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valentina/src/libs/vwidgets/vtextgraphicsitem.cpp
Roman Telezhynskyi 790e276102 SonarQube warnings. 
--HG--
branch : develop
2017-10-30 12:16:58 +02:00

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/************************************************************************
**
** @file vtextgraphicsitem.cpp
** @author Bojan Kverh
** @date June 16, 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 <QColor>
#include <QFlags>
#include <QFont>
#include <QGraphicsItem>
#include <QGraphicsSceneHoverEvent>
#include <QGraphicsSceneMouseEvent>
#include <QPainter>
#include <QPen>
#include <QPoint>
#include <QStyleOptionGraphicsItem>
#include <Qt>
#include <QDebug>
#include "../vmisc/def.h"
#include "../vmisc/vmath.h"
#include "vtextgraphicsitem.h"
const qreal resizeSquare = (3./*mm*/ / 25.4) * PrintDPI;
const qreal rotateCircle = (2./*mm*/ / 25.4) * PrintDPI;
#define ROTATE_RECT 60
#define ROTATE_ARC 50
const qreal minW = (4./*mm*/ / 25.4) * PrintDPI + resizeSquare;
const qreal minH = (4./*mm*/ / 25.4) * PrintDPI + resizeSquare;
#define ACTIVE_Z 10
namespace
{
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief GetBoundingRect calculates the bounding box around rectBB rectangle, rotated around its center by dRot degrees
* @param rectBB rectangle of interest
* @param dRot rectangle rotation
* @return bounding box around rectBB rotated by dRot
*/
QRectF GetBoundingRect(QRectF rectBB, qreal dRot)
{
QPointF apt[4] = { rectBB.topLeft(), rectBB.topRight(), rectBB.bottomLeft(), rectBB.bottomRight() };
QPointF ptCenter = rectBB.center();
qreal dX1 = 0;
qreal dX2 = 0;
qreal dY1 = 0;
qreal dY2 = 0;
double dAng = qDegreesToRadians(dRot);
for (int i = 0; i < 4; ++i)
{
QPointF pt = apt[i] - ptCenter;
qreal dX = pt.x()*cos(dAng) + pt.y()*sin(dAng);
qreal dY = -pt.x()*sin(dAng) + pt.y()*cos(dAng);
if (i == 0)
{
dX1 = dX2 = dX;
dY1 = dY2 = dY;
}
else
{
if (dX < dX1)
{
dX1 = dX;
}
else if (dX > dX2)
{
dX2 = dX;
}
if (dY < dY1)
{
dY1 = dY;
}
else if (dY > dY2)
{
dY2 = dY;
}
}
}
QRectF rect;
rect.setTopLeft(ptCenter + QPointF(dX1, dY1));
rect.setWidth(dX2 - dX1);
rect.setHeight(dY2 - dY1);
return rect;
}
}//static functions
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::VTextGraphicsItem constructor
* @param pParent pointer to the parent item
*/
VTextGraphicsItem::VTextGraphicsItem(QGraphicsItem* pParent)
: VPieceItem(pParent),
m_ptStartPos(),
m_ptStart(),
m_szStart(),
m_dRotation(0),
m_dAngle(0),
m_rectResize(),
m_tm()
{
m_inactiveZ = 2;
SetSize(minW, minH);
setZValue(m_inactiveZ);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::SetFont sets the item font
* @param fnt font to be used in item
*/
void VTextGraphicsItem::SetFont(const QFont& fnt)
{
m_tm.SetFont(fnt);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::paint redraws the item content
* @param painter pointer to the QPainter in use
* @param option pointer to the object containing the actual label rectangle
* @param widget not used
*/
void VTextGraphicsItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
Q_UNUSED(widget)
Q_UNUSED(option)
painter->fillRect(m_rectBoundingBox, QColor(251, 251, 175));
painter->setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);
painter->setPen(Qt::black);
QFont fnt = m_tm.GetFont();
int iW = qFloor(boundingRect().width());
// draw text lines
int iY = 0;
for (int i = 0; i < m_tm.GetSourceLinesCount(); ++i)
{
const TextLine& tl = m_tm.GetSourceLine(i);
fnt.setPixelSize(m_tm.GetFont().pixelSize() + tl.m_iFontSize);
fnt.setBold(tl.bold);
fnt.setItalic(tl.italic);
QString qsText = tl.m_qsText;
QFontMetrics fm(fnt);
// check if the next line will go out of bounds
if (iY + fm.height() > boundingRect().height())
{
break;
}
if (fm.width(qsText) > iW)
{
qsText = fm.elidedText(qsText, Qt::ElideMiddle, iW);
}
painter->setFont(fnt);
painter->drawText(0, iY, iW, fm.height(), static_cast<int>(tl.m_eAlign), qsText);
iY += fm.height() + m_tm.GetSpacing();
}
// now draw the features specific to non-normal modes
if (m_eMode != mNormal)
{
// outline the rectangle
