git.sesse.net Git - kdenlive/blob - src/monitorscene.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
  21 #include "monitorscene.h"
  22 #include "renderer.h"
  23 #include "kdenlivesettings.h"
  24
  25 #include <QtCore>
  26 #include <QGraphicsView>
  27 #include <QGraphicsPixmapItem>
  28 #include <QGraphicsSceneMouseEvent>
  29
  30 MonitorScene::MonitorScene(Render *renderer, QObject* parent) :
  31         QGraphicsScene(parent),
  32         m_renderer(renderer),
  33         m_view(NULL),
  34         m_selectedItem(NULL),
  35         m_resizeMode(NoResize),
  36         m_clickPoint(0, 0)
  37 {
  38     setBackgroundBrush(QBrush(QColor(KdenliveSettings::window_background().name())));
  39
  40     QPen framepen(Qt::DotLine);
  41     framepen.setColor(Qt::red);
  42
  43     m_frameBorder = new QGraphicsRectItem(QRectF(0, 0, m_renderer->renderWidth(), m_renderer->renderHeight()));
  44     m_frameBorder->setPen(framepen);
  45     m_frameBorder->setZValue(-9);
  46     m_frameBorder->setBrush(Qt::transparent);
  47     m_frameBorder->setFlags(0);
  48     addItem(m_frameBorder);
  49
  50     m_lastUpdate.start();
  51     m_background = new QGraphicsPixmapItem();
  52     m_background->setZValue(-10);
  53     m_background->setFlags(0);
  54     QPixmap bg(m_renderer->renderWidth(), m_renderer->renderHeight());
  55     bg.fill();
  56     m_background->setPixmap(bg);
  57     addItem(m_background);
  58
  59     connect(m_renderer, SIGNAL(rendererPosition(int)), this, SLOT(slotUpdateBackground()));
  60     connect(m_renderer, SIGNAL(frameUpdated(int)), this, SLOT(slotUpdateBackground()));
  61 }
  62
  63 void MonitorScene::setUp()
  64 {
  65     if (views().count() > 0)
  66         m_view = views().at(0);
  67     else
  68         m_view = NULL;
  69     slotUpdateBackground();
  70 }
  71
  72 void MonitorScene::slotUpdateBackground()
  73 {
  74     if (m_view && m_view->isVisible()) {
  75         if (m_lastUpdate.elapsed() > 200) {
  76             m_background->setPixmap(QPixmap::fromImage(m_renderer->extractFrame(m_renderer->seekFramePosition())));
  77             m_view->fitInView(m_frameBorder, Qt::KeepAspectRatio);
  78             m_view->centerOn(m_frameBorder);
  79             m_lastUpdate.start();
  80         }
  81     }
  82 }
  83
  84 resizeModes MonitorScene::getResizeMode(QGraphicsRectItem *item, QPoint pos)
  85 {
  86     if(!m_view)
  87         return NoResize;
  88
  89     QRectF rect = item->rect().normalized();
  90     // Item mapped coordinates
  91     QPolygon pol = item->deviceTransform(m_view->viewportTransform()).map(rect).toPolygon();
  92     QPainterPath top(pol.point(0));
  93     top.lineTo(pol.point(1));
  94     QPainterPath bottom(pol.point(2));
  95     bottom.lineTo(pol.point(3));
  96     QPainterPath left(pol.point(0));
  97     left.lineTo(pol.point(3));
  98     QPainterPath right(pol.point(1));
  99     right.lineTo(pol.point(2));
 100
 101     QPainterPath mouseArea;
 102     mouseArea.addRect(pos.x() - 4, pos.y() - 4, 8, 8);
 103
 104     // Check for collisions between the mouse and the borders
 105     if (mouseArea.contains(pol.point(0)))
 106         return TopLeft;
 107     else if (mouseArea.contains(pol.point(2)))
 108         return BottomRight;
 109     else if (mouseArea.contains(pol.point(1)))
 110         return TopRight;
 111     else if (mouseArea.contains(pol.point(3)))
 112         return BottomLeft;
 113     else if (top.intersects(mouseArea))
 114         return Top;
 115     else if (bottom.intersects(mouseArea))
 116         return Bottom;
 117     else if (right.intersects(mouseArea))
 118         return Right;
 119     else if (left.intersects(mouseArea))
 120         return Left;
 121     else
 122         return NoResize;
 123 }
 124
 125 void MonitorScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
 126 {
 127     m_resizeMode = NoResize;
 128     m_selectedItem = NULL;
 129
 130     m_clickPoint = event->scenePos();
 131     QList<QGraphicsItem *> itemList = items(QRectF(m_clickPoint - QPoint(4, 4), QSizeF(4, 4)).toRect());
 132
 133     for (int i = 0; i < itemList.count(); ++i) {
 134         if (itemList.at(i)->zValue() >= 0 && itemList.at(i)->flags() & QGraphicsItem::ItemIsMovable) {
 135             m_selectedItem = itemList.at(i);
 136             // Rect
 137             if (itemList.at(i)->type() == 3) {
 138                 m_resizeMode = getResizeMode((QGraphicsRectItem*)m_selectedItem, m_view->mapFromScene(m_clickPoint));
 139                 break;
 140             }
 141         }
 142     }
 143
 144     QGraphicsScene::mousePressEvent(event);
 145 }
 146
 147 void MonitorScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 148 {
 149     QPointF mousePos = event->scenePos();
 150
 151     if (m_selectedItem && event->buttons() & Qt::LeftButton) {
 152         // Rect
 153         if (m_selectedItem->type() == 3) {
 154             QGraphicsRectItem *item = static_cast <QGraphicsRectItem *>(m_selectedItem);
