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         m_enabled(true)
  38 {
  39     setBackgroundBrush(QBrush(QColor(KdenliveSettings::window_background().name())));
  40
  41     QPen framepen(Qt::SolidLine);
  42     framepen.setColor(Qt::red);
  43
  44     m_frameBorder = new QGraphicsRectItem(QRectF(0, 0, m_renderer->renderWidth(), m_renderer->renderHeight()));
  45     m_frameBorder->setPen(framepen);
  46     m_frameBorder->setZValue(-2);
  47     m_frameBorder->setBrush(Qt::transparent);
  48     m_frameBorder->setFlags(0);
  49     addItem(m_frameBorder);
  50
  51     m_lastUpdate.start();
  52     m_background = new QGraphicsPixmapItem();
  53     m_background->setZValue(-1);
  54     m_background->setFlags(0);
  55     m_background->setShapeMode(QGraphicsPixmapItem::BoundingRectShape);
  56     m_background->setTransformationMode(Qt::FastTransformation);
  57     QPixmap bg(m_renderer->renderWidth(), m_renderer->renderHeight());
  58     bg.fill();
  59     m_background->setPixmap(bg);
  60     addItem(m_background);
  61
  62     //connect(m_renderer, SIGNAL(rendererPosition(int)), this, SLOT(slotUpdateBackground()));
  63     connect(m_renderer, SIGNAL(frameUpdated(QImage)), this, SLOT(slotSetBackgroundImage(QImage)));
  64 }
  65
  66 void MonitorScene::setUp()
  67 {
  68     if (views().count() > 0)
  69         m_view = views().at(0);
  70     else
  71         m_view = NULL;
  72
  73     m_view->setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
  74
  75     slotUpdateBackground(true);
  76 }
  77
  78 void MonitorScene::setEnabled(bool enabled)
  79 {
  80     m_enabled = enabled;
  81 }
  82
  83 void MonitorScene::slotUpdateBackground(bool fit)
  84 {
  85     if (m_view && m_view->isVisible()) {
  86         if (m_lastUpdate.elapsed() > 200) {
  87             m_background->setPixmap(QPixmap::fromImage(m_backgroundImage, Qt::ThresholdDither));
  88             if (fit) {
  89                 m_view->fitInView(m_frameBorder, Qt::KeepAspectRatio);
  90                 m_view->centerOn(m_frameBorder);
  91             }
  92             m_lastUpdate.start();
  93         }
  94     }
  95 }
  96
  97 void MonitorScene::slotSetBackgroundImage(QImage image)
  98 {
  99     m_backgroundImage = image;
 100     slotUpdateBackground();
 101 }
 102
 103 resizeModes MonitorScene::getResizeMode(QGraphicsRectItem *item, QPoint pos)
 104 {
 105     if(!m_view)
 106         return NoResize;
 107
 108     QRectF rect = item->rect().normalized();
 109     // Item mapped coordinates
 110     QPolygon pol = item->deviceTransform(m_view->viewportTransform()).map(rect).toPolygon();
 111     QPainterPath top(pol.point(0));
 112     top.lineTo(pol.point(1));
 113     QPainterPath bottom(pol.point(2));
 114     bottom.lineTo(pol.point(3));
 115     QPainterPath left(pol.point(0));
 116     left.lineTo(pol.point(3));
 117     QPainterPath right(pol.point(1));
 118     right.lineTo(pol.point(2));
 119
 120     QPainterPath mouseArea;
 121     mouseArea.addRect(pos.x() - 4, pos.y() - 4, 8, 8);
 122
 123     // Check for collisions between the mouse and the borders
 124     if (mouseArea.contains(pol.point(0)))
 125         return TopLeft;
 126     else if (mouseArea.contains(pol.point(2)))
 127         return BottomRight;
 128     else if (mouseArea.contains(pol.point(1)))
 129         return TopRight;
 130     else if (mouseArea.contains(pol.point(3)))
 131         return BottomLeft;
 132     else if (top.intersects(mouseArea))
 133         return Top;
 134     else if (bottom.intersects(mouseArea))
 135         return Bottom;
 136     else if (right.intersects(mouseArea))
 137         return Right;
 138     else if (left.intersects(mouseArea))
 139         return Left;
 140     else
 141         return NoResize;
 142 }
 143
 144 void MonitorScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
 145 {
 146     if (!m_enabled)
 147         return;
 148
 149     m_resizeMode = NoResize;
 150     m_selectedItem = NULL;
 151
 152     m_clickPoint = event->scenePos();
 153     QList<QGraphicsItem *> itemList = items(QRectF(m_clickPoint - QPoint(4, 4), QSizeF(4, 4)).toRect());
 154
 155     for (int i = 0; i < itemList.count(); ++i) {
 156         if (itemList.at(i)->zValue() >= 0 && itemList.at(i)->flags() & QGraphicsItem::ItemIsMovable) {
 157             m_selectedItem = itemList.at(i);
 158             // Rect
 159             if (itemList.at(i)->type() == 3) {
 160                 m_resizeMode = getResizeMode((QGraphicsRectItem*)m_selectedItem, m_view->mapFromScene(m_clickPoint));
 161                 break;
 162             }
 163         }
 164     }
 165
 166     QGraphicsScene::mousePressEvent(event);
 167 }
 168
 169 void MonitorScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 170 {
 171     if (!m_enabled)
 172         return;
 173
 174     QPointF mousePos = event->scenePos();
 175
 176     if (m_selectedItem && event->buttons() & Qt::LeftButton) {
 177         // Rect
 178         if (m_selectedItem->type() == 3) {
 179             QGraphicsRectItem *item = static_cast <QGraphicsRectItem *>(m_selectedItem);
