Rotation Problem

[spirit]

Can you disclose you code snippet in CODE tags? It's really hard to read it.

[Raghaw]

QRectF CRectangle::getUntransformedRect(QPainter *painter, QRectF rect)
{
if (!painter->transform().isScaling()/* || scaleFactor < 1*/)
return rect;
 
QTransform transform = painter->transform();
QRectF transFormedRect = transform.mapRect(rect);
float scaleFactor = transFormedRect.width() / rect.width();
 
QRectF destRect = rect;
destRect.setWidth(rect.width() / scaleFactor);
destRect.setHeight(rect.height() / scaleFactor);
destRect.moveCenter(rect.center());
return destRect;
}
 
void CRectangle::updateAngleHandle()
{
if(m_ShowRotation)
{
m_RotateLine.setP1(m_Handles[7].center());
float size = m_ActualRectangle.width();
m_RotateLine.setP2(QPointF(m_Handles[7].center().x() + (size / 4), m_Handles[7].center().y()));
QPointF point = m_RotateLine.p2();
 
QPointF destArrowP1 = point;
destArrowP1.setY(point.y() + 8.0);
destArrowP1.setX(point.x() - 8.0);
QPointF destArrowP2 = destArrowP1;
destArrowP2.setY(point.y() - 8);
 
int points[] = {point.x(), point.y(), destArrowP1.x(), destArrowP1.y(), destArrowP2.x(), destArrowP2.y()};
m_AngleHandle.setPoints(3, points);
}
}
 
 
void CRectangle::drawShape(QPainter *painter)
{
if(!m_ActualRectangle.isEmpty() && m_Show)
{
painter->setPen(m_DrawingPen);
painter->setBrush(QColor(0, 0, 0, 0));
painter->save();
//painter->setTransform(m_transform);
QTransform transform = painter->transform();
QPointF centerPoint = m_transform.map(m_ActualRectangle.center());
transform.translate(centerPoint.x(), centerPoint.y());
transform.rotate(-m_Angle);
transform.translate(-centerPoint.x(), -centerPoint.y());
painter->setTransform(transform);
painter->drawRect(m_ActualRectangle);
 
if(m_NeedCenterCross)
{
painter->drawLines(m_CenterCrossLine);
}
if(m_ShowHandles && m_Enable)
{
//drawing resizable handles
 
painter->setPen(QColor(255, 255, 255));
painter->setBrush(Qt::black);
 
Q_FOREACH( QRectF rect , m_Handles) /// This is for drawing resizable handles
{
QRectF notTransformedRect = getUntransformedRect(painter, rect);
painter->drawRect(notTransformedRect);
}
 
//painter->restore();
 
 
//painter->drawText(m_Handles[i].topLeft(), QString::number(i));
 
if(m_ShowRotation) // For Arrow Handle
{
m_RotateLine.setP1(m_Handles[7].center());
float size = m_ActualRectangle.width();
m_RotateLine.setP2(QPointF(m_Handles[7].center().x() + (size / 4), m_Handles[7].center().y()));
QPointF point = m_RotateLine.p2();
 
QPointF destArrowP1 = point;
destArrowP1.setY(point.y() + 8.0);
destArrowP1.setX(point.x() - 8.0);
QPointF destArrowP2 = destArrowP1;
destArrowP2.setY(point.y() - 8);
 
QRectF angleRect(destArrowP2, QSizeF(point.x() - destArrowP2.x(), destArrowP1.y() - destArrowP2.y()));
QRectF angleRectUnScaled = getUntransformedRect(painter, angleRect);
 
point.setX(angleRectUnScaled.topRight().x());
point.setY(angleRectUnScaled.center().y());
 
destArrowP1 = angleRectUnScaled.bottomLeft();
destArrowP2 = angleRectUnScaled.topLeft();
 
int points[] = {point.x(), point.y(), destArrowP1.x(), destArrowP1.y(), destArrowP2.x(), destArrowP2.y()};
m_AngleHandle.setPoints(3, points);
 
QPen pen;
pen.setColor(m_DrawingPen.color());
painter->setPen(pen);
painter->setBrush(Qt::black);
painter->drawLine(m_RotateLine);
painter->drawPolygon(m_AngleHandle);
}
}
else
{
painter->restore();
}
painter->restore();
 
if(m_Failed)
{
painter->setPen(QColor(Qt::red));
painter->drawLine(m_transform.map(m_Handles[0].topLeft()), m_transform.map(m_Handles[4].topLeft()));
painter->drawLine(m_transform.map(m_Handles[2].topLeft()), m_transform.map(m_Handles[6].topLeft()));
}

