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src/wbwidget.h
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src/wbwidget.h
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/*
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* wbwidget.h - a widget for processing and showing whiteboard
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* messages.
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* Copyright (C) 2006 Joonas Govenius
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License
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* along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#ifndef WBWIDGET_H
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#define WBWIDGET_H
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#include "wbscene.h"
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#include <QWidget>
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#include <QGraphicsView>
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#include <QTimer>
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#include <QTime>
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#include <QFileDialog>
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/*! \brief The whiteboard widget.
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* Visualizes the whiteboard scene and provides different modes for editing and adding new elements.
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* Local edits to existing elements are handled by the elements themselves
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* as mouse events are passed on to them but new items are temporarily
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* added to the scene while being drawn and only when finished, added to
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* the WbScene.
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*
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* \sa WbScene
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* \sa WbDlg
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*/
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class WbWidget : public QGraphicsView
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{
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Q_OBJECT
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public:
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/*! \brief Mode
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* Indicates the mode the widget is in.
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*/
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enum Mode { Select, Translate, Rotate, Scale, Scroll, Erase, DrawPath, DrawLine, DrawRectangle, DrawEllipse, DrawCircle, DrawPolyline, DrawText, DrawImage };
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/*! \brief Constructor
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* Constructs a new widget with \a session and \a size with parent \a parent.
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* \a ownJid is the Jid that should be used in item IDs created by this widget.
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*/
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WbWidget(const QString &session, const QString &ownJid, const QSize &size, QWidget *parent=0);
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/*! \brief Processes an incoming whiteboard element.*/
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bool processWb(const QDomElement &wb);
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/*! \brief Returns the session this widget is visualizing.*/
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QString session();
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/*! \brief Returns the JID used by the user in the session.*/
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const QString & ownJid() const;
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/*! \brief Returns the mode this widget is in.*/
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Mode mode();
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/*! \brief Sets the mode which determines how to react to user interaction.*/
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void setMode(Mode mode);
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/*! \brief Sets the size of the whiteboard.*/
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void setSize(const QSize &s);
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/*! \brief Sets the stroke color of new items.*/
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void setStrokeColor(const QColor &color);
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/*! \brief Sets the stroke color of new items.*/
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void setFillColor(const QColor &color);
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/*! \brief Sets the stroke width of new items.*/
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void setStrokeWidth(int width);
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/*! \brief Sets whether configure edits are accepted regardless of version.
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* Default is false. Should be set true if the session state is Negotiation::DocumentBegun.
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*/
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void setImporting(bool);
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/*! \brief Returns the size set by setSize().*/
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virtual QSize sizeHint() const;
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/*! \brief A pointer to the WbScene.*/
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WbScene* scene;
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signals:
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/*! \brief Emitted when a new whiteboard element is ready to be sent.*/
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void newWb(const QDomElement &wb);
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public slots:
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/*! \brief Clears the whiteboard.
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* If \a sendEdits is true, the remove edits are sent.
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*/
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void clear(const bool &sendEdits = true);
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protected:
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/*! \brief Makes sure that area outside the whiteboard is not shown by zooming if necessary.*/
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virtual void resizeEvent(QResizeEvent * event);
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/*! \brief Passes events to items as specified by the mode.*/
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virtual void mousePressEvent(QMouseEvent * event);
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/*! \brief Passes events to items as specified by the mode.*/
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virtual void mouseMoveEvent(QMouseEvent * event);
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/*! \brief Passes events to items as specified by the mode.*/
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virtual void mouseReleaseEvent(QMouseEvent * event);
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private:
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/*! \brief The user interaction mode the widget is in.*/
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Mode mode_;
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/*! \brief The stroke color used for new items.*/
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QColor strokeColor_;
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/*! \brief The fill color used for new items.*/
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QColor fillColor_;
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/*! \brief The stroke width used for new items.*/
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int strokeWidth_;
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/*! \brief Pointer to a new item that is being drawn.*/
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WbItem* newWbItem_;
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/*! \brief Boolean used to force adding a vertex to a path being drawn.*/
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bool addVertex_;
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/*! \brief Pointer to a control point to be used for the next vertex.*/
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QPointF* controlPoint_;
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/*! \brief Timer used for forcing the addition of a new vertex.*/
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QTimer* adding_;
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private slots:
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/*! \brief Slot used for forcing the addition of a new vertex.*/
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void addVertex();
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};
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#endif
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