painter->setPen(QPen(Qt::black, 2, Qt::DashLine));
painter->drawRect(boundingRect().adjusted(1, 1, -1, -1));
if (m_eMode != mRotate)
{
// draw the resize square
painter->setPen(Qt::black);
painter->setBrush(Qt::black);
painter->drawRect(m_rectResize.adjusted(-1, -1, -1, -1));
if (m_eMode == mResize)
{
// draw the resize diagonal lines
painter->drawLine(1, 1, qFloor(m_rectBoundingBox.width())-1, qFloor(m_rectBoundingBox.height())-1);
painter->drawLine(1, qFloor(m_rectBoundingBox.height())-1, qFloor(m_rectBoundingBox.width())-1, 1);
}
}
else
{
// in rotate mode, draw the circle in the middle
painter->setPen(Qt::black);
painter->setBrush(Qt::black);
painter->drawEllipse(
QPointF(m_rectBoundingBox.width()/2, m_rectBoundingBox.height()/2),
rotateCircle,
rotateCircle
);
if (m_rectBoundingBox.width() > minW*3 && m_rectBoundingBox.height() > minH*3)
{
painter->setPen(QPen(Qt::black, 3));
painter->setBrush(Qt::NoBrush);
// and then draw the arc in each of the corners
int iTop = ROTATE_RECT - ROTATE_ARC;
int iLeft = ROTATE_RECT - ROTATE_ARC;
int iRight = qRound(m_rectBoundingBox.width()) - ROTATE_RECT;
int iBottom = qRound(m_rectBoundingBox.height()) - ROTATE_RECT;
painter->drawArc(iLeft, iTop, ROTATE_ARC, ROTATE_ARC, 180*16, -90*16);
painter->drawArc(iRight, iTop, ROTATE_ARC, ROTATE_ARC, 90*16, -90*16);
painter->drawArc(iLeft, iBottom, ROTATE_ARC, ROTATE_ARC, 270*16, -90*16);
painter->drawArc(iRight, iBottom, ROTATE_ARC, ROTATE_ARC, 0*16, -90*16);
}
}
}
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::SetSize Tries to set the label size to (fW, fH). If any of those is too small, the label
* size does not change.
* @param fW label width
* @param fH label height
*/
void VTextGraphicsItem::SetSize(qreal fW, qreal fH)
{
qDebug() << "Setting size to" << fW << parentItem()->boundingRect().width();
// don't allow resize under specific size
if (fW > parentItem()->boundingRect().width())
{
fW = parentItem()->boundingRect().width();
}
if (fW < minW)
{
fW = minW;
}
if (fH > parentItem()->boundingRect().height())
{
fH = parentItem()->boundingRect().height();
}
if (fH < minH)
{
fH = minH;
}
prepareGeometryChange();
qDebug() << "Actual size set to" << fW;
m_rectBoundingBox.setTopLeft(QPointF(0, 0));
m_rectBoundingBox.setWidth(fW);
m_rectBoundingBox.setHeight(fH);
m_rectResize.setTopLeft(QPointF(fW - resizeSquare, fH - resizeSquare));
m_rectResize.setWidth(resizeSquare);
m_rectResize.setHeight(resizeSquare);
setTransformOriginPoint(m_rectBoundingBox.center());
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::Update sets the correct size and font size and redraws the label
*/
void VTextGraphicsItem::Update()
{
CorrectLabel();
UpdateBox();
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::IsContained checks if the bounding box around rotated rectBB is contained in
* the parent. If that is not the case, it calculates the amount of movement needed to put it inside the parent
* and write it into dX, dY
* @param rectBB bounding box in question
* @param dRot bounding box rotation in degrees
* @param dX horizontal translation needed to put the box inside parent item
* @param dY vertical translation needed to put the box inside parent item
* @return true, if rectBB is contained in parent item and false otherwise
*/
bool VTextGraphicsItem::IsContained(QRectF rectBB, qreal dRot, qreal &dX, qreal &dY) const
{
QRectF rectParent = parentItem()->boundingRect();
rectBB = GetBoundingRect(rectBB, dRot);
dX = 0;
dY = 0;
if (rectParent.contains(rectBB) == false)
{
if (rectParent.left() - rectBB.left() > fabs(dX))
{
dX = rectParent.left() - rectBB.left();
}
else if (rectBB.right() - rectParent.right() > fabs(dX))
{
dX = rectParent.right() - rectBB.right();
}
if (rectParent.top() - rectBB.top() > fabs(dY))
{
dY = rectParent.top() - rectBB.top();
}
else if (rectBB.bottom() - rectParent.bottom() > fabs(dY))
{
dY = rectParent.bottom() - rectBB.bottom();
}
return false;
}
return true;
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::UpdateData Updates the detail label
* @param qsName name of detail
* @param data reference to VPatternPieceData
*/
