valentina/src/libs/vtools/tools/vgrainlineitem.cpp

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/************************************************************************
**
** @file vgrainlineitem.cpp
** @author Bojan Kverh
** @date September 10, 2016
**
** @brief
** @copyright
** This source code is part of the Valentine project, a pattern making
** program, whose allow create and modeling patterns of clothing.
** Copyright (C) 2013-2015 Valentina project
** <https://bitbucket.org/dismine/valentina> All Rights Reserved.
**
** Valentina 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.
**
** Valentina 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 Valentina. If not, see <http://www.gnu.org/licenses/>.
**
*************************************************************************/
#include <math.h>
#include <QPainter>
#include <QGraphicsSceneMouseEvent>
#include <QStyleOptionGraphicsItem>
#include <QDebug>
#include "../vmisc/def.h"
#include "../vmisc/vmath.h"
#include "vgrainlineitem.h"
#define ARROW_ANGLE M_PI/9
#define ARROW_LENGTH 15
#define RECT_WIDTH 30
#define RESIZE_RECT_SIZE 10
#define ROTATE_CIRC_R 7
#define ACTIVE_Z 10
#define INACTIVE_Z 5
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::VGrainlineItem constructor
* @param pParent pointer to the parent item
*/
VGrainlineItem::VGrainlineItem(QGraphicsItem* pParent)
:QGraphicsObject(pParent), m_eMode(VGrainlineItem::mNormal), m_bReleased(false), m_dRotation(0), m_dStartRotation(0),
m_dLength(0), m_rectBoundingBox(), m_polyBound(), m_ptStartPos(), m_ptStartMove(), m_dScale(1), m_polyResize(),
m_ptStart(), m_ptFinish(), m_ptCenter(), m_dAngle(0), m_eArrowType(VGrainlineGeometry::atBoth)
{
m_rectBoundingBox.setTopLeft(QPointF(0, 0));
setAcceptHoverEvents(true);
Reset();
UpdateRectangle();
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::~VGrainlineItem destructor
*/
VGrainlineItem::~VGrainlineItem()
{}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::paint paints the item content
* @param pP pointer to the painter object
* @param pOption not used
* @param pWidget not used
*/
void VGrainlineItem::paint(QPainter* pP, const QStyleOptionGraphicsItem* pOption, QWidget* pWidget)
{
Q_UNUSED(pOption);
Q_UNUSED(pWidget);
pP->save();
QColor clr = Qt::black;
pP->setPen(QPen(clr, 3));
QPointF pt1(0, 0);
QPointF pt2;
pt2.setX(pt1.x() + m_dLength * cos(m_dRotation));
pt2.setY(pt1.y() - m_dLength * sin(m_dRotation));
pP->setRenderHints(QPainter::Antialiasing);
// line
pP->drawLine(pt1, pt2);
pP->setBrush(clr);
QPolygonF poly;
QPointF ptA;
qreal dArrLen = ARROW_LENGTH*m_dScale;
if (m_eArrowType != VGrainlineGeometry::atRear)
{
// first arrow
poly << pt1;
ptA.setX(pt1.x() + dArrLen*cos(m_dRotation + ARROW_ANGLE));
ptA.setY(pt1.y() - dArrLen*sin(m_dRotation + ARROW_ANGLE));
poly << ptA;
ptA.setX(pt1.x() + dArrLen*cos(m_dRotation - ARROW_ANGLE));
ptA.setY(pt1.y() - dArrLen*sin(m_dRotation - ARROW_ANGLE));
poly << ptA;
pP->drawPolygon(poly);
}
if (m_eArrowType != VGrainlineGeometry::atFront)
{
// second arrow
poly.clear();
poly << pt2;
ptA.setX(pt2.x() + dArrLen*cos(M_PI + m_dRotation + ARROW_ANGLE));
ptA.setY(pt2.y() - dArrLen*sin(M_PI + m_dRotation + ARROW_ANGLE));
poly << ptA;
ptA.setX(pt2.x() + dArrLen*cos(M_PI + m_dRotation - ARROW_ANGLE));
ptA.setY(pt2.y() - dArrLen*sin(M_PI + m_dRotation - ARROW_ANGLE));
poly << ptA;
pP->drawPolygon(poly);
}
if (m_eMode != mNormal)
{
pP->setPen(QPen(clr, 2, Qt::DashLine));
pP->setBrush(Qt::NoBrush);
// bounding polygon
pP->drawPolygon(m_polyBound);
pP->setPen(QPen(clr, 3));
