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