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     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                 slotZoomFit();
  98             m_lastUpdate.start();
  99         }
 100     }
 101 }
 102
 103 void MonitorScene::slotSetDirectUpdate(bool directUpdate)
 104 {
 105     KdenliveSettings::setMonitorscene_directupdate(directUpdate);
 106 }
 107
 108 void MonitorScene::slotSetBackgroundImage(const QImage &image)
 109 {
 110     m_backgroundImage = image;
 111     slotUpdateBackground();
 112 }
 113
 114
 115 void MonitorScene::slotZoom(int value)
 116 {
 117     if (m_view) {
 118         m_zoom = value / 100.0;
 119         m_view->resetTransform();
 120         m_view->scale(m_zoom, m_zoom);
 121         emit zoomChanged(value);
 122     }
 123 }
 124
 125 void MonitorScene::slotZoomFit()
 126 {
 127     if (m_view) {
 128         m_view->fitInView(m_frameBorder, Qt::KeepAspectRatio);
 129         m_view->centerOn(m_frameBorder);
 130         m_zoom = m_view->matrix().m11();
 131         emit zoomChanged((int)(m_zoom * 100));
 132     }
 133 }
 134
 135 void MonitorScene::slotZoomOriginal()
 136 {
 137     slotZoom(100);
 138     if (m_view)
 139         m_view->centerOn(m_frameBorder);
 140 }
 141
 142 void MonitorScene::slotZoomOut()
 143 {
 144     slotZoom(qMax(0, (int)(m_zoom * 100 - 1)));
 145 }
 146
 147 void MonitorScene::slotZoomIn()
 148 {
 149     slotZoom(qMin(300, (int)(m_zoom * 100 + 1)));
 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         return;
 223
 224     QPointF mousePos = event->scenePos();
 225
 226     if (m_selectedItem && event->buttons() & Qt::LeftButton) {
 227         // Rect
 228         if (m_selectedItem->type() == 3) {
 229             QGraphicsRectItem *item = static_cast <QGraphicsRectItem *>(m_selectedItem);
 230             QRectF rect = item->rect().normalized();
 231             QPointF pos = item->pos();
 232             QPointF mousePosInRect = item->mapFromScene(mousePos);
 233             switch (m_resizeMode) {
 234             case TopLeft:
 235                 if (mousePos.x() < pos.x() + rect.height() && mousePos.y() < pos.y() + rect.height()) {
 236                     item->setRect(rect.adjusted(0, 0, -mousePosInRect.x(), -mousePosInRect.y()));
 237                     item->setPos(mousePos);
 238                     m_modified = true;
 239                 }
 240                 break;
 241             case Top:
 242                 if (mousePos.y() < pos.y() + rect.height()) {
 243                     rect.setBottom(rect.height() - mousePosInRect.y());
 244                     item->setRect(rect);
 245                     item->setPos(QPointF(pos.x(), mousePos.y()));
 246                     m_modified = true;
 247                 }
 248                 break;
 249             case TopRight:
 250                 if (mousePos.x() > pos.x() && mousePos.y() < pos.y() + rect.height()) {
 251                     rect.setBottomRight(QPointF(mousePosInRect.x(), rect.bottom() - mousePosInRect.y()));
 252                     item->setRect(rect);
 253                     item->setPos(QPointF(pos.x(), mousePos.y()));
 254                     m_modified = true;
 255                 }
 256                 break;
 257             case Left:
 258                 if (mousePos.x() < pos.x() + rect.width()) {
 259                     rect.setRight(rect.width() - mousePosInRect.x());
 260                     item->setRect(rect);
 261                     item->setPos(QPointF(mousePos.x(), pos.y()));
 262                     m_modified = true;
 263                 }
 264                 break;
 265             case Right:
 266                 if (mousePos.x() > pos.x()) {
 267                     rect.setRight(mousePosInRect.x());
 268                     item->setRect(rect);
 269                     m_modified = true;
 270                 }
 271                 break;
 272             case BottomLeft:
 273                 if (mousePos.x() < pos.x() + rect.width() && mousePos.y() > pos.y()) {
 274                     rect.setBottomRight(QPointF(rect.width() - mousePosInRect.x(), mousePosInRect.y()));
 275                     item->setRect(rect);
 276                     item->setPos(QPointF(mousePos.x(), pos.y()));
 277                     m_modified = true;
 278                 }
 279                 break;
 280             case Bottom:
 281                 if (mousePos.y() > pos.y()) {
 282                     rect.setBottom(mousePosInRect.y());
 283                     item->setRect(rect);
 284                     m_modified = true;
 285                 }
 286                 break;
 287             case BottomRight:
 288                 if (mousePos.x() > pos.x() && mousePos.y() > pos.y()) {
 289                     rect.setBottomRight(mousePosInRect);
 290                     item->setRect(rect);
 291                     m_modified = true;
 292                 }
 293                 break;
 294             default:
 295                 QPointF diff = mousePos - m_clickPoint;
 296                 m_clickPoint = mousePos;
 297                 item->moveBy(diff.x(), diff.y());
 298                 m_modified = true;
 299                 break;
 300             }
 301         }
 302     } else {
 303         mousePos -= QPoint(4, 4);
 304         bool itemFound = false;
 305         QList<QGraphicsItem *> itemList = items(QRectF(mousePos, QSizeF(4, 4)).toRect());
 306
 307         foreach(const QGraphicsItem* item, itemList) {
 308             if (item->zValue() >= 0 && item->flags() &QGraphicsItem::ItemIsMovable) {
 309                 // Rect
 310                 if (item->type() == 3) {
 311                     if (m_view == NULL)
 312                         continue;
 313
 314                     itemFound = true;
 315
 316                     switch (getResizeMode((QGraphicsRectItem*)item, m_view->mapFromScene(event->scenePos()))) {
 317                     case TopLeft:
 318                     case BottomRight:
 319                         m_view->setCursor(Qt::SizeFDiagCursor);
 320                         break;
 321                     case TopRight:
 322                     case BottomLeft:
 323                         m_view->setCursor(Qt::SizeBDiagCursor);
 324                         break;
 325                     case Top:
 326                     case Bottom:
 327                         m_view->setCursor(Qt::SizeVerCursor);
 328                         break;
 329                     case Left:
 330                     case Right:
 331                         m_view->setCursor(Qt::SizeHorCursor);
 332                         break;
 333                     default:
 334                         m_view->setCursor(Qt::OpenHandCursor);
 335                     }
 336                     break;
 337                 }
 338             }
 339         }
 340
 341         if (!itemFound && m_view)
 342             m_view->setCursor(Qt::ArrowCursor);
 343
 344         QGraphicsScene::mouseMoveEvent(event);
 345     }
 346     if (m_modified && KdenliveSettings::monitorscene_directupdate()) {
 347         emit actionFinished();
 348         m_modified = false;
 349     }
 350 }
 351
 352 void MonitorScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 353 {
 354     if (!m_enabled)
 355         return;
 356
 357     QGraphicsScene::mouseReleaseEvent(event);
 358     if (m_modified) {
 359         m_modified = false;
 360         emit actionFinished();
 361     }
 362 }
 363
 364 #include "monitorscene.moc"