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valentina_old/src/libs/vwidgets/vgrainlineitem.cpp
Roman Telezhynskyi e9abab4eb2 Fix bug in Valentina. 
Each QGaphicsItem should make accepted mouse press event if it accept an event.

--HG--
branch : develop
2017-10-31 10:31:50 +02:00

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/************************************************************************
**
** @file vgrainlineitem.cpp
** @author Bojan Kverh
** @date September 10, 2016
**
** @brief
** @copyright
** This source code is part of the Valentina 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 <QGraphicsScene>
#include <QGraphicsView>
#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 LINE_PEN_WIDTH 3
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::VGrainlineItem constructor
* @param pParent pointer to the parent item
*/
VGrainlineItem::VGrainlineItem(QGraphicsItem* pParent)
: VPieceItem(pParent),
m_dRotation(0),
m_dStartRotation(0),
m_dLength(0),
m_polyBound(),
m_ptStartPos(),
m_ptStartMove(),
m_dScale(1),
m_polyResize(),
m_dStartLength(0),
m_ptStart(),
m_ptFinish(),
m_ptCenter(),
m_dAngle(0),
m_eArrowType(ArrowType::atBoth),
m_penWidth(LINE_PEN_WIDTH)
{
setAcceptHoverEvents(true);
m_inactiveZ = 5;
Reset();
UpdateRectangle();
}
//---------------------------------------------------------------------------------------------------------------------
QPainterPath VGrainlineItem::shape() const
{
if (m_eMode == mNormal)
{
return MainShape();
}
else
{
QPainterPath path;
path.addPolygon(m_polyBound);
return path;
}
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @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, m_penWidth, Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
pP->setRenderHints(QPainter::Antialiasing);
// line
const QLineF mainLine = MainLine();
pP->drawLine(mainLine.p1(), mainLine.p2());
pP->setBrush(clr);
m_dScale = GetScale();
qreal dArrLen = ARROW_LENGTH*m_dScale;
if (m_eArrowType != ArrowType::atRear)
{
// first arrow
pP->drawPolygon(FirstArrow(dArrLen));
}
if (m_eArrowType != ArrowType::atFront)
{
// second arrow
pP->drawPolygon(SecondArrow(dArrLen));
}
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);
UpdatePolyResize();
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, 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();
Update();
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @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::mousePressEvent handles left button mouse press events
* @param pME pointer to QGraphicsSceneMouseEvent object
*/
void VGrainlineItem::mousePressEvent(QGraphicsSceneMouseEvent* pME)
{
if (pME->button() == Qt::LeftButton && pME->type() != QEvent::GraphicsSceneMouseDoubleClick
&& (flags() & QGraphicsItem::ItemIsMovable))
{
if (m_moveType == NotMovable)
{
pME->ignore();
return;
}
pME->accept();
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_moveType & AllModifications ) == AllModifications)
{
AllUserModifications(pME->pos());
setZValue(ACTIVE_Z);
Update();
}
else if (m_moveType & IsRotatable)
{
if (m_moveType & IsResizable)
{
AllUserModifications(pME->pos());
}
else if (m_moveType & IsMovable)
{
UserRotateAndMove();
}
else
{
m_eMode = mRotate;
SetItemOverrideCursor(this, cursorArrowCloseHand, 1, 1);
}
setZValue(ACTIVE_Z);
Update();
}
else if (m_moveType & IsResizable)
{
if (m_moveType & IsRotatable)
{
AllUserModifications(pME->pos());
}
else if (m_moveType & IsMovable)
{
UserMoveAndResize(pME->pos());
}
setZValue(ACTIVE_Z);
Update();
}
else if (m_moveType & IsMovable)
{
if (m_moveType & IsRotatable)
{
UserRotateAndMove();
}
else if (m_moveType & IsResizable)
{
UserMoveAndResize(pME->pos());
}
else
{
m_eMode = mMove;
SetItemOverrideCursor(this, cursorArrowCloseHand, 1, 1);
}
setZValue(ACTIVE_Z);
Update();
}
else
{
pME->ignore();
}
}
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @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 && m_moveType & IsMovable)
{
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);
Update();
}
