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 <QGraphicsView>
  26 #include <QGraphicsPixmapItem>
  27 #include <QGraphicsSceneMouseEvent>
  28
  29 MonitorScene::MonitorScene(Render *renderer, QObject* parent) :
  30         QGraphicsScene(parent),
  31         m_renderer(renderer),
  32         m_view(NULL),
  33         m_selectedItem(NULL),
  34         m_resizeMode(NoResize),
  35         m_clickPoint(0, 0),
  36         m_backgroundImage(QImage())
  37 {
  38     setBackgroundBrush(QBrush(QColor(KdenliveSettings::window_background().name())));
  39
  40     QPen framepen(Qt::SolidLine);
  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(-2);
  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(-1);
  53     m_background->setFlags(0);
  54     m_background->setShapeMode(QGraphicsPixmapItem::BoundingRectShape);
  55     m_background->setTransformationMode(Qt::FastTransformation);
  56     QPixmap bg(m_renderer->renderWidth(), m_renderer->renderHeight());
  57     bg.fill();
  58     m_background->setPixmap(bg);
  59     addItem(m_background);
  60
  61     //connect(m_renderer, SIGNAL(rendererPosition(int)), this, SLOT(slotUpdateBackground()));
  62     connect(m_renderer, SIGNAL(frameUpdated(QImage)), this, SLOT(slotSetBackgroundImage(QImage)));
  63 }
  64
  65 void MonitorScene::setUp()
  66 {
  67     if (views().count() > 0)
  68         m_view = views().at(0);
  69     else
  70         m_view = NULL;
  71
  72     m_view->setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
  73
  74     slotUpdateBackground(true);
  75 }
  76
  77 void MonitorScene::slotUpdateBackground(bool fit)
  78 {
  79     if (m_view && m_view->isVisible()) {
  80         if (m_lastUpdate.elapsed() > 200) {
  81             m_background->setPixmap(QPixmap::fromImage(m_backgroundImage, Qt::ThresholdDither));
  82             if (fit) {
  83                 m_view->fitInView(m_frameBorder, Qt::KeepAspectRatio);
  84                 m_view->centerOn(m_frameBorder);
  85             }
  86             m_lastUpdate.start();
  87         }
  88     }
  89 }
  90
  91 void MonitorScene::slotSetBackgroundImage(QImage image)
  92 {
  93     m_backgroundImage = image;
  94     slotUpdateBackground();
  95 }
  96
  97 resizeModes MonitorScene::getResizeMode(QGraphicsRectItem *item, QPoint pos)
  98 {
  99     if(!m_view)
 100         return NoResize;
 101
 102     QRectF rect = item->rect().normalized();
 103     // Item mapped coordinates
 104     QPolygon pol = item->deviceTransform(m_view->viewportTransform()).map(rect).toPolygon();
 105     QPainterPath top(pol.point(0));
 106     top.lineTo(pol.point(1));
 107     QPainterPath bottom(pol.point(2));
 108     bottom.lineTo(pol.point(3));
 109     QPainterPath left(pol.point(0));
 110     left.lineTo(pol.point(3));
 111     QPainterPath right(pol.point(1));
 112     right.lineTo(pol.point(2));
 113
 114     QPainterPath mouseArea;
 115     mouseArea.addRect(pos.x() - 4, pos.y() - 4, 8, 8);
 116
 117     // Check for collisions between the mouse and the borders
 118     if (mouseArea.contains(pol.point(0)))
 119         return TopLeft;
 120     else if (mouseArea.contains(pol.point(2)))
 121         return BottomRight;
 122     else if (mouseArea.contains(pol.point(1)))
 123         return TopRight;
 124     else if (mouseArea.contains(pol.point(3)))
 125         return BottomLeft;
 126     else if (top.intersects(mouseArea))
 127         return Top;
 128     else if (bottom.intersects(mouseArea))
 129         return Bottom;
 130     else if (right.intersects(mouseArea))
 131         return Right;
 132     else if (left.intersects(mouseArea))
 133         return Left;
 134     else
 135         return NoResize;
 136 }
 137
 138 void MonitorScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
 139 {
 140     m_resizeMode = NoResize;
 141     m_selectedItem = NULL;
 142
 143     m_clickPoint = event->scenePos();
 144     QList<QGraphicsItem *> itemList = items(QRectF(m_clickPoint - QPoint(4, 4), QSizeF(4, 4)).toRect());
 145
 146     for (int i = 0; i < itemList.count(); ++i) {
 147         if (itemList.at(i)->zValue() >= 0 && itemList.at(i)->flags() & QGraphicsItem::ItemIsMovable) {
 148             m_selectedItem = itemList.at(i);
 149             // Rect
 150             if (itemList.at(i)->type() == 3) {
 151                 m_resizeMode = getResizeMode((QGraphicsRectItem*)m_selectedItem, m_view->mapFromScene(m_clickPoint));
 152                 break;
 153             }
 154         }
 155     }
 156
 157     QGraphicsScene::mousePressEvent(event);
 158 }
 159
 160 void MonitorScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 161 {
 162     QPointF mousePos = event->scenePos();
 163
 164     if (m_selectedItem && event->buttons() & Qt::LeftButton) {
 165         // Rect
 166         if (m_selectedItem->type() == 3) {
 167             QGraphicsRectItem *item = static_cast <QGraphicsRectItem *>(m_selectedItem);
 168             QRectF rect = item->rect().normalized();
