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OpenBoard/src/tools/UBGraphicsCompass.h

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/*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 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 General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef UBGRAPHICSCOMPASS_H_
#define UBGRAPHICSCOMPASS_H_
#include <QtGui>
#include <QtSvg>
#include "core/UB.h"
#include "domain/UBItem.h"
class UBGraphicsScene;
class UBGraphicsCompass: public QObject, public QGraphicsRectItem, public UBItem
{
Q_OBJECT;
public:
UBGraphicsCompass();
virtual ~UBGraphicsCompass();
enum { Type = UBGraphicsItemType::CompassItemType };
virtual int type() const
{
return Type;
}
virtual UBItem* deepCopy() const;
signals:
void hidden();
protected:
virtual void paint(QPainter *painter, const QStyleOptionGraphicsItem *styleOption, QWidget *widget);
virtual QVariant itemChange(GraphicsItemChange change, const QVariant &value);
// Events
virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);
virtual void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
virtual void hoverEnterEvent(QGraphicsSceneHoverEvent *event);
virtual void hoverLeaveEvent(QGraphicsSceneHoverEvent *event);
virtual void hoverMoveEvent(QGraphicsSceneHoverEvent *event);
private slots:
void penColorChanged();
void lineWidthChanged();
private:
// Helpers
void paintAngleDisplay(QPainter *painter);
void paintRadiusDisplay(QPainter *painter);
void rotateAroundNeedle(qreal angle);
void drawArc();
void updateResizeCursor();
void updateDrawCursor();
void paintCenterCross();
QCursor moveCursor() const;
QCursor resizeCursor() const;
QCursor rotateCursor() const;
QCursor closeCursor() const;
QCursor drawCursor() const;
QRectF hingeRect() const;
QPointF needlePosition() const;
QPointF pencilPosition() const;
QRectF closeButtonRect() const;
QRectF resizeButtonRect() const;
virtual QPainterPath shape() const;
QPainterPath needleShape() const;
QPainterPath pencilShape() const;
QPainterPath needleBaseShape() const;
QPainterPath needleArmShape() const;
QPainterPath hingeShape() const;
QPainterPath pencilBaseShape() const;
QPainterPath pencilArmShape() const;
UBGraphicsScene* scene() const;
QColor drawColor() const;
QColor middleFillColor() const;
QColor edgeFillColor() const;
QFont font() const;
qreal angleInDegrees() const;
// Members
QCursor mOuterCursor;
QCursor mResizeCursor;
QCursor mDrawCursor;
bool mResizing;
bool mRotating;
bool mDrawing;
bool mShowButtons;
qreal mSpanAngleInDegrees;
QPointF mSceneArcStartPoint;
bool mDrewCircle;
QGraphicsSvgItem* mCloseSvgItem;
QGraphicsSvgItem* mResizeSvgItem;
qreal mAntiScaleRatio;
bool mDrewCenterCross;
// Constants
static const QRect sDefaultRect;
static const int sNeedleLength = 24;
static const int sNeedleBaseLength = 16;
static const int sPencilLength = 16;
static const int sPencilBaseLength = 24;
static const int sMinRadius;
static const int sDegreeToQtAngleUnit = 16;
static const int sFillTransparency = 127;
static const int sDrawTransparency = 192;
static const QColor sLightBackgroundEdgeFillColor;
static const QColor sLightBackgroundMiddleFillColor;
static const QColor sLightBackgroundDrawColor;
static const QColor sDarkBackgroundEdgeFillColor;
static const QColor sDarkBackgroundMiddleFillColor;
static const QColor sDarkBackgroundDrawColor;
static const int sPixelsPerMillimeter = 5;
static const int sDisplayRadiusOnPencilArmMinLength = 300;
static const int sDisplayRadiusUnitMinLength = 250;
};
#endif /* UBGRAPHICSCOMPASS_H_ */