if (m_eMode != mRotate)
{
pP->setBrush(clr);
pP->drawPolygon(m_polyResize);
}
pP->setBrush(Qt::NoBrush);
if (m_eMode == mResize)
{
pP->setPen(clr);
pP->drawLine(m_polyBound.at(0), m_polyBound.at(2));
pP->drawLine(m_polyBound.at(1), m_polyBound.at(3));
}
if (m_eMode == mRotate)
{
QPointF ptC = (m_polyBound.at(0) + m_polyBound.at(2))/2;
qreal dRad = m_dScale * ROTATE_CIRC_R;
pP->setBrush(clr);
pP->drawEllipse(ptC, dRad, dRad);
pP->setBrush(Qt::NoBrush);
pP->save();
pP->translate(ptC);
pP->rotate(qRadiansToDegrees(-m_dRotation));
int iX = int(qRound(m_dLength/2 - 0.5*dRad));
int iY = int(qRound(RECT_WIDTH - 0.5*dRad));
int iR = int(qRound(dRad*3));
pP->drawArc(iX - iR, iY - iR, iR, iR, 0*16, -90*16);
pP->drawArc(-iX, iY - iR, iR, iR, 270*16, -90*16);
pP->drawArc(-iX, -iY, iR, iR, 180*16, -90*16);
pP->drawArc(iX - iR, -iY, iR, iR, 90*16, -90*16);
pP->restore();
}
}
pP->restore();
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::UpdateGeometry updates the item with grainline parameters
* @param ptPos position of one grainline's end
* @param dRotation rotation of the grainline in [degrees]
* @param dLength length of the grainline in user's units
*/
void VGrainlineItem::UpdateGeometry(const QPointF& ptPos, qreal dRotation, qreal dLength,
VGrainlineGeometry::ArrowType eAT)
{
m_dRotation = qDegreesToRadians(dRotation);
m_dLength = dLength;
qreal dX;
qreal dY;
QPointF pt = ptPos;
if (IsContained(pt, m_dRotation, dX, dY) == false)
{
pt.setX(pt.x() + dX);
pt.setY(pt.y() + dY);
}
setPos(pt);
m_eArrowType = eAT;
UpdateRectangle();
UpdateBox();
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::boundingRect returns the bounding rect around the grainline
* @return bounding rect
*/
QRectF VGrainlineItem::boundingRect() const
{
return m_rectBoundingBox;
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::Reset resets the item parameters.
*/
void VGrainlineItem::Reset()
{
m_bReleased = false;
m_eMode = mNormal;
setZValue(INACTIVE_Z);
UpdateBox();
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::IsIdle returns the idle flag.
* @return true, if item mode is normal and false otherwise.
*/
bool VGrainlineItem::IsIdle() const
{
return m_eMode == mNormal;
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::IsContained checks, if both ends of the grainline, starting at pt, are contained in
* parent widget.
* @param pt starting point of the grainline.
* @param dRot rotation of the grainline in [rad]
* @param dX horizontal translation needed to put the arrow inside parent item
* @param dY vertical translation needed to put the arrow inside parent item
* @return true, if both ends of the grainline, starting at pt, are contained in the parent widget and
* false otherwise.
*/
bool VGrainlineItem::IsContained(const QPointF& pt, qreal dRot, qreal &dX, qreal &dY) const
{
dX = 0;
dY = 0;
QPointF apt[2];
apt[0] = pt;
apt[1].setX(pt.x() + m_dLength * cos(dRot));
apt[1].setY(pt.y() - m_dLength * sin(dRot));
// single point differences
qreal dPtX;
qreal dPtY;
bool bInside = true;
QRectF rectParent = parentItem()->boundingRect();
for (int i = 0; i < 2; ++i)
{
dPtX = 0;
dPtY = 0;
if (rectParent.contains(apt[i]) == false)
{
if (apt[i].x() < rectParent.left())
{
dPtX = rectParent.left() - apt[i].x();
}
else if (apt[i].x() > rectParent.right())
{
dPtX = rectParent.right() - apt[i].x();
}
if (apt[i].y() < rectParent.top())
{
dPtY = rectParent.top() - apt[i].y();
}
else if (apt[i].y() > rectParent.bottom())
{
dPtY = rectParent.bottom() - apt[i].y();
}
if (fabs(dPtX) > fabs(dX))
{
dX = dPtX;
}
if (fabs(dPtY) > fabs(dY))
{
