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canvas.h
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canvas.h
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/***************************************************************************
* Copyright (C) 2010 Brno University of Technology, *
* Faculty of Information Technology *
* Author(s): Marek Vavrusa <xvavru00 AT stud.fit.vutbr.cz> *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU Library General Public License as *
* published by the Free Software Foundation; either version 2 of the *
* License, or (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef CANVAS_H
#define CANVAS_H
#include <QGraphicsScene>
#include <QPalette>
class CanvasMgr;
class QPainter;
class QGraphicsSceneMouseEvent;
class QGraphicsColorizeEffect;
class Canvas : public QGraphicsScene
{
Q_OBJECT
Q_PROPERTY(QString name READ name WRITE setName)
public:
/// State tracking
enum State {
Idle = 0x00, // Not interacting
Drawing = 0x01, // Drawing path
Gesture = 0x02 // Drawing mouse gesture
};
/// Tool
enum Tool {
NoTool = 0,// Invalid tool
Pen, // Pen tool
Eraser, // Eraser
Transform, // Transform
Brush, // Brush
Picker // Color picker
};
/** Constructor. */
Canvas(const QString& name = "Canvas", CanvasMgr* parent = 0);
/** Return canvas name.
* \return canvas name
*/
const QString& name() { return mName; }
/** Set canvas name to given value.
* \param name new name
*/
void setName(const QString& name) {
mName = name;
}
/** Return items. */
QList<QGraphicsPathItem*> pathItems() const;
/** Return color. */
QColor color(QPalette::ColorRole role = QPalette::Foreground) {
if(role == QPalette::Background)
return mBrush.color();
return mPen.color();
}
/** Set color. */
void setColor(QPalette::ColorRole role, const QColor& color) {
if(role == QPalette::Background)
mBrush.setColor(color);
else
mPen.setColor(color);
}
/** Return thickness. */
int thickness() {
return mPen.width();
}
/** Set thickness. */
void setThickness(int width) {
mPen.setWidth(width);
}
/** Return tool. */
Tool tool() {
return mTool;
}
/** Set tool. */
void setTool(Tool tool) {
mTool = tool;
}
/** Reimplement remove. */
void removeItem(QGraphicsItem* item) {
if(item == mHovered)
mHovered = 0;
QGraphicsScene::removeItem(item);
}
/** Create associated canvas view.
* \param parent - parent widget for view
* \return view associated with canvas
*/
QGraphicsView* createView(QWidget* parent = 0);
/** Return default canvas size.
\return canvas size
*/
static QSize defaultSizeHint() {
return QSize(640, 480);
}
public slots:
void importPath(QPainterPath path, QPen pen, QBrush brush) {
addPath(path, pen, brush);
update();
}
signals:
/** Signalizing new path on canvas.
* Signal is emmited only when path is painted non-programatically,
* e.g. by mouse/touch interface.
* \param path new path
*/
void pathCreated(Canvas* canvas, QGraphicsPathItem* item);
/** Signalizing new gesture on canvas.
* \param gesture created gesture
*/
void gestureCreated(QPainterPath gesture);
protected:
void mouseMoveEvent(QGraphicsSceneMouseEvent* e);
void mousePressEvent(QGraphicsSceneMouseEvent* e);
void mouseReleaseEvent(QGraphicsSceneMouseEvent* e);
friend class NetworkWorker;
private:
int mState;
QGraphicsPathItem* mGlyph;
QString mName;
bool mImported;
QPen mPen;
QBrush mBrush;
Tool mTool;
QGraphicsItem* mHovered;
QGraphicsColorizeEffect* mEffect;
};
#endif // CANVAS_H