 169             QPointF pos = item->pos();
 170             QPointF mousePosInRect = item->mapFromScene(mousePos);
 171             switch (m_resizeMode) {
 172             case TopLeft:
 173                 if (mousePos.x() < pos.x() + rect.height() && mousePos.y() < pos.y() + rect.height()) {
 174                     item->setRect(rect.adjusted(0, 0, -mousePosInRect.x(), -mousePosInRect.y()));
 175                     item->setPos(mousePos);
 176                 }
 177                 break;
 178             case Top:
 179                 if (mousePos.y() < pos.y() + rect.height()) {
 180                     rect.setBottom(rect.height() - mousePosInRect.y());
 181                     item->setRect(rect);
 182                     item->setPos(QPointF(pos.x(), mousePos.y()));
 183                 }
 184                 break;
 185             case TopRight:
 186                 if (mousePos.x() > pos.x() && mousePos.y() < pos.y() + rect.height()) {
 187                     rect.setBottomRight(QPointF(mousePosInRect.x(), rect.bottom() - mousePosInRect.y()));
 188                     item->setRect(rect);
 189                     item->setPos(QPointF(pos.x(), mousePos.y()));
 190                 }
 191                 break;
 192             case Left:
 193                 if (mousePos.x() < pos.x() + rect.width()) {
 194                     rect.setRight(rect.width() - mousePosInRect.x());
 195                     item->setRect(rect);
 196                     item->setPos(QPointF(mousePos.x(), pos.y()));
 197                 }
 198                 break;
 199             case Right:
 200                 if (mousePos.x() > pos.x()) {
 201                     rect.setRight(mousePosInRect.x());
 202                     item->setRect(rect);
 203                 }
 204                 break;
 205             case BottomLeft:
 206                 if (mousePos.x() < pos.x() + rect.width() && mousePos.y() > pos.y()) {
 207                     rect.setBottomRight(QPointF(rect.width() - mousePosInRect.x(), mousePosInRect.y()));
 208                     item->setRect(rect);
 209                     item->setPos(QPointF(mousePos.x(), pos.y()));
 210                 }
 211                 break;
 212             case Bottom:
 213                 if (mousePos.y() > pos.y()) {
 214                     rect.setBottom(mousePosInRect.y());
 215                     item->setRect(rect);
 216                 }
 217                 break;
 218             case BottomRight:
 219                 if (mousePos.x() > pos.x() && mousePos.y() > pos.y()) {
 220                     rect.setBottomRight(mousePosInRect);
 221                     item->setRect(rect);
 222                 }
 223                 break;
 224             default:
 225                 QPointF diff = mousePos - m_clickPoint;
 226                 m_clickPoint = mousePos;
 227                 item->moveBy(diff.x(), diff.y());
 228                 break;
 229             }
 230         }
 231     } else {
 232         mousePos -= QPoint(4, 4);
 233         bool itemFound = false;
 234         QList<QGraphicsItem *> itemList = items(QRectF(mousePos, QSizeF(4, 4)).toRect());
 235
 236         foreach (const QGraphicsItem* item, itemList) {
 237             if (item->zValue() >= 0 && item->flags() &QGraphicsItem::ItemIsMovable) {
 238                 // Rect
 239                 if (item->type() == 3) {
 240                     if (m_view == NULL)
 241                         continue;
 242
 243                     itemFound = true;
 244
 245                     switch (getResizeMode((QGraphicsRectItem*)item, m_view->mapFromScene(event->scenePos()))) {
 246                     case TopLeft:
 247                     case BottomRight:
 248                         m_view->setCursor(Qt::SizeFDiagCursor);
 249                         break;
 250                     case TopRight:
 251                     case BottomLeft:
 252                         m_view->setCursor(Qt::SizeBDiagCursor);
 253                         break;
 254                     case Top:
 255                     case Bottom:
 256                         m_view->setCursor(Qt::SizeVerCursor);
 257                         break;
 258                     case Left:
 259                     case Right:
 260                         m_view->setCursor(Qt::SizeHorCursor);
 261                         break;
 262                     default:
 263                         m_view->setCursor(Qt::OpenHandCursor);
 264                     }
 265                     break;
 266                 }
 267             }
 268         }
 269
 270         if (!itemFound && m_view != NULL)
 271             m_view->setCursor(Qt::ArrowCursor);
 272
 273         QGraphicsScene::mouseMoveEvent(event);
 274     }
 275 }
 276
 277 void MonitorScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 278 {
 279     QGraphicsScene::mouseReleaseEvent(event);
 280     emit actionFinished();
 281 }
 282
 283 #include "monitorscene.moc"