 155             QRectF rect = item->rect().normalized();
 156             QPointF pos = item->pos();
 157             QPointF mousePosInRect = item->mapFromScene(mousePos);
 158             switch (m_resizeMode) {
 159             case TopLeft:
 160                 if (mousePos.x() < pos.x() + rect.height() && mousePos.y() < pos.y() + rect.height()) {
 161                     item->setRect(rect.adjusted(0, 0, -mousePosInRect.x(), -mousePosInRect.y()));
 162                     item->setPos(mousePos);
 163                 }
 164                 break;
 165             case Top:
 166                 if (mousePos.y() < pos.y() + rect.height()) {
 167                     rect.setBottom(rect.height() - mousePosInRect.y());
 168                     item->setRect(rect);
 169                     item->setPos(QPointF(pos.x(), mousePos.y()));
 170                 }
 171                 break;
 172             case TopRight:
 173                 if (mousePos.x() > pos.x() && mousePos.y() < pos.y() + rect.height()) {
 174                     rect.setBottomRight(QPointF(mousePosInRect.x(), rect.bottom() - mousePosInRect.y()));
 175                     item->setRect(rect);
 176                     item->setPos(QPointF(pos.x(), mousePos.y()));
 177                 }
 178                 break;
 179             case Left:
 180                 if (mousePos.x() < pos.x() + rect.width()) {
 181                     rect.setRight(rect.width() - mousePosInRect.x());
 182                     item->setRect(rect);
 183                     item->setPos(QPointF(mousePos.x(), pos.y()));
 184                 }
 185                 break;
 186             case Right:
 187                 if (mousePos.x() > pos.x()) {
 188                     rect.setRight(mousePosInRect.x());
 189                     item->setRect(rect);
 190                 }
 191                 break;
 192             case BottomLeft:
 193                 if (mousePos.x() < pos.x() + rect.width() && mousePos.y() > pos.y()) {
 194                     rect.setBottomRight(QPointF(rect.width() - mousePosInRect.x(), mousePosInRect.y()));
 195                     item->setRect(rect);
 196                     item->setPos(QPointF(mousePos.x(), pos.y()));
 197                 }
 198                 break;
 199             case Bottom:
 200                 if (mousePos.y() > pos.y()) {
 201                     rect.setBottom(mousePosInRect.y());
 202                     item->setRect(rect);
 203                 }
 204                 break;
 205             case BottomRight:
 206                 if (mousePos.x() > pos.x() && mousePos.y() > pos.y()) {
 207                     rect.setBottomRight(mousePosInRect);
 208                     item->setRect(rect);
 209                 }
 210                 break;
 211             default:
 212                 QPointF diff = mousePos - m_clickPoint;
 213                 m_clickPoint = mousePos;
 214                 item->moveBy(diff.x(), diff.y());
 215                 break;
 216             }
 217         }
 218     } else {
 219         mousePos -= QPoint(4, 4);
 220         bool itemFound = false;
 221         QList<QGraphicsItem *> itemList = items(QRectF(mousePos, QSizeF(4, 4)).toRect());
 222
 223         foreach (const QGraphicsItem* item, itemList) {
 224             if (item->zValue() >= 0 && item->flags() &QGraphicsItem::ItemIsMovable) {
 225                 // Rect
 226                 if (item->type() == 3) {
 227                     if (m_view == NULL)
 228                         continue;
 229
 230                     itemFound = true;
 231
 232                     switch (getResizeMode((QGraphicsRectItem*)item, m_view->mapFromScene(event->scenePos()))) {
 233                     case TopLeft:
 234                     case BottomRight:
 235                         m_view->setCursor(Qt::SizeFDiagCursor);
 236                         break;
 237                     case TopRight:
 238                     case BottomLeft:
 239                         m_view->setCursor(Qt::SizeBDiagCursor);
 240                         break;
 241                     case Top:
 242                     case Bottom:
 243                         m_view->setCursor(Qt::SizeVerCursor);
 244                         break;
 245                     case Left:
 246                     case Right:
 247                         m_view->setCursor(Qt::SizeHorCursor);
 248                         break;
 249                     default:
 250                         m_view->setCursor(Qt::OpenHandCursor);
 251                     }
 252                     break;
 253                 }
 254             }
 255         }
 256
 257         if (!itemFound && m_view != NULL)
 258             m_view->setCursor(Qt::ArrowCursor);
 259
 260         QGraphicsScene::mouseMoveEvent(event);
 261     }
 262 }
 263
 264 void MonitorScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 265 {
 266     QGraphicsScene::mouseReleaseEvent(event);
 267     emit actionFinished();
 268 }
 269
 270 #include "monitorscene.moc"