter->fillRect(-halfHandleSize, option->rect.height() - halfHandleSize, handleSize, handleSize, QColor(Qt::yellow));
 268     }
 269 }
 270
 271 #include "onmonitorrectitem.moc"