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_zoom(1.0)
  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
  78 void MonitorScene::resetProfile()
  79 {
  80     const QRectF border(0, 0, m_renderer->renderWidth(), m_renderer->renderHeight());
  81     m_frameBorder->setRect(border);
  82 }
  83
  84 void MonitorScene::setEnabled(bool enabled)
  85 {
  86     m_enabled = enabled;
  87 }
  88
  89 void MonitorScene::slotUpdateBackground()
  90 {
  91     if (m_view && m_view->isVisible()) {
  92         if (m_lastUpdate.elapsed() > 200) {
  93             m_background->setPixmap(QPixmap::fromImage(m_backgroundImage, Qt::ThresholdDither));
  94             m_lastUpdate.start();
  95         }
  96     }
  97 }
  98
  99 void MonitorScene::slotSetDirectUpdate(bool directUpdate)
 100 {
 101     KdenliveSettings::setMonitorscene_directupdate(directUpdate);
 102 }
 103
 104 void MonitorScene::slotSetBackgroundImage(const QImage &image)
 105 {
 106     if (m_view && m_view->isVisible()) {
 107         m_backgroundImage = image;
 108         slotUpdateBackground();
 109     }
 110 }
 111
 112
 113 void MonitorScene::slotZoom(int value)
 114 {
 115     if (m_view) {
 116         m_zoom = value / 100.0;
 117         m_view->resetTransform();
 118         m_view->scale(m_zoom, m_zoom);
 119         emit zoomChanged(value);
 120     }
 121 }
 122
 123 void MonitorScene::slotZoomFit()
 124 {
 125     if (m_view) {
 126         m_view->fitInView(m_frameBorder, Qt::KeepAspectRatio);
 127         m_view->centerOn(m_frameBorder);
 128         m_zoom = m_view->matrix().m11();
 129         emit zoomChanged((int)(m_zoom * 100));
 130     }
 131 }
 132
 133 void MonitorScene::slotZoomOriginal()
 134 {
 135     slotZoom(100);
 136     if (m_view)
 137         m_view->centerOn(m_frameBorder);
 138 }
 139
 140 void MonitorScene::slotZoomOut()
 141 {
 142     slotZoom(qMax(0, (int)(m_zoom * 100 - 1)));
 143 }
 144
 145 void MonitorScene::slotZoomIn()
 146 {
 147     slotZoom(qMin(300, (int)(m_zoom * 100 + 1)));
 148 }
 149
 150
 151 resizeModes MonitorScene::getResizeMode(QGraphicsRectItem *item, QPoint pos)
 152 {
 153     if (!m_view)
 154         return NoResize;
 155
 156     QRectF rect = item->rect().normalized();
 157     // Item mapped coordinates
 158     QPolygon pol = item->deviceTransform(m_view->viewportTransform()).map(rect).toPolygon();
 159     QPainterPath top(pol.point(0));
 160     top.lineTo(pol.point(1));
 161     QPainterPath bottom(pol.point(2));
 162     bottom.lineTo(pol.point(3));
 163     QPainterPath left(pol.point(0));
 164     left.lineTo(pol.point(3));
 165     QPainterPath right(pol.point(1));
 166     right.lineTo(pol.point(2));
 167
 168     QPainterPath mouseArea;
 169     mouseArea.addRect(pos.x() - 4, pos.y() - 4, 8, 8);
 170
 171     // Check for collisions between the mouse and the borders
 172     if (mouseArea.contains(pol.point(0)))
 173         return TopLeft;
 174     else if (mouseArea.contains(pol.point(2)))
 175         return BottomRight;
 176     else if (mouseArea.contains(pol.point(1)))
 177         return TopRight;
 178     else if (mouseArea.contains(pol.point(3)))
 179         return BottomLeft;
 180     else if (top.intersects(mouseArea))
 181         return Top;
 182     else if (bottom.intersects(mouseArea))
 183         return Bottom;
 184     else if (right.intersects(mouseArea))
 185         return Right;
 186     else if (left.intersects(mouseArea))
 187         return Left;
 188     else
 189         return NoResize;
 190 }
 191
 192 void MonitorScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
 193 {
 194     if (!m_enabled)
 195         return;
 196
 197     m_resizeMode = NoResize;
 198     m_selectedItem = NULL;
 199
 200     m_clickPoint = event->scenePos();
 201     QList<QGraphicsItem *> itemList = items(QRectF(m_clickPoint - QPoint(4, 4), QSizeF(4, 4)).toRect());
 202
 203     for (int i = 0; i < itemList.count(); ++i) {
 204         if (itemList.at(i)->zValue() >= 0 && itemList.at(i)->flags() & QGraphicsItem::ItemIsMovable) {
 205             m_selectedItem = itemList.at(i);
 206             // Rect
 207             if (itemList.at(i)->type() == 3) {
 208                 m_resizeMode = getResizeMode((QGraphicsRectItem*)m_selectedItem, m_view->mapFromScene(m_clickPoint));
 209                 break;
 210             }
 211         }
 212     }
 213
 214     QGraphicsScene::mousePressEvent(event);
 215 }
 216
 217 void MonitorScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 218 {
 219     if (!m_enabled)
 220         return;
 221
 222     /*if (event->buttons() != Qt::NoButton && (event->screenPos() - m_screenClickPoint).manhattanLength() < QApplication::startDragDistance()) {
 223         event->accept();
 224         return;
 225     }*/
 226
 227     QPointF mousePos = event->scenePos();
 228
 229     if (m_selectedItem && event->buttons() & Qt::LeftButton) {
 230         // Rect
 231         if (m_selectedItem->type() == 3) {
 232             QGraphicsRectItem *item = static_cast <QGraphicsRectItem *>(m_selectedItem);
 233             QRectF rect = item->rect().normalized();
 234             QPointF pos = item->pos();
 235             QPointF mousePosInRect = item->mapFromScene(mousePos);
 236             switch (m_resizeMode) {
 237             case TopLeft:
 238                 if (mousePos.x() < pos.x() + rect.height() && mousePos.y() < pos.y() + rect.height()) {
