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/* This file is part of Step.
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Copyright (C) 2007 Vladimir Kuznetsov <ks.vladimir@gmail.com>
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Step is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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Step is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Step; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#ifndef STEP_WORLDSCENE_H
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#define STEP_WORLDSCENE_H
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#include <QGraphicsScene>
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#include <QGraphicsView>
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#include "messageframe.h"
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class WorldGraphicsItem;
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class WorldGraphicsView;
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/** \brief World scene class */
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class WorldScene: public QGraphicsScene
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typedef QList<const StepCore::MetaObject*> SnapList;
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/** Flags for controlling item snapping behaviour */
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SnapOnCenter = 1, ///< Snap to the center of the body
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SnapSetPosition = 2, ///< Set position property
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SnapSetAngle = 4, ///< Set angle property
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SnapSetLocalPosition = 8, ///< Set localPosition property
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SnapParticle = 256, ///< Allow snapping to Particle
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SnapRigidBody = 512 ///< Allow snapping to RigidBody
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Q_DECLARE_FLAGS(SnapFlags, SnapFlag)
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/** Construct WorldScene */
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explicit WorldScene(WorldModel* worldModel, QObject* parent = 0);
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/** Get StepCore::Item by QGraphicsItem */
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StepCore::Item* itemFromGraphics(const QGraphicsItem* graphicsItem) const;
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/** Get WorldGraphicsItem for given StepCore::Item */
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WorldGraphicsItem* graphicsFromItem(const StepCore::Item* item) const;
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/** Called by WorldView when view scale is updated */
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void updateViewScale(); // Qt4.3 can help here
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/** Get current view scale of the scene */
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double currentViewScale() { return _currentViewScale; }
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/** Calculate united bounding rect of all items
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* (not taking into account WorldSceneAxes */
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QRectF calcItemsBoundingRect();
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/** Highlight item at given position
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* \param flags snap flags
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* \param moreTypes additional item types to snap */
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StepCore::Item* snapHighlight(QPointF pos, SnapFlags flags, const SnapList* moreTypes = 0);
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/** Remove highlighting */
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/** Attach item to another item at given position
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* \param flags snap flags
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* \param moreTypes additional item types to snap
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* \param movingState moving state of the item
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* \param item StepCore::Item to attach
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* \param num Num of the end to attach (or -1)
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* If movingState equals Started or Moving this function
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* will only highlight potential body to attach and leave current
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* body detaches. It movingState equals Finished the function
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* will actually attach the body.
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* This function sets "body" property of the item to snapped item
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* and "position" and/or "localPosition" property to the position
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* on snapped item. If num >=0 then QString::number(num) is added
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* to property names */
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StepCore::Item* snapItem(QPointF pos, SnapFlags flags, const SnapList* moreTypes,
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int movingState, StepCore::Item* item, int num = -1);
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/** Get associated WorldModel */
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WorldModel* worldModel() const { return _worldModel; }
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/** Check if scene has an active item creator */
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bool hasItemCreator() const;
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/** Begin adding new item. Creates appropriate ItemCreator */
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void beginAddItem(const QString& name);
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/** Shows a message to the user
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* \param type message type
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* \param text message text
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* \param flags message flags
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* \return message id of the created message */
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int showMessage(MessageFrame::Type type, const QString& text, MessageFrame::Flags flags = 0) {
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return _messageFrame->showMessage(type, text, flags);
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/** Changed existing message
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* \param id message id
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* \param type message type
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* \param text message text
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* \param flags message flags
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* \return new message id */
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int changeMessage(int id, MessageFrame::Type type, const QString& text, MessageFrame::Flags flags = 0) {
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return _messageFrame->changeMessage(id, type, text, flags);
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* \param id message id */
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void closeMessage(int id) { _messageFrame->closeMessage(id); }
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/** Reload application settings */
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void settingsChanged();
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/** This signal is emitted when item creation is finished or canceled */
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void endAddItem(const QString& name, bool success);
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/** This signal is emitted when a link in the message is activated */
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void linkActivated(const KUrl& url);
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void worldModelReset();
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void worldDataChanged(bool dynamicOnly);
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void worldCurrentChanged(const QModelIndex& current, const QModelIndex& previous);
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void worldSelectionChanged(const QItemSelection& selected, const QItemSelection& deselected);
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void worldRowsInserted(const QModelIndex& parent, int start, int end);
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void worldRowsAboutToBeRemoved(const QModelIndex& parent, int start, int end);
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void messageLinkActivated(const QString& link);
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void snapUpdateToolTip();
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bool event(QEvent* event);
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void mousePressEvent(QGraphicsSceneMouseEvent* mouseEvent);
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void helpEvent(QGraphicsSceneHelpEvent *helpEvent);
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//void contextMenuEvent(QGraphicsSceneContextMenuEvent* contextMenuEvent);
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void worldGetItemsRecursive(const QModelIndex& parent);
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WorldModel* _worldModel;
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WorldGraphicsView* _worldView;
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QHash<const StepCore::Item*, WorldGraphicsItem*> _itemsHash;
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double _currentViewScale;
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ItemCreator* _itemCreator;
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MessageFrame* _messageFrame;
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WorldSceneAxes* _sceneAxes;
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WorldGraphicsItem* _snapItem;
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QString _snapToolTip;
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friend class WorldGraphicsView;
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/** \brief World view */
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class WorldGraphicsView: public QGraphicsView
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WorldGraphicsView(WorldScene* worldScene, QWidget* parent);
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void zoomIn(); ///< Zoom scene in
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void zoomOut(); ///< Zoom scene out
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void fitToPage(); ///< Ensure that all objects are visible
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void actualSize(); ///< Set zoom to 100%
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/** Reload application settings */
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void settingsChanged();
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void sceneRectChanged(const QRectF& rect);
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void mousePressEvent(QMouseEvent* e);
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void mouseReleaseEvent(QMouseEvent* e);
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void wheelEvent(QWheelEvent* e);
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void scrollContentsBy(int dx, int dy);
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void updateSceneRect();
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static const int SCENE_LENGTH = 2000;
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Q_DECLARE_OPERATORS_FOR_FLAGS(WorldScene::SnapFlags)
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step/worldscene.h
