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 <QtCore>
  26 #include <QGraphicsView>
  27 #include <QGraphicsPixmapItem>
  28 #include <QGraphicsSceneMouseEvent>
  29
  30 MonitorScene::MonitorScene(Render *renderer, QObject* parent) :
  31         QGraphicsScene(parent),
  32         m_renderer(renderer),
  33         m_view(NULL),
  34         m_selectedItem(NULL),
  35         m_resizeMode(NoResize),
  36         m_clickPoint(0, 0),
  37         m_backgroundImage(QImage())
  38 {
  39     setBackgroundBrush(QBrush(QColor(KdenliveSettings::window_background().name())));
  40
  41     QPen framepen(Qt::DotLine);
  42     framepen.setColor(Qt::red);
  43
  44     m_frameBorder = new QGraphicsRectItem(QRectF(0, 0, m_renderer->renderWidth(), m_renderer->renderHeight()));
  45     m_frameBorder->setPen(framepen);
  46     m_frameBorder->setZValue(-9);
  47     m_frameBorder->setBrush(Qt::transparent);
  48     m_frameBorder->setFlags(0);
  49     addItem(m_frameBorder);
  50
  51     m_lastUpdate.start();
  52     m_background = new QGraphicsPixmapItem();
  53     m_background->setZValue(-10);
  54     m_background->setFlags(0);
  55     QPixmap bg(m_renderer->renderWidth(), m_renderer->renderHeight());
  56     bg.fill();
  57     m_background->setPixmap(bg);
  58     addItem(m_background);
  59
  60     //connect(m_renderer, SIGNAL(rendererPosition(int)), this, SLOT(slotUpdateBackground()));
  61     connect(m_renderer, SIGNAL(frameUpdated(QImage)), this, SLOT(slotSetBackgroundImage(QImage)));
  62 }
  63
  64 void MonitorScene::setUp()
  65 {
  66     if (views().count() > 0)
  67         m_view = views().at(0);
  68     else
  69         m_view = NULL;
  70     slotUpdateBackground(true);
  71 }
  72
  73 void MonitorScene::slotUpdateBackground(bool fit)
  74 {
  75     if (m_view && m_view->isVisible()) {
  76         if (m_lastUpdate.elapsed() > 200) {
  77             m_background->setPixmap(QPixmap::fromImage(m_backgroundImage));
  78             if (fit) {
  79                 m_view->fitInView(m_frameBorder, Qt::KeepAspectRatio);
  80                 m_view->centerOn(m_frameBorder);
  81             }
  82             m_lastUpdate.start();
  83         }
  84     }
  85 }
  86
  87 void MonitorScene::slotSetBackgroundImage(QImage image)
  88 {
  89     m_backgroundImage = image;
  90     slotUpdateBackground();
  91 }
  92
  93 resizeModes MonitorScene::getResizeMode(QGraphicsRectItem *item, QPoint pos)
  94 {
  95     if(!m_view)
  96         return NoResize;
  97
  98     QRectF rect = item->rect().normalized();
  99     // Item mapped coordinates
 100     QPolygon pol = item->deviceTransform(m_view->viewportTransform()).map(rect).toPolygon();
 101     QPainterPath top(pol.point(0));
 102     top.lineTo(pol.point(1));
 103     QPainterPath bottom(pol.point(2));
 104     bottom.lineTo(pol.point(3));
 105     QPainterPath left(pol.point(0));
 106     left.lineTo(pol.point(3));
 107     QPainterPath right(pol.point(1));
 108     right.lineTo(pol.point(2));
 109
 110     QPainterPath mouseArea;
 111     mouseArea.addRect(pos.x() - 4, pos.y() - 4, 8, 8);
 112
 113     // Check for collisions between the mouse and the borders
 114     if (mouseArea.contains(pol.point(0)))
 115         return TopLeft;
 116     else if (mouseArea.contains(pol.point(2)))
 117         return BottomRight;
 118     else if (mouseArea.contains(pol.point(1)))
 119         return TopRight;
 120     else if (mouseArea.contains(pol.point(3)))
 121         return BottomLeft;
 122     else if (top.intersects(mouseArea))
 123         return Top;
 124     else if (bottom.intersects(mouseArea))
 125         return Bottom;
 126     else if (right.intersects(mouseArea))
 127         return Right;
 128     else if (left.intersects(mouseArea))
 129         return Left;
 130     else
 131         return NoResize;
 132 }
 133
 134 void MonitorScene::mousePressEvent(QGraphicsSceneMouseEvent *event)
 135 {
 136     m_resizeMode = NoResize;
 137     m_selectedItem = NULL;
 138
 139     m_clickPoint = event->scenePos();
 140     QList<QGraphicsItem *> itemList = items(QRectF(m_clickPoint - QPoint(4, 4), QSizeF(4, 4)).toRect());
 141
 142     for (int i = 0; i < itemList.count(); ++i) {
 143         if (itemList.at(i)->zValue() >= 0 && itemList.at(i)->flags() & QGraphicsItem::ItemIsMovable) {
 144             m_selectedItem = itemList.at(i);
 145             // Rect
 146             if (itemList.at(i)->type() == 3) {
 147                 m_resizeMode = getResizeMode((QGraphicsRectItem*)m_selectedItem, m_view->mapFromScene(m_clickPoint));
 148                 break;
 149             }
 150         }
 151     }
 152
 153     QGraphicsScene::mousePressEvent(event);
 154 }
 155
 156 void MonitorScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 157 {
 158     QPointF mousePos = event->scenePos();
 159
 160     if (m_selectedItem && event->buttons() & Qt::LeftButton) {
 161         // Rect
 162         if (m_selectedItem->type() == 3) {
 163             QGraphicsRectItem *item = static_cast <QGraphicsRectItem *>(m_selectedItem);
