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

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/************************************************************************
**
** @file vtextgraphicsitem.h
** @author Bojan Kverh
** @date June 16, 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 <QPainter>
#include <QStyleOptionGraphicsItem>
#include <QGraphicsSceneMouseEvent>
#include <QGraphicsView>
#include <QTransform>
#include <QCursor>
#include <QtMath>
#include <QDebug>
#include "../vmisc/def.h"
#include "vtextgraphicsitem.h"
#define RESIZE_SQUARE 30
#define ROTATE_CIRCLE 20
#define ROTATE_RECT 60
#define ROTATE_ARC 50
#define MIN_W 120
#define MIN_H 60
#define TOP_Z 2
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::VTextGraphicsItem constructor
* @param pParent pointer to the parent item
*/
VTextGraphicsItem::VTextGraphicsItem(QGraphicsItem* pParent)
:QGraphicsObject(pParent), m_eMode(VTextGraphicsItem::mNormal), m_bReleased(false),
m_ptStartPos(), m_ptStart(), m_ptRotCenter(), m_szStart(), m_dRotation(0), m_dAngle(0),
m_rectResize(), m_iMinH(MIN_H), m_rectBoundingBox(), m_tm()
{
m_rectBoundingBox.setTopLeft(QPointF(0, 0));
SetSize(MIN_W, m_iMinH);
setZValue(TOP_Z);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::~VTextGraphicsItem destructor
*/
VTextGraphicsItem::~VTextGraphicsItem()
{}
//---------------------------------------------------------------------------------------------------------------------
/**
* @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);
painter->fillRect(option->rect, QColor(251, 251, 175));
painter->setRenderHints(QPainter::Antialiasing | QPainter::TextAntialiasing);
// draw text lines
int iY = 0;
int iH = 0;
painter->setPen(Qt::black);
QFont fnt = m_tm.GetFont();
for (int i = 0; i < m_tm.GetCount(); ++i)
{
const TextLine& tl = m_tm.GetLine(i);
iH = tl.m_iHeight;
fnt.setPixelSize(m_tm.GetFont().pixelSize() + tl.m_iFontSize);
fnt.setWeight(tl.m_eFontWeight);
fnt.setStyle(tl.m_eStyle);
painter->setFont(fnt);
painter->drawText(0, iY, qRound(boundingRect().width()), iH, tl.m_eAlign, tl.m_qsText);
iY += iH + 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);
if (m_eMode == mResize)
{
// draw the resize diagonal lines
painter->drawLine(0, 0, qRound(m_rectBoundingBox.width()), qRound(m_rectBoundingBox.height()));
painter->drawLine(0, qRound(m_rectBoundingBox.height()), qRound(m_rectBoundingBox.width()), 0);
}
}
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),
ROTATE_CIRCLE,
ROTATE_CIRCLE
);
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::Reset resets the item, putting the mode and z coordinate to normal and redraws it
*/
void VTextGraphicsItem::Reset()
{
m_eMode = mNormal;
m_bReleased = false;
Update();
setZValue(TOP_Z);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::AddLine adds a line of text to the label list. If necessary, it also resizes the
* label bounding box until it is big enough to contain all the text
* @param tl line of text to add
*/
void VTextGraphicsItem::AddLine(const TextLine& tl)
{
m_tm.AddLine(tl);
while (m_tm.IsBigEnough(MIN_W, m_iMinH, MIN_FONT_SIZE) == false)
{
m_iMinH += 5;
}
if (m_rectBoundingBox.height() < m_iMinH)
{
SetSize(m_rectBoundingBox.width(), m_iMinH);
}
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::Clear deletes all the label texts
*/
void VTextGraphicsItem::Clear()
{
m_tm.Clear();
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @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)
{
// don't allow resize under specific size
if (fW < MIN_W || fH < m_iMinH)
{
return;
}
m_rectBoundingBox.setTopLeft(QPointF(0, 0));
m_rectBoundingBox.setWidth(fW);
m_rectBoundingBox.setHeight(fH);
m_rectResize.setTopLeft(QPointF(fW - RESIZE_SQUARE, fH - RESIZE_SQUARE));
m_rectResize.setWidth(RESIZE_SQUARE);
m_rectResize.setHeight(RESIZE_SQUARE);
setTransformOriginPoint(m_rectBoundingBox.center());
prepareGeometryChange();
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::Update sets the correct font size and redraws the label
*/
void VTextGraphicsItem::Update()
{
UpdateFont();
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 VPatternPieceData &data)
{
m_tm.Update(qsName, data);
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::UpdateData Updates the pattern label
* @param pDoc pointer to the pattern object
*/
void VTextGraphicsItem::UpdateData(const 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.GetCount();
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @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::boundingRect returns the label bounding box
* @return label bounding box
*/
QRectF VTextGraphicsItem::boundingRect() const
{
return m_rectBoundingBox;
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @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)
{
// 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_eMode != mRotate)
{
// if user pressed the button inside the resize square, switch to resize mode
if (m_rectResize.contains(pME->pos()) == true)
{
m_eMode = mResize;
SetOverrideCursor(Qt::SizeFDiagCursor);
}
else
{
// if user pressed the button outside the resize square, switch to move mode
m_eMode = mMove;
SetOverrideCursor(cursorArrowCloseHand, 1, 1);
}
}
// raise the label and redraw it
setZValue(TOP_Z + 1);
UpdateBox();
}
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::mouseMoveEvent handles mouse move events
* @param pME pointer to QGraphicsSceneMouseEvent object
*/
void VTextGraphicsItem::mouseMoveEvent(QGraphicsSceneMouseEvent* pME)
{
qreal dX;
qreal dY;
QRectF rectBB;
QPointF ptDiff = pME->scenePos() - m_ptStart;
if (m_eMode == mMove)
{
// 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)
{
// in resize mode, resize the label along the mouse move from the origin
QPointF pt = m_ptStartPos;
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) == true)
{
SetSize(sz.width(), sz.height());
Update();
emit SignalShrink();
}
}
else if (m_eMode == mRotate)
{
// 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)
{
RestoreOverrideCursor(cursorArrowCloseHand);
}
else if (m_eMode == mResize)
{
RestoreOverrideCursor(Qt::SizeFDiagCursor);
}
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_eMode = mRotate;
UpdateBox();
}
}
else if (m_eMode == mMove)
{
emit SignalMoved(pos());
UpdateBox();
}
else
{
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_eMode = mMove;
UpdateBox();
}
else
{
// if user rotated the item, emit proper signal and update the label
emit SignalRotated(rotation());
UpdateBox();
}
}
m_bReleased = true;
}
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @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::UpdateFont()
{
int iFS = m_tm.GetFont().pixelSize();
// increase the font size until the bounding rect is not big enough
while (iFS < MAX_FONT_SIZE && m_tm.IsBigEnough(m_rectBoundingBox.width(), m_rectBoundingBox.height(), iFS) == true)
{
++iFS;
}
// decrease the font size until the bounding rect is big enough
while (iFS >= MIN_FONT_SIZE && m_tm.IsBigEnough(m_rectBoundingBox.width(), m_rectBoundingBox.height(), iFS) == false)
{
--iFS;
}
m_tm.SetFontSize(iFS);
UpdateBox();
}
//---------------------------------------------------------------------------------------------------------------------
/**
* @brief VTextGraphicsItem::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
*/
double VTextGraphicsItem::GetAngle(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 VTextGraphicsItem::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 VTextGraphicsItem::GetBoundingRect(QRectF rectBB, qreal dRot) const
{
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;
}
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