 180             QRectF rect = item->rect().normalized();
 181             QPointF pos = item->pos();
 182             QPointF mousePosInRect = item->mapFromScene(mousePos);
 183             switch (m_resizeMode) {
 184             case TopLeft:
 185                 if (mousePos.x() < pos.x() + rect.height() && mousePos.y() < pos.y() + rect.height()) {
 186                     item->setRect(rect.adjusted(0, 0, -mousePosInRect.x(), -mousePosInRect.y()));
 187                     item->setPos(mousePos);
 188                 }
 189                 break;
 190             case Top:
 191                 if (mousePos.y() < pos.y() + rect.height()) {
 192                     rect.setBottom(rect.height() - mousePosInRect.y());
 193                     item->setRect(rect);
 194                     item->setPos(QPointF(pos.x(), mousePos.y()));
 195                 }
 196                 break;
 197             case TopRight:
 198                 if (mousePos.x() > pos.x() && mousePos.y() < pos.y() + rect.height()) {
 199                     rect.setBottomRight(QPointF(mousePosInRect.x(), rect.bottom() - mousePosInRect.y()));
 200                     item->setRect(rect);
 201                     item->setPos(QPointF(pos.x(), mousePos.y()));
 202                 }
 203                 break;
 204             case Left:
 205                 if (mousePos.x() < pos.x() + rect.width()) {
 206                     rect.setRight(rect.width() - mousePosInRect.x());
 207                     item->setRect(rect);
 208                     item->setPos(QPointF(mousePos.x(), pos.y()));
 209                 }
 210                 break;
 211             case Right:
 212                 if (mousePos.x() > pos.x()) {
 213                     rect.setRight(mousePosInRect.x());
 214                     item->setRect(rect);
 215                 }
 216                 break;
 217             case BottomLeft:
 218                 if (mousePos.x() < pos.x() + rect.width() && mousePos.y() > pos.y()) {
 219                     rect.setBottomRight(QPointF(rect.width() - mousePosInRect.x(), mousePosInRect.y()));
 220                     item->setRect(rect);
 221                     item->setPos(QPointF(mousePos.x(), pos.y()));
 222                 }
 223                 break;
 224             case Bottom:
 225                 if (mousePos.y() > pos.y()) {
 226                     rect.setBottom(mousePosInRect.y());
 227                     item->setRect(rect);
 228                 }
 229                 break;
 230             case BottomRight:
 231                 if (mousePos.x() > pos.x() && mousePos.y() > pos.y()) {
 232                     rect.setBottomRight(mousePosInRect);
 233                     item->setRect(rect);
 234                 }
 235                 break;
 236             default:
 237                 QPointF diff = mousePos - m_clickPoint;
 238                 m_clickPoint = mousePos;
 239                 item->moveBy(diff.x(), diff.y());
 240                 break;
 241             }
 242         }
 243     } else {
 244         mousePos -= QPoint(4, 4);
 245         bool itemFound = false;
 246         QList<QGraphicsItem *> itemList = items(QRectF(mousePos, QSizeF(4, 4)).toRect());
 247
 248         foreach (const QGraphicsItem* item, itemList) {
 249             if (item->zValue() >= 0 && item->flags() &QGraphicsItem::ItemIsMovable) {
 250                 // Rect
 251                 if (item->type() == 3) {
 252                     if (m_view == NULL)
 253                         continue;
 254
 255                     itemFound = true;
 256
 257                     switch (getResizeMode((QGraphicsRectItem*)item, m_view->mapFromScene(event->scenePos()))) {
 258                     case TopLeft:
 259                     case BottomRight:
 260                         m_view->setCursor(Qt::SizeFDiagCursor);
 261                         break;
 262                     case TopRight:
 263                     case BottomLeft:
 264                         m_view->setCursor(Qt::SizeBDiagCursor);
 265                         break;
 266                     case Top:
 267                     case Bottom:
 268                         m_view->setCursor(Qt::SizeVerCursor);
 269                         break;
 270                     case Left:
 271                     case Right:
 272                         m_view->setCursor(Qt::SizeHorCursor);
 273                         break;
 274                     default:
 275                         m_view->setCursor(Qt::OpenHandCursor);
 276                     }
 277                     break;
 278                 }
 279             }
 280         }
 281
 282         if (!itemFound && m_view != NULL)
 283             m_view->setCursor(Qt::ArrowCursor);
 284
 285         QGraphicsScene::mouseMoveEvent(event);
 286     }
 287 }
 288
 289 void MonitorScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 290 {
 291     if (!m_enabled)
 292         return;
 293
 294     QGraphicsScene::mouseReleaseEvent(event);
 295     emit actionFinished();
 296 }
 297
 298 #include "monitorscene.moc"