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         m_modified(false),
  39         m_directUpdate(false)
  40 {
  41     setBackgroundBrush(QBrush(QColor(KdenliveSettings::window_background().name())));
  42
  43     QPen framepen(Qt::SolidLine);
  44     framepen.setColor(Qt::red);
  45
  46     m_frameBorder = new QGraphicsRectItem(QRectF(0, 0, m_renderer->renderWidth(), m_renderer->renderHeight()));
  47     m_frameBorder->setPen(framepen);
  48     m_frameBorder->setZValue(-2);
  49     m_frameBorder->setBrush(Qt::transparent);
  50     m_frameBorder->setFlags(0);
  51     addItem(m_frameBorder);
  52
  53     m_lastUpdate.start();
  54     m_background = new QGraphicsPixmapItem();
  55     m_background->setZValue(-1);
  56     m_background->setFlags(0);
  57     m_background->setShapeMode(QGraphicsPixmapItem::BoundingRectShape);
  58     m_background->setTransformationMode(Qt::FastTransformation);
  59     QPixmap bg(m_renderer->renderWidth(), m_renderer->renderHeight());
  60     bg.fill();
  61     m_background->setPixmap(bg);
  62     addItem(m_background);
  63
  64     //connect(m_renderer, SIGNAL(rendererPosition(int)), this, SLOT(slotUpdateBackground()));
  65     connect(m_renderer, SIGNAL(frameUpdated(QImage)), this, SLOT(slotSetBackgroundImage(QImage)));
  66 }
  67
  68 void MonitorScene::setUp()
  69 {
  70     if (views().count() > 0)
  71         m_view = views().at(0);
  72     else
  73         m_view = NULL;
  74
  75     m_view->setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
  76
  77     slotUpdateBackground(true);
  78 }
  79
  80 void MonitorScene::resetProfile()
  81 {
  82     const QRectF border(0, 0, m_renderer->renderWidth(), m_renderer->renderHeight());
  83     m_frameBorder->setRect(border);
  84 }
  85
  86 void MonitorScene::setEnabled(bool enabled)
  87 {
  88     m_enabled = enabled;
  89 }
  90
  91 void MonitorScene::slotUpdateBackground(bool fit)
  92 {
  93     if (m_view && m_view->isVisible()) {
  94         if (m_lastUpdate.elapsed() > 200) {
  95             m_background->setPixmap(QPixmap::fromImage(m_backgroundImage, Qt::ThresholdDither));
  96             if (fit) {
  97                 m_view->fitInView(m_frameBorder, Qt::KeepAspectRatio);
  98                 m_view->centerOn(m_frameBorder);
  99             }
 100             m_lastUpdate.start();
 101         }
 102     }
 103 }
 104
 105 void MonitorScene::slotSetDirectUpdate(bool directUpdate)
 106 {
 107     m_directUpdate = directUpdate;
 108 }
 109
 110 bool MonitorScene::getDirectUpdate()
 111 {
 112     return m_directUpdate;
 113 }
 114
 115 void MonitorScene::slotSetBackgroundImage(QImage image)
 116 {
 117     m_backgroundImage = image;
 118     slotUpdateBackground();
 119 }
 120
 121 resizeModes MonitorScene::getResizeMode(QGraphicsRectItem *item, QPoint pos)
 122 {
 123     if (!m_view)
 124         return NoResize;
 125
 126     QRectF rect = item->rect().normalized();
 127     // Item mapped coordinates
 128     QPolygon pol = item->deviceTransform(m_view->viewportTransform()).map(rect).toPolygon();
 129     QPainterPath top(pol.point(0));
 130     top.lineTo(pol.point(1));
 131     QPainterPath bottom(pol.point(2));
 132     bottom.lineTo(pol.point(3));
 133     QPainterPath left(pol.point(0));
 134     left.lineTo(pol.point(3));
 135     QPainterPath right(pol.point(1));
 136     right.lineTo(pol.point(2));
 137
 138     QPainterPath mouseArea;
 139     mouseArea.addRect(pos.x() - 4, pos.y() - 4, 8, 8);
 140
 141     // Check for collisions between the mouse and the borders
 142     if (mouseArea.contains(pol.point(0)))
 143         return TopLeft;
 144     else if (mouseArea.contains(pol.point(2)))
 145         return BottomRight;
 146     else if (mouseArea.contains(pol.point(1)))
 147         return TopRight;
 148     else if (mouseArea.contains(pol.point(3)))
 149         return BottomLeft;
 150     else if (top.intersects(mouseArea))
 151         return Top;
 152     else if (bottom.intersects(mouseArea))
 153         return Bottom;
 154     else if (right.intersects(mouseArea))
 155         return Right;
 156     else if (left.intersects(mouseArea))
 157         return Left;
 158     else
 159         return NoResize;
 160 }
 161
 162 void MonitorScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
 163 {
 164     if (!m_enabled)
 165         return;
 166
 167     m_resizeMode = NoResize;
 168     m_selectedItem = NULL;
 169
 170     m_clickPoint = event->scenePos();
 171     QList<QGraphicsItem *> itemList = items(QRectF(m_clickPoint - QPoint(4, 4), QSizeF(4, 4)).toRect());
 172
 173     for (int i = 0; i < itemList.count(); ++i) {
 174         if (itemList.at(i)->zValue() >= 0 && itemList.at(i)->flags() & QGraphicsItem::ItemIsMovable) {
 175             m_selectedItem = itemList.at(i);
 176             // Rect
 177             if (itemList.at(i)->type() == 3) {
 178                 m_resizeMode = getResizeMode((QGraphicsRectItem*)m_selectedItem, m_view->mapFromScene(m_clickPoint));
 179                 break;
 180             }
 181         }
 182     }
 183
 184     QGraphicsScene::mousePressEvent(event);
 185 }
 186
 187 void MonitorScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 188 {
 189     if (!m_enabled)
 190         return;
 191
 192     QPointF mousePos = event->scenePos();
 193
 194     if (m_selectedItem && event->buttons() & Qt::LeftButton) {
 195         // Rect
 196         if (m_selectedItem->type() == 3) {
 197             QGraphicsRectItem *item = static_cast <QGraphicsRectItem *>(m_selectedItem);
 198             QRectF rect = item->rect().normalized();
