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, MonitorScene *scene, QGraphicsItem* parent) :
  29         AbstractOnMonitorItem(scene),
  30         QGraphicsRectItem(rect, 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::transparent);
  38 }
  39
  40 rectActions OnMonitorRectItem::getMode(QPoint pos)
  41 {
  42     pos = mapFromScene(pos).toPoint();
  43     // Item mapped coordinates
  44     QPolygon pol(rect().normalized().toRect());
  45
  46     QPainterPath top(pol.point(0));
  47     top.lineTo(pol.point(1));
  48     QPainterPath bottom(pol.point(2));
  49     bottom.lineTo(pol.point(3));
  50     QPainterPath left(pol.point(0));
  51     left.lineTo(pol.point(3));
  52     QPainterPath right(pol.point(1));
  53     right.lineTo(pol.point(2));
  54
  55     QPainterPath mouseArea;
  56     mouseArea.addRect(pos.x() - 4, pos.y() - 4, 8, 8);
  57
  58     // Check for collisions between the mouse and the borders
  59     if (mouseArea.contains(pol.point(0)))
  60         return ResizeTopLeft;
  61     else if (mouseArea.contains(pol.point(2)))
  62         return ResizeBottomRight;
  63     else if (mouseArea.contains(pol.point(1)))
  64         return ResizeTopRight;
  65     else if (mouseArea.contains(pol.point(3)))
  66         return ResizeBottomLeft;
  67     else if (top.intersects(mouseArea))
  68         return ResizeTop;
  69     else if (bottom.intersects(mouseArea))
  70         return ResizeBottom;
  71     else if (right.intersects(mouseArea))
  72         return ResizeRight;
  73     else if (left.intersects(mouseArea))
  74         return ResizeLeft;
  75     else if (rect().normalized().contains(pos))
  76         return Move;
  77     else
  78         return NoAction;
  79 }
  80
  81 /*int OnMonitorRectItem::type() const
  82 {
  83     return Type;
  84 }*/
  85
  86 void OnMonitorRectItem::slotMousePressed(QGraphicsSceneMouseEvent* event)
  87 {
  88     event->accept();
  89
  90     if (!isEnabled())
  91         return;
  92
  93     m_clickPoint = event->scenePos();
  94     m_mode = getMode(m_clickPoint.toPoint());
  95 }
  96
  97 void OnMonitorRectItem::slotMouseMoved(QGraphicsSceneMouseEvent* event)
  98 {
  99     event->accept();
 100
 101     if (!isEnabled()) {
 102         emit requestCursor(QCursor(Qt::ArrowCursor));
 103         return;
 104     }
 105
 106     /*if (event->buttons() != Qt::NoButton && (event->screenPos() - m_screenClickPoint).manhattanLength() < QApplication::startDragDistance()) {
 107      *   event->accept();
 108      *   return;
 109     }*/
 110
 111     QPointF mousePos = event->scenePos();
 112
 113     if (event->buttons() & Qt::LeftButton) {
 114         QRectF r = rect().normalized();
 115         QPointF p = pos();
 116         QPointF mousePosInRect = mapFromScene(mousePos);
 117         QPointF diff = mousePos - m_clickPoint;
 118         m_clickPoint = mousePos;
 119         switch (m_mode) {
 120         case ResizeTopLeft:
 121             if (mousePos.x() < p.x() + r.height() && mousePos.y() < p.y() + r.height()) {
 122                 setRect(r.adjusted(0, 0, -mousePosInRect.x(), -mousePosInRect.y()));
 123                 setPos(mousePos);
 124                 m_modified = true;
 125             }
 126             break;
 127         case ResizeTop:
 128             if (mousePos.y() < p.y() + r.height()) {
 129                 r.setBottom(r.height() - mousePosInRect.y());
 130                 setRect(r);
 131                 setPos(QPointF(p.x(), mousePos.y()));
 132                 m_modified = true;
 133             }
 134             break;
 135         case ResizeTopRight:
 136             if (mousePos.x() > p.x() && mousePos.y() < p.y() + r.height()) {
 137                 r.setBottomRight(QPointF(mousePosInRect.x(), r.bottom() - mousePosInRect.y()));
 138                 setRect(r);