dY = dPtY;
}
bInside = false;
}
}
return bInside;
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::SetScale sets the scale for keeping the arrows of constant size
* @param dScale scale factor
*/
void VGrainlineItem::SetScale(qreal dScale)
{
m_dScale = dScale;
UpdateRectangle();
UpdateBox();
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::mousePressEvent handles left button mouse press events
* @param pME pointer to QGraphicsSceneMouseEvent object
*/
void VGrainlineItem::mousePressEvent(QGraphicsSceneMouseEvent* pME)
{
if (pME->button() == Qt::LeftButton)
{
m_ptStartPos = pos();
m_ptStartMove = pME->scenePos();
m_dStartLength = m_dLength;
m_dStartRotation = m_dRotation;
m_dAngle = GetAngle(mapToParent(pME->pos()));
m_ptRotCenter = m_ptCenter;
if (m_eMode != mRotate)
{
if (m_polyResize.containsPoint(pME->pos(), Qt::OddEvenFill) == true)
{
m_eMode = mResize;
SetOverrideCursor(Qt::SizeFDiagCursor);
}
else
{
m_eMode = mMove;
SetOverrideCursor(cursorArrowCloseHand, 1, 1);
}
}
else
{
SetOverrideCursor(cursorArrowCloseHand, 1, 1);
}
setZValue(ACTIVE_Z);
UpdateBox();
}
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::mouseMoveEvent handles mouse move events, making sure that the item is moved properly
* @param pME pointer to QGraphicsSceneMouseEvent object
*/
void VGrainlineItem::mouseMoveEvent(QGraphicsSceneMouseEvent* pME)
{
QPointF ptDiff = pME->scenePos() - m_ptStartMove;
qreal dX;
qreal dY;
if (m_eMode == mMove)
{
QPointF pt = m_ptStartPos + ptDiff;
if (IsContained(pt, m_dRotation, dX, dY) == false)
{
pt.setX(pt.x() + dX);
pt.setY(pt.y() + dY);
}
setPos(pt);
UpdateBox();
}
else if (m_eMode == mResize)
{
qreal dLen = qSqrt(ptDiff.x()*ptDiff.x() + ptDiff.y()*ptDiff.y());
qreal dAng = qAtan2(-ptDiff.y(), ptDiff.x());
dLen = dLen*qCos(dAng - m_dRotation);
qreal dPrevLen = m_dLength;
// try with new length
m_dLength = m_dStartLength + dLen;
qreal dX;
qreal dY;
if (IsContained(m_ptStartPos, m_dRotation, dX, dY) == false)
{
m_dLength = dPrevLen;
}
UpdateRectangle();
UpdateBox();
}
else if (m_eMode == mRotate)
{
// prevent strange angle changes due to singularities
qreal dLen = qSqrt(ptDiff.x()*ptDiff.x() + ptDiff.y()*ptDiff.y());
if (dLen < 2)
{
return;
}
if (fabs(m_dAngle) < 0.01)
{
m_dAngle = GetAngle(mapToParent(pME->pos()));
return;
}
qreal dAng = GetAngle(mapToParent(pME->pos())) - m_dAngle;
QPointF ptNewPos = Rotate(m_ptStartPos, m_ptRotCenter, dAng);
if (IsContained(ptNewPos, m_dStartRotation + dAng, dX, dY) == true)
{
setPos(ptNewPos);
m_dRotation = m_dStartRotation + dAng;
UpdateRectangle();
UpdateBox();
}
}
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::mouseReleaseEvent handles mouse release events and emits the proper signal if the item was
* moved
* @param pME pointer to QGraphicsSceneMouseEvent object
*/
void VGrainlineItem::mouseReleaseEvent(QGraphicsSceneMouseEvent* pME)
{
if (pME->button() == Qt::LeftButton)
{
if (m_eMode == mMove || m_eMode == mRotate)
{
RestoreOverrideCursor(cursorArrowCloseHand);
}
else if (m_eMode == mResize)
{
RestoreOverrideCursor(Qt::SizeFDiagCursor);
}
QPointF ptDiff = pME->scenePos() - m_ptStartMove;
qreal dLen = qSqrt(ptDiff.x()*ptDiff.x() + ptDiff.y()*ptDiff.y());
bool bShort = (dLen < 2);
if (m_eMode == mMove || m_eMode == mResize)
{
if (bShort == true)
{
if (m_bReleased == true)
{
m_eMode = mRotate;
UpdateBox();
}
}
else
{
if (m_eMode == mMove)
{
emit SignalMoved(pos());
}
else
{
emit SignalResized(m_dLength);
}
UpdateBox();
}
}
else
{
if (bShort == true)
{
m_eMode = mMove;
}
else
{
emit SignalRotated(m_dRotation, m_ptStart);
}
