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, QGraphicsItem* parent) :
  29         QGraphicsRectItem(rect, parent)
  30 {
  31     setFlags(QGraphicsItem::ItemIsMovable | QGraphicsItem::ItemIsSelectable);
  32
  33     QPen framepen(Qt::SolidLine);
  34     framepen.setColor(Qt::yellow);
  35     setPen(framepen);
  36     setBrush(Qt::transparent);
  37 }
  38
  39 rectActions OnMonitorRectItem::getMode(QPoint pos)
  40 {
  41     pos = mapFromScene(pos).toPoint();
  42     // Item mapped coordinates
  43     QPolygon pol(rect().normalized().toRect());
  44
  45     QPainterPath top(pol.point(0));
  46     top.lineTo(pol.point(1));
  47     QPainterPath bottom(pol.point(2));
  48     bottom.lineTo(pol.point(3));
  49     QPainterPath left(pol.point(0));
  50     left.lineTo(pol.point(3));
  51     QPainterPath right(pol.point(1));
  52     right.lineTo(pol.point(2));
  53
  54     QPainterPath mouseArea;
  55     mouseArea.addRect(pos.x() - 4, pos.y() - 4, 8, 8);
  56
  57     // Check for collisions between the mouse and the borders
  58     if (mouseArea.contains(pol.point(0)))
  59         return ResizeTopLeft;
  60     else if (mouseArea.contains(pol.point(2)))
  61         return ResizeBottomRight;
  62     else if (mouseArea.contains(pol.point(1)))
  63         return ResizeTopRight;
  64     else if (mouseArea.contains(pol.point(3)))
  65         return ResizeBottomLeft;
  66     else if (top.intersects(mouseArea))
  67         return ResizeTop;
  68     else if (bottom.intersects(mouseArea))
  69         return ResizeBottom;
  70     else if (right.intersects(mouseArea))
  71         return ResizeRight;
  72     else if (left.intersects(mouseArea))
  73         return ResizeLeft;
  74     else if (rect().normalized().contains(pos))
  75         return Move;
  76     else
  77         return NoAction;
  78 }
  79
  80 int OnMonitorRectItem::type() const
  81 {
  82     return Type;
  83 }
  84
  85 void OnMonitorRectItem::setEnabled(bool enabled)
  86 {
  87     m_enabled = enabled;
  88 }
  89
  90 void OnMonitorRectItem::slotMousePressed(QGraphicsSceneMouseEvent* event)
  91 {
  92     if (!m_enabled)
  93         return;
  94
  95     m_clickPoint = event->scenePos();
  96     m_mode = getMode(m_clickPoint.toPoint());
  97 }
  98
  99 void OnMonitorRectItem::slotMouseReleased(QGraphicsSceneMouseEvent* event)
 100 {
 101     if (m_modified) {
 102         m_modified = false;
 103         emit actionFinished();
 104     }
 105
 106     event->accept();
 107 }
 108
 109 void OnMonitorRectItem::slotMouseMoved(QGraphicsSceneMouseEvent* event)
 110 {
 111     if (!m_enabled) {
 112         emit setCursor(QCursor(Qt::ArrowCursor));
 113         return;
 114     }
 115
 116     /*if (event->buttons() != Qt::NoButton && (event->screenPos() - m_screenClickPoint).manhattanLength() < QApplication::startDragDistance()) {
 117      *   event->accept();
 118      *   return;
 119     }*/
 120
 121     QPointF mousePos = event->scenePos();
 122
 123     if (event->buttons() & Qt::LeftButton) {
 124         QRectF r = rect().normalized();
 125         QPointF p = pos();
 126         QPointF mousePosInRect = mapFromScene(mousePos);
 127         QPointF diff = mousePos - m_clickPoint;
 128         m_clickPoint = mousePos;
 129         switch (m_mode) {
 130         case ResizeTopLeft:
 131             if (mousePos.x() < p.x() + r.height() && mousePos.y() < p.y() + r.height()) {
 132                 setRect(r.adjusted(0, 0, -mousePosInRect.x(), -mousePosInRect.y()));
 133                 setPos(mousePos);
 134                 m_modified = true;
 135             }
 136             break;
 137         case ResizeTop:
 138             if (mousePos.y() < p.y() + r.height()) {
 139                 r.setBottom(r.height() - mousePosInRect.y());
 140                 setRect(r);
 141                 setPos(QPointF(p.x(), mousePos.y()));
 142                 m_modified = true;
 143             }
 144             break;
 145         case ResizeTopRight:
 146             if (mousePos.x() > p.x() && mousePos.y() < p.y() + r.height()) {