 139                 setPos(QPointF(p.x(), mousePos.y()));
 140                 m_modified = true;
 141             }
 142             break;
 143         case ResizeLeft:
 144             if (mousePos.x() < p.x() + r.width()) {
 145                 r.setRight(r.width() - mousePosInRect.x());
 146                 setRect(r);
 147                 setPos(QPointF(mousePos.x(), p.y()));
 148                 m_modified = true;
 149             }
 150             break;
 151         case ResizeRight:
 152             if (mousePos.x() > p.x()) {
 153                 r.setRight(mousePosInRect.x());
 154                 setRect(r);
 155                 m_modified = true;
 156             }
 157             break;
 158         case ResizeBottomLeft:
 159             if (mousePos.x() < p.x() + r.width() && mousePos.y() > p.y()) {
 160                 r.setBottomRight(QPointF(r.width() - mousePosInRect.x(), mousePosInRect.y()));
 161                 setRect(r);
 162                 setPos(QPointF(mousePos.x(), p.y()));
 163                 m_modified = true;
 164             }
 165             break;
 166         case ResizeBottom:
 167             if (mousePos.y() > p.y()) {
 168                 r.setBottom(mousePosInRect.y());
 169                 setRect(r);
 170                 m_modified = true;
 171             }
 172             break;
 173         case ResizeBottomRight:
 174             if (mousePos.x() > p.x() && mousePos.y() > p.y()) {
 175                 r.setBottomRight(mousePosInRect);
 176                 setRect(r);
 177                 m_modified = true;
 178             }
 179             break;
 180         case Move:
 181             moveBy(diff.x(), diff.y());
 182             m_modified = true;
 183             break;
 184         default:
 185             break;
 186         }
 187     } else {
 188         switch (getMode(event->scenePos().toPoint())) {
 189         case ResizeTopLeft:
 190         case ResizeBottomRight:
 191             emit requestCursor(QCursor(Qt::SizeFDiagCursor));
 192             break;
 193         case ResizeTopRight:
 194         case ResizeBottomLeft:
 195             emit requestCursor(QCursor(Qt::SizeBDiagCursor));
 196             break;
 197         case ResizeTop:
 198         case ResizeBottom:
 199             emit requestCursor(QCursor(Qt::SizeVerCursor));
 200             break;
 201         case ResizeLeft:
 202         case ResizeRight:
 203             emit requestCursor(QCursor(Qt::SizeHorCursor));
 204             break;
 205         case Move:
 206             emit requestCursor(QCursor(Qt::OpenHandCursor));
 207             break;
 208         default:
 209             emit requestCursor(QCursor(Qt::ArrowCursor));
 210             break;
 211         }
 212     }
 213     if (m_modified && KdenliveSettings::monitorscene_directupdate()) {
 214         emit actionFinished();
 215         m_modified = false;
 216     }
 217 }
 218
 219 void OnMonitorRectItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
 220 {
 221     Q_UNUSED(widget);
 222
 223     painter->setPen(pen());
 224     painter->drawRect(option->rect);
 225
 226     if (isEnabled()) {
 227         double handleSize = 6 / painter->matrix().m11();
 228         double halfHandleSize = handleSize / 2;
 229         painter->fillRect(-halfHandleSize, -halfHandleSize, handleSize, handleSize, QColor(Qt::yellow));
 230         painter->fillRect(option->rect.width() - halfHandleSize, -halfHandleSize, handleSize, handleSize, QColor(Qt::yellow));
 231         painter->fillRect(option->rect.width() - halfHandleSize, option->rect.height() - halfHandleSize, handleSize, handleSize, QColor(Qt::yellow));
 232         painter->fillRect(-halfHandleSize, option->rect.height() - halfHandleSize, handleSize, handleSize, QColor(Qt::yellow));
 233     }
 234 }
 235
 236 #include "onmonitorrectitem.moc"