 164             QRectF rect = item->rect().normalized();
 165             QPointF pos = item->pos();
 166             QPointF mousePosInRect = item->mapFromScene(mousePos);
 167             switch (m_resizeMode) {
 168             case TopLeft:
 169                 if (mousePos.x() < pos.x() + rect.height() && mousePos.y() < pos.y() + rect.height()) {
 170                     item->setRect(rect.adjusted(0, 0, -mousePosInRect.x(), -mousePosInRect.y()));
 171                     item->setPos(mousePos);
 172                 }
 173                 break;
 174             case Top:
 175                 if (mousePos.y() < pos.y() + rect.height()) {
 176                     rect.setBottom(rect.height() - mousePosInRect.y());
 177                     item->setRect(rect);
 178                     item->setPos(QPointF(pos.x(), mousePos.y()));
 179                 }
 180                 break;
 181             case TopRight:
 182                 if (mousePos.x() > pos.x() && mousePos.y() < pos.y() + rect.height()) {
 183                     rect.setBottomRight(QPointF(mousePosInRect.x(), rect.bottom() - mousePosInRect.y()));
 184                     item->setRect(rect);
 185                     item->setPos(QPointF(pos.x(), mousePos.y()));
 186                 }
 187                 break;
 188             case Left:
 189                 if (mousePos.x() < pos.x() + rect.width()) {
 190                     rect.setRight(rect.width() - mousePosInRect.x());
 191                     item->setRect(rect);
 192                     item->setPos(QPointF(mousePos.x(), pos.y()));
 193                 }
 194                 break;
 195             case Right:
 196                 if (mousePos.x() > pos.x()) {
 197                     rect.setRight(mousePosInRect.x());
 198                     item->setRect(rect);
 199                 }
 200                 break;
 201             case BottomLeft:
 202                 if (mousePos.x() < pos.x() + rect.width() && mousePos.y() > pos.y()) {
 203                     rect.setBottomRight(QPointF(rect.width() - mousePosInRect.x(), mousePosInRect.y()));
 204                     item->setRect(rect);
 205                     item->setPos(QPointF(mousePos.x(), pos.y()));
 206                 }
 207                 break;
 208             case Bottom:
 209                 if (mousePos.y() > pos.y()) {
 210                     rect.setBottom(mousePosInRect.y());
 211                     item->setRect(rect);
 212                 }
 213                 break;
 214             case BottomRight:
 215                 if (mousePos.x() > pos.x() && mousePos.y() > pos.y()) {
 216                     rect.setBottomRight(mousePosInRect);
 217                     item->setRect(rect);
 218                 }
 219                 break;
 220             default:
 221                 QPointF diff = mousePos - m_clickPoint;
 222                 m_clickPoint = mousePos;
 223                 item->moveBy(diff.x(), diff.y());
 224                 break;
 225             }
 226         }
 227     } else {
 228         mousePos -= QPoint(4, 4);
 229         bool itemFound = false;
 230         QList<QGraphicsItem *> itemList = items(QRectF(mousePos, QSizeF(4, 4)).toRect());
 231
 232         foreach (const QGraphicsItem* item, itemList) {
 233             if (item->zValue() >= 0 && item->flags() &QGraphicsItem::ItemIsMovable) {
 234                 // Rect
 235                 if (item->type() == 3) {
 236                     if (m_view == NULL)
 237                         continue;
 238
 239                     itemFound = true;
 240
 241                     switch (getResizeMode((QGraphicsRectItem*)item, m_view->mapFromScene(event->scenePos()))) {
 242                     case TopLeft:
 243                     case BottomRight:
 244                         m_view->setCursor(Qt::SizeFDiagCursor);
 245                         break;
 246                     case TopRight:
 247                     case BottomLeft:
 248                         m_view->setCursor(Qt::SizeBDiagCursor);
 249                         break;
 250                     case Top:
 251                     case Bottom:
 252                         m_view->setCursor(Qt::SizeVerCursor);
 253                         break;
 254                     case Left:
 255                     case Right:
 256                         m_view->setCursor(Qt::SizeHorCursor);
 257                         break;
 258                     default:
 259                         m_view->setCursor(Qt::OpenHandCursor);
 260                     }
 261                     break;
 262                 }
 263             }
 264         }
 265
 266         if (!itemFound && m_view != NULL)
 267             m_view->setCursor(Qt::ArrowCursor);
 268
 269         QGraphicsScene::mouseMoveEvent(event);
 270     }
 271 }
 272
 273 void MonitorScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 274 {
 275     QGraphicsScene::mouseReleaseEvent(event);
 276     emit actionFinished();
 277 }
 278
 279 #include "monitorscene.moc"