 147                 r.setBottomRight(QPointF(mousePosInRect.x(), r.bottom() - mousePosInRect.y()));
 148                 setRect(r);
 149                 setPos(QPointF(p.x(), mousePos.y()));
 150                 m_modified = true;
 151             }
 152             break;
 153         case ResizeLeft:
 154             if (mousePos.x() < p.x() + r.width()) {
 155                 r.setRight(r.width() - mousePosInRect.x());
 156                 setRect(r);
 157                 setPos(QPointF(mousePos.x(), p.y()));
 158                 m_modified = true;
 159             }
 160             break;
 161         case ResizeRight:
 162             if (mousePos.x() > p.x()) {
 163                 r.setRight(mousePosInRect.x());
 164                 setRect(r);
 165                 m_modified = true;
 166             }
 167             break;
 168         case ResizeBottomLeft:
 169             if (mousePos.x() < p.x() + r.width() && mousePos.y() > p.y()) {
 170                 r.setBottomRight(QPointF(r.width() - mousePosInRect.x(), mousePosInRect.y()));
 171                 setRect(r);
 172                 setPos(QPointF(mousePos.x(), p.y()));
 173                 m_modified = true;
 174             }
 175             break;
 176         case ResizeBottom:
 177             if (mousePos.y() > p.y()) {
 178                 r.setBottom(mousePosInRect.y());
 179                 setRect(r);
 180                 m_modified = true;
 181             }
 182             break;
 183         case ResizeBottomRight:
 184             if (mousePos.x() > p.x() && mousePos.y() > p.y()) {
 185                 r.setBottomRight(mousePosInRect);
 186                 setRect(r);
 187                 m_modified = true;
 188             }
 189             break;
 190         case Move:
 191             moveBy(diff.x(), diff.y());
 192             m_modified = true;
 193             break;
 194         default:
 195             break;
 196         }
 197     } else {
 198         switch (getMode(event->scenePos().toPoint())) {
 199         case ResizeTopLeft:
 200         case ResizeBottomRight:
 201             emit setCursor(QCursor(Qt::SizeFDiagCursor));
 202             break;
 203         case ResizeTopRight:
 204         case ResizeBottomLeft:
 205             emit setCursor(QCursor(Qt::SizeBDiagCursor));
 206             break;
 207         case ResizeTop:
 208         case ResizeBottom:
 209             emit setCursor(QCursor(Qt::SizeVerCursor));
 210             break;
 211         case ResizeLeft:
 212         case ResizeRight:
 213             emit setCursor(QCursor(Qt::SizeHorCursor));
 214             break;
 215         case Move:
 216             emit setCursor(QCursor(Qt::OpenHandCursor));
 217             break;
 218         default:
 219             emit setCursor(QCursor(Qt::ArrowCursor));
 220             break;
 221         }
 222     }
 223     if (m_modified && KdenliveSettings::monitorscene_directupdate()) {
 224         emit actionFinished();
 225         m_modified = false;
 226     }
 227
 228     event->accept();
 229 }
 230
 231 void OnMonitorRectItem::paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget)
 232 {
 233     Q_UNUSED(widget);
 234
 235     painter->setPen(pen());
 236     painter->drawRect(option->rect);
 237
 238     if (m_enabled) {
 239         double handleSize = 6 / painter->matrix().m11();
 240         double halfHandleSize = handleSize / 2;
 241         painter->fillRect(-halfHandleSize, -halfHandleSize, handleSize, handleSize, QColor(Qt::yellow));
 242         painter->fillRect(option->rect.width() - halfHandleSize, -halfHandleSize, handleSize, handleSize, QColor(Qt::yellow));
 243         painter->fillRect(option->rect.width() - halfHandleSize, option->rect.height() - halfHandleSize, handleSize, handleSize, QColor(Qt::yellow));
 244         painter->fillRect(-halfHandleSize, option->rect.height() - halfHandleSize, handleSize, handleSize, QColor(Qt::yellow));
 245     }
 246 }
 247
 248
 249
 250 #include "onmonitorrectitem.moc"