else if (m_eMode == mResize && m_moveType & IsResizable)
{
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
if (not (m_moveType & IsMovable))
{
dLen *= 2;
}
m_dLength = m_dStartLength + dLen;
QPointF pos;
if (m_moveType & IsMovable)
{
QLineF grainline(this->pos().x(), this->pos().y(),
this->pos().x() + dPrevLen, this->pos().y());
grainline.setAngle(qRadiansToDegrees(m_dRotation));
grainline = QLineF(grainline.p2(), grainline.p1());
grainline.setLength(m_dLength);
pos = grainline.p2();
}
else
{
QLineF grainline(m_ptCenter.x(), m_ptCenter.y(),
m_ptCenter.x() + m_dLength / 2.0, m_ptCenter.y());
grainline.setAngle(qRadiansToDegrees(m_dRotation));
grainline = QLineF(grainline.p2(), grainline.p1());
grainline.setLength(m_dLength);
pos = grainline.p2();
}
qreal dX;
qreal dY;
if (IsContained(pos, m_dRotation, dX, dY) == false)
{
m_dLength = dPrevLen;
}
else
{
setPos(pos);
}
UpdateRectangle();
Update();
}
else if (m_eMode == mRotate && m_moveType & IsRotatable)
{
// 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();
Update();
}
}
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @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 || m_eMode == mResize) && (flags() & QGraphicsItem::ItemIsMovable))
{
SetItemOverrideCursor(this, cursorArrowOpenHand, 1, 1);
}
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_moveType & IsRotatable)
{
m_eMode = mRotate;
Update();
}
}
else
{
if (m_eMode == mMove && m_moveType & IsMovable)
{
emit SignalMoved(pos());
}
else if (m_moveType & IsResizable)
{
emit SignalResized(m_dLength);
}
Update();
}
}
else
{
if (bShort == true)
{
m_eMode = mMove;
}
else if (m_moveType & IsRotatable)
{
emit SignalRotated(m_dRotation, m_ptStart);
}
Update();
}
m_bReleased = true;
}
}
//---------------------------------------------------------------------------------------------------------------------
void VGrainlineItem::hoverEnterEvent(QGraphicsSceneHoverEvent *pME)
{
if (flags() & QGraphicsItem::ItemIsMovable)
{
SetItemOverrideCursor(this, cursorArrowOpenHand, 1, 1);
m_penWidth = LINE_PEN_WIDTH + 1;
}
VPieceItem::hoverEnterEvent(pME);
}
//---------------------------------------------------------------------------------------------------------------------
void VGrainlineItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *pME)
{
if (flags() & QGraphicsItem::ItemIsMovable)
{
m_penWidth = LINE_PEN_WIDTH;
}
VPieceItem::hoverLeaveEvent(pME);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::UpdateBox updates the item
*/
void VGrainlineItem::Update()
{
update(m_rectBoundingBox);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VGrainlineItem::UpdateRectangle updates the polygon for the box around active item
* and the bounding rectangle
*/
void VGrainlineItem::UpdateRectangle()
{
QPointF pt1(0, 0);
QPointF pt2(pt1.x() + m_dLength * cos(m_dRotation), pt1.y() - m_dLength * sin(m_dRotation));
m_ptStart = mapToParent(pt1);
m_ptFinish = mapToParent(pt2);
m_ptCenter = (m_ptStart + m_ptFinish)/2;
m_polyBound.clear();
m_polyBound << QPointF(pt1.x() + RECT_WIDTH*cos(m_dRotation + M_PI/2),
pt1.y() - RECT_WIDTH*sin(m_dRotation + M_PI/2));
m_polyBound << QPointF(pt1.x() + RECT_WIDTH*cos(m_dRotation - M_PI/2),
pt1.y() - RECT_WIDTH*sin(m_dRotation - M_PI/2));
m_polyBound << QPointF(pt2.x() + RECT_WIDTH*cos(m_dRotation - M_PI/2),
pt2.y() - RECT_WIDTH*sin(m_dRotation - M_PI/2));
m_polyBound << QPointF(pt2.x() + RECT_WIDTH*cos(m_dRotation + M_PI/2),
pt2.y() - RECT_WIDTH*sin(m_dRotation + M_PI/2));
m_rectBoundingBox = m_polyBound.boundingRect().adjusted(-2, -2, 2, 2);
setTransformOriginPoint(m_rectBoundingBox.center());
UpdatePolyResize();
prepareGeometryChange();
}
//---------------------------------------------------------------------------------------------------------------------
double VGrainlineItem::GetAngle(const QPointF &pt) const
{
return -VPieceItem::GetAngle(pt);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @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;
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief GetScale gets the scale for keeping the arrows of constant size
