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->frameRenderWidth(), 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->frameRenderWidth(), 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->frameRenderWidth(), 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() > 100) {
  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_renderer->renderWidth() * m_zoom / m_renderer->frameRenderWidth(), m_zoom);
 119         emit zoomChanged(value);
 120     }
 121 }
 122
 123 void MonitorScene::slotZoomFit()
 124 {
 125     if (m_view) {
 126         int xzoom = 100 * m_view->viewport()->height() / m_renderer->renderHeight();
 127         int yzoom = 100 * m_view->viewport()->width() / m_renderer->renderWidth();
 128         slotZoom(qMin(xzoom, yzoom));
 129         m_view->centerOn(m_frameBorder);
 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     int newzoom = (100 * m_zoom + 0.5);
 148     newzoom++;
 149     slotZoom(qMin(300, newzoom));
 150 }
 151
 152
 153 resizeModes MonitorScene::getResizeMode(QGraphicsRectItem *item, QPoint pos)
 154 {
 155     if (!m_view)
 156         return NoResize;
 157
 158     QRectF rect = item->rect().normalized();
 159     // Item mapped coordinates
 160     QPolygon pol = item->deviceTransform(m_view->viewportTransform()).map(rect).toPolygon();
 161     QPainterPath top(pol.point(0));
 162     top.lineTo(pol.point(1));
 163     QPainterPath bottom(pol.point(2));
 164     bottom.lineTo(pol.point(3));
 165     QPainterPath left(pol.point(0));
 166     left.lineTo(pol.point(3));
 167     QPainterPath right(pol.point(1));
 168     right.lineTo(pol.point(2));
 169
 170     QPainterPath mouseArea;
 171     mouseArea.addRect(pos.x() - 4, pos.y() - 4, 8, 8);
 172
 173     // Check for collisions between the mouse and the borders
 174     if (mouseArea.contains(pol.point(0)))
 175         return TopLeft;
 176     else if (mouseArea.contains(pol.point(2)))
 177         return BottomRight;
 178     else if (mouseArea.contains(pol.point(1)))
 179         return TopRight;
 180     else if (mouseArea.contains(pol.point(3)))
 181         return BottomLeft;
 182     else if (top.intersects(mouseArea))
 183         return Top;
 184     else if (bottom.intersects(mouseArea))
 185         return Bottom;
 186     else if (right.intersects(mouseArea))
 187         return Right;
 188     else if (left.intersects(mouseArea))
 189         return Left;
 190     else
 191         return NoResize;
 192 }
 193
 194 void MonitorScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
 195 {
 196     if (!m_enabled)
 197         return;
 198
 199     m_resizeMode = NoResize;
 200     m_selectedItem = NULL;
 201
 202     m_clickPoint = event->scenePos();
 203     QList<QGraphicsItem *> itemList = items(QRectF(m_clickPoint - QPoint(4, 4), QSizeF(4, 4)).toRect());
 204
 205     for (int i = 0; i < itemList.count(); ++i) {
 206         if (itemList.at(i)->zValue() >= 0 && itemList.at(i)->flags() & QGraphicsItem::ItemIsMovable) {
 207             m_selectedItem = itemList.at(i);
 208             // Rect
 209             if (itemList.at(i)->type() == 3) {
 210                 m_resizeMode = getResizeMode((QGraphicsRectItem*)m_selectedItem, m_view->mapFromScene(m_clickPoint));
 211                 break;
 212             }
 213         }
 214     }
 215
 216     QGraphicsScene::mousePressEvent(event);
 217 }
 218
 219 void MonitorScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 220 {
 221     if (!m_enabled) {
 222         if (m_view)
 223             m_view->setCursor(Qt::ArrowCursor);
 224         return;
 225     }
 226
 227     /*if (event->buttons() != Qt::NoButton && (event->screenPos() - m_screenClickPoint).manhattanLength() < QApplication::startDragDistance()) {
 228         event->accept();
 229         return;
 230     }*/
 231
 232     QPointF mousePos = event->scenePos();
 233
 234     if (m_selectedItem && event->buttons() & Qt::LeftButton) {
 235         // Rect
 236         if (m_selectedItem->type() == 3) {
 237             QGraphicsRectItem *item = static_cast <QGraphicsRectItem *>(m_selectedItem);
 238             QRectF rect = item->rect().normalized();
 239             QPointF pos = item->pos();
 240             QPointF mousePosInRect = item->mapFromScene(mousePos);
 241             switch (m_resizeMode) {
 242             case TopLeft:
 243                 if (mousePos.x() < pos.x() + rect.height() && mousePos.y() < pos.y() + rect.height()) {
 244                     item->setRect(rect.adjusted(0, 0, -mousePosInRect.x(), -mousePosInRect.y()));
 245                     item->setPos(mousePos);
 246                     m_modified = true;
 247                 }
 248                 break;
 249             case Top:
 250                 if (mousePos.y() < pos.y() + rect.height()) {
 251                     rect.setBottom(rect.height() - mousePosInRect.y());
 252                     item->setRect(rect);
 253                     item->setPos(QPointF(pos.x(), mousePos.y()));