 239                     item->setRect(rect.adjusted(0, 0, -mousePosInRect.x(), -mousePosInRect.y()));
 240                     item->setPos(mousePos);
 241                     m_modified = true;
 242                 }
 243                 break;
 244             case Top:
 245                 if (mousePos.y() < pos.y() + rect.height()) {
 246                     rect.setBottom(rect.height() - mousePosInRect.y());
 247                     item->setRect(rect);
 248                     item->setPos(QPointF(pos.x(), mousePos.y()));
 249                     m_modified = true;
 250                 }
 251                 break;
 252             case TopRight:
 253                 if (mousePos.x() > pos.x() && mousePos.y() < pos.y() + rect.height()) {
 254                     rect.setBottomRight(QPointF(mousePosInRect.x(), rect.bottom() - mousePosInRect.y()));
 255                     item->setRect(rect);
 256                     item->setPos(QPointF(pos.x(), mousePos.y()));
 257                     m_modified = true;
 258                 }
 259                 break;
 260             case Left:
 261                 if (mousePos.x() < pos.x() + rect.width()) {
 262                     rect.setRight(rect.width() - mousePosInRect.x());
 263                     item->setRect(rect);
 264                     item->setPos(QPointF(mousePos.x(), pos.y()));
 265                     m_modified = true;
 266                 }
 267                 break;
 268             case Right:
 269                 if (mousePos.x() > pos.x()) {
 270                     rect.setRight(mousePosInRect.x());
 271                     item->setRect(rect);
 272                     m_modified = true;
 273                 }
 274                 break;
 275             case BottomLeft:
 276                 if (mousePos.x() < pos.x() + rect.width() && mousePos.y() > pos.y()) {
 277                     rect.setBottomRight(QPointF(rect.width() - mousePosInRect.x(), mousePosInRect.y()));
 278                     item->setRect(rect);
 279                     item->setPos(QPointF(mousePos.x(), pos.y()));
 280                     m_modified = true;
 281                 }
 282                 break;
 283             case Bottom:
 284                 if (mousePos.y() > pos.y()) {
 285                     rect.setBottom(mousePosInRect.y());
 286                     item->setRect(rect);
 287                     m_modified = true;
 288                 }
 289                 break;
 290             case BottomRight:
 291                 if (mousePos.x() > pos.x() && mousePos.y() > pos.y()) {
 292                     rect.setBottomRight(mousePosInRect);
 293                     item->setRect(rect);
 294                     m_modified = true;
 295                 }
 296                 break;
 297             default:
 298                 QPointF diff = mousePos - m_clickPoint;
 299                 m_clickPoint = mousePos;
 300                 item->moveBy(diff.x(), diff.y());
 301                 m_modified = true;
 302                 break;
 303             }
 304         }
 305     } else {
 306         mousePos -= QPoint(4, 4);
 307         bool itemFound = false;
 308         QList<QGraphicsItem *> itemList = items(QRectF(mousePos, QSizeF(4, 4)).toRect());
 309
 310         foreach(const QGraphicsItem* item, itemList) {
 311             if (item->zValue() >= 0 && item->flags() &QGraphicsItem::ItemIsMovable) {
 312                 // Rect
 313                 if (item->type() == 3) {
 314                     if (m_view == NULL)
 315                         continue;
 316
 317                     itemFound = true;
 318
 319                     switch (getResizeMode((QGraphicsRectItem*)item, m_view->mapFromScene(event->scenePos()))) {
 320                     case TopLeft:
 321                     case BottomRight:
 322                         m_view->setCursor(Qt::SizeFDiagCursor);
 323                         break;
 324                     case TopRight:
 325                     case BottomLeft:
 326                         m_view->setCursor(Qt::SizeBDiagCursor);
 327                         break;
 328                     case Top:
 329                     case Bottom:
 330                         m_view->setCursor(Qt::SizeVerCursor);
 331                         break;
 332                     case Left:
 333                     case Right:
 334                         m_view->setCursor(Qt::SizeHorCursor);
 335                         break;
 336                     default:
 337                         m_view->setCursor(Qt::OpenHandCursor);
 338                     }
 339                     break;
 340                 }
 341             }
 342         }
 343
 344         if (!itemFound && m_view)
 345             m_view->setCursor(Qt::ArrowCursor);
 346
 347         QGraphicsScene::mouseMoveEvent(event);
 348     }
 349     if (m_modified && KdenliveSettings::monitorscene_directupdate()) {
 350         emit actionFinished();
 351         m_modified = false;
 352     }
 353 }
 354
 355 void MonitorScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 356 {
 357     if (!m_enabled)
 358         return;
 359
 360     QGraphicsScene::mouseReleaseEvent(event);
 361     if (m_modified) {
 362         m_modified = false;
 363         emit actionFinished();
 364     }
 365 }
 366
 367 #include "monitorscene.moc"