UpdateBox();
}
m_bReleased = true;
}
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::UpdateBox updates the item
*/
void VGrainlineItem::UpdateBox()
{
update(m_rectBoundingBox);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::UpdateRectangle updates the polygon for the box around active item
* and the bounding rectangle
*/
void VGrainlineItem::UpdateRectangle()
{
m_polyBound.clear();
QPointF pt1(0, 0);
QPointF pt2;
pt2.setX(pt1.x() + m_dLength * cos(m_dRotation));
pt2.setY(pt1.y() - m_dLength * sin(m_dRotation));
m_ptStart = mapToParent(pt1);
m_ptFinish = mapToParent(pt2);
m_ptCenter = (m_ptStart + m_ptFinish)/2;
QPointF ptA;
ptA.setX(pt1.x() + RECT_WIDTH*cos(m_dRotation + M_PI/2));
ptA.setY(pt1.y() - RECT_WIDTH*sin(m_dRotation + M_PI/2));
m_polyBound << ptA;
ptA.setX(pt1.x() + RECT_WIDTH*cos(m_dRotation - M_PI/2));
ptA.setY(pt1.y() - RECT_WIDTH*sin(m_dRotation - M_PI/2));
m_polyBound << ptA;
ptA.setX(pt2.x() + RECT_WIDTH*cos(m_dRotation - M_PI/2));
ptA.setY(pt2.y() - RECT_WIDTH*sin(m_dRotation - M_PI/2));
m_polyBound << ptA;
ptA.setX(pt2.x() + RECT_WIDTH*cos(m_dRotation + M_PI/2));
ptA.setY(pt2.y() - RECT_WIDTH*sin(m_dRotation + M_PI/2));
m_polyBound << ptA;
m_rectBoundingBox = m_polyBound.boundingRect();
setTransformOriginPoint(m_rectBoundingBox.center());
m_polyResize.clear();
ptA = m_polyBound.at(2);
m_polyResize << ptA;
double dSize = m_dScale * RESIZE_RECT_SIZE;
ptA.setX(ptA.x() + dSize*cos(m_dRotation + M_PI/2));
ptA.setY(ptA.y() - dSize*sin(m_dRotation + M_PI/2));
m_polyResize << ptA;
ptA.setX(ptA.x() - dSize*cos(m_dRotation));
ptA.setY(ptA.y() + dSize*sin(m_dRotation));
m_polyResize << ptA;
ptA.setX(ptA.x() + dSize*cos(m_dRotation - M_PI/2));
ptA.setY(ptA.y() - dSize*sin(m_dRotation - M_PI/2));
m_polyResize << ptA;
prepareGeometryChange();
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::GetAngle calculates the angle between the line, which goes from
* rotation center to pt and x axis
* @param pt point of interest
* @return the angle between line from rotation center and point of interest and x axis
*/
qreal VGrainlineItem::GetAngle(const QPointF& pt) const
{
double dX = pt.x() - m_ptRotCenter.x();
double dY = pt.y() - m_ptRotCenter.y();
if (fabs(dX) < 1 && fabs(dY) < 1)
{
return 0;
}
else
{
return qAtan2(-dY, dX);
}
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::Rotate rotates point pt around ptCenter by angle dAng [rad]
* and returns the resulting point
* @param pt point to rotate
* @param ptCenter center of rotation
* @param dAng angle of rotation
* @return point, which is a result of rotating pt around ptCenter by angle dAng
*/
QPointF VGrainlineItem::Rotate(const QPointF& pt, const QPointF& ptCenter, qreal dAng) const
{
QPointF ptRel = pt - ptCenter;
QPointF ptFinal;
ptFinal.setX(ptRel.x()*qCos(dAng) + ptRel.y()*qSin(dAng));
ptFinal.setY(-ptRel.x()*qSin(dAng) + ptRel.y()*qCos(dAng));
ptFinal += ptCenter;
return ptFinal;
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::GetInsideCorner calculates a point inside the bounding polygon,
* dDist away of i-th point in each direction
* @param i index of corner
* @param dDist distance
* @return resulting point
*/
QPointF VGrainlineItem::GetInsideCorner(int i, qreal dDist) const
{
QPointF pt1 = m_polyBound.at((i + 1) % m_polyBound.count()) - m_polyBound.at(i);
QPointF pt2 = m_polyBound.at((i + m_polyBound.count() - 1) % m_polyBound.count()) - m_polyBound.at(i);
pt1 = dDist*pt1/qSqrt(pt1.x()*pt1.x() + pt1.y()*pt1.y());
pt2 = dDist*pt2/qSqrt(pt2.x()*pt2.x() + pt2.y()*pt2.y());
return m_polyBound.at(i) + pt1 + pt2;
}