 254                     m_modified = true;
 255                 }
 256                 break;
 257             case TopRight:
 258                 if (mousePos.x() > pos.x() && mousePos.y() < pos.y() + rect.height()) {
 259                     rect.setBottomRight(QPointF(mousePosInRect.x(), rect.bottom() - mousePosInRect.y()));
 260                     item->setRect(rect);
 261                     item->setPos(QPointF(pos.x(), mousePos.y()));
 262                     m_modified = true;
 263                 }
 264                 break;
 265             case Left:
 266                 if (mousePos.x() < pos.x() + rect.width()) {
 267                     rect.setRight(rect.width() - mousePosInRect.x());
 268                     item->setRect(rect);
 269                     item->setPos(QPointF(mousePos.x(), pos.y()));
 270                     m_modified = true;
 271                 }
 272                 break;
 273             case Right:
 274                 if (mousePos.x() > pos.x()) {
 275                     rect.setRight(mousePosInRect.x());
 276                     item->setRect(rect);
 277                     m_modified = true;
 278                 }
 279                 break;
 280             case BottomLeft:
 281                 if (mousePos.x() < pos.x() + rect.width() && mousePos.y() > pos.y()) {
 282                     rect.setBottomRight(QPointF(rect.width() - mousePosInRect.x(), mousePosInRect.y()));
 283                     item->setRect(rect);
 284                     item->setPos(QPointF(mousePos.x(), pos.y()));
 285                     m_modified = true;
 286                 }
 287                 break;
 288             case Bottom:
 289                 if (mousePos.y() > pos.y()) {
 290                     rect.setBottom(mousePosInRect.y());
 291                     item->setRect(rect);
 292                     m_modified = true;
 293                 }
 294                 break;
 295             case BottomRight:
 296                 if (mousePos.x() > pos.x() && mousePos.y() > pos.y()) {
 297                     rect.setBottomRight(mousePosInRect);
 298                     item->setRect(rect);
 299                     m_modified = true;
 300                 }
 301                 break;
 302             default:
 303                 QPointF diff = mousePos - m_clickPoint;
 304                 m_clickPoint = mousePos;
 305                 item->moveBy(diff.x(), diff.y());
 306                 m_modified = true;
 307                 break;
 308             }
 309         }
 310     } else {
 311         mousePos -= QPoint(4, 4);
 312         bool itemFound = false;
 313         QList<QGraphicsItem *> itemList = items(QRectF(mousePos, QSizeF(4, 4)).toRect());
 314
 315         foreach(const QGraphicsItem* item, itemList) {
 316             if (item->zValue() >= 0 && item->flags() &QGraphicsItem::ItemIsMovable) {
 317                 // Rect
 318                 if (item->type() == 3) {
 319                     if (m_view == NULL)
 320                         continue;
 321
 322                     itemFound = true;
 323
 324                     switch (getResizeMode((QGraphicsRectItem*)item, m_view->mapFromScene(event->scenePos()))) {
 325                     case TopLeft:
 326                     case BottomRight:
 327                         m_view->setCursor(Qt::SizeFDiagCursor);
 328                         break;
 329                     case TopRight:
 330                     case BottomLeft:
 331                         m_view->setCursor(Qt::SizeBDiagCursor);
 332                         break;
 333                     case Top:
 334                     case Bottom:
 335                         m_view->setCursor(Qt::SizeVerCursor);
 336                         break;
 337                     case Left:
 338                     case Right:
 339                         m_view->setCursor(Qt::SizeHorCursor);
 340                         break;
 341                     default:
 342                         m_view->setCursor(Qt::OpenHandCursor);
 343                     }
 344                     break;
 345                 }
 346             }
 347         }
 348
 349         if (!itemFound && m_view)
 350             m_view->setCursor(Qt::ArrowCursor);
 351
 352         QGraphicsScene::mouseMoveEvent(event);
 353     }
 354     if (m_modified && KdenliveSettings::monitorscene_directupdate()) {
 355         emit actionFinished();
 356         m_modified = false;
 357     }
 358 }
 359
 360 void MonitorScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 361 {
 362     Q_UNUSED(event);
 363
 364     if (!m_enabled)
 365         return;
 366
 367     if (m_modified) {
 368         m_modified = false;
 369         emit actionFinished();
 370     }
 371 }
 372
 373 void MonitorScene::mouseDoubleClickEvent(QGraphicsSceneMouseEvent* event)
 374 {
 375     Q_UNUSED(event);
 376
 377     if (!m_enabled)
 378         emit addKeyframe();
 379 }
 380
 381
 382 #include "monitorscene.moc"