void VTextGraphicsItem::UpdateData(const QString &qsName, const VPieceLabelData &data)
{
m_tm.Update(qsName, data);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::UpdateData Updates the pattern label
* @param pDoc pointer to the pattern object
*/
void VTextGraphicsItem::UpdateData(VAbstractPattern* pDoc)
{
m_tm.Update(pDoc);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::GetTextLines returns the number of lines of text to show
* @return number of lines of text
*/
int VTextGraphicsItem::GetTextLines() const
{
return m_tm.GetSourceLinesCount();
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::GetFontSize returns the currently used text base font size
* @return current text base font size
*/
int VTextGraphicsItem::GetFontSize() const
{
return m_tm.GetFont().pixelSize();
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::mousePressEvent handles left button mouse press events
* @param pME pointer to QGraphicsSceneMouseEvent object
*/
void VTextGraphicsItem::mousePressEvent(QGraphicsSceneMouseEvent *pME)
{
if (pME->button() == Qt::LeftButton && pME->type() != QEvent::GraphicsSceneMouseDoubleClick
&& (flags() & QGraphicsItem::ItemIsMovable))
{
if (m_moveType == NotMovable)
{
pME->ignore();
return;
}
// record the parameters of the mouse press. Specially record the position
// of the press as the origin for the following operations
m_ptStartPos = pos();
m_ptStart = pME->scenePos();
m_szStart = m_rectBoundingBox.size();
m_ptRotCenter = mapToScene(m_rectBoundingBox.center());
m_dAngle = GetAngle(pME->scenePos());
m_dRotation = rotation();
// in rotation mode, do not do any changes here, because user might want to
// rotate the label more.
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();
}
}
else
{
pME->ignore();
}
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::mouseMoveEvent handles mouse move events
* @param pME pointer to QGraphicsSceneMouseEvent object
*/
void VTextGraphicsItem::mouseMoveEvent(QGraphicsSceneMouseEvent* pME)
{
qreal dX;
qreal dY;
QRectF rectBB;
const QPointF ptDiff = pME->scenePos() - m_ptStart;
if (m_eMode == mMove && m_moveType & IsMovable)
{
// in move mode move the label along the mouse move from the origin
QPointF pt = m_ptStartPos + ptDiff;
rectBB.setTopLeft(pt);
rectBB.setWidth(m_rectBoundingBox.width());
rectBB.setHeight(m_rectBoundingBox.height());
// before moving label to a new position, check if it will still be inside the parent item
if (IsContained(rectBB, rotation(), dX, dY) == false)
{
pt.setX(pt.x() + dX);
pt.setY(pt.y() + dY);
}
setPos(pt);
UpdateBox();
}
else if (m_eMode == mResize && m_moveType & IsResizable)
{
// in resize mode, resize the label along the mouse move from the origin
QPointF pt;
if (m_moveType & IsMovable)
{
pt = m_ptStartPos;
}
else
{
pt = m_ptRotCenter - QRectF(0, 0, m_szStart.width() + ptDiff.x(),
m_szStart.height() + ptDiff.y()).center();
}
rectBB.setTopLeft(pt);
QSizeF sz(m_szStart.width() + ptDiff.x(), m_szStart.height() + ptDiff.y());
rectBB.setSize(sz);
// before resizing the label to a new size, check if it will still be inside the parent item
if (IsContained(rectBB, rotation(), dX, dY) == false)
{
sz = QSizeF(sz.width()+dX, sz.height()+dY);
}
else
{
if (not (m_moveType & IsMovable))
{
setPos(pt);
}
}
SetSize(sz.width(), sz.height());
Update();
emit SignalShrink();
}
else if (m_eMode == mRotate && m_moveType & IsRotatable)
{
// if the angle from the original position is small (0.5 degrees), just remeber the new angle
// new angle will be the starting angle for rotation
if (fabs(m_dAngle) < 0.01)
{
m_dAngle = GetAngle(pME->scenePos());
return;
}
// calculate the angle difference from the starting angle
double dAng = qRadiansToDegrees(GetAngle(pME->scenePos()) - m_dAngle);
rectBB.setTopLeft(m_ptStartPos);
rectBB.setWidth(m_rectBoundingBox.width());
rectBB.setHeight(m_rectBoundingBox.height());
// check if the rotated label will be inside the parent item and then rotate it
if (IsContained(rectBB, m_dRotation + dAng, dX, dY) == true)
{
setRotation(m_dRotation + dAng);
Update();
}
}