QRectF CRectangle::getUntransformedRect(QPainter *painter, QRectF rect)
{
if (!painter->transform().isScaling()/* || scaleFactor < 1*/)
return rect;

QTransform transform = painter->transform();
QRectF transFormedRect = transform.mapRect(rect);
float scaleFactor = transFormedRect.width() / rect.width();

QRectF destRect = rect;
destRect.setWidth(rect.width() / scaleFactor);
destRect.setHeight(rect.height() / scaleFactor);
destRect.moveCenter(rect.center());
return destRect;
}

void CRectangle::updateAngleHandle()
{
if(m_ShowRotation)
{
m_RotateLine.setP1(m_Handles[7].center());
float size = m_ActualRectangle.width();
m_RotateLine.setP2(QPointF(m_Handles[7].center().x() + (size / 4), m_Handles[7].center().y()));
QPointF point = m_RotateLine.p2();

QPointF destArrowP1 = point;
destArrowP1.setY(point.y() + 8.0);
destArrowP1.setX(point.x() - 8.0);
QPointF destArrowP2 = destArrowP1;
destArrowP2.setY(point.y() - 8);

int points[] = {point.x(), point.y(), destArrowP1.x(), destArrowP1.y(), destArrowP2.x(), destArrowP2.y()};
m_AngleHandle.setPoints(3, points);
}
}


void CRectangle::drawShape(QPainter *painter)
{
if(!m_ActualRectangle.isEmpty() && m_Show)
{
painter->setPen(m_DrawingPen);
painter->setBrush(QColor(0, 0, 0, 0));
painter->save();
//painter->setTransform(m_transform);
QTransform transform = painter->transform();
QPointF centerPoint = m_transform.map(m_ActualRectangle.center());
transform.translate(centerPoint.x(), centerPoint.y());
transform.rotate(-m_Angle);
transform.translate(-centerPoint.x(), -centerPoint.y());
painter->setTransform(transform);
painter->drawRect(m_ActualRectangle);

if(m_NeedCenterCross)
{
painter->drawLines(m_CenterCrossLine);
}
if(m_ShowHandles && m_Enable)
{
//drawing resizable handles

painter->setPen(QColor(255, 255, 255));
painter->setBrush(Qt::black);

Q_FOREACH( QRectF rect , m_Handles) /// This is for drawing resizable handles
{
QRectF notTransformedRect = getUntransformedRect(painter, rect);
painter->drawRect(notTransformedRect);
}

//painter->restore();


//painter->drawText(m_Handles[i].topLeft(), QString::number(i));

if(m_ShowRotation) // For Arrow Handle
{
m_RotateLine.setP1(m_Handles[7].center());
float size = m_ActualRectangle.width();
m_RotateLine.setP2(QPointF(m_Handles[7].center().x() + (size / 4), m_Handles[7].center().y()));
QPointF point = m_RotateLine.p2();

QPointF destArrowP1 = point;
destArrowP1.setY(point.y() + 8.0);
destArrowP1.setX(point.x() - 8.0);
QPointF destArrowP2 = destArrowP1;
destArrowP2.setY(point.y() - 8);

QRectF angleRect(destArrowP2, QSizeF(point.x() - destArrowP2.x(), destArrowP1.y() - destArrowP2.y()));
QRectF angleRectUnScaled = getUntransformedRect(painter, angleRect);

point.setX(angleRectUnScaled.topRight().x());
point.setY(angleRectUnScaled.center().y());

destArrowP1 = angleRectUnScaled.bottomLeft();
destArrowP2 = angleRectUnScaled.topLeft();

int points[] = {point.x(), point.y(), destArrowP1.x(), destArrowP1.y(), destArrowP2.x(), destArrowP2.y()};
m_AngleHandle.setPoints(3, points);

QPen pen;
pen.setColor(m_DrawingPen.color());
painter->setPen(pen);
painter->setBrush(Qt::black);
painter->drawLine(m_RotateLine);
painter->drawPolygon(m_AngleHandle);
}
}
else
{
painter->restore();
}
painter->restore();

if(m_Failed)
{
painter->setPen(QColor(Qt::red));
painter->drawLine(m_transform.map(m_Handles[0].topLeft()), m_transform.map(m_Handles[4].topLeft()));
painter->drawLine(m_transform.map(m_Handles[2].topLeft()), m_transform.map(m_Handles[6].topLeft()));
}

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