 199             QPointF pos = item->pos();
 200             QPointF mousePosInRect = item->mapFromScene(mousePos);
 201             switch (m_resizeMode) {
 202             case TopLeft:
 203                 if (mousePos.x() < pos.x() + rect.height() && mousePos.y() < pos.y() + rect.height()) {
 204                     item->setRect(rect.adjusted(0, 0, -mousePosInRect.x(), -mousePosInRect.y()));
 205                     item->setPos(mousePos);
 206                     m_modified = true;
 207                 }
 208                 break;
 209             case Top:
 210                 if (mousePos.y() < pos.y() + rect.height()) {
 211                     rect.setBottom(rect.height() - mousePosInRect.y());
 212                     item->setRect(rect);
 213                     item->setPos(QPointF(pos.x(), mousePos.y()));
 214                     m_modified = true;
 215                 }
 216                 break;
 217             case TopRight:
 218                 if (mousePos.x() > pos.x() && mousePos.y() < pos.y() + rect.height()) {
 219                     rect.setBottomRight(QPointF(mousePosInRect.x(), rect.bottom() - mousePosInRect.y()));
 220                     item->setRect(rect);
 221                     item->setPos(QPointF(pos.x(), mousePos.y()));
 222                     m_modified = true;
 223                 }
 224                 break;
 225             case Left:
 226                 if (mousePos.x() < pos.x() + rect.width()) {
 227                     rect.setRight(rect.width() - mousePosInRect.x());
 228                     item->setRect(rect);
 229                     item->setPos(QPointF(mousePos.x(), pos.y()));
 230                     m_modified = true;
 231                 }
 232                 break;
 233             case Right:
 234                 if (mousePos.x() > pos.x()) {
 235                     rect.setRight(mousePosInRect.x());
 236                     item->setRect(rect);
 237                     m_modified = true;
 238                 }
 239                 break;
 240             case BottomLeft:
 241                 if (mousePos.x() < pos.x() + rect.width() && mousePos.y() > pos.y()) {
 242                     rect.setBottomRight(QPointF(rect.width() - mousePosInRect.x(), mousePosInRect.y()));
 243                     item->setRect(rect);
 244                     item->setPos(QPointF(mousePos.x(), pos.y()));
 245                     m_modified = true;
 246                 }
 247                 break;
 248             case Bottom:
 249                 if (mousePos.y() > pos.y()) {
 250                     rect.setBottom(mousePosInRect.y());
 251                     item->setRect(rect);
 252                     m_modified = true;
 253                 }
 254                 break;
 255             case BottomRight:
 256                 if (mousePos.x() > pos.x() && mousePos.y() > pos.y()) {
 257                     rect.setBottomRight(mousePosInRect);
 258                     item->setRect(rect);
 259                     m_modified = true;
 260                 }
 261                 break;
 262             default:
 263                 QPointF diff = mousePos - m_clickPoint;
 264                 m_clickPoint = mousePos;
 265                 item->moveBy(diff.x(), diff.y());
 266                 m_modified = true;
 267                 break;
 268             }
 269         }
 270     } else {
 271         mousePos -= QPoint(4, 4);
 272         bool itemFound = false;
 273         QList<QGraphicsItem *> itemList = items(QRectF(mousePos, QSizeF(4, 4)).toRect());
 274
 275         foreach(const QGraphicsItem* item, itemList) {
 276             if (item->zValue() >= 0 && item->flags() &QGraphicsItem::ItemIsMovable) {
 277                 // Rect
 278                 if (item->type() == 3) {
 279                     if (m_view == NULL)
 280                         continue;
 281
 282                     itemFound = true;
 283
 284                     switch (getResizeMode((QGraphicsRectItem*)item, m_view->mapFromScene(event->scenePos()))) {
 285                     case TopLeft:
 286                     case BottomRight:
 287                         m_view->setCursor(Qt::SizeFDiagCursor);
 288                         break;
 289                     case TopRight:
 290                     case BottomLeft:
 291                         m_view->setCursor(Qt::SizeBDiagCursor);
 292                         break;
 293                     case Top:
 294                     case Bottom:
 295                         m_view->setCursor(Qt::SizeVerCursor);
 296                         break;
 297                     case Left:
 298                     case Right:
 299                         m_view->setCursor(Qt::SizeHorCursor);
 300                         break;
 301                     default:
 302                         m_view->setCursor(Qt::OpenHandCursor);
 303                     }
 304                     break;
 305                 }
 306             }
 307         }
 308
 309         if (!itemFound && m_view)
 310             m_view->setCursor(Qt::ArrowCursor);
 311
 312         QGraphicsScene::mouseMoveEvent(event);
 313     }
 314     if (m_modified && m_directUpdate) {
 315         emit actionFinished();
 316         m_modified = false;
 317     }
 318 }
 319
 320 void MonitorScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 321 {
 322     if (!m_enabled)
 323         return;
 324
 325     QGraphicsScene::mouseReleaseEvent(event);
 326     if (m_modified) {
 327         m_modified = false;
 328         emit actionFinished();
 329     }
 330 }
 331
 332 #include "monitorscene.moc"