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::mouseReleaseEvent handles left button mouse release events
* @param pME pointer to QGraphicsSceneMouseEvent object
*/
void VTextGraphicsItem::mouseReleaseEvent(QGraphicsSceneMouseEvent* pME)
{
if (pME->button() == Qt::LeftButton)
{
// restore the cursor
if ((m_eMode == mMove || m_eMode == mRotate || m_eMode == mResize) && (flags() & QGraphicsItem::ItemIsMovable))
{
SetItemOverrideCursor(this, cursorArrowOpenHand, 1, 1);
}
double dDist = fabs(pME->scenePos().x() - m_ptStart.x()) + fabs(pME->scenePos().y() - m_ptStart.y());
// determine if this was just press/release (bShort == true) or user did some operation between press and release
bool bShort = (dDist < 2);
if (m_eMode == mMove || m_eMode == mResize)
{ // if user just pressed and released the button, we must switch the mode to rotate
// but if user did some operation (move/resize), emit the proper signal and update the label
if (bShort == true)
{
if (m_bReleased == true && m_moveType & IsRotatable)
{
m_eMode = mRotate;
UpdateBox();
}
}
else if (m_eMode == mMove && m_moveType & IsMovable)
{
emit SignalMoved(pos());
UpdateBox();
}
else if (m_moveType & IsResizable)
{
emit SignalResized(m_rectBoundingBox.width(), m_tm.GetFont().pixelSize());
Update();
}
}
else
{ // in rotate mode, if user did just press/release, switch to move mode
if (bShort == true && (m_moveType & IsMovable || m_moveType & IsResizable))
{
m_eMode = mMove;
}
else if (m_moveType & IsRotatable)
{
// if user rotated the item, emit proper signal and update the label
emit SignalRotated(rotation());
}
UpdateBox();
}
m_bReleased = true;
}
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::hoverMoveEvent checks if cursor has to be changed
* @param pHE pointer to the scene hover event
*/
void VTextGraphicsItem::hoverMoveEvent(QGraphicsSceneHoverEvent* pHE)
{
if (m_eMode == mResize && m_moveType & IsResizable)
{
if (m_rectResize.contains(pHE->pos()) == true)
{
setCursor(Qt::SizeFDiagCursor);
}
else
{
SetItemOverrideCursor(this, cursorArrowOpenHand, 1, 1);
}
}
VPieceItem::hoverMoveEvent(pHE);
}
//---------------------------------------------------------------------------------------------------------------------
void VTextGraphicsItem::hoverEnterEvent(QGraphicsSceneHoverEvent *pME)
{
if (flags() & QGraphicsItem::ItemIsMovable)
{
SetItemOverrideCursor(this, cursorArrowOpenHand, 1, 1);
}
VPieceItem::hoverEnterEvent(pME);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::UpdateBox redraws the label content
*/
void VTextGraphicsItem::UpdateBox()
{
update(m_rectBoundingBox);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::UpdateFont sets the text font size, so that the entire text will
* just fit into the label bounding box
*/
void VTextGraphicsItem::CorrectLabel()
{
qreal dX;
qreal dY;
QRectF rectBB;
rectBB.setTopLeft(pos());
rectBB.setSize(m_rectBoundingBox.size());
if (IsContained(rectBB, rotation(), dX, dY) == false)
{
// put the label inside the pattern
setPos(pos().x() + dX, pos().y() + dY);
}
m_tm.FitFontSize(m_rectBoundingBox.width(), m_rectBoundingBox.height());
UpdateBox();
}
//---------------------------------------------------------------------------------------------------------------------
void VTextGraphicsItem::AllUserModifications(const QPointF &pos)
{
if (m_eMode != mRotate)
{
UserMoveAndResize(pos);
}
else
{
SetItemOverrideCursor(this, cursorArrowCloseHand, 1, 1);
}
}
//---------------------------------------------------------------------------------------------------------------------
void VTextGraphicsItem::UserRotateAndMove()
{
if (m_eMode != mRotate)
{
m_eMode = mMove;
}
SetItemOverrideCursor(this, cursorArrowCloseHand, 1, 1);
}
//---------------------------------------------------------------------------------------------------------------------
void VTextGraphicsItem::UserMoveAndResize(const QPointF &pos)
{
if (m_rectResize.contains(pos) == true)
{
m_eMode = mResize;
setCursor(Qt::SizeFDiagCursor);
}
else
{
m_eMode = mMove; // block later if need
SetItemOverrideCursor(this, cursorArrowCloseHand, 1, 1);
}
}
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