*/
qreal VGrainlineItem::GetScale() const
{
if (scene()->views().count() > 0)
{
const QPoint pt0 = scene()->views().at(0)->mapFromScene(0, 0);
const QPoint pt = scene()->views().at(0)->mapFromScene(0, 100);
const QPoint p = pt - pt0;
qreal dScale = qSqrt(QPoint::dotProduct(p, p));
dScale = 100.0/dScale;
if (dScale < 1.0)
{
dScale = 1.0;
}
return dScale;
}
return 1.0;
}
//---------------------------------------------------------------------------------------------------------------------
QLineF VGrainlineItem::MainLine() const
{
QPointF pt1;
QPointF pt2(pt1.x() + m_dLength * cos(m_dRotation), pt1.y() - m_dLength * sin(m_dRotation));
return QLineF(pt1, pt2);
}
//---------------------------------------------------------------------------------------------------------------------
QPolygonF VGrainlineItem::FirstArrow(qreal dArrLen) const
{
const QPointF pt2 = MainLine().p2();
QPolygonF poly;
poly << pt2;
poly << QPointF(pt2.x() + dArrLen*cos(M_PI + m_dRotation + ARROW_ANGLE),
pt2.y() - dArrLen*sin(M_PI + m_dRotation + ARROW_ANGLE));
poly << QPointF(pt2.x() + dArrLen*cos(M_PI + m_dRotation - ARROW_ANGLE),
pt2.y() - dArrLen*sin(M_PI + m_dRotation - ARROW_ANGLE));
return poly;
}
//---------------------------------------------------------------------------------------------------------------------
QPolygonF VGrainlineItem::SecondArrow(qreal dArrLen) const
{
const QPointF pt1 = MainLine().p1();
QPolygonF poly;
poly << pt1;
poly << QPointF(pt1.x() + dArrLen*cos(m_dRotation + ARROW_ANGLE),
pt1.y() - dArrLen*sin(m_dRotation + ARROW_ANGLE));
poly << QPointF(pt1.x() + dArrLen*cos(m_dRotation - ARROW_ANGLE),
pt1.y() - dArrLen*sin(m_dRotation - ARROW_ANGLE));
return poly;
}
//---------------------------------------------------------------------------------------------------------------------
QPainterPath VGrainlineItem::MainShape() const
{
QPainterPath path;
const QLineF mainLine = MainLine();
QPainterPath linePath;
linePath.moveTo(mainLine.p1());
linePath.lineTo(mainLine.p2());
linePath.closeSubpath();
QPainterPathStroker stroker;
stroker.setWidth(m_penWidth);
path.addPath((stroker.createStroke(linePath) + linePath).simplified());
path.closeSubpath();
const qreal dArrLen = ARROW_LENGTH*GetScale();
if (m_eArrowType != ArrowType::atRear)
{
// first arrow
QPainterPath polyPath;
polyPath.addPolygon(FirstArrow(dArrLen));
path.addPath((stroker.createStroke(polyPath) + polyPath).simplified());
path.closeSubpath();
}
if (m_eArrowType != ArrowType::atFront)
{
// second arrow
QPainterPath polyPath;
polyPath.addPolygon(SecondArrow(dArrLen));
path.addPath((stroker.createStroke(polyPath) + polyPath).simplified());
path.closeSubpath();
}
return path;
}
//---------------------------------------------------------------------------------------------------------------------
void VGrainlineItem::AllUserModifications(const QPointF &pos)
{
if (m_eMode != mRotate)
{
UserMoveAndResize(pos);
}
else
{
SetItemOverrideCursor(this, cursorArrowCloseHand, 1, 1);
}
}
//---------------------------------------------------------------------------------------------------------------------
void VGrainlineItem::UserRotateAndMove()
{
if (m_eMode != mRotate)
{
m_eMode = mMove;
}
SetItemOverrideCursor(this, cursorArrowCloseHand, 1, 1);
}
//---------------------------------------------------------------------------------------------------------------------
void VGrainlineItem::UserMoveAndResize(const QPointF &pos)
{
if (m_polyResize.containsPoint(pos, Qt::OddEvenFill) == true)
{
m_eMode = mResize;
setCursor(Qt::SizeFDiagCursor);
}
else
{
m_eMode = mMove; // block later if need
SetItemOverrideCursor(this, cursorArrowCloseHand, 1, 1);
}
}
//---------------------------------------------------------------------------------------------------------------------
void VGrainlineItem::UpdatePolyResize()
{
m_polyResize.clear();
QPointF ptA = m_polyBound.at(1);
m_polyResize